KR102068095B1 - Ultrasonic Intrusion Detection System with Ultrasonic Sensor Failure Check and Saturation Prevention Function - Google Patents

Abstract

The present invention relates to an ultrasonic intrusion detection apparatus having a function of checking an ultrasonic sensor for failure and preventing saturation by detecting an external intrusion and detecting a normal operation of the ultrasonic sensor and informing the user of the normal operation of the ultrasonic sensor. .

Description

Ultrasonic Intrusion Detection System with Ultrasonic Sensor Failure Check and Saturation Prevention Function

The present invention relates to an ultrasonic intrusion detection device having an ultrasonic sensor failure check and a saturation prevention function, and more particularly, to detect the normal operation of the ultrasonic sensor, which is a security device for detecting external intrusion, and to inform the user of the ultrasonic intrusion. The present invention relates to an ultrasonic intrusion detection device having an ultrasonic sensor failure check and a saturation prevention function for preventing a sensor from being degraded.

As the propagation of vehicles has expanded and the ownership of vehicles has become commonplace, theft incidents on objects and vehicles inside the vehicles frequently occur.

In order to prevent such theft crimes, various intrusion detection devices using pressure, infrared rays, ultrasonic waves, and the like are installed inside a structure such as a house or a vehicle.

The most widely applied among them is an intrusion detection apparatus using ultrasonic waves.

An intrusion detection apparatus using general ultrasonic waves periodically transmits an ultrasonic signal (hereinafter referred to as "TX ultrasonic wave") and an ultrasonic signal (hereinafter referred to as "RX ultrasonic wave") in which the transmitted ultrasonic wave hits an object and returns. "Receive", and measure the time it takes for the transmitted transmission ultrasound to be transmitted to receive the reception ultrasound corresponding to the transmission ultrasound (hereinafter referred to as "transmission and reception time") to transmit and receive time than a preset reference time. In this case, a time synchronization method for detecting an intrusion and a phase synchronization method for determining an intrusion by checking a phase difference between the transmitted transmission ultrasound phase and the received reception ultrasound are mainly used.

Since the time synchronization method and the phase synchronization method are performed by transmitting one transmission ultrasound, waiting until the reception ultrasound wave corresponding to the transmission ultrasound is received, and then transmitting the next transmission ultrasound, the temperature change, the external environment change, and the vehicle internal environment are performed. There was a problem that errors can occur frequently because they are sensitive to changes.

In addition, even if it does not operate normally due to a failure of the ultrasonic sensor, the user was not able to check this, and there was no device for guiding the user not to detect the intrusion.

In addition, even if the ultrasonic sensor operates normally, if the saturation occurs in the ultrasonic sensor receiver RX due to environmental changes (vehicle seat movement, cargo change) inside a structure such as a vehicle, detection of the ultrasonic sensor is reduced. This happens.

However, the vehicle environment is an environment in which the position of the seat is changed by the driver of the vehicle, the number of objects in the vehicle increases or decreases, or the internal environment changes frequently, and thus, the discernment of intrusion detection using the ultrasonic sensor is extremely low.

An object of the present invention for solving the problems of the prior art as described above can be confirmed by the simple operation of repeating the ultrasonic transmission and reception several times on or off the ultrasonic sensor installed in the structure, such as a vehicle to detect external intrusion. In addition, the present invention provides an ultrasonic intrusion detection device having an ultrasonic sensor failure check and saturation prevention function to prevent the saturation occurring in the ultrasonic sensor due to the change of the internal environment so that the detection rate of the ultrasonic sensor can be always maintained at the optimal state. It is.

According to an aspect of the present invention, there is provided an ultrasonic intrusion detecting apparatus including an ultrasonic transmitter for transmitting ultrasonic waves, comprising: a door lock detector for generating an anti-theft mode event signal; When the anti-theft mode is started by the anti-theft mode event signal input from the door lock detection unit transmits the transmission ultrasonic waves to the interior of the structure, and receives the received ultrasonic waves in response to the transmitted ultrasonic waves, but the transmission of the ultrasonic transmission on a plurality of times ( An intrusion detection unit that is ON and OFF; And comparing the plurality of times of the received ultrasonic waves with a preset first reference data a plurality of times, and when it is checked whether the received ultrasonic waves are included in a preset first reference data range, the intrusion detecting unit A controller which determines that the operation is normal, and determines that the intrusion detection unit does not operate normally when the data of the received ultrasonic wave is checked as being out of preset first reference data; And the control unit starts the anti-theft mode when comparing the ultrasonic sensor with normal operation, and compares the received ultrasonic data with the second reference data, wherein the received ultrasonic data is preset with the preset reference data. If the reference data does not correspond to the second reference data, the transmission ultrasonic wave is adjusted by adjusting the radiation value of the transmission ultrasonic wave so as to correspond to the second reference data, and the intrusion detection unit generates and transmits an ultrasonic wave generator ; An ultrasonic transmitter for transmitting an ultrasonic wave when the anti-theft mode is started in the vehicle; An ultrasonic receiver configured to receive received ultrasonic waves in response to the transmitted ultrasonic waves; Ultrasonic sensitivity measuring unit for measuring the sensitivity of the received ultrasonic wave; And an ultrasonic signal saturation detector for comparing whether the received ultrasonic wave and the second reference data correspond to each other. Wherein, the radiation value is at least one selected from a duty value, a level value, an output position, a range, and an ON / OFF time of the transmission ultrasonic wave. An ultrasonic intrusion detection apparatus having a function is provided.
The controller may further include an alarm unit configured to generate a warning sound signal when the intrusion detection unit determines that the intrusion detection unit does not operate normally, and receive the warning sound signal from the controller to output a warning sound to the outside; The present invention provides an ultrasonic intrusion detection apparatus having an ultrasonic sensor failure check and a saturation prevention function.

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The present invention can confirm the normal operation of the ultrasonic sensor, which is a security device for detecting external invasion, by a simple operation of repeating the ultrasonic transmission / reception several times on / off, thereby establishing the reliability of safety and confirming the normal operation of the external device. By promptly informed, there is an effect that can quickly respond to the risk of theft in the vehicle.

In addition, the present invention can prevent the deterioration of the detection of the ultrasonic sensor that can occur in accordance with the external environment changes in the anti-theft mode at any time, there is an effect that can detect the intrusion more stable and accurate.

1 is a view showing the configuration of an ultrasonic intrusion detection apparatus having a function of checking an ultrasonic sensor failure and preventing saturation according to the present invention.
2 is a view showing a signal waveform for explaining the normal operation check according to the failure detection of the ultrasonic sensor according to the present invention.
3 is a view showing a signal waveform for explaining the failure confirmation according to the failure check of the ultrasonic sensor according to the present invention.
4 is a flowchart illustrating an ultrasonic intrusion detection method having an ultrasonic sensor failure check and a saturation prevention function according to the present invention.
5 is a view for explaining the saturation phenomenon occurring in the receiving unit of the ultrasonic sensor after the ultrasonic sensor according to the present invention is determined to be a normal operation.
6 is a view for explaining the prevention of saturation phenomenon occurring in the receiver of the ultrasonic sensor according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in more detail an ultrasonic intrusion detection device having a function of checking the failure of the ultrasonic sensor and the saturation phenomenon prevention function according to a preferred embodiment of the present invention.

1 is a view showing the configuration of an ultrasonic intrusion detection device having a failure detection and saturation phenomenon prevention function according to the present invention, Figure 2 illustrates the normal operation check according to the failure detection of the ultrasonic sensor according to the present invention. Figure 3 is a view showing a signal waveform diagram, Figure 3 is a view showing a signal waveform diagram for explaining the failure confirmation according to the failure check of the ultrasonic sensor according to the present invention.

1 to 3, the ultrasonic intrusion detection apparatus 100 having an ultrasonic sensor failure check and a saturation phenomenon preventing function according to a preferred embodiment of the present invention is applied to the inside of the structure. Here, the structure includes all the building structures such as vehicles, ships, airplanes and buildings and is installed on the structure, and is used for the purpose of security devices for detecting external intruders.

Ultrasonic intrusion detection apparatus 100 having an ultrasonic sensor failure check and saturation phenomenon prevention function according to a preferred embodiment of the present invention, the control unit 10, the storage unit 20, intrusion detection unit 30, door lock detection unit 40 ) And an alarm unit 50.

The storage unit 20 includes a program area for storing a control program for controlling the operation of the ultrasonic intrusion detection apparatus 100 according to the present invention, a temporary area for temporarily storing data generated during the execution of the program, and the present invention. And an area for storing the reference value of the first reference data, which is a reference value for checking whether the received ultrasound is measured in the anti-theft mode according to the present invention.

In addition, the storage unit 20 includes an area for storing the radiation value, which is a reference value, of the second reference data compared with the received ultrasonic waves received in the anti-theft mode. The emission value here includes the duty value, level, output position, range and ON / OFF time of the transmitted ultrasound.

The intrusion detection unit 30 corresponds to an ultrasonic sensor, an ultrasonic wave generator 31 for generating a transmission ultrasonic wave to be transmitted as an ultrasonic sensor module, an ultrasonic transmitter 32 for transmitting the generated transmission ultrasonic waves, and corresponding to each of the transmitted transmission ultrasonic waves. Ultrasonic sensitivity measuring unit 33 for receiving the received ultrasonic wave, the ultrasonic sensitivity measuring unit for measuring the sensitivity of the received ultrasonic wave, and comparing the measured sensitivity of the received ultrasonic wave with the sensitivity of the previous receiving ultrasonic wave to measure the amount of change of the received ultrasonic wave ( 34) and an ultrasonic signal saturation detector 35 for detecting the AD value of the received ultrasonic wave received by the ultrasonic receiver 33 and outputting the AD value to the controller 10.

When the door lock detection unit 40 detects the OFF of the door, the door lock detection unit 40 outputs an anti-theft mode event signal for entering the anti-theft mode to the controller 10. Here, the structure may be a house or a vehicle, and in the following description, a case in which the structure is a vehicle will be described.

In the case of a vehicle, the door lock detection unit 40 is a detection unit for detecting the on / off of a door for detecting the on / off of the door of the vehicle as shown in FIG. 1, a vehicle key box (not shown) or the vehicle. It may be a detection unit for detecting starting of the vehicle on / off from a body control module (BCM) or the like.

In addition, the door lock detection unit 40 may be a pressure detection means (not shown) installed inside the vehicle to determine the presence of a person by the pressure, the vehicle start detection, door lock OFF (off) detection, passenger detection during Even one can determine whether an event has occurred and output the anti-theft mode event signal.

Two or more of the plurality of detection means may be configured to set the anti-theft mode only when detected, or may be configured to set the anti-theft mode only when all three are detected.

The controller 10 controls the overall operation according to the present invention. In particular, the control unit 10 determines whether the anti-theft mode event occurs by the anti-theft mode event signal input from the door lock detection unit 40 and sets (starts) the anti-theft mode when it is determined that the anti-theft mode event has occurred.

When the anti-theft mode is started, the controller 10 controls the ultrasonic wave generation unit 31 of the intrusion detection unit 30 to transmit the transmission ultrasonic waves, and the ultrasonic receiver 33 receives the reception ultrasonic waves in response to the transmission ultrasonic waves. To control.

In this case, the controller 10 controls the driving of the ultrasonic wave generator 31 so that the control unit 10 controls the transmission of the transmission ultrasound to be turned on and off a plurality of times.

That is, the controller 10 controls the duty of the transmission ultrasonic wave to be repeated three times on / off (see FIGS. 2 and 3).

Then, the controller 10 compares the received ultrasonic data received a plurality of times with the first reference data stored in the storage 20 a plurality of times, and as a result of comparison, whether the received ultrasonic data is included in the first reference data range. Check it.

Here, the first reference data of the received ultrasonic waves may be stored in the storage unit 20 or configured to be initially set by a circuit amplification factor set in the ultrasonic receiver 33.

In addition, the first reference data may be data regarding a duty, data about an on / off time of the duty, or the duty and duty. It may be composed of data including the on / off time of.

Subsequently, the controller 10 checks (determines) whether the data of the received ultrasonic waves is included in the first reference data range. When the data of the received ultrasonic waves is included in the first reference data range, the ultrasonic sensor of the intrusion detection unit 30 is included. Is determined to be operating normally.

If the control unit 10 checks (determines) that the received ultrasonic waves deviate from the first reference data, the controller 10 determines that the intrusion detection unit 30, which is the ultrasonic sensor, does not operate normally. Output a fault signal to (50).

That is, the controller 10 repeats the duty of the transmitting ultrasonic waves ON / OFF one to three times while repeating them (see FIGS. 2 and 3), while the data of the received ultrasonic waves and the When the first reference data is continuously compared and the comparison result (determination) is included in the first reference data range, the intrusion detection unit 30, which is an ultrasonic sensor, determines that the sensor operates normally, and the data of the received ultrasonic wave is determined to be normal. Is determined to be out of the first reference data range, the intrusion detection unit 30 as the ultrasonic sensor is determined not to operate normally, and if it does not operate normally, it outputs a failure signal to the alarm unit 50.

After that, when it is determined that the ultrasonic sensor, which is the intrusion detecting unit 30, is normal, the controller 10 drives to an initial setting to set the anti-theft mode, and then receives the ultrasonic wave receiving unit 33 by transmitting a transmission ultrasonic wave. The ultrasound data and the second reference data are compared.

At this time, the saturation phenomenon (saturation) of the ultrasonic receiver 33 is detected by the ultrasonic signal saturation detector 35.

Subsequently, the controller 10 compares the received ultrasonic data with the second reference data, and if the received ultrasonic waves do not correspond to the second reference data, the controller 10 adjusts the transmitted ultrasonic waves to the second reference data. Adjust the radiation value of the transmitted ultrasonic wave.

The radiation value of the ultrasonic transmitter 32 is controlled by the controller 10 to control the duty and the on / off time of the ultrasonic transmitter 32. For example, the duty 40% (PWM 40% on, 60). % off), carrier duty 300ms (300ms on, 700ms off) to control.

That is, the controller 10 controls the ultrasonic transmitter 32 to match the preset reference voltage of the ultrasonic receiver 33. In detail, the controller 10 controls the reference voltage set in the ultrasonic receiver 33. Read and compare with the second reference data set in advance, and if it is determined that the internal environment has changed in the basic state as a result of the comparison, and adjusts the level of the ultrasonic wave of the ultrasonic transmitter 32, the reference voltage set in the ultrasonic receiver 33 The ultrasonic transmitter 32 is controlled to transmit the transmitted ultrasonic waves at an intensity corresponding to, and if the reference voltage value set in the ultrasonic receiver 33 is smaller than the basic state, the ultrasonic transmitter 32 increases the intensity of the transmitted ultrasonic waves 32. To control.

That is, the controller 10 continuously controls (adjusts) the ultrasonic transmitter 32 to match the set reference voltage of the ultrasonic receiver 33 to prevent the saturation phenomenon from occurring in the ultrasonic receiver 33.

For this reason, the amplification rate of the ultrasonic sensor receiver may be adjusted to prevent the deterioration of the ultrasonic detection due to the saturation of the ultrasonic receiver 33, but the amplification ratio is limited.

Since the sound pressure level coming into the ultrasonic receiver 33 (see FIG. 5) is too fine (a few mv, so it is difficult to distinguish from the MCU), it is amplified to have a constant level value according to the size and state of the vehicle in order to increase the signal level. It is difficult to control them.

Therefore, the saturation phenomenon is prevented from occurring in the ultrasonic receiver 33 by adjusting the intensity of the ultrasonic wave of the ultrasonic transmitter 32 without adjusting the amplification factor of the ultrasonic receiver 33.

Herein, the emission value refers to duty and on / off time, but may include a duty level value, an output position, a range, and the like of the ultrasonic wave in addition to the duty and on / off time. will be.

When controlling the intensity of the transmitted ultrasonic wave of the ultrasonic transmitter 32, the controller 20 considers the duty level value, the output position, the range, and the like of the transmitted ultrasonic wave in addition to the duty and the on / off time, It may be configured to adjust the intensity of the ultrasonic wave of the transmitter 32.

Subsequently, when comparing the received ultrasonic data with the second reference data, the controller 10 starts an anti-theft mode when the received ultrasonic waves correspond to the second reference data.

The alarm unit 50 outputs a failure signal by determining that the intrusion detection unit 30, which is the ultrasonic sensor, does not operate normally by the control unit 10, and transmits a warning sound signal to a speaker (not shown) provided in the vehicle. Causes the alarm to sound externally. In addition, the present invention may further include a communication unit (not shown) capable of communicating with an external device (not shown), and may transmit a failure signal output from the control unit 10 to the external device through the communication unit. The external device may be a driver's mobile phone or a security server's visible server.

4 is a flowchart illustrating a method of detecting an ultrasonic sensor failure and an ultrasonic intrusion detection function having a saturation prevention function according to an exemplary embodiment of the present invention. FIG. 5 is a flowchart illustrating an ultrasonic sensor according to an exemplary embodiment of the present invention. 6 is a view for explaining the saturation phenomenon occurs, Figure 6 is a view for explaining the prevention of the saturation phenomenon occurs in the receiver of the ultrasonic sensor according to the present invention.

4 to 6, in order to check whether the ultrasonic sensor is broken and prevent saturation, the controller 10 detects the OFF of the vehicle door, which is a structure, and theft when the OFF of the vehicle door is detected. The prevention mode event signal is output to the controller 10.

At this time, the control unit 10 is installed inside the vehicle, the passenger detection signal received from the pressure detection means (not shown) for determining the presence of a person by the pressure, the start detection signal for detecting the start of the vehicle, the door lock off ( OFF) can be configured so that the control unit 10 can be set to the anti-theft mode only when one signal of the door lock off signal is detected, and can be set to the anti-theft mode only when two or more of the signals are input. All three must be entered to be configured to set the anti-theft mode.

Subsequently, the controller 10 detects when the door lock is released by the door lock detector 40 and sets (starts) an anti-theft mode when the door lock OFF signal is input from the door lock detector 40.

 Then, after the anti-theft mode is started, the controller 10 controls the ultrasonic wave generator 31 of the intrusion detecting unit 30 to transmit the transmitted ultrasonic waves, and the ultrasonic receiver 33 receives the received ultrasonic waves in response to the transmitted ultrasonic waves. In order to control the reception of the control unit 10, the control unit 10 controls to turn on and off the transmission of the transmission ultrasonic waves a plurality of times (S213).

At this time, the controller 10 controls the duty on / off of the ultrasonic wave transmitted from the ultrasonic transmitter 32 to be repeated three times.

Then, the data of the received ultrasonic wave received by the ultrasonic receiver 33 due to the ON / OFF three times and the first reference data stored in the storage unit 20 are compared a plurality of times. It is checked (determined) whether the ultrasound data is included in the first reference data range (S214).

Here, the data of the received ultrasonic waves may be configured to be initially set by the circuit amplification factor (amplification factor preset signal amplification circuit) set in the ultrasonic receiver 33 or stored in the storage unit 20.

When the controller 10 checks (decides) that the received ultrasonic wave data is out of the first reference data, the controller 10 determines that the intrusion detection unit 30, which is the ultrasonic sensor, does not operate normally. If it does not operate normally, the failure signal is output to the alarm unit 50 (S215).

When the alarm unit 50 outputs a fault signal by determining that the intrusion detection unit 30, which is the ultrasonic sensor, does not operate normally, the alarm unit 50 generates a warning sound to a speaker (not shown) provided in the vehicle. Notifies the presence of failure of the ultrasonic sensor (or can be configured to output to the display device in the vehicle).

In this case, the failure signal output from the controller 10 may be transmitted to the driver's mobile phone or the security server of the security company through the communication unit (not shown).

Subsequently, when the controller 10 checks (determines) whether the received ultrasound data is included in the first reference data range, if the received ultrasound data is included in the first reference data range, the ultrasonic wave of the intrusion detection unit 30 is performed. It is determined that the sensor operates normally.

When the ultrasonic sensor, which is the intrusion detection unit 30, determines that the normal operation is performed, the control unit 10 sets the anti-theft mode, which is an initial setting (S216), controls the ultrasonic transmitter 32, and transmits transmission ultrasonic waves. Receives the received ultrasonic waves in response to the transmitted ultrasonic waves, the ultrasonic signal saturation detector 35 detects the data of the received ultrasonic waves received by the ultrasonic receiver 33, the controller 10 detects the data of the received ultrasonic waves second Comparison is made with reference data (reference value S217).

In this case, the controller 10 compares the received ultrasonic data with the second reference data and determines whether the received ultrasonic waves correspond to the second reference data (S218).

If the reception ultrasonic wave does not correspond to the second reference data, the controller 10 adjusts the radiation value of the transmission ultrasonic wave to adjust the transmission ultrasonic wave to the second reference data (S219).

The controller 10 controls the duty and the on / off time of the ultrasonic transmitter 32, and controls the ultrasonic transmitter 32 to match the set reference voltage of the ultrasonic receiver 33.

In detail, (see FIG. 5), in the basic anti-theft mode, the detection variation according to the increase and decrease of the signal is large (b). Due to the change in the position of the seat, or to increase or decrease the number of things in the vehicle, there are many cases where the sound pressure reflected from the vehicle may be greater than the basic state of the vehicle due to such external environmental factors.

In this case, since there is almost no change in detection according to the increase of the signal (a), the sound pressure level entering the ultrasonic receiver 33 is too fine, and in order to increase the signal level, the sound pressure level must be amplified to have a constant level value according to the size and state of the vehicle. do.

Thus, without adjusting the amplification factor of the ultrasonic receiver 33, the intensity of the ultrasonic wave transmitted by the ultrasonic transmitter 32 (see FIG. 6) is adjusted, and the controller 10 adjusts the ultrasonic transmitter to match the set reference voltage of the ultrasonic receiver 33. Control 32.

That is, when the controller 10 reads the Vrms value of the ultrasonic receiver 33 and determines that the internal environment has changed from the basic state, the controller 10 reduces the intensity of the transmitted ultrasonic wave, and reads the Vrms value of the ultrasonic receiver 33 to less than the basic state. And control (c) to increase the intensity of the transmitted ultrasonic wave of 32).

The controller 10 continuously controls the ultrasonic transmitter 32 to match the set reference voltage of the ultrasonic receiver 33, thereby preventing the saturation phenomenon from occurring at the ultrasonic receiver 33 in the anti-theft mode at all times.

100: Ultrasonic intrusion detection device having an ultrasonic sensor failure check and saturation prevention function
10: control unit 20: storage unit
30: intrusion detection unit 40: door lock detection unit
50: alarm unit

Claims (10)

An ultrasonic intrusion detection apparatus comprising an ultrasonic transmission unit for transmitting transmission ultrasonic waves,
A door lock detector configured to generate an anti-theft event signal;
When the anti-theft mode is started by the anti-theft mode event signal input from the door lock detection unit transmits the transmission ultrasonic waves to the interior of the structure, and receives the received ultrasonic waves in response to the transmitted ultrasonic waves, but the transmission of the ultrasonic transmission on a plurality of times ( An intrusion detection unit that is ON and OFF; And
When the plurality of times of the received ultrasonic wave and the first reference data is compared with a plurality of times, the comparison result, if the check is confirmed whether the data of the received ultrasonic wave in the preset first reference data range, the intrusion detection unit is normal A controller which determines to operate and determines that the intrusion detection unit does not operate normally when the received ultrasonic wave data is checked as being out of the preset first reference data; Including,
The control unit,
When the intrusion detection unit determines that the operation is normal, the anti-theft mode is started, and the received ultrasonic data is compared with the second reference data, but the received ultrasonic data does not correspond to the preset second reference data. And adjusting the transmission ultrasonic wave by adding or subtracting a radiation value of the transmission ultrasonic wave so as to correspond to second reference data.
The intrusion detection unit,
An ultrasonic generator for generating and transmitting ultrasonic waves;
An ultrasonic transmitter for transmitting an ultrasonic wave when the anti-theft mode starts in the vehicle;
An ultrasonic receiver configured to receive received ultrasonic waves in response to the transmitted ultrasonic waves;
Ultrasonic sensitivity measuring unit for measuring the sensitivity of the received ultrasonic wave; And
An ultrasonic signal saturation detector for comparing the received ultrasonic waves with second reference data; Including,
The radiation value is,
Ultrasonic intrusion detection device having a failure detection and saturation prevention function of the ultrasonic sensor, characterized in that it comprises one or more selected from among the duty value, level value, output position, range, and ON / OFF time of the ultrasonic transmission.
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The control unit generates a warning sound signal when determining that the intrusion detection unit does not operate normally,
An alarm unit configured to receive the alarm signal from the controller and output an alarm sound to the outside; Ultrasonic intrusion detection device having an ultrasonic sensor failure check and saturation prevention function.
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