CN205964068U - A supersound echo image device for mobile terminal - Google Patents

Abstract

The utility model discloses an ultrasonic echo imaging device for a mobile terminal, which relates to the technical field of ultrasonic equipment. It includes a portable array probe that is connected to the circuit board through a flexible board and realizes the switching of the transmitting channel and the receiving channel through the hardware circuit, the channel selection switch chip that realizes the gating switching of the channel through the configuration of the signal processing unit, and the configuration of the signal processing unit. A high-voltage switch chip for high-voltage conversion and transmission of signals, a digital-to-analog converter for receiving and digitizing ultrasonic signals, a channel folding switch chip for channel folding of received data, and sending ultrasonic excitation to portable The array probe is a signal processing unit that generates image data by processing the echo signal through the receiving device. The utility model realizes the purpose of simplified appearance, hand-held portability, and reduced power consumption, and has the characteristics of low power consumption, easy portability, good real-time performance, and high integration degree.

Description

Ultrasonic echo imaging device for mobile terminal

technical field

The utility model relates to the technical field of ultrasonic equipment, in particular to an ultrasonic echo imaging device for a mobile terminal.

Background technique

Ultrasound is a sound wave with a frequency exceeding 20KHz, and the ultrasonic frequency used in medical ultrasound imaging is only in the 1MHz to 10MHz frequency band. The standard ultrasonic echo imaging is to scan the biological tissue with the ultrasonic sound velocity, and obtain the image of the biological tissue through the reception and processing of the reflected signal. The echo reflection of ultrasound comes from the change of acoustic impedance on the propagation path. The acoustic impedance of the biological tissue interface usually changes greatly, and the ultrasound will reflect strongly. Ultrasound echo imaging is based on this acoustic principle. Ultrasound echo imaging uses pulse wave emission, and echoes at different depths can be distinguished in depth. Ultrasound echo imaging technology has the advantages of good real-time performance, no ionizing radiation, non-invasive, pain-free, and low equipment cost. It is widely used in clinical examination and diagnosis, and is also welcomed by doctors and patients.

However, traditional ultrasound imaging equipment is bulky, not portable, consumes a lot of power, and is expensive. Most of the equipment can only be used for departmental examinations in large and medium-sized hospitals, and are rarely used by people in daily life and some accident sites. occasions are limited.

Based on the above, there is an urgent need for an ultrasonic echo imaging device for a mobile terminal to solve the above technical problems existing in the prior art.

Utility model content

The purpose of this utility model is to propose an ultrasonic echo imaging device for a mobile terminal to solve the problems that the existing ultrasonic echo imaging device is large in size, difficult to carry, high in power consumption, high in cost, and limited in application.

For this purpose, the utility model adopts the following technical solutions:

An ultrasonic echo imaging device for a mobile terminal, comprising:

The transmitting device includes a portable array probe connected to the power supply unit, a channel selection switch chip, and a high-voltage switch chip. The portable array probe is connected to the circuit board through a flexible board, and the switching between the transmitting channel and the receiving channel is realized through a hardware circuit. The channel selection switch The chip realizes the gate switching of the channel through the configuration of the signal processing unit, and the high-voltage switch chip realizes the high-voltage conversion and emission of the signal through the configuration of the signal processing unit;

The receiving device includes a digital-to-analog converter and a channel folding switch chip, the digital-to-analog converter is used to realize the reception and digitization of ultrasonic signals, and the channel folding switch chip is used to realize channel folding of received data;

The signal processing unit includes an FPGA chip. The signal processing unit sends the ultrasonic excitation to the portable array probe through the sending device, and generates image data through the echo signal through the signal processing technology through the receiving device.

As a preferred solution for an ultrasonic echo imaging device used in a mobile terminal, the power supply unit includes a medical lithium battery and its related charging circuit.

As a preferred solution for an ultrasonic echo imaging device for a mobile terminal, the signal processing technology includes dynamic focusing and dynamic apodization.

As a preferred solution of an ultrasonic echo imaging device for a mobile terminal, it includes a display connected to the output end of the signal processing unit, receiving and displaying the ultrasonic image data output by the signal processing unit.

The beneficial effects of the utility model are:

The utility model proposes an ultrasonic echo imaging device for a mobile terminal, which is an ultrasonic device applied to a mobile terminal. By integrating the signal processing module and the probe module into one circuit board, the appearance is simplified, hand-held and portable, and power is reduced. It has the characteristics of low power consumption, easy to carry, good real-time performance and high integration.

Description of drawings

Fig. 1 is the schematic diagram of the emission part interval scanning of the specific embodiment of the present invention;

Fig. 2 is a schematic diagram of the near-field channel selection of the transmitting part of the specific embodiment of the present invention;

Fig. 3 is a schematic diagram of the far-field channel selection of the transmitting part of the specific embodiment of the present invention;

Fig. 4 is a structural block diagram of an ultrasonic echo imaging device for a mobile terminal provided by a specific embodiment of the present invention;

Fig. 5 is a data communication block diagram of the signal processing part provided by the specific embodiment of the present invention.

detailed description

In order to make the technical problem solved by the utility model, the technical scheme adopted and the technical effect achieved clearer, the technical scheme of the embodiment of the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiment is only Some embodiments of the utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present utility model.

This embodiment proposes a preferred ultrasonic echo imaging device for a mobile terminal, which includes:

The transmitting device includes a portable array probe connected to the power supply unit, a channel selection switch chip, and a high-voltage switch chip. The portable array probe is connected to the circuit board through a flexible board, and the switching between the transmitting channel and the receiving channel is realized through a hardware circuit. The channel selection switch The chip realizes the gate switching of the channel through the configuration of the signal processing unit, and the high-voltage switch chip realizes the high-voltage conversion and emission of the signal through the configuration of the signal processing unit;

In this embodiment, the power supply unit includes a medical lithium battery and its related charging circuit. In order to improve the integration of components and reduce the volume of components, the high-voltage switch chip is preferably HV2901.

The receiving device includes a digital-to-analog converter and a channel folding switch chip, the digital-to-analog converter is used to realize the reception and digitization of ultrasonic signals, and the channel folding switch chip is used to realize channel folding of received data;

The signal processing unit includes an FPGA (Field Programmable Gate Array) chip. The signal processing unit sends the ultrasonic excitation to the portable array probe through the sending device, and generates image data through the echo signal through the signal processing technology through the receiving device.

In this embodiment, the signal processing techniques include dynamic focusing and dynamic apodization. In order to improve the integration of components and reduce the volume of components, the FPGA chip is preferably chip EP3C40F484.

Aiming at the reality of handheld device terminals, the design concept of low power consumption is adopted in the design process. When the device is turned on for a period of time, it saves power by turning off high-voltage switch chips and digital-to-analog converters and other high-energy-consuming devices. When the device is turned on again, only Just press the on button.

Preferably, the ultrasonic echo imaging device for a mobile terminal in this embodiment further includes a display connected to the output end of the signal processing unit, receiving and displaying the ultrasonic image data output by the signal processing unit.

The above-mentioned ultrasonic echo imaging device for mobile terminals is an ultrasonic device applied to mobile terminals. By integrating the signal processing module and the probe module into one circuit board, the purpose of simplified appearance, hand-held portability, and reduced power consumption is realized. Power consumption, easy to carry, good real-time performance, and high integration.

The conventional ultrasound imaging method is fixed-point focusing in the transmission mode, dynamic beamforming in the reception mode to obtain the scan lines of the ultrasound image, and sequential scanning to obtain a complete image at the same time. By focusing at a given point depth, better image quality can be obtained at the focal point and in the nearby limited area. At positions beyond the limited area, the imaging quality will decrease, resulting in a decrease in the focused near-field and far-field resolution. A typical solution is to perform multi-focus point imaging, obtain each focus and a part of the image in a limited area, and combine image blocks obtained at different focus depths to obtain an image with stable image quality throughout the scanning depth. Multiple focus points can greatly improve the imaging quality, but multiple focusing will reduce the imaging speed, limit the frame rate of ultrasound imaging, and make it difficult to obtain a complete and coherent tissue morphology. In the conventional scanning mode, sequential scanning generates scan lines, and the switch control process of the array element is simple, but the number of scan lines generated is small, which limits the imaging quality of ultrasound. The beam aperture of traditional ultrasound imaging is given in the entire image range, which will limit the detection depth of the image, the beam pointing angle is limited, and it cannot be focused in the far field.

In order to further solve the problems of high power consumption and poor imaging quality in the existing ultrasonic echo imaging method. This embodiment also proposes an imaging method applied in the above-mentioned ultrasonic echo imaging device for a mobile terminal, including the following steps:

Reduce the number of focal points for transmitting ultrasonic signals in the near-field area, reduce the number of transmission channels, and select the middle channel for data transmission; increase the number of focal points for transmitting ultrasonic signals in the far-field area, increase the number of transmission channels, and select all channels for data transmission.

Since the path length of the echo after the ultrasonic wave touches the obstacle is different, the echo will produce loss during the transmission process. Obviously, according to the characteristics of the near field, the number of focal points for transmitting ultrasonic signals can be reduced, and the number of channels can also be reduced at the same time, and the middle channel with a strong echo signal strength can be selected for transmission; due to the weak echo signal strength in the far field, it is necessary to To increase the number of focal points for transmission, the number of transmission channels also needs to be increased to receive more echo signals.

When the number of transmitting array elements is fixed, the number of scanning lines is increased by scanning at intervals.

For a device, the number of array elements is fixed. Although the control of traditional sequential scanning is simple, the number of scan lines is limited, which affects the quality of echo imaging. In some cases, the number of scan lines can be increased, thereby improving the echo imaging quality.

The method of multi-point fixed-point emission focusing is adopted to improve the imaging quality of the echo signal.

Focusing at a given point depth can obtain better image quality at the focal point and in the nearby limited area, but at positions beyond the limited area, the imaging quality will decrease. This embodiment adopts the method of multi-point fixed-point emission focusing to improve The imaging quality of the echo signal.

The method of channel folding is adopted to reduce the number of receiving channels.

This implementation mode adopts the method of channel folding to reduce the number of receiving channels, thereby reducing the power consumption and design complexity of the device.

A dynamic focusing method is used to perform beamforming on the echo signal to improve the imaging resolution.

For echo signals, this embodiment adopts a dynamic focusing method to perform beamforming on the signals to improve the imaging resolution.

The method of dynamic apodization is used to suppress some side lobes.

In the sound field formed by the transmission and reception of ultrasonic signals, in addition to the main lobe that determines the image resolution, there are also some side lobes. The side lobe is the main cause of artifacts, and its size will affect the quality of the final image. The main way to suppress the side lobe is to use dynamic apodization. In this implementation manner, different apodization strategies are respectively adopted for different situations of the near field and the far field. For the near-field situation, it is necessary to add a window to the received data of each channel, and for the far-field situation, the point-by-point windowing and apodization method is used for the middle channel data, and for the edge channel data on both sides due to the weakened signal strength, only need Weighting can be done with a fixed tap value.

Specifically, in FIG. 1 , when the number of transmitting array elements is fixed, the number of scanning lines is increased by scanning at intervals. Compared with sequential scanning, the interval between adjacent scan lines is half an array element. For interval scanning, odd-numbered scanning lines select array element switches from the left, even-numbered scan lines select array element switches from the right, and the difference between adjacent odd and even scan lines is half an array element, thereby realizing interval scanning.

In Figure 2 and Figure 3, when the number of transmitting array elements is fixed, the transmitting part adopts different transmitting strategies for the difference between the near field and the far field. For the near-field situation, because the echo signal loss is not large, it is only necessary to use the middle channel data for data transmission; for the far-field situation, because the echo signal loss is relatively obvious, so all channels need to be used. For a device with a fixed number of array elements, the number of channels is pre-fixed by circuit design. Here, the method of multiplexing channels is used to transmit far-field data. For the far field situation, the channel data is transmitted through part a first, and then switched to part b for channel data transmission, and the full channel transmission is realized through the multiplexing circuit, which reduces the complexity of circuit design.

In Fig. 4, a structural block diagram of the ultrasonic echo imaging device of the present invention is given. When transmitting ultrasonic signals, the signal processing unit configures the high-voltage switch chip and the channel selection switch chip through the configuration signal sent by the serial port, and realizes channel multiplexing by configuring the channel selection switch, reducing the complexity of hardware design. After the channel is selected, the signal processing unit emits an ultrasonic pulse signal, passes through a high-voltage switch, and transmits it to the corresponding array probe to realize ultrasonic emission. When receiving the ultrasonic echo signal, the signal processing unit configures the channel folding switch chip through the configuration information sent by the serial port to realize the channel folding of the received signal, and then sends it to the digital-to-analog converter to realize signal digitization. Transmitting and receiving conversion is realized by receiving and transmitting switch hardware circuit. Aiming at the reality of handheld device terminals, the design concept of low power consumption is adopted in the design process. When the device is turned on for a period of time, it saves power by turning off high-voltage switch chips and digital-to-analog converters and other high-energy-consuming devices. When the device is turned on again, only Just press the on button.

In Fig. 5, the data communication block diagram of the signal processing part of the utility model is given. The transmitting part realizes the fixed-point transmitting focus through the delay module, and starts to receive the echo signal after a period of time, and the echo signal is digitized through the digital-to-analog converter. Finally, the dynamic focus of the signal is realized by delaying the received signal of each channel, and then the signal-to-noise ratio of the signal is improved through matched filtering, and the orthogonalization of the signal is realized through modulus and low-pass filtering, and finally the signal is converted into image grayscale The representation output of .

In this embodiment, a compromise is made between the image quality and the imaging speed for the emission mode focusing method, and three focal depths are selected for imaging, which not only ensures the imaging quality, but also reduces the limitation on the frame rate. The scanning method abandons the traditional sequential scanning, and adopts the method of interval scanning to obtain more scanning lines. The aperture of the beam is controlled at different focal depths in the near field and the far field, so that the imaging in the near field can minimize power consumption while ensuring a large detection depth.

Compared with the traditional scheme for realizing ultrasonic imaging, the utility model has the following advantages:

1. Improvements are made on traditional transmission and reception methods and beamforming methods to provide a low power consumption and high imaging quality ultrasonic echo imaging method applied to mobile terminals.

2. Provide a portable handheld ultrasound equipment terminal system, which has the characteristics of low power consumption, easy to carry, good real-time performance, and high integration.

3. Provide an accident scene that is applied to daily life or accidents, supplement the diagnosis results of traditional medical equipment (such as stethoscope), and assist doctors in ward rounds and other tasks that require frequent movement.

4. Provide a solution for ultrasonic image imaging using mobile devices, replacing the existing method of completing ultrasonic imaging by computer.

5. The utility model can also support a variety of mobile devices for ultrasonic image imaging, has strong compatibility, and satisfies the needs of ultrasonic imaging equipment to the greatest extent.

The technical principle of the utility model is described in conjunction with specific embodiments. These descriptions are only for explaining the principle of the utility model, and cannot be construed as limiting the protection scope of the utility model in any way. Based on the explanations herein, those skilled in the art can think of other specific implementations of the present utility model without creative work, and these forms will all fall within the protection scope of the present utility model.

Claims (3)

1. An ultrasonic echo imaging device for a mobile terminal, characterized in that it comprises: The transmitting device includes a portable array probe connected to the power supply unit, a channel selection switch chip, and a high-voltage switch chip. The portable array probe is connected to the circuit board through a flexible board, and the switching between the transmitting channel and the receiving channel is realized through a hardware circuit. The channel selection switch The chip realizes the gate switching of the channel through the configuration of the signal processing unit, and the high-voltage switch chip realizes the high-voltage conversion and emission of the signal through the configuration of the signal processing unit; The receiving device includes a digital-to-analog converter and a channel folding switch chip, the digital-to-analog converter is used to realize the reception and digitization of ultrasonic signals, and the channel folding switch chip is used to realize channel folding of received data; The signal processing unit includes an FPGA chip. The signal processing unit sends the ultrasonic excitation to the portable array probe through the sending device, and generates image data through the echo signal through the signal processing technology through the receiving device. 2. The ultrasonic echo imaging device for a mobile terminal according to claim 1, wherein the power supply unit includes a medical lithium battery and its associated charging circuit. 3. The ultrasonic echo imaging device for a mobile terminal according to claim 1 or 2, characterized in that it comprises a display, the display is connected to the output end of the signal processing unit, and receives the ultrasonic image data output by the signal processing unit and display it.