CN112057065B - Blood pressure measuring method and electronic equipment - Google Patents

Abstract

The embodiment of the application discloses a blood pressure measuring method and electronic equipment, relates to the field of electronic equipment, and solves the problems that a user is uncomfortable due to overlong blood pressure measuring time and the blood pressure measurement is inaccurate due to the fact that the user is uncomfortable. The specific scheme is as follows: the electronic equipment controls the air pump to inflate the air bag at a first inflation rate; the electronic equipment judges whether a pulse wave signal appears or not in the process of controlling the air pump to inflate the air bag at the first inflation rate; when the electronic equipment determines that the pulse wave signal appears, the air pump is controlled to inflate the air bag at a second inflation rate, and the second inflation rate is smaller than the first inflation rate; the electronic equipment acquires a pulse wave signal and a static pressure signal in real time according to a pressure signal detected after the airbag is inflated at a second inflation rate; the electronic equipment determines the blood pressure value of the user according to at least one characteristic point in the pulse wave signal and the static pressure signal corresponding to the characteristic point. The embodiment of the application is used in the process of blood pressure measurement.

Description

Blood pressure measurement method and electronic device

technical field

The present application relates to the field of electronic equipment, and in particular, to a blood pressure measurement method and electronic equipment.

Background technique

At present, electronic sphygmomanometers are widely used. The electronic sphygmomanometer has two measurement methods: Measure While Decrease (MWD) and Measure While Increase (MWI). The MWD method is that the electronic sphygmomanometer first rapidly increases the pressure to a pressure value that exceeds the user's systolic blood pressure (SBP), and then slowly decreases the pressure. During the process of depressurization, the electronic sphygmomanometer extracts the original signal including the pulse wave signal and the static pressure signal, and calculates the user's blood pressure value (eg including: diastolic blood pressure and systolic blood pressure) according to the pulse wave signal and the static pressure signal. The MWD method is generally used for upper-arm electronic sphygmomanometers, and the blood pressure measurement time is relatively long. The MWI method is that the electronic sphygmomanometer boosts the pressure at a certain rate, extracts the original signal including the pulse wave signal and the static pressure signal during the boosting process, and extracts the characteristics of the pulse wave signal, and calculates the user according to the extracted features and the static pressure signal. blood pressure value. After the electronic sphygmomanometer extracts the required characteristics of the pulse wave signal, it starts to lower the pressure by itself, and the measurement ends. The MWI method is generally used in a wristband electronic sphygmomanometer, and the blood pressure measurement time is relatively short.

The mainstream electronic sphygmomanometers on the market are upper arm electronic sphygmomanometers and wristband electronic sphygmomanometers. These two types of electronic blood pressure monitors can meet the needs of users for blood pressure measurement, but they cannot be worn for a long time in terms of device size and weight. That is, it is powerless for some needs that require long-term blood pressure measurement (such as nighttime blood pressure measurement, real-time blood pressure tracking detection, blood pressure feedback control, etc.). And these needs are precisely the important means to effectively prevent and control hypertension, stroke and other sudden diseases, and are rigid needs for users, especially hypertensive patients.

In view of this, some manufacturers have begun to develop wearable electronic blood pressure monitors, such as blood pressure watches. In order to shorten the blood pressure measurement time, most wearable electronic sphygmomanometers use the MWI method. The appearance of the blood pressure watch is the same as that of an ordinary electronic watch, except that an airbag is installed inside the wristband. When the watch is worn on the wrist, the airbag will be close to the skin. The pump valve and pressure sensor in the watch body are connected to the airbag. The pump valve is used to control the inflation and deflation of the airbag. The pressure to determine the user's blood pressure value. For example, please refer to FIG. 1 , which is a schematic diagram of signal decomposition of a blood pressure measurement method provided in the prior art. The determination of the user's blood pressure value according to the picked-up pressure is specifically: an original signal can be obtained according to the airbag pressure picked up by the pressure sensor, and the original signal can be obtained from the original signal. The static pressure signal and pulse wave signal can be extracted from it. The blood pressure-related signal features are extracted from the pulse wave signal, and the diastolic blood pressure (DBP) and the time of SBP appearing are calculated from the signal features, and are mapped to the static pressure signal to calculate the diastolic blood pressure and the systolic blood pressure.

As shown in FIG. 1 , the electronic device can obtain the original signal according to the acquired pressure value of the airbag, and obtain the static pressure signal and the pulse wave signal according to the original signal. The pulse wave signal generally appears in the last segment of the linear boost of the blood pressure watch (signal 2 shown in FIG. 1 is the signal after the pulse wave signal appears). In this embodiment of the present application, for convenience of description, the original signal shown in FIG. 1 may be divided into signal 1 and signal 2 . The signal 1 represents the signal when the pulse wave signal does not appear in the original signal, and the signal 2 represents the signal from which the pulse wave signal can be extracted from the original signal. It can be understood that the signal 1 and the signal 2 may be continuous signals detected during the process of inflating the airbag by the air pump.

The static pressure corresponding to the characteristic point of the pulse wave signal is strongly correlated with the actual blood pressure value of the user at that time. The higher the blood pressure, the greater the static pressure required for the complete appearance of the characteristic points of the pulse wave signal, and the greater the maximum compression pressure. In order to extract a complete and high-quality pulse wave signal, most of the blood pressure watch products on the market currently use a constant-rate linear pressurization scheme, that is, the same rate of pressurization is maintained throughout the whole process of pressurizing the watch until the end of the pressurization. Deflation. This also results in a longer blood pressure measurement time required for the higher the user's blood pressure.

Prolonged blood pressure measurement may reduce the accuracy of blood pressure measurement due to user discomfort. For example: 1. The blood pressure circulation of the hand is blocked for a long time, which will make the user feel sour and numb; 2. The pressure is too long without the blood pressure value, which will easily make the user feel anxious and impatient, resulting in short blood pressure. The measured blood pressure value is prone to deviation; 3. During the blood pressure measurement process, the user needs to maintain the correct measurement posture (that is, the human body is still, and the wrist is at the same height as the heart). If the duration is too long , the muscle strength that supports and maintains the measurement posture is insufficient (especially the middle-aged and elderly people), and the user's arms and wrists will unconsciously shake slightly. The signal generated by this tiny shaking will be loaded into the pulse wave signal as noise, reducing the pulse rate The signal-to-noise ratio of the wave signal reduces the accuracy of the blood pressure measurement.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a blood pressure measurement method and an electronic device, which solve the problems of user discomfort caused by too long blood pressure measurement time and inaccurate blood pressure measurement caused thereby.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

In a first aspect, an embodiment of the present application provides a blood pressure measurement method, which can be applied to an electronic device, and the electronic device includes an air bag and an air pump. The blood pressure measurement method includes: the electronic device controls the air pump to inflate the air bag at a first inflation rate. During the process of controlling the air pump to inflate the airbag at the first inflation rate, the electronic device determines whether the pulse wave signal appears. When determining that the pulse wave signal appears, the electronic device controls the air pump to inflate the airbag at a second inflation rate, and the second inflation rate is smaller than the first inflation rate. The electronic device acquires the pulse wave signal and the static pressure signal in real time according to the pressure signal detected after the airbag is inflated at the second inflation rate. The electronic device determines the blood pressure value of the user according to at least one feature point in the pulse wave signal and the static pressure signal corresponding to the feature point.

In this way, by rapidly increasing the pressure in the pressure segment before the pulse wave signal appears (ie, inflating the air bag at the first inflation rate), the time of the blood pressure measurement process is shortened, thereby solving the problem of user discomfort caused by long-term measurement , and solves the problem of inaccurate measurement due to user discomfort. Further, when the pulse wave signal appears, the air bag is controlled to increase the pressure at a normal rate (ie, the air bag is inflated at the second inflation rate), which prolongs the extraction time of the pulse wave signal and improves the accuracy of blood pressure measurement.

With reference to the first aspect, in a possible implementation manner, judging whether the pulse wave signal appears, includes: when the electronic device controls the air pump to inflate the air bag at the first inflation rate, detecting the pressure value of the air bag, and judging the current moment Whether the pressure value of the airbag is greater than the pressure threshold; wherein, when the pressure value of the airbag at the current moment is greater than the pressure threshold, it is determined that the pulse wave signal appears, and when the pressure value of the airbag at the current moment is less than the pressure threshold, it is determined that the pulse wave signal does not appear.

In this way, when the pressure value of the airbag is greater than the pressure threshold, it is determined that the pulse wave signal appears, which can ensure that when the pulse wave appears, the rapid boosting stage (that is, the stage of inflating the airbag at the first inflation rate) has ended, thereby ensuring the pulse wave. accurate extraction of the signal.

In combination with the first aspect and the above possible implementation manners, in another possible implementation manner, judging whether the pulse wave signal occurs includes: the electronic device detects the airbag's airbag in the process of controlling the air pump to inflate the airbag at the first inflation rate. pressure signal, and determine whether the pulse wave signal can be extracted from the detected pressure signal. Wherein, when the pulse wave signal can be extracted from the detected pressure signal, it is determined that the pulse wave signal appears, and when the pulse wave signal cannot be extracted from the detected pressure signal, it is determined that the pulse wave signal does not appear.

In this way, by analyzing the pressure signal in the current blood pressure measurement process, it can be accurately determined whether the pulse wave signal appears.

In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the electronic device determines the pressure threshold according to historical measurement data, and the historical measurement data includes: the pressure of the air bag when the pulse wave signal occurs during multiple blood pressure measurement processes The pressure threshold is the minimum pressure value of the air bag when the pulse wave signal appears in the history of multiple blood pressure measurements.

In this way, the pressure threshold value is determined by the minimum value of the pressure value of the air bag when the pulse wave signal appears in the history of multiple blood pressure measurement processes, which can ensure that in this measurement process, when the pressure value of the air bag reaches the pressure threshold value, the pulse wave signal Has appeared or will appear in a very short time.

In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the electronic device acquires at least one pressure interval, and the pulse wave signal included in the detected pressure signal in the at least one pressure interval may include feature points ; After controlling the air pump to inflate the air bag at the second inflation rate, the electronic device detects the pressure value of the air bag; for each pressure interval in at least one pressure interval, the electronic device starts from the pressure value of the air bag equal to the minimum value of the pressure interval, and controls The air pump inflates the airbag at a third inflation rate until the pressure value of the airbag is equal to the maximum value of the pressure interval, and then re-controls the air pump to inflate the airbag at a second inflation rate, the third inflation rate being less than the second inflation rate.

In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the electronic device determines at least one pressure interval according to historical measurement data, and the historical measurement data includes: characteristic points of pulse wave signals in multiple blood pressure measurement processes. The pressure value of the airbag at the time of occurrence, and at least one pressure interval is a set of pressure values of the airbag when the characteristic point of the pulse wave signal appears in the historical multiple blood pressure measurement processes.

In this way, in combination with the pressure intervals in which the characteristic points of the pulse wave signal appear in the past multiple blood pressure measurement processes, the possible pressure value intervals of the airbag when the characteristic points appear in the current measurement process can be accurately determined. In this interval, the airbag is inflated at a slower rate (ie, the airbag is inflated at the third inflation rate), which can further improve the accuracy of feature point extraction. Outside this range, inflating the airbag at a normal rate can ensure that the pressure of the airbag can quickly rise to the pressure range when the next feature point occurs, which can avoid unnecessary waste of time to improve accuracy.

In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, the electronic device determines the first inflation rate according to the pressure threshold and a preset boost time, and the boost time is when the pressure value of the airbag increases from 0. Time required to reach pressure threshold.

In this way, it can be ensured that for users with different blood pressures, the pressure value of the air bag can rise to the air bag pressure value at which the pulse wave signal appears within a short time (eg, a preset boost time).

In combination with the first aspect and the above possible implementation manner, in another possible implementation manner, before the electronic device controls the air pump to inflate the airbag at the first inflation rate, the method further includes: the electronic device determines whether the control can be performed according to historical measurement data. The air pump inflates the air bag at the first inflation rate, and the historical measurement data includes: the pressure value of the air bag when the pulse wave signal appears during multiple blood pressure measurements; the electronic device controls the air pump to inflate the air bag at the first inflation rate, including: the electronic device determines In the historical measurement data, when the difference between the pressure values of the air bag when the pulse wave signal appears in any two blood pressure measurement processes is less than the change threshold, the air pump is controlled to inflate the air bag at the first inflation rate; When the wave signal appears, the difference between the pressure values of the airbags is greater than the variation threshold, and the air pump is controlled to inflate the airbags at the second inflation rate.

In this way, according to the historical measurement data, it is judged whether the method of rapid pressure boosting can be used to make the pressure value of the airbag quickly reach the pressure value of the pulse wave signal. The pulse wave signal caused by the rapid boosting of the reference is still in the problem of rapid boosting, that is to say, this method can effectively avoid the reduction of the extraction accuracy of the pulse wave signal.

In a second aspect, an embodiment of the present application provides an electronic device. The electronic device includes a control unit, a judgment unit, a determination unit, an airbag and an air pump; the control unit is used to control the air pump to inflate the airbag at a first inflation rate; the judgment unit is used to control the air pump to inflate the airbag at the first inflation rate. During the process, it is judged whether the pulse wave signal appears; the control unit is also used to control the air pump to inflate the airbag at a second inflation rate when it is determined that the pulse wave signal appears, and the second inflation rate is less than the first inflation rate; the determining unit is used for Acquire the pulse wave signal and the static pressure signal in real time according to the pressure signal detected after the airbag is inflated at the second inflation rate; The signal determines the user's blood pressure value.

With reference to the second aspect, in a possible implementation manner, the electronic device further includes a detection unit, which is used to detect the pressure value of the airbag during the process of controlling the air pump to inflate the airbag at the first inflation rate; the judgment unit judges the pulse Whether the wave signal appears, includes: the judgment unit determines whether the pressure value of the air bag at the current moment is greater than the pressure threshold; wherein, when the pressure value of the air bag at the current moment is greater than the pressure threshold, it is determined that the pulse wave signal appears, and when the pressure value of the air bag at the current moment is less than the pressure When the threshold is reached, it is determined that the pulse wave signal does not appear.

With reference to the second aspect and the above possible implementation manner, in another possible implementation manner, the electronic device further includes a detection unit, and the detection unit is configured to detect the airbag in the process of controlling the air pump to inflate the airbag at the first inflation rate. pressure signal; the judgment unit judges whether the pulse wave signal appears, including: the judgment unit judges whether the pulse wave signal can be extracted from the detected pressure signal; wherein, when the pulse wave signal can be extracted from the detected pressure signal, determine The pulse wave signal appears, and when the pulse wave signal cannot be extracted from the detected pressure signal, it is determined that the pulse wave signal does not appear.

In combination with the second aspect and the above possible implementation manner, in another possible implementation manner, the determining unit is further configured to determine a pressure threshold according to historical measurement data, where the historical measurement data includes: the occurrence of pulse wave signals during multiple blood pressure measurements. The pressure value of the air bag is the minimum pressure value of the air bag when the pulse wave signal appears in the history of multiple blood pressure measurements.

With reference to the second aspect and the above possible implementation manner, in another possible implementation manner, the determining unit is further configured to determine at least one pressure interval, and the pulse wave signal included in the detected pressure signal in the at least one pressure interval will include feature points; the detection unit is also used to detect the pressure value of the airbag after the air pump is controlled to inflate the airbag at the second inflation rate; for each pressure interval in the at least one pressure interval, the control unit calculates the pressure value from the airbag equal to Start from the minimum value of the pressure interval, control the air pump to inflate the air bag at the third inflation rate, until the pressure value of the air bag is equal to the maximum value of the pressure interval, re-control the air pump to inflate the air bag at the second inflation rate, and the third inflation rate is smaller than the second inflation rate Inflation rate.

In combination with the second aspect and the above possible implementation manner, in another possible implementation manner, the determining unit is further configured to determine at least one pressure interval according to historical measurement data, where the historical measurement data includes: pulse waves during multiple blood pressure measurements. The pressure value of the air bag when the characteristic point of the signal appears, and at least one pressure interval is a set of pressure values of the air bag when the characteristic point of the pulse wave signal appears in the history of multiple blood pressure measurement processes.

With reference to the second aspect and the above possible implementation manner, in another possible implementation manner, the determining unit is further configured to determine the first inflation rate according to the pressure threshold and a preset boost time, where the boost time is the pressure of the airbag The time it takes for the value to rise from 0 to the pressure threshold.

In combination with the second aspect and the above possible implementation manner, in another possible implementation manner, before the control unit controls the air pump to inflate the airbag at the first inflation rate, the determination unit determines whether the air pump can be controlled to inflate the air bag at the first inflation rate according to historical measurement data. The inflation rate inflates the airbag, and the historical measurement data includes: the pressure value of the airbag when the pulse wave signal appears in the multiple blood pressure measurement processes; the control unit controls the air pump to inflate the airbag at the first inflation rate, including: the judgment unit determines the historical measurement data. When the difference between the pressure values of the air bag when the pulse wave signal appears in any two blood pressure measurement processes is less than the change threshold, the control unit controls the air pump to inflate the air bag at the first inflation rate; wherein, the judgment unit determines any two blood pressures in the historical measurement data. During the measurement process, when the difference between the pressure values of the airbags when the pulse wave signal appears is greater than the variation threshold, the control unit controls the air pump to inflate the airbags at the second inflation rate.

In a third aspect, an embodiment of the present application provides an electronic device, the electronic device may include a processor, configured to be connected to a memory, and call a program stored in the memory to execute the first aspect or a possible implementation manner of the first aspect Any blood pressure measurement method.

In a fourth aspect, embodiments of the present application provide a computer-readable storage medium, including: computer software instructions; when the computer software instructions are executed in the overtemperature protection device, the blood pressure measurement device is made to perform the first aspect or the first aspect. The blood pressure measurement method of any of the possible implementations.

In a fifth aspect, the embodiments of the present application provide a computer program product, which, when the computer program product runs on a computer, enables the computer to execute the blood pressure measurement method according to the first aspect or any of the possible implementations of the first aspect.

It can be understood that the electronic devices described in the second and third aspects provided above, the computer-readable storage medium described in the fourth aspect provided above, and the computer program product described in the fifth aspect are all used to execute the above. Therefore, for the beneficial effects that can be achieved, reference may be made to the beneficial effects in the corresponding methods provided above, which will not be repeated here.

Description of drawings

1 is a schematic diagram of signal decomposition of a blood pressure measurement method provided by the prior art;

2 is a schematic diagram of the composition of an electronic device provided by an embodiment of the present application;

3 is a schematic flowchart of a blood pressure measurement method provided by an embodiment of the present application;

4 is a schematic diagram corresponding to a static pressure signal and a pulse wave signal in a blood pressure measurement process provided by an embodiment of the present application;

5 is a schematic flowchart of a blood pressure measurement method provided by another embodiment of the present application;

6 is a schematic flowchart of another blood pressure measurement method provided by another embodiment of the present application;

7 is a schematic diagram of the composition of an electronic device according to an embodiment of the present application;

FIG. 8 is a schematic diagram of the composition of another electronic device according to an embodiment of the present application.

Detailed ways

Generally speaking, the duration of a single measurement of blood pressure with a traditional mercury sphygmomanometer should not exceed 30 seconds, and the duration of a single measurement with an electronic sphygmomanometer should not exceed 40 seconds, otherwise the user may experience discomfort due to the long measurement time. The measurement result is not accurate.

Taking the electronic sphygmomanometer as the blood pressure watch as an example, the time statistics of 852 blood pressure data samples collected by the blood pressure watch are shown in Table 1.

Table 1

systolic blood pressure Average time to measure <100mmHg 39.51s 100-120mmHg 41.59s 120-140mmHg 42.58s 140-160mmHg 45.12s >=160mmHg 55.75s

As shown in Table 1, the measurement time of systolic blood pressure by the blood pressure watch is greater than or close to 40s. At the same time, the measurement time became significantly longer as the systolic blood pressure increased. Therefore, compared with ordinary users, users with high blood pressure will take longer to measure blood pressure with a blood pressure watch. This will also make the user uncomfortable and lead to inaccurate blood pressure measurement results.

In order to solve the above problem, an embodiment of the present application provides a blood pressure measurement method, which can be applied to an electronic device. Usually, the pulse wave signal appears in the last segment of the linear boost. Using the method of this embodiment, in the pressure range before the pulse wave signal appears, by using a higher boost rate to inflate the airbag of the electronic device, the electronic device can quickly measure the pulse wave signal. That is, the method of the present application can shorten the inflation time before the pulse wave signal appears, thereby reducing the time of blood pressure measurement, avoiding the phenomenon of discomfort for users who measure for a long time, thereby improving the accuracy of blood pressure measurement. After the pulse wave signal appears, the balloon can continue to be inflated using the normal boost rate. Further, in the pressure range where the characteristic point of the pulse wave signal may appear, the airbag is continuously inflated by adopting a lower boosting rate. In order to prolong the acquisition time of the pulse wave signal, the characteristic points of the pulse wave signal can be extracted more accurately, so as to obtain a more accurate static pressure value. Further improve the accuracy of blood pressure measurement.

The implementation of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Exemplarily, the electronic device in the embodiment of the present application may be a mobile phone, a tablet computer, a desktop type, a laptop type, a handheld computer, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, and a cellular Phones, personal digital assistants (PDAs), augmented reality (AR)\virtual reality (VR) devices, wearable devices (such as smart watches, in this embodiment, the smart watches also It may be referred to as a device such as a blood pressure watch, etc.), and the specific form of the device is not particularly limited in this embodiment of the present application.

Please refer to FIG. 2 , which is a schematic diagram of the composition of an electronic device according to an embodiment of the present application. As shown in FIG. 2 , the electronic device 200 may include a Micro-Controller Unit (MCU) 201 , a storage unit 202 , an air pump control unit 203 , an air pump 204 , an air bag 205 and a pressure sensor 206 . These components can be connected by a communication line 207 .

In this embodiment, the MCU 201 may be used to control and process information, and be responsible for signal detection and control of other components.

The storage unit 202 can be used to store the static pressure interval corresponding to the pulse wave signal in the N times of blood pressure measurement in history and the pressure value of the air bag corresponding to the characteristic point in each pulse wave signal (in this implementation, the pressure value of the air bag can also be called is the static pressure value).

The air pump control unit 203 may be used to control the inflation rate output by the air pump 204 . The air pump 204 can be connected to the airbag 205 through a connecting hole or a conduit, and can be used to inflate the airbag 205 or control the airbag 205 to deflate. The air pump control unit 203 can adjust the pressure increasing rate of the air bag 205 when the air pump 204 inflates the air bag 205 by changing the inflation rate output by the air pump 204 . The air pump control unit 203 can control the inflation rate output by the air pump 204 by adjusting the input power (such as voltage or current, etc.) of the air pump 204 , or control the inflation rate output by the air pump 204 by adjusting the duty ratio of the signal input to the air pump 204 rate.

The balloon 205 may be constructed of polyvinyl chloride or silicone. When the airbag 205 is not inflated, the airbag 205 is flat. Once the airbag 205 is inflated, the airbag 205 will slowly expand and compress the radial artery of the wrist. The pulsation of the arteries can form a corresponding relationship. The airbag 205 is provided with at least two connection holes, wherein one connection hole can be used to connect the air pump 204 to realize the inflation or deflation of the airbag 205, and the other connection hole can be used to connect the pressure sensor 206 to realize the pressure sensor 206 Real-time pickup of pressure values for the bladder.

In the embodiment of the present application, the electronic device may not include the air pump 204 and the airbag 205, but is connected with the air pump and the airbag.

The MCU 201 may also be referred to as a processor, which may include one or more processing units, for example, may include an application processor (application processor, AP), a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), controller, memory, digital signal processor (digital signal processor, DSP), baseband processor, and/or neural-network processing unit (neural-network processing unit, NPU), etc. Wherein, different processing units may be independent devices, or may be integrated in one or more processors. For example, the air pump control unit 203 may be an independent device, or may be integrated with the MCU 202 in one or more processors.

A controller can be the nerve center and command center of an electronic device. The controller can generate an operation control signal according to the instruction operation code and timing signal, and complete the control of fetching and executing instructions.

Memory may also be provided in the processor for storing instructions and data. In some embodiments, the memory in the processor is a cache memory. This memory can hold instructions or data that the processor has just used or recycled. If the processor needs to use the instruction or data again, it can be called directly from the memory. Repeated access is avoided, and the waiting time of the processor is reduced, thereby improving the efficiency of the system.

In some embodiments, the processor may include one or more interfaces. The interface may include an integrated circuit (inter-integrated circuit, I2C) interface, an integrated circuit built-in audio (inter-integrated circuitsound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous receiver (universal asynchronous receiver) interface /transmitter, UART) interface, mobile industry processor interface (MIPI), general-purpose input/output (GPIO) interface, subscriber identity module (SIM) interface, and/or Universal serial bus (universal serial bus, USB) interface, etc.

The storage unit 202 may also be referred to as an internal memory, and may be used to store executable program codes of the electronic device, where the executable program codes include instructions. The MCU 201 executes various functional applications and data processing of the electronic device by executing the instructions stored in the storage unit 202 . For example, in this embodiment of the present application, the MCU 201 may, by executing an instruction stored in the storage unit 202 , after receiving an operation of measuring blood pressure, as a response to the operation, execute a corresponding event, for example, according to the storage unit 202 The stored historical measurement data determines the possible pressure segment of the pulse wave, confirms the static pressure interval measured this time, and calculates the corresponding inflation rate, so as to realize the control of the pressure increase rate of the airbag 205 by the air pump control unit 203 . The storage unit 202 may include a storage program area and a storage data area. The storage program area can store an operating system, an application program required for at least one function (such as a sound playback function, an image playback function, etc.), and the like. The storage data area can store data (such as pressure signals, etc.) created during the use of the electronic device. In addition, the storage unit 202 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, universal flash storage (UFS), and the like.

It can be understood that, the connection relationship between the modules shown in this embodiment is only a schematic illustration, and does not constitute a structural limitation of the electronic device. In other embodiments, the electronic device may also adopt different connection manners in the foregoing embodiments, or a combination of multiple connection manners.

In addition, the structure illustrated in this embodiment does not constitute a specific limitation on the electronic device. In other embodiments, the electronic device may include more or fewer components than shown, or some components may be combined, or some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

For example, the electronic device may also include one or more of the following modules: a charging management module for receiving charging input from a charger. The charger may be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module may receive charging input from the wired charger through a USB interface. In some wireless charging embodiments, the charging management module may receive wireless charging input through a wireless charging coil of the electronic device. While the charging management module charges the battery of the electronic device, it can also supply power to the electronic device through the power management module.

The power management module is used to connect the battery of the electronic device. The power management module receives input from the battery and/or charging management module, and supplies power to the MCU 201, the storage unit 202, the air pump control unit, and the like. The power management module can also be used to monitor parameters such as battery capacity, battery cycle times, battery health status (leakage, impedance). In some other embodiments, the power management module may also be provided in the processor. In other embodiments, the power management module and the charging management module may also be provided in the same device.

The electronic device may also have wireless communication capabilities. Its wireless communication function can be realized by antenna 1, antenna 2, mobile communication module, wireless communication module, modulation and demodulation processor and baseband processor.

Antenna 1 and Antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in an electronic device can be used to cover a single or multiple communication frequency bands. Different antennas can also be reused to improve antenna utilization. For example, the antenna 1 can be multiplexed as a diversity antenna of the wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module can provide solutions for wireless communication including 2G/3G/4G/5G applied to electronic devices. The mobile communication module may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA) and the like. The mobile communication module can receive electromagnetic waves by the antenna 1, filter and amplify the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation. The mobile communication module can also amplify the signal modulated by the modulation and demodulation processor, and then turn it into electromagnetic waves to radiate out through the antenna 1 . In some embodiments, at least part of the functional modules of the mobile communication module may be provided in the processor. In some embodiments, at least part of the functional modules of the mobile communication module may be provided in the same device as at least part of the modules of the processor.

The modem processor may include a modulator and a demodulator. Wherein, the modulator is used to modulate the low frequency baseband signal to be sent into a medium and high frequency signal. The demodulator is used to demodulate the received electromagnetic wave signal into a low frequency baseband signal. Then the demodulator transmits the demodulated low-frequency baseband signal to the baseband processor for processing. The low frequency baseband signal is processed by the baseband processor and passed to the application processor. The application processor can output a sound signal through an audio device (not limited to a speaker, a receiver, etc.) of the electronic device, or display an image or video through a display screen of the electronic device. In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be independent of the processor, and be provided in the same device as the mobile communication module or other functional modules.

The wireless communication module can provide applications on electronic devices including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), bluetooth (BT), global navigation satellite systems (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), near field communication technology (near field communication, NFC), infrared technology (infrared, IR) and other wireless communication solutions. The wireless communication module may be one or more devices integrating at least one communication processing module. The wireless communication module receives electromagnetic waves via the antenna 2, frequency modulates and filters the electromagnetic wave signals, and sends the processed signals to the processor. The wireless communication module can also receive the signal to be sent from the processor, perform frequency modulation on it, amplify it, and convert it into electromagnetic waves for radiation through the antenna 2 .

In some embodiments, the antenna 1 of the electronic device is coupled with the mobile communication module, and the antenna 2 is coupled with the wireless communication module, so that the electronic device can communicate with the network and other devices through wireless communication technology. The wireless communication technology may include global system for mobile communications (GSM), general packet radio service (GPRS), code division multiple access (CDMA), wideband code Division multiple access (wideband code division multiple access, WCDMA), time division code division multiple access (time-division code division multiple access, TD-SCDMA), long term evolution (long term evolution, LTE), BT, GNSS, WLAN, NFC, FM, and/or IR technology, etc. The GNSS may include a global positioning system (GPS), a global navigation satellite system (GLONASS), a Beidou navigation satellite system (BDS), a quasi-zenith satellite system (quasi-zenith). satellite system, QZSS) and/or satellite based augmentation systems (SBAS).

The electronic device may also have a display function. For example, display functions can be implemented through GPUs, display screens, and application processors. The GPU is a microprocessor for image processing, which connects the display screen and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor may include one or more GPUs that execute program instructions to generate or alter display information.

The display screen is used to display images, videos, etc. The display includes a display panel. The display panel can be a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode). diode, AMOLED), flexible light-emitting diode (flex light-emitting diode, FLED), Miniled, MicroLed, Micro-oLed, quantum dot light emitting diode (quantum dot light emitting diodes, QLED) and so on. In some embodiments, the electronic device may include 1 or N display screens, where N is a positive integer greater than 1.

The electronic device may also have a shooting function, for example, it can realize the shooting function through an ISP, a camera, a video codec, a GPU, a display screen, and an application processor.

The ISP is used to process the data fed back by the camera. Cameras are used to capture still images or video. The object is projected through the lens to generate an optical image onto the photosensitive element. The photosensitive element converts the optical signal into an electrical signal, and then transmits the electrical signal to the ISP to convert it into a digital image signal. The ISP outputs the digital image signal to the DSP for processing. DSP converts digital image signals into standard RGB, YUV and other formats of image signals. In some embodiments, the electronic device may include 1 or N cameras, where N is a positive integer greater than 1.

A digital signal processor is used to process digital signals, in addition to processing digital image signals, it can also process other digital signals. For example, when the electronic device selects the frequency point, the digital signal processor is used to perform Fourier transform on the frequency point energy, etc.

Video codecs are used to compress or decompress digital video. An electronic device may support one or more video codecs. In this way, the electronic device can play or record videos in various encoding formats, for example, moving picture experts group (MPEG) 1, MPEG2, MPEG3, MPEG4 and so on.

The NPU is a neural-network (NN) computing processor. By drawing on the structure of biological neural networks, such as the transfer mode between neurons in the human brain, it can quickly process the input information, and can continuously learn by itself. Through the NPU, applications such as intelligent cognition of electronic devices can be realized, such as image recognition, face recognition, speech recognition, text understanding, etc.

The electronic device may further include an external memory interface, which can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the electronic device. The external memory card communicates with the processor through the external memory interface to realize the data storage function. For example to save files like music, video etc in external memory card.

The electronic device can also implement audio functions, for example, audio functions can be implemented through audio modules, speakers, receivers, microphones, headphone jacks, and application processors. Such as music playback, recording, etc.

In addition to the above-mentioned pressure sensor 206, the electronic device may also include one or more of the following sensors: a gyroscope sensor may be used to determine the motion attitude of the electronic device. In some embodiments, the angular velocity of the electronic device about three axes (ie, the x, y, and z axes) can be determined by a gyro sensor. A gyro sensor can be used for image stabilization. The gyroscope sensor can also be used for navigation, somatosensory game scenes. Pressure sensors are used to measure air pressure. In some embodiments, the electronic device calculates the altitude from the air pressure value measured by the pressure sensor to assist in positioning and navigation. Magnetic sensors include Hall sensors. The electronic device can detect the opening and closing of the flip holster using a magnetic sensor. The acceleration sensor can detect the acceleration of the electronic device in all directions (generally three axes). The magnitude and direction of gravity can be detected when the electronic device is stationary. It can also be used to identify the posture of electronic devices, and can be used in applications such as horizontal and vertical screen switching, pedometers, etc. Distance sensor for measuring distance. Electronic devices can measure distances by infrared or laser. Proximity light sensors may include, for example, light emitting diodes (LEDs) and light detectors, such as photodiodes. The light emitting diodes may be infrared light emitting diodes. Electronic devices emit infrared light outward through light-emitting diodes. Electronic devices use photodiodes to detect reflected infrared light from nearby objects. When sufficient reflected light is detected, it can be determined that there is an object in the vicinity of the electronic device. When insufficient reflected light is detected, the electronic device can determine that there is no object in the vicinity of the electronic device. The ambient light sensor is used to sense ambient light brightness. The electronic device can adaptively adjust the display brightness according to the perceived ambient light brightness. The fingerprint sensor is used to collect fingerprints. Electronic devices can use the collected fingerprint characteristics to unlock fingerprints, access application locks, take photos with fingerprints, and answer incoming calls with fingerprints. A temperature sensor is used to detect temperature. Touch sensor, also known as "touch panel". The touch sensor can be arranged on the display screen, and the touch screen is composed of the touch sensor and the display screen, also called "touch screen". A touch sensor is used to detect touch operations on or near it. The touch sensor can pass the detected touch operation to the application processor to determine the type of touch event. Visual output associated with touch operations can be provided through the display. In other embodiments, the touch sensor can also be disposed on the surface of the electronic device, which is different from the position of the display screen. Bone conduction sensors can acquire vibration signals. In some embodiments, the bone conduction sensor can acquire the vibration signal of the vibrating bone mass of the human voice. The bone conduction sensor can also contact the human pulse and receive the blood pressure beating signal. In some embodiments, the bone conduction sensor can also be disposed in the earphone, combined with the bone conduction earphone. The audio module can analyze the voice signal based on the vibration signal of the vibrational bone mass of the voice part obtained by the bone conduction sensor, so as to realize the voice function. The application processor can analyze the heart rate information based on the blood pressure beat signal obtained by the bone conduction sensor, so as to realize the function of heart rate detection.

The electronic device may further include an indicator, such as an indicator light, which may be used to indicate the charging state, the change of the power, and may also be used to indicate a message, a missed call, a notification, and the like. The SIM card interface is used to connect the SIM card. The SIM card can be inserted into the SIM card interface or pulled out from the SIM card interface to achieve contact and separation with the electronic device. The electronic device can support 1 or N SIM card interfaces, where N is a positive integer greater than 1.

The methods in the following embodiments can all be implemented in an electronic device having the above-mentioned hardware structure.

The blood pressure measurement method provided by the embodiments of the present application can quickly and accurately measure the blood pressure. The method can be applied to electronic devices. In the following embodiments of the present application, the electronic device is a blood pressure watch as an example for introduction. This method can be achieved by the following steps:

When the blood pressure measurement starts, the air pump of the blood pressure watch begins to inflate the air bag, and the pressure value of the air bag starts to rise linearly from 0mmHg. Before the pulse wave signal appears, the air pump inflates the air bag at a large inflation rate.

It can be understood that the greater the inflation rate, the greater the rate of pressure increase of the airbag. Therefore, before the pulse wave signal appears, the air pump inflates the air bag at a higher inflation rate, so that the air bag can be boosted at a faster pressure increasing rate, so that the pulse wave signal can appear quickly.

When the pulse wave signal appears, the inflation rate of the air pump is reduced, and the air pump resumes inflating the air bag at the normal inflation rate, so as to obtain the pulse wave signal and static pressure signal accurately.

Further, after the pulse wave signal appears, in the pressure range where the characteristic points of the pulse wave signal may appear, continue to reduce the inflation rate of the air pump, so that the air bag can be boosted at a lower rate, so that the blood pressure watch can be more accurate. Extract the characteristic points of the pulse wave signal and the pressure value of the air bag when the characteristic points appear, until all the characteristic points that need to be extracted are all extracted, the air pump is deflated, and the blood pressure measurement is completed.

It should be noted that, in the process of blood pressure measurement, with the pressure increase of the blood pressure watch airbag, the pulse wave signal detected by the blood pressure watch will continuously appear in the last segment of the linear pressure increase of the blood pressure watch. For the same user, the pulse wave signal generally does not change drastically, that is to say, the pressure value of the air bag when the pulse wave signal appears and the pressure value of the air bag when all the feature points in the pulse wave signal are extracted are generally not There are drastic changes. Therefore, after the pulse wave signal appears, reducing the boosting rate of the airbag in the blood pressure watch to prolong the detection time of the pulse wave signal can effectively improve the extraction of feature point information in the pulse wave signal.

The method provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings. With reference to FIG. 2 , please refer to FIG. 3 , which is a schematic flowchart of a blood pressure measurement method provided by an embodiment of the present application. As shown in FIG. 3, the method may include the following S301-S305.

S301. The electronic device controls the air pump to inflate the airbag at a first inflation rate.

Exemplarily, referring to FIG. 2 , after the blood pressure watch receives the operation of measuring the blood pressure of the user, the MCU may send an instruction to the air pump control unit, so that the air pump control unit controls the air pump to inflate the airbag at the first inflation rate.

Because the pulse wave signal appears in the last segment of the linear boost of the blood pressure watch. Therefore, when the blood pressure is started to be measured, the air pump can be controlled to inflate the air bag with a relatively large inflation rate, such as the above-mentioned first inflation rate, so that the air bag can be rapidly boosted.

S302 , in the process of controlling the air pump to inflate the airbag at the first inflation rate, the electronic device determines whether the pulse wave signal appears.

The electronic device may perform the following S303 when determining that the pulse wave signal is present. When it is determined that the pulse wave signal does not appear, the air pump may continue to be controlled to inflate the airbag at the first inflation rate, and the above-mentioned S301 may be continued.

Exemplarily, with reference to FIG. 2 , the pressure sensor in the blood pressure watch can detect the pressure value of the air bag in real time and transmit it to the MCU. The MCU can determine whether the pulse wave signal appears according to the real-time detected pressure value of the airbag.

For example, in a possible implementation manner, the MCU can determine the relationship between the pressure value of the airbag detected in real time and the pressure threshold, and if the MCU determines that the pressure value of the airbag at the current moment is greater than the pressure threshold, it can determine that the pulse wave signal appears. If the MCU determines that the pressure value of the airbag at the current moment is less than the pressure threshold, it can be determined that the pulse wave signal does not appear.

For another example, in another possible implementation manner, the MCU can obtain a pressure signal according to the pressure value of the airbag detected in real time, such as the original signal shown in FIG. It is judged whether the pulse wave signal can be extracted from the original signal to judge whether the pulse wave signal appears. If the MCU determines that a pulse wave signal can be extracted from the detected original signal, it can be determined that the pulse wave signal is present. If the MCU determines that the pulse wave signal cannot be extracted from the detected original signal, it can be determined that the pulse wave signal does not appear.

It should be noted that in the actual blood pressure measurement process, within a period of time when the pulse wave signal begins to appear, the signal amplitude is very small and the signal-to-noise ratio is very low, which is not enough to provide effective measurement information. It is believed that the pulse wave signal does not appear. In order to accurately determine the occurrence of the pulse wave signal that can provide effective information, the pulse wave signal extracted in the embodiment of the present application may refer to the signal whose amplitude reaches the amplitude threshold can be extracted. For example, when the air bag is boosted to 40mmHg, the pulse wave signal begins to appear, but the amplitude of the signal does not reach the amplitude threshold, so it can still be considered that the pulse wave signal does not appear, and the air bag continues to be inflated at the first inflation rate. The air bag pressure continues to rise, the pulse wave signal begins to appear, and the amplitude of the signal reaches the amplitude threshold, then the pulse wave signal is considered to have appeared this time, and the air pump is controlled to inflate the air bag at the second inflation rate.

S303 , controlling the air pump to inflate the airbag at a second inflation rate, where the second inflation rate is less than the first inflation rate.

Exemplarily, with reference to FIG. 2 , the MCU may determine whether a pulse wave signal appears in the pulse wave signal according to the pressure value of the airbag detected in real time. When it is determined that the pulse wave signal appears, the blood pressure watch can control the air pump to inflate the air bag at the second inflation rate, so that the air bag is boosted at a normal pressure increase rate. That is, the rapid boosting of the airbag is terminated, and the airbag is inflated at a normal boosting rate to ensure that the pulse wave signal can be accurately extracted.

S304, the electronic device acquires the pulse wave signal and the static pressure signal according to the pressure signal detected after the airbag is inflated at the second inflation rate.

For example, after the blood pressure watch controls the air pump to inflate the air bag at the second inflation rate, the MCU can continue to detect the pressure value of the air bag, and thereby obtain the pressure signal. In addition, after the rapid boosting is completed, the airbag can be inflated at a constant speed at the second inflation rate, and then the static pressure in the airbag will increase linearly. The MCU can separate the fluctuating pulse wave signal from the linearly rising static pressure signal, so that the pulse wave signal and the static pressure signal can be obtained.

S305 , the electronic device determines the blood pressure value of the user according to at least one feature point in the pulse wave signal and the sum static pressure signal corresponding to the feature point.

Among them, the pulse wave signal includes a large number of waveform features. The waveform feature can reflect the feature points of the pulse wave signal. By collecting and analyzing the feature points of the pulse wave signal, and referring to the static pressure signal, the user's blood pressure values (eg, diastolic blood pressure and systolic blood pressure) can be obtained.

The blood pressure measurement method provided by the embodiments of the present application can effectively shorten the blood pressure measurement time by rapidly increasing the pressure in the pressure segment before the pulse wave signal appears. At the same time, the pressure segment after the pulse wave signal appears is boosted at a normal speed to prolong the detection time of the pulse wave signal, which can effectively improve the accuracy of extracting the feature points of the pulse wave signal, thereby improving the accuracy of blood pressure measurement. .

Another embodiment of the present application provides a blood pressure measurement method, which can be applied to an electronic device. The method determines a pressure threshold and at least one pressure interval according to historical measurement data, and the electronic device can adjust the pressure increase rate of the airbag according to the pressure threshold and at least one pressure interval, so as to shorten the time-consuming process of blood pressure measurement, thereby improving the accuracy of blood pressure measurement .

The blood pressure measurement method provided by the embodiment of the present application will be described in detail below with reference to FIG. 4 and FIG. 5 .

It can be understood that the electronic device (eg, blood pressure watch) involved in the embodiments of the present application can be worn on the wrist of the user for a long time, and therefore, the blood pressure watch has user-specific characteristics. However, the fluctuation of blood pressure of the same user in a short period of time is not large. It can be inferred by recording the pulse wave signal of the user in the past period of time or the historical blood pressure measurement data (that is, historical measurement data) of N times (N greater than or equal to 1). The possible pressure value of the airbag when the pulse wave signal appears during this measurement.

Similarly, for the same user, the pressure value of the air bag is relatively fixed when the characteristic points of the pulse wave signal appear in a period of time. Therefore, the air bag pressure value when the pulse wave characteristic points in the historical measurement data appear can also be The pressure value is used as a reference to infer the possible pressure value of the airbag when the characteristic point of the pulse wave signal appears in this measurement process.

In this embodiment, it is possible to estimate the possible pressure value of the air bag when the pulse wave signal appears in the current measurement process, and the possible pressure value of the air bag when the characteristic point of the pulse wave signal appears, to calculate the pressure increase rate of the air bag. Adjustment. This method may be referred to as the historical data method.

Among them, the estimated pressure value of the airbag when the pulse wave signal may appear may be called the pressure threshold, and the set of possible pressure values of the airbag when the estimated characteristic point of the pulse wave signal appears may be called the pressure interval.

Illustratively, taking the electronic device as a blood pressure watch as an example, the process of determining the pressure threshold and the pressure interval will be described.

In one aspect, the electronic device can determine the pressure threshold based on historical measurement data. Wherein, the historical measurement data may include: the pressure value of the air bag when the pulse wave signal occurs during multiple blood pressure measurement processes. The pressure threshold may be the minimum pressure value of the airbag when the pulse wave signal occurs during the multiple blood pressure measurement processes in the history. For example, the blood pressure watch may store the pressure value of the airbag when the pulse wave signal occurs during the blood pressure measurement of N times (N is greater than or equal to 1) in history. Since the blood pressure value of the same user at different times fluctuates in a certain range, the pressure value of the air bag will also change when the pulse wave signal appears during the N times of blood pressure measurement in history. The minimum pressure value of the airbag when the pulse wave signal appears during the above-mentioned historical N times of blood pressure measurement may be used as the above-mentioned pressure threshold. That is to say, in this blood pressure measurement process, when the pressure value of the air bag is greater than the above-mentioned pressure threshold, the pulse wave signal may appear, or appear in a very short time afterward.

Exemplarily, with reference to FIG. 4 , a schematic diagram of the correspondence between a static pressure signal and a pulse wave signal during a blood pressure measurement process provided by an embodiment of the present application.

As shown in Fig. 4, it is assumed that according to the historical measurement data, the minimum pressure value of the airbag when the pulse wave signal appears is P1. Then, when the pressure value of the airbag reaches P1, it means that the pulse wave signal has appeared in this blood pressure measurement, or will appear in a short time. As shown in FIG. 4 , when the pulse wave signal reaches the point M1, it means that the pulse wave signal has appeared, and M1 is shortly after the balloon pressure reaches P1. That is to say, the P1 can be used as the pressure threshold for the current blood pressure measurement.

For example, in the blood pressure measurement data recorded three times (ie, N=3) in the history, the pressure values of the balloon when the pulse wave signal appears are 105mmHg, 108mmHg and 102mmHg respectively, then 102mmHg can be used as the pressure threshold.

On the other hand, the electronic device may determine at least one pressure interval based on historical measurement data. Wherein, the historical measurement data may include: the pressure value of the air bag when the characteristic point of the pulse wave signal appears in the multiple blood pressure measurement process. The at least one pressure interval may be a set of pressure values of the airbag when the characteristic point of the pulse wave signal occurs in the history of multiple blood pressure measurement processes. For example, the blood pressure watch can also store the pressure value of the air bag when the characteristic point of each pulse wave signal occurs during the N times (N is greater than or equal to 1) in the history of blood pressure measurement. The characteristic points of the pulse wave signal may include an envelope peak value, an envelope inflection point, a maximum envelope slope point, and the like. For general users, the envelope of the pulse wave signal presents a unimodal shape that first increases and then decreases. The segment where the pulse wave envelope continues to increase is called the rising segment, and the segment where the pulse wave envelope continues to decrease is called the descending segment. peak. In addition, the ascending segment and descending segment also contain other feature points, such as envelope inflection points, etc.

It can be understood that the characteristic points of the pulse wave signal are obtained by analyzing the entire pulse wave signal. Therefore, it is impossible to determine whether the characteristic points of the pulse wave signal appear through real-time detection of the pulse wave signal. However, for the same user, the pressure value of the corresponding air bag is relatively fixed when the characteristic points of the pulse wave signal appear within a period of time. Therefore, for a certain feature point, the possible pressure range of the airbag when the feature point appears can be obtained through historical measurement data. In this way, whether the feature point will appear can be determined according to whether the pressure value of the airbag at the current moment is within the interval (ie, whether the current pressure value of the airbag is greater than the minimum value of the interval and less than the maximum value of the interval).

It should be noted that, in the process of blood pressure measurement, multiple feature points need to be extracted from the pulse wave signal. And in the process of multiple measurements, the pressure value of the airbag will also fluctuate in a small range when the same feature point appears. Therefore, the pressure value of the airbag when each feature point appears can form an interval corresponding to the feature point, and will be different. The range of the pressure value of the air bag when the feature point may appear can be obtained by taking the union of the interval corresponding to the feature point in the secondary measurement process. In this embodiment, the range of the pressure value of the airbag when the feature point may appear is called the pressure interval. When the pressure value of the airbag is within the pressure range, the probability of the feature point appearing is relatively high. Similarly, pressure intervals corresponding to multiple feature points can be obtained.

Referring to FIG. 4 , it is assumed that the characteristic points of the pulse wave signal include M2 and M3 in FIG. 4 . According to the historical measurement data, in the history of N times of blood pressure measurement, the minimum value of the pressure value of the air bag when M2 occurs is P2, and the maximum value of the pressure value of the air bag when M2 occurs is P2'. Therefore, the pressure interval corresponding to M2 can be is [P2,P2']. Similarly, according to the historical measurement data, the pressure interval corresponding to M3 can be [P3, P3']. Then, the pressure interval corresponding to the characteristic points M2 and M3 of the pulse wave signal can be [P2, P2']∪[P3, P3']. That is to say, in this blood pressure measurement process, when the pressure value of the air bag is within the pressure range [P2, P2']∪[P3, P3'], the probability of M2 and M3 appearing is relatively high.

It should be noted that the pressure intervals corresponding to different feature points may or may not intersect. In this embodiment, a union of pressure intervals corresponding to multiple feature points of the pulse wave signal may be taken to obtain the pressure interval of the feature points to be extracted in the pulse wave signal. The number of finally obtained pressure intervals may be one or more.

For example, the multiple feature points to be extracted include: feature point A, feature point B, and feature point C. In the recorded historical measurement data, the pressure interval corresponding to feature point A is [A1, A2], the pressure interval corresponding to feature point B is [B1, B2], and the pressure interval corresponding to feature point C is [C1, C2]. It is assumed that A1<B1<A2<B2<C1<C2, that is, the interval of the pressure value of the airbag when the feature point A appears and the interval of the pressure value of the airbag when the feature point B appears intersect. Then, taking the union of the pressure intervals corresponding to the feature point A, the feature point B and the feature point C, the pressure interval in the obtained pulse wave signal that needs to extract the feature point can be [A1,B2]∪[C1,C2]. That is to say, when the pressure value of the airbag is within the pressure range of [A1,B2]∪[C1,C2], the probability of feature point A, feature point B and feature point C appearing is relatively high.

Please refer to FIG. 5 , which is a schematic flowchart of a blood pressure measurement method according to another embodiment of the present application. The blood pressure measurement method provided by the embodiments of the present application may include: S501-S508.

S501. The electronic device determines, according to historical measurement data, that the air pump can be controlled to inflate the airbag at a first inflation rate.

Exemplarily, the MCU of the blood pressure watch may determine whether the air pump can be controlled to inflate the airbag at the first inflation rate by judging whether the historical static pressure interval is stable according to historical measurement data.

If the MCU judges that the historical static pressure range is stable, it means that in this blood pressure measurement, the blood pressure watch can more accurately predict the static pressure value (such as the pressure threshold) when the pulse wave signal appears based on the historical measurement data, then the blood pressure watch will The air pump can be controlled to inflate the airbag at the first inflation rate, and the following S502-S508 can be performed.

If the historical static pressure interval is unstable, it can be considered that during the blood pressure measurement, it is difficult for the blood pressure watch to accurately predict the static pressure value (such as the pressure threshold) when the pulse wave signal appears, then the blood pressure watch can control the air pump to second The inflation rate (that is, the normal inflation rate) is used to inflate the airbag, that is, the blood pressure is selected to be measured according to the normal boosting rate until all the characteristic points of the pulse wave signal are extracted.

In the embodiment of the present application, whether the historical static pressure interval is stable can be determined by the following method. Exemplarily, please refer to FIG. 6 , the MCU can determine whether the historical static pressure interval is stable according to the historical measurement data stored in the storage unit. Wherein, the historical measurement data may include: the pressure value of the air bag when the pulse wave signal occurs during multiple blood pressure measurement processes. For example, the blood pressure watch can determine that the historical static pressure interval is stable when the difference between the pressure values of the airbag when the pulse wave signal occurs in any two blood pressure measurement processes is less than the change threshold in the historical measurement data. In any two blood pressure measurement processes, the difference between the pressure values of the air bag when the pulse wave signal appears is greater than the change threshold, and it is determined that the historical static pressure region is not stable. Wherein, the variation threshold (for example, 10 mmHg) can be preset in the blood pressure watch.

In addition, in some embodiments, after determining that the historical static pressure interval is stable, the blood pressure watch may determine the pressure threshold and the pressure interval according to the historical measurement data stored in the storage unit. For the specific description of determining the pressure threshold and the pressure interval, refer to the description of the corresponding content in the foregoing embodiment, and details are not repeated here. Of course, in other embodiments, the blood pressure watch may also determine the pressure threshold and the pressure interval before judging whether the historical static pressure interval is stable, which is not specifically limited in this embodiment.

S502, the electronic device controls the air pump to inflate the airbag at a first inflation rate.

After starting to measure the blood pressure, the air pump may be controlled to inflate the air bag at the first inflation rate. The first inflation rate may be a relatively high rate, so as to control the air bag to increase the pressure at a faster rate before the pulse wave signal appears, so as to shorten the time for measuring the blood pressure.

For example, with reference to FIG. 6 , the MCU may send a first instruction to the air pump control unit, where the first instruction is used to instruct the air pump control unit to control the air pump to inflate the airbag at a first inflation rate. In response to the first instruction, the air pump control unit may output an instruction to inflate at the first inflation rate to the air pump. The air pump can then inflate the airbag at the first inflation rate (ie, perform S601).

It should be noted that, in the embodiment of the present application, the first inflation rate may be preset, or may be obtained by calculation in combination with historical measurement data.

Exemplarily, the MCU may determine the first inflation rate according to a pressure threshold and a preset boost time. The boost time is the time required for the pressure value of the airbag to rise from 0 to a pressure threshold value. For example, the MCU can calculate and obtain the boosting rate of the airbag according to the pressure threshold and the preset boosting time, and then obtain the inflation rate, such as the first inflation rate, according to the pressure threshold and the preset boosting time.

It can be understood that in the process of blood pressure measurement, for a user with a higher blood pressure, the pulse wave signal appears for a longer time, and the boost time before the pulse wave signal appears occupies most of the entire blood pressure measurement process. In order to make the blood pressure measurement time-consuming for different users relatively short, in the embodiment of the present application, the boosting time of the rapid boosting process can be set to be fixed. The larger the pressure, the larger the corresponding boosting rate, which means that the first inflation rate also increases. Correspondingly, the smaller the first pressure threshold is, the lower the boosting rate can be, and the lower the first inflation rate during the rapid boosting process. In this way, for users with relatively high blood pressure who require more frequent blood pressure measurement, it can also be ensured that the user's blood pressure value can be accurately measured in a short period of time.

It should be noted that, in this embodiment of the present application, the determination of whether the historical static pressure interval is stable, the determination of the pressure threshold, and the determination of the first inflation rate according to the pressure threshold may be performed after receiving the operation of the user's current blood pressure measurement, or It may have been done prior to the operation of receiving the user's blood pressure measurement. This application does not limit this.

During the process that the electronic device controls the air pump to inflate the airbag at the first inflation rate, the electronic device can determine whether the pulse wave signal appears to determine whether it is necessary to end the rapid boosting stage and restore the airbag to the normal boosting rate, so that the electronic device can Accurately detect the pulse wave signal. In this embodiment, the electronic device may implement S503a or S503b to determine whether the pulse wave signal appears.

S503a, in the process of controlling the air pump to inflate the airbag at the first inflation rate, the electronic device determines whether the pressure value of the airbag at the current moment is greater than the pressure threshold.

Wherein, the above-mentioned pressure threshold may be determined according to historical measurement data. The historical measurement data may include: the pressure value of the air bag when the pulse wave signal occurs during multiple blood pressure measurement processes. The pressure threshold may be the minimum pressure value of the airbag when the pulse wave signal occurs during the multiple blood pressure measurement processes in the history.

Exemplarily, referring to FIG. 6 , when the blood pressure watch controls the air pump to inflate the air bag at the first inflation rate, the pressure sensor can detect the pressure value of the air bag in real time, and transmit the detected pressure value of the air bag to the MCU. Then, the MCU can determine whether the pressure value of the airbag at the current moment is greater than the pressure threshold value. When the pressure value of the airbag at the current time is greater than the above-mentioned pressure threshold, the electronic device can determine that a pulse wave signal has appeared, or a pulse wave signal will appear in a short time after the current time, and S504 can be executed at this time. Conversely, when the pressure value of the airbag at the current moment is less than the pressure threshold, the electronic device can determine that the pulse wave signal does not appear, and at this time, the electronic device can continue to control the air pump to inflate the airbag at the first inflation rate, that is, continue to execute the above S502.

S503b, in the process of controlling the air pump to inflate the airbag at the first inflation rate, the electronic device detects the pressure signal of the airbag, and determines whether a pulse wave signal can be extracted from the detected pressure signal.

When the pulse wave signal can be extracted from the detected pressure signal, the electronic device determines that the pulse wave signal appears, and executes the following S504;

When the pulse wave signal cannot be extracted from the detected pressure signal, the electronic device determines that the pulse wave signal does not appear, and returns to execute S502.

Exemplarily, as shown in FIG. 6 , when the MCU sends the first instruction to the air pump control unit to control the air pump to inflate the air bag at the first inflation rate, the pressure sensor can detect the pressure value in the air bag in real time, and the pressure value is real-time detected. feedback to the MCU. The MCU can obtain the pressure signal of the airbag according to the pressure value of the airbag fed back by the pressure sensor in real time, and then determine whether the pulse wave signal appears. When the pulse wave signal appears, the MCU can control the electronic device to continue to perform the following S504, and when it is confirmed that the pulse wave signal does not appear, the MCU can continue to inflate the air bag at the first inflation rate, that is, return to the above S502.

It should be noted that, as to whether the pulse wave signal can be extracted, in this embodiment of the present application, the pulse wave signal can provide valid measurement information as the criterion. For example, it is similar to the description in the embodiment S302 shown in FIG. 3 , and details are not repeated here.

S504, the electronic device controls the air pump to inflate the airbag at a second inflation rate, where the second inflation rate is less than the first inflation rate.

It can be seen that, after the pulse wave signal appears, in order to extract the pulse wave signal more accurately, the blood pressure watch can control the air pump to inflate the air bag at the second inflation rate. Wherein, the second inflation rate is less than the first inflation rate. Therefore, after the pulse wave signal appears, the rapid boosting phase in which the airbag is inflated at the first inflation rate is ended, and the normal boosting phase in which the airbag is inflated at the second inflation rate is changed. In this way, the blood pressure watch can control the air bag to rapidly boost the pressure before the pulse wave signal appears, and shorten the measurement time before the pulse wave signal appears. At the same time, the electronic device can also control the air bag to increase the pressure at a normal rate after the pulse wave signal appears, which is more conducive to accurately extracting the pulse wave signal.

Exemplarily, with reference to FIG. 6 , the MCU may send a second instruction to the air pump control unit, where the second instruction is used to instruct the air pump control unit to control the air pump to inflate the airbag at a second inflation rate. In response to the second command, the air pump control unit may output a command to inflate the air pump at the second inflation rate. The air pump can then inflate the airbag at the second inflation rate (ie, perform S602).

S505, after the electronic device controls the air pump to inflate the airbag at the second inflation rate, detects the pressure value of the airbag.

Similar to the description in S503a of this embodiment, with reference to FIG. 6 , after the electronic device controls the air pump to inflate the airbag at the second inflation rate, the pressure sensor can detect the pressure value of the airbag in real time, and use the detected pressure value of the airbag to The value is transmitted to the MCU.

S506. For each pressure interval in the at least one pressure interval, the electronic device starts from the pressure value of the air bag being equal to the minimum value of the pressure interval, and controls the air pump to inflate the air bag at a third inflation rate until the pressure value of the air bag is equal to the maximum value of the pressure interval. value, the air pump is re-controlled to inflate the air bag at the second inflation rate. Wherein, the third inflation rate is less than the second inflation rate.

It can be understood that, for each pressure interval in the at least one pressure interval, when the pressure value of the air bag at the current moment is within the pressure interval, the pressure signal of the air bag has a high probability to extract the characteristic points of the pulse wave signal. . Exemplarily, when the pressure value of the airbag is within the pressure range, the MCU may send a third instruction to the air pump control unit, where the third instruction is used to instruct the air pump control unit to control the air pump to inflate the airbag at a third inflation rate. In response to the third command, the air pump control unit may output a command to inflate the air pump at the third inflation rate. The air pump can then inflate the airbag at the third inflation rate (ie, perform S603). Wherein, the third inflation rate is less than the second inflation rate. That is to say, when it is determined that the pressure signal of the air bag may contain the characteristic points of the pulse wave signal, the blood pressure watch controls the air bag to increase the pressure at a rate less than the normal pressure increase rate, which can further prolong the time of feature point extraction, so as to improve the characteristic point Extraction accuracy.

Exemplarily, as shown in FIG. 4 , it is assumed that at least one pressure interval determined by the blood pressure watch according to historical data includes [P2, P2']∪[P3, P3']. When the pressure value of the air bag is less than P1, as shown in signal 1 in Figure 4, the pulse wave signal does not appear, and the blood pressure watch controls the air bag to rapidly increase the pressure. When the pressure value of the air bag is greater than P1, as shown in signal 2 in Figure 4, the pulse wave signal appears (such as the appearance of M1 of the pulse wave signal), and the blood pressure watch controls the air bag to start to increase the pressure at a normal pressure increase rate. When the pressure value of the air bag is greater than P1 and less than P2 (eg, signal 2A), the characteristic point M2 has not yet appeared, and the blood pressure watch can control the air bag to increase the pressure at a normal rate. When the pressure value of the air bag is greater than P2 and less than P2' (such as signal 2B), the feature point M2 has a greater probability of appearing, then the blood pressure watch can control the air bag to increase the pressure at a slower rate. When the pressure value of the air bag is greater than P2' and less than P3, the feature point M2 has been extracted, and the blood pressure watch controls the rate at which the air bag returns to normal and increases the pressure. Similarly, when the pressure value of the air bag is greater than P3 and less than P3', the feature point M3 has a greater chance of appearing, and the blood pressure watch can control the air bag to increase the pressure at a slower rate. Repeat this until all required feature points have been extracted.

It should be noted that, in the above example, when the pressure value of the airbag is within the pressure range, the airbag is controlled to increase the pressure at a rate lower than the normal pressure increase rate, so as to improve the accuracy of feature point extraction. In another embodiment, when the pressure value of the airbag is within the pressure range, the electronic device can also control the airbag not to boost the pressure, that is, the boosting rate is 0. In this embodiment, the electronic device can acquire the time interval in which the feature point may appear. The time interval can be determined according to historical measurement data. The historical measurement data may include time intervals in which multiple feature points may appear. The electronic device can determine whether the current moment is within the time interval to adjust the boosting rate of the airbag, so as to achieve accurate extraction of feature points.

Exemplarily, as shown in FIG. 4 , it is assumed that at least one time interval determined by the blood pressure watch according to the historical data includes [T2, T2']∪[T3, T3']. When the current time is less than T1, as shown in signal 1 in the static pressure signal as shown in Figure 4, the pulse wave signal does not appear, and the blood pressure watch controls the airbag to rapidly increase the pressure. When the current time is greater than T1, as shown in signal 2 in Fig. 4, the pulse wave signal appears (M1 in Fig. 4 appears), and the blood pressure watch controls the air bag to start boosting at a normal boosting rate. When the current time is greater than T1 and less than T2 (eg, signal 2A), the characteristic point M2 has not yet appeared, and the blood pressure watch controls the air bag to boost pressure at a normal rate. When the current time is greater than T2 and less than T2' (such as signal 2B), the feature point M2 has a greater chance of appearing, and the blood pressure watch controls the air bag to increase the pressure at a slower rate, or not to increase the pressure. When the current time is greater than T2' and less than T3, the feature point M2 has been extracted, and the blood pressure watch controls the rate at which the airbag returns to normal to increase pressure. Similarly, when the current time is greater than T3 and less than T3', the feature point M3 has a greater probability of appearing, and the blood pressure watch controls the air bag to increase the pressure at a slower rate, or not to increase the pressure. Repeat this until all required feature points have been extracted.

The above two methods can implement the blood pressure measurement method provided by the embodiments of the present application, shorten the blood pressure measurement time, and improve the blood pressure measurement accuracy. This embodiment of the present application does not limit which one of the above two methods is selected for execution.

S507, the electronic device acquires the pulse wave signal and the static pressure signal according to the pressure signal detected after the airbag is inflated at the second inflation rate.

Exemplarily, similar to the description in this embodiment S503a, with reference to FIG. 6 , after the electronic device controls the air pump to inflate the air bag at the second inflation rate, the pressure sensor can detect the pressure value of the air bag in real time, and will detect the pressure value of the air bag in real time. The pressure value of the airbag is transmitted to the MCU.

In this embodiment of the present application, the electronic device may continuously detect the pressure value of the airbag from the start of blood pressure measurement, and generate a pressure signal according to the detected pressure value from the start of blood pressure measurement. However, since the pulse wave signal may only appear after the pressure value of the air bag is equal to P1, the electronic device can only control the pressure signal after the air pump inflates the air bag at the second inflation rate, that is, starting from the pressure value of the air bag equal to P1 The pressure signal is analyzed in order to extract the pulse wave signal and static pressure signal. Of course, in some embodiments, the electronic device may also not generate the pressure signal before the pulse wave signal appears, but start to generate the pressure signal after controlling the air pump to inflate the airbag at the second inflation rate, and perform the pressure signal on the pressure signal. Analysis to extract the pulse wave signal and static pressure signal. In other embodiments, after the pulse wave signal appears, its characteristic points may not appear, and the user's blood pressure value can be determined only if the extracted pulse wave signal contains characteristic points. Therefore, the pulse wave of the electronic device The pressure signal is not generated before the characteristic point of the signal, but after the control air pump inflates the air bag at the third inflation rate for the first time, the pressure signal is generated, and the signal is analyzed to extract the pulse wave signal and Static pressure signal.

S508 , the electronic device determines the blood pressure value of the user according to at least one feature point in the pulse wave signal and the sum static pressure signal corresponding to the feature point.

Exemplarily, after acquiring the pulse wave signal, the electronic device can extract the characteristic points of the pulse wave signal related to blood pressure from the pulse wave signal, and the time at which the diastolic blood pressure and the systolic blood pressure appear can be calculated from the characteristic points of the pulse wave signal, And map it to the static pressure signal to obtain the static pressure value corresponding to the feature point, so as to obtain the user's blood pressure value, such as the user's diastolic blood pressure and systolic blood pressure.

For example, the static pressure values and their definitions corresponding to the characteristic points of common pulse wave signals are shown in Table 2.

Table 2

For example, a large number of characteristic points of the pulse wave signal can be extracted from the pulse wave signal, such as the maximum amplitude A(MP) of the pulse wave, and the corresponding envelope can be determined by integrating the pulse wave corresponding to A(MP) and dividing it by the fluctuation period If the amplitude is A(SP), the user's systolic blood pressure can be obtained according to the static pressure value in the corresponding static pressure signal when the envelope amplitude is A(SP). The difference between A(MP) and A(SP) may correspond to the envelope amplitude of A(DP), that is, A(DP)=A(MP)-A(SP). The user's diastolic pressure can be obtained according to the static pressure value in the corresponding static pressure signal when the envelope amplitude is A(DP). In the method provided by the embodiment of the present application, the blood pressure watch can detect the pressure value of the air bag in real time through the pressure sensor and feed it back to the MCU, and the MCU can obtain the original signal according to the relationship between the pressure value of the air bag and time. The MCU can analyze the above-mentioned original signals to obtain the static pressure signal and pulse wave signal as shown in Figure 4, in which, for each signal point in the pulse wave signal, it can be compared with the pressure of the air bag in the static pressure signal at the same time. The values correspond one-to-one. Then, the MCU determines the position and appearance time of each feature point through the pulse wave signal, and with reference to the static pressure signal, the static pressure value corresponding to each feature point can be obtained, such as the static pressure value corresponding to the maximum amplitude of the above-mentioned pulse wave.

When the maximum amplitude A(MP) of the pulse wave cannot be accurately extracted, the user's diastolic blood pressure and systolic blood pressure can be obtained by combining the characteristic points of other pulse wave signals as shown in Table 2. This application will not repeat them here.

The blood pressure measurement method provided by the embodiment of the present application, combined with the historical data method, can significantly shorten the time for blood pressure measurement by rapidly increasing the pressure in the pressure segment before the pulse wave signal appears. The electronic device controls the air bag to increase the pressure at a normal speed in the pressure segment after the pulse wave signal appears, and appropriately prolongs the extraction time of the pulse wave signal, which can effectively improve the accuracy of the pulse wave signal extraction. Further, the electronic device controls the airbag to increase or not increase the pressure at a slower rate at the pressure segment that may appear at the characteristic point of the pulse wave signal, and extract the corresponding pulse wave signal and static pressure signal, and then obtain the user's blood pressure information, The extraction time of the characteristic points of the pulse wave signal can be further extended, thereby achieving the purpose of improving the blood pressure measurement accuracy.

The above description mainly introduces the solutions provided by the embodiments of the present application from the perspective of electronic devices. It can be understood that, in order to realize the above functions, the electronic device includes corresponding hardware structures and/or software modules for performing each function, and these corresponding hardware structures and/or software modules for performing each function may constitute an electronic device. Those skilled in the art should easily realize that the present application can be implemented in hardware or in the form of a combination of hardware and computer software, in conjunction with the algorithm steps of the examples described in the embodiments disclosed herein. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

In this embodiment of the present application, the electronic device may be divided into functional modules according to the foregoing method examples. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation.

In the case where each functional module is divided according to each function, FIG. 7 shows a possible schematic diagram of the composition of the electronic device involved in the above embodiment. As shown in FIG. 7 , the electronic device includes: a control unit 701, Judging unit 702 , determining unit 703 , air bag 704 and air pump 705 . For example, the control unit 701 , the determination unit 702 and the determination unit can also be the MCU shown in FIG. 2 , the air bag 704 can also be the air bag 205 shown in FIG. 2 , and the air pump 705 can also be the air pump 204 shown in FIG. 2 .

The control unit 701 is configured to control the air pump 705 to inflate the airbag 704 at a first inflation rate. Exemplarily, the control unit 701 may be configured to execute S301 of the above-mentioned blood pressure measurement method shown in FIG. 3 . The control unit 701 can also be used to execute S502 of the blood pressure measurement method shown in FIG. 5 above.

The determination unit 702 is configured to determine whether the pulse wave signal occurs during the process of controlling the air pump 705 to inflate the airbag 704 at the first inflation rate. Exemplarily, the judging unit 702 may be configured to execute S302 of the blood pressure measurement method shown in FIG. 3 above. The judging unit 702 can also be used to execute S503a or S503b of the blood pressure measurement method shown in FIG. 5 above.

The control unit 701 is further configured to control the air pump 705 to inflate the airbag 704 at a second inflation rate when it is determined that the pulse wave signal occurs, wherein the second inflation rate is smaller than the first inflation rate. Exemplarily, the control unit 701 may also be configured to execute S303 of the above-mentioned blood pressure measurement method shown in FIG. 3 . The control unit 701 may also be configured to execute S504 of the blood pressure measurement method shown in FIG. 5 above.

The determining unit 703 is configured to obtain the pulse wave signal and the static pressure signal in real time according to the pressure signal detected after the airbag 704 is inflated at the second inflation rate, and according to at least one feature point in the pulse wave signal and the corresponding feature point. The static pressure signal determines the user's blood pressure value. Exemplarily, the determining unit 703 may also be configured to perform steps S304 and S305 of the blood pressure measurement method shown in FIG. 3 above. The determining unit 703 may also be configured to execute S508 of the blood pressure measurement method shown in FIG. 5 above.

It should be noted that, all relevant contents of the steps involved in the above method embodiments can be cited in the functional description of the corresponding functional module, which will not be repeated here. The electronic device provided by the embodiment of the present application is used to execute the above-mentioned blood pressure measurement method, and thus can achieve the same effect as the above-mentioned blood pressure measurement method.

In the case where each functional module is divided according to each function, FIG. 8 shows another possible composition diagram of the electronic device involved in the above embodiment. As shown in FIG. 8 , the electronic device includes: a control unit 801 , judging unit 802 , determining unit 803 , detecting unit 804 , air bag 805 and air pump 806 . 2 , the control unit 801 , the determination unit 802 , the determination unit 803 and the detection unit 804 can also be the MCU 201 shown in FIG. 2 , the air bag 805 can also be the air bag 205 shown in FIG. 2 , and the air pump 806 can also be It is the air pump 204 shown in FIG. 2 .

The judging unit 802 is used to determine that when the difference between the pressure values of the airbag 805 when the pulse wave signal occurs in any two blood pressure measurement processes in the historical measurement data is less than the change threshold, determine that the air pump 806 can be controlled to inflate the airbag 805 at the first inflation rate , then, the control unit 801 controls the air pump 806 to inflate the airbag 805 at the first inflation rate. Wherein, the historical measurement data may include: the pressure value of the airbag 805 when the pulse wave signal occurs during multiple blood pressure measurement processes. For example, the determining unit 803 can be used to execute S501 shown in FIG. 5 above.

Wherein, the judgment unit 802 determines that the difference between the pressure values of the airbag 805 when the pulse wave signal occurs in any two blood pressure measurement processes in the historical measurement data is greater than the change threshold, then the control unit 801 controls the air pump 806 to inflate the airbag 805 at the second inflation rate .

The determining unit 803 is further configured to determine the first inflation rate according to the pressure threshold and a preset pressure increase time, where the pressure increase time is the time required for the pressure value of the airbag 805 to rise from 0 to the pressure threshold value.

The control unit 801 is further configured to control the air pump 806 to inflate the airbag 805 at the first inflation rate. Exemplarily, the control unit 801 may be configured to execute S502 shown in FIG. 5 above.

The determining unit 803 is further configured to determine the pressure threshold according to the historical measurement data. The historical measurement data includes: the pressure value of the airbag 805 when the pulse wave signal occurs during multiple blood pressure measurement processes, and the pressure threshold is the minimum pressure value of the airbag 805 when the pulse wave signal occurs during the multiple historical blood pressure measurement processes.

The detection unit 804 is configured to detect the pressure value of the airbag 805 during the process of controlling the air pump 806 to inflate the airbag 805 at the first inflation rate. The determination unit 802 is configured to determine whether the pressure value of the airbag 805 at the current moment is greater than the pressure threshold value. When the pressure value of the airbag 805 at the current time is greater than the pressure threshold, it is determined that the pulse wave signal appears, and when the pressure value of the airbag 805 at the current time is less than the pressure threshold, it is determined that the pulse wave signal does not appear. Exemplarily, the detecting unit 804 and the judging unit 802 may be configured to perform S503a shown in FIG. 5 above.

The detection unit 804 is further configured to detect the pressure signal of the airbag 805 during the process of controlling the air pump 806 to inflate the airbag 805 at the first inflation rate. The judging unit 802 is used for judging and judging whether a pulse wave signal can be extracted from the detected pressure signal. When the pulse wave signal can be extracted from the detected pressure signal, it is determined that the pulse wave signal appears, and when the pulse wave signal cannot be extracted from the detected pressure signal, it is determined that the pulse wave signal does not appear. Exemplarily, the detecting unit 804 and the judging unit 802 may be configured to perform S503b shown in FIG. 5 above.

The control unit 801 is further configured to control the air pump 806 to inflate the airbag 805 at the second inflation rate. Wherein, the second inflation rate is less than the first inflation rate. Exemplarily, the control unit 801 may be configured to execute S504 shown in FIG. 5 above.

The determining unit 803 is further configured to determine at least one pressure interval according to the historical measurement data, and the pulse wave signal included in the detected pressure signal in the at least one pressure interval will contain characteristic points. Wherein, the historical measurement data includes: the pressure value of the air bag when the characteristic point of the pulse wave signal appears in the multiple blood pressure measurement processes, and at least one pressure interval is the pressure value of the air bag when the characteristic point of the pulse wave signal appears in the historical multiple blood pressure measurement processes collection.

The detection unit 804 is further configured to detect the pressure value of the airbag 805 after controlling the air pump 806 to inflate the airbag 805 at the second inflation rate. Exemplarily, the detection unit 804 may be configured to perform S505 shown in FIG. 5 above.

The control unit 801 is further configured to control the air pump 806 to inflate the air bag 805 at a third inflation rate until the air bag 805 is inflated at a third inflation rate starting from the time when the pressure value of the air bag 805 is equal to the minimum value of the pressure interval for each pressure interval in the at least one pressure interval. When the pressure value is equal to the maximum value of the pressure interval, the air pump 806 is re-controlled to inflate the air bag 805 at the second inflation rate. Wherein, the third inflation rate is less than the second inflation rate. Exemplarily, the control unit 801 may be configured to execute S506 shown in FIG. 5 above.

The determining unit 803 is further configured to acquire the pulse wave signal and the static pressure signal according to the pressure signal detected after the airbag is inflated at the second inflation rate. The blood pressure value of the user is determined according to at least one characteristic point in the pulse wave signal and the static pressure signal corresponding to the characteristic point. Exemplarily, the determining unit 803 may be configured to execute S507 and S508 shown in FIG. 5 above.

It should be noted that, all relevant contents of the steps involved in the above method embodiments can be cited in the functional description of the corresponding functional module, which will not be repeated here. The electronic device provided by the embodiment of the present application is used to execute the above-mentioned blood pressure measurement method, and thus can achieve the same effect as the above-mentioned blood pressure measurement method.

In the case of using an integrated unit, another possible composition of the electronic device involved in the above embodiment may include: a processing module, a communication module, an air bag and an air pump.

The processing module is used to control and manage the actions of the electronic device, for example, the processing module is used to support the electronic device to perform S301-S305 in FIG. 3, S501-S508 in FIG. 5 and/or other techniques for the techniques described herein process. The communication module is used to support the communication between the electronic device and other network entities, for example, the communication with the functional modules or network entities shown in FIG. 2 . The electronic device may also include a storage module for storing program codes and data of the electronic device.

The electronic device provided by the embodiment of the present application is used to execute the above-mentioned blood pressure measurement method, and thus can achieve the same effect as the above-mentioned blood pressure measurement method.

From the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above functional modules is used as an example for illustration. In practical applications, the above functions can be allocated as required. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or May be integrated into another device, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

Units described as separate components may or may not be physically separated, and components shown as units may be one physical unit or multiple physical units, that is, may be located in one place, or may be distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, which are stored in a storage medium , including several instructions to make a device (which may be a single chip microcomputer, a chip, etc.) or a processor (processor) to execute all or part of the steps of the methods in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (7)

1. An electronic device, characterized in that,

the electronic equipment comprises a control unit, a judging unit, a determining unit, an air bag and an air pump;

the control unit is used for controlling the air pump to inflate the air bag at a first inflation rate;

the judging unit is used for judging whether a pulse wave signal appears or not in the process of controlling the air pump to inflate the air bag at the first inflation rate;

the control unit is further used for controlling the air pump to inflate the air bag at a second inflation rate when the judgment unit determines that the pulse wave signal appears, wherein the second inflation rate is smaller than the first inflation rate;

the determining unit is used for acquiring the pulse wave signal and the static pressure signal in real time according to the detected pressure signal after the air bag is inflated at the second inflation rate;

the determining unit is further used for determining a blood pressure value of the user according to at least one characteristic point in the pulse wave signal and the static pressure signal corresponding to the characteristic point;

the determining unit is further configured to determine at least one pressure interval, where pulse wave signals included in the detected pressure signals in the at least one pressure interval may include feature points; the characteristic points comprise an envelope peak value, an envelope inflection point and an envelope slope maximum point;

the detection unit is also used for detecting the pressure value of the air bag after controlling the air pump to inflate the air bag at the second inflation rate;

for each of the at least one pressure interval, the control unit controls the air pump to inflate the airbag at a third inflation rate starting from a pressure value of the airbag equal to a minimum value of the pressure interval, and controls the air pump to inflate the airbag at the second inflation rate again until the pressure value of the airbag is equal to a maximum value of the pressure interval, wherein the third inflation rate is smaller than the second inflation rate.

2. The electronic device of claim 1,

the detection unit is used for detecting the pressure value of the air bag in the process of controlling the air pump to inflate the air bag at the first inflation rate;

the judging unit is used for judging whether the pulse wave signal appears or not, and comprises the following steps:

the judgment unit is used for judging whether the pressure value of the air bag at the current moment is greater than a pressure threshold value;

when the pressure value of the air bag at the current moment is larger than the pressure threshold value, the pulse wave signal is determined to appear, and when the pressure value of the air bag at the current moment is smaller than the pressure threshold value, the pulse wave signal is determined not to appear.

3. The electronic device of claim 1,

the detection unit is used for detecting a pressure signal of the air bag in the process of controlling the air pump to inflate the air bag at the first inflation rate;

the judging unit is used for judging whether the pulse wave signal appears or not, and comprises the following steps:

the judging unit is used for judging whether the pulse wave signal can be extracted from the detected pressure signal;

when the pulse wave signals can be extracted from the detected pressure signals, the pulse wave signals are determined to appear, and when the pulse wave signals cannot be extracted from the detected pressure signals, the pulse wave signals are determined not to appear.

4. The electronic device of claim 2,

the determining unit is further configured to determine the pressure threshold according to historical measurement data, where the historical measurement data includes: the pressure value of the air bag when the pulse wave signal appears in the process of measuring the blood pressure for multiple times, and the pressure threshold value is the minimum pressure value of the air bag when the pulse wave signal appears in the process of measuring the blood pressure for multiple times in history.

5. The electronic device of claim 1,

the determining unit is further configured to determine the at least one pressure interval according to historical measurement data, where the historical measurement data includes: the pressure value of the air bag when the characteristic point of the pulse wave signal appears in the process of measuring the blood pressure for multiple times, and the at least one pressure interval is a set of the pressure values of the air bag when the characteristic point of the pulse wave signal appears in the process of measuring the blood pressure for multiple times in history.

6. The electronic device of claim 2 or 4,

the determining unit is further used for determining the first inflation rate according to a pressure threshold value and preset pressure rise time, and the pressure rise time is the time required for the pressure value of the air bag to rise from 0 to the pressure threshold value.

7. The electronic device of claim 6, wherein before the control unit is configured to control the air pump to inflate the airbag at the first inflation rate, the control unit comprises:

the judging unit is used for judging whether the air pump can be controlled to inflate the air bag at the first inflation rate or not according to historical measurement data, and the historical measurement data comprise: the pressure value of the air bag when the pulse wave signal appears in the process of measuring the blood pressure for multiple times;

the control unit is used for controlling the air pump to inflate the air bag at a first inflation rate, and comprises:

the judgment unit is used for determining that the difference between the pressure values of the air bag when the pulse wave signal appears in any two blood pressure measurement processes in the historical measurement data is smaller than a variation threshold value, and the control unit controls the air pump to inflate the air bag at a first inflation rate;

the judgment unit is used for determining that the difference between the pressure values of the air bag when the pulse wave signal appears in any two blood pressure measurement processes in the historical measurement data is larger than the variation threshold, and the control unit controls the air pump to inflate the air bag at the second inflation rate.

Images