JP2016220816A - Biological information detection method for vehicle and device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect a driver's biological information using a non-contact sensor without being affected by a noise signal generated by the vibration of a vehicle.SOLUTION: A biological information detection device for a vehicle includes: a first non-contact detection unit having a first transmission part for transmitting an electromagnetic wave from a back side of an occupant, a first reception part for receiving the electromagnetic wave reflected from the occupant, and a first synthesis part for synthesizing the transmitted electromagnetic wave and the received electromagnetic wave; a second non-contact detection unit having a second transmission part for transmitting an electromagnetic wave to the occupant from a breast side, a second reception part for receiving the electromagnetic wave reflected from the occupant, and a second synthesis part for synthesizing the transmitted electromagnetic wave and the received electromagnetic wave; and a processing unit having an addition part for adding a signal output from the first non-contact detection unit and a signal output from the second non-contact detection unit, and a processing part for processing the added signals and acquiring information on the occupant's respiration frequency and heart rate.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle biometric information detection method and apparatus for detecting biometric information of a passenger on a vehicle.

  Various studies have been made on detecting biological information during driving of an occupant seated on a vehicle seat, particularly a driver. For example, as a method for detecting an arousal state during driving, a method for detecting a driver's eyelid opening, a method for detecting pupil movement, and the like have been studied. In this case, a camera is used as a non-contact sensor to image the driver's face.

  In addition, regarding the detection of biological information during driving by a driver, Patent Document 1 discloses a non-contact potential detection unit that detects a body potential of a vehicle occupant without directly contacting the body of the vehicle occupant, and this non-contact. Vibration noise detection means for detecting vibration noise superimposed on the detection value detected by the potential detection means, and subtracting the detection value detected by the vibration noise detection means from the detection value detected by the non-contact potential detection means Describes the measurement of the electrocardiogram waveform of a vehicle occupant.

  Furthermore, Patent Document 2 obtains a composite wave of a transmission wave emitted from a sensor and a reflection wave reflected from a human body in which the transmission wave is in respiratory motion, and the presence of a human body in a vehicle is obtained from the envelope of the composite wave. A human body detection method for detecting in-vehicle is described.

JP 2011-24903 A JP 2003-66157 A

  When the driver's biometric information is detected using a non-contact sensor while driving the vehicle, the vibration of the driving vehicle is also detected and becomes a noise signal. This noise signal has become an obstacle for measuring accurate biological information (heart rate, respiratory rate, body movement) when a non-contact sensor is used.

  The vibration of the vehicle during driving changes its natural frequency (noise) depending on traveling speed, road surface condition, vehicle body rigidity, and the like, so it is difficult to remove noise due to filtering.

  In the electrocardiograph for a vehicle described in Patent Document 1, a method for measuring an electrocardiogram waveform of a vehicle occupant by subtracting a detection value detected by a vibration noise detection means from a detection value detected by a non-contact potential detection means However, since the vibration component is subtracted by the vibration noise detection means different from the non-contact potential detection means, the vibration timing detected by the vibration noise detection means and the human body are not contacted. Since the timing at which the influence of vibration actually appears on the potential detection means is shifted, the vibration noise component is completely removed even if the detection value detected by the vibration noise detection means is subtracted from the detection value detected by the non-contact potential detection means. It is difficult to remove.

  Further, in the in-vehicle human body detection method described in Patent Document 2, the presence of a human body in the vehicle is detected from an envelope of a composite wave of a transmission wave emitted from a sensor and a reflected wave reflected from the human body. This is based on the premise that the vehicle is stopped, and no consideration is given to eliminating the influence of vibration that occurs while the vehicle is running.

  The present invention can detect the biological information of the driver who is driving more accurately without being affected by the noise signal generated by the vibration of the vehicle when detecting the biological information of the driver using a non-contact sensor. It is an object of the present invention to provide a vehicle biological information detection method and apparatus.

  In order to solve the above-described problem, in the present invention, a first transmission unit that transmits an electromagnetic wave from the back side to the occupant seated on the vehicle seat is detected by the vehicle biological information detection device. And a first receiving unit that receives an electromagnetic wave reflected from a passenger by an electromagnetic wave transmitted from the first transmitting unit, an electromagnetic wave transmitted from the first transmitting unit, and an electromagnetic wave received by the first receiving unit. A first non-contact detection unit having a first synthesis unit to synthesize, a second transmission unit that transmits electromagnetic waves toward the passenger from the chest side to the passenger, and a transmission from the second transmission unit A second receiving unit that receives the electromagnetic wave reflected from the passenger by the generated electromagnetic wave, and a second combining unit that combines the electromagnetic wave transmitted from the second transmitting unit and the electromagnetic wave received by the second receiving unit. A second non-contact detection unit having a first non-contact detection An adder that adds the signal output from the unit and the signal output from the second non-contact detection unit, and the signal added by the adder is processed to obtain information on the respiratory rate and heart rate of the passenger And a processing unit having a processing unit.

  In order to solve the above-described problems, in the present invention, the vehicle biometric information detection device transmits a first electromagnetic wave from the back side to the occupant seated on the vehicle seat. A first receiving unit that receives an electromagnetic wave reflected from a passenger by an electromagnetic wave transmitted from the transmitting unit and the first transmitting unit, and an electromagnetic wave transmitted from the transmitting unit and an electromagnetic wave received by the receiving unit are combined. A first non-contact detection unit comprising: a second transmitter that transmits electromagnetic waves toward the passenger from the chest side to the passenger; and an electromagnetic wave transmitted from the second transmitter A second receiving unit that receives the electromagnetic wave reflected from the passenger by the second, a second combining unit that combines the electromagnetic wave transmitted from the second transmitting unit and the electromagnetic wave received by the second receiving unit. Non-contact detection unit and first non-contact detection A subtracting unit that subtracts the signal output from the knit and the signal output from the second non-contact detection unit, and a processing unit that processes the signal subtracted by the subtracting unit to obtain information on the movement of the passenger's body And configured.

  Furthermore, in order to solve the above-described problems, in the present invention, in the biometric information detection method for a vehicle, the first non-contact detection unit from the back side toward the occupant seated on the vehicle seat The first non-contact detection unit generates a signal obtained by synthesizing the received electromagnetic wave and the electromagnetic wave transmitted by receiving the electromagnetic wave reflected from the passenger by the transmitted electromagnetic wave by the first non-contact detection unit. Output from the second non-contact detection unit toward the passenger from the chest side to the passenger, and the second non-contact detection of the electromagnetic wave reflected from the passenger by the transmitted electromagnetic wave A signal obtained by combining the electromagnetic wave received and transmitted by the unit and the received electromagnetic wave is output from the second non-contact detection unit, and the signal output from the first non-contact detection unit and the second non-contact detection unit are output. And a signal output from Tsu preparative added and input to the processing unit, and to obtain the biometric information of the passenger and processes the sum signal.

  Furthermore, in order to solve the above-described problems, in the present invention, an electromagnetic wave is transmitted from the first non-contact detection unit toward the occupant seated on the vehicle seat from the back side to the occupant. The first non-contact detection unit outputs a signal obtained by synthesizing the received electromagnetic wave and the electromagnetic wave reflected from the passenger by the first non-contact detection unit. In contrast, an electromagnetic wave is transmitted from the second non-contact detection unit toward the passenger from the chest side, and the electromagnetic wave reflected from the passenger by the transmitted electromagnetic wave is received and transmitted by the second non-contact detection unit. A signal that combines the received electromagnetic wave and the received electromagnetic wave is output from the second non-contact detection unit, the signal output from the first non-contact detection unit and the signal output from the second non-contact detection unit The subtraction is input to the processing unit, and to obtain information about the movement of the passenger's body processes the subtraction signal.

  According to the present invention, while driving a vehicle, biological information such as breathing rate, heart rate, and body movement as biological information of the driver is not affected by vibration noise generated by driving the vehicle. Can be obtained without contact. This makes it possible to manage the physical condition of the driving driver and monitor the driver's sleep.

It is a fragmentary sectional view of vehicles showing the arrangement relation in the vehicles of the 1st non-contact detection unit and the 2nd non-contact detection unit concerning Example 1 of the present invention. It is a block diagram which shows the system configuration | structure of the biometric information detection apparatus for vehicles which concerns on Example 1 of this invention. It is a graph which shows the waveform of the detection signal output from the 1st non-contact detection unit or the 2nd non-contact detection unit in the biological information sensing device for vehicles concerning Example 1 of the present invention. It is a graph which shows the waveform of the detection signal output from the low-pass filter of the process part in the biometric information detection apparatus for vehicles which concerns on Example 1 of this invention. It is a graph which shows the waveform of the detection signal output from the band pass filter of the process part in the biometric information detection apparatus for vehicles which concerns on Example 1 of this invention. It is a block diagram which shows the system configuration | structure of the biometric information detection apparatus for vehicles which concerns on Example 2 of this invention. It is a block diagram which shows the system configuration | structure of the biometric information detection apparatus for vehicles which concerns on Example 3 of this invention.

  The present invention relates to a vehicle biological information detection device and a vehicle biological information detection method, and simultaneously transmits electromagnetic waves from a back side and a chest side to a passenger sitting on a vehicle seat by a non-contact detection unit. Then, the reflected wave is detected, and the signals output from the respective non-contact detection units are added or subtracted, and the filtering process is performed. Information such as movement can be obtained.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a configuration of a vehicular biological information detection apparatus using the non-contact sensor according to the first embodiment. The vehicle biological information detection apparatus using the non-contact sensor according to the present embodiment is fixedly attached to the back side of the urethane pad 103 of the seat back 102 on which the driver 10 sitting on the seat cushion 101 of the vehicle 150 leans back. The outputs of the first non-contact sensor 110, the second non-contact sensor 120 attached to, for example, the handle 104 in front of the driver 10, and the first non-contact sensor 110 and the second non-contact sensor 120 are received. And a processing unit 130 for detecting biological information.

  The first non-contact sensor 110 and the second non-contact sensor 120 use a radar that emits an electromagnetic wave that is used for inter-vehicle distance measurement. This radar passes through the clothes worn by the driver 10 and the urethane pad 103 of the seat back 102, and reflects off the surface and organs of the human body.

  When electromagnetic waves are emitted toward the chest of the driver sitting on the seat back 101 from the first non-contact sensor 110 fixedly attached to the back side of the urethane pad 103 of the seat back 102, the electromagnetic waves are reflected on the driver's back. Reflect on the heart, chest surface. A part of the reflected electromagnetic wave returns to the first non-contact sensor and is detected.

  While the vehicle 150 is traveling, the first non-contact sensor 110 continuously moves from the first non-contact sensor 110 toward the chest of the driver 10 who is seated on the seat cushion 101 and leans back on the seat back 102. When the electromagnetic wave is transmitted to, the phase of the reflected wave detected by the first non-contact sensor 110 changes with the positional fluctuation of the driver's 10 back, heart, and chest surfaces.

  On the other hand, since the phase of the electromagnetic wave transmitted from the first non-contact sensor 110 is constant, a beat signal is generated by the Doppler effect when the transmitted electromagnetic wave and the detected reflected wave are combined. When an ideal signal containing no noise component is detected in the beat signal, the displacement speed (respiration rate, heart rate, body movement) of each part of the body of the driver 10 is determined from the frequency of the beat signal. Information is obtained.

  However, when such a signal is detected in a running vehicle, the influence of random vibration of the vehicle is added, and various signal components are on the detected waveform, and the displacement of each part of the driver's body It is difficult to detect speed.

  On the other hand, the second non-contact sensor 120 attached to the handle 104 transmits an electromagnetic wave toward the chest of the driver 10 seated on the seat cushion 101 to detect a reflected wave from the driver 10 and transmits it. Even when the wave and the received wave are synthesized, various signal components are superimposed on the obtained beat signal as in the case of the first non-contact sensor 110, and the back, heart, and chest of the driver 10 are superimposed. Difficult to identify displacement.

  Here, the first non-contact sensor 110 and the second non-contact sensor 120 respectively transmit electromagnetic waves to substantially the same position of the driver 10 seated on the seat back 101. In this case, the movement of the body of the driver seated on the seat back 101 generated by the vibration of the vehicle is the first in the signal obtained by receiving the reflected wave from the driver by each non-contact sensor and combining it with the transmission wave. The first non-contact sensor 110 and the second non-contact sensor 120 are opposite in direction and appear in the same amount of change.

  In this embodiment, by using this feature, by canceling the noise component due to the vibration of the vehicle using the output signal from the first non-contact sensor 110 and the output signal from the second non-contact sensor 120, It is intended to more accurately detect the position fluctuations of the driver's back, heart, and chest surfaces.

FIG. 2 shows a detailed configuration of the vehicular biological information detection apparatus 100 according to the first embodiment.
The vehicular biological information detection apparatus according to the present embodiment is a first non-contact sensor 110 that detects reflected waves by transmitting electromagnetic waves to the driver 10 from the back side as shown in FIG. The driver 10 includes a second non-contact sensor 120 that detects an reflected wave by transmitting an electromagnetic wave from the chest side, and a processing unit 130.

  The first non-contact sensor 110 includes a transmitter 113, a transmission antenna 111, a reception antenna 112, and a combiner 114. A high-frequency signal (electromagnetic wave) generated by the transmitter 113 is transmitted from the transmitting antenna 111 to the driver 10 from the back side, and a reflected wave from the driver 10 is received by the receiving antenna 112 and transmitted by the combiner 114. The signal transmitted from the antenna 111 and the signal received by the receiving antenna 112 are combined, and the combined signal is output as an output signal 115 from the first non-contact sensor 110. The output signal 115 includes noise components due to vibrations of the vehicle 150 in addition to information on the movement of the chest in the longitudinal direction due to breathing by the driver 10 and information on the heartbeat. A signal waveform 301 having a disturbed peak value is obtained.

  The second non-contact sensor 120 includes a transmitter 123, a transmission antenna 121, a reception antenna 122, and a combiner 124. A high-frequency signal (electromagnetic wave) generated by the transmitter 123 is transmitted from the transmitting antenna 121 to the driver 10 from the chest side, and a reflected wave from the driver 10 is received by the receiving antenna 122 and transmitted by the combiner 124. The signal transmitted from the antenna 121 and the signal received by the receiving antenna 122 are combined, and the combined signal is output as the output signal 125 from the second non-contact sensor 120. This output signal 125 also includes noise components due to vibrations of the vehicle 150 in addition to information on the longitudinal movement of the chest due to the breathing of the driver 10 and information on the heartbeat, so the synthesis shown in FIG. Similar to the case of the signal 115, the signal waveform has a disturbed peak value.

  The processing unit 130 includes an adder 131, an amplifier 132, a low-pass filter 133, a first frequency detection circuit 134, a band-pass filter 135, and a second frequency detection circuit 136.

  The adder 131 inputs and adds the combined signal 115 output from the first non-contact sensor 110 and the combined signal 125 output from the second non-contact sensor 120, thereby adding the output signal 115 and the output signal. The information on the change in the chest thickness of the driver 10 (breathing information) and the heartbeat information generated at the same timing as 125 is emphasized, and the noise signal component generated by the vibration of the vehicle 150 is relative. Becomes smaller. In addition, by inputting the output signal 115 output from the first non-contact sensor 110 and the output signal 125 output from the second non-contact sensor 120 and adding them together, The movement can be offset.

  The noise signal generated by the vibration becomes relatively small, and the output signal from the adder 131 in which the information on the change in the chest thickness of the driver 10 (respiration information) and the heartbeat information is emphasized is an amplifier. One of the signals is input to the low-pass filter 133 and the other is input to the band-pass filter 135.

  In the signal input to the low-pass filter 133, a signal with an envelope waveform having a frequency of 50 times / minute or less passes, and a component with a frequency of which the envelope waveform exceeds 50 times / minute is blocked. The signal that has passed through the low-pass filter 133 has a waveform 401 as shown in FIG. 4, for example, and the frequency of the envelope waveform of the signal is detected by the detection circuit 134 and is detected as the respiratory rate of the driver 10.

  On the other hand, as for the signal input to the band pass filter 135, a signal having an envelope waveform with a frequency of 50 times / minute or more and 100 times / minute or less passes, and signals having other envelope waveforms are blocked. The signal that has passed through the band-pass filter 135 becomes a waveform 501 as shown in FIG. 5, for example, and the frequency of the envelope waveform of the signal is detected by the detection circuit 136 and detected as the pulse rate of the driver 10.

  In the example described above, the second non-contact sensor 120 is described as being installed on the handle 104. However, when the handle 104 does not have enough space to install the second non-contact sensor 120, the operation is performed. You may install in the dashboard (not shown) in front of the seat.

  According to the present embodiment, the driver's breathing rate, pulse rate, etc., without being affected by the driving state of the vehicle or the movement of the driver's body back and forth inside the vehicle being driven. Since biological information can be detected, a change in the physical condition of the driver can be detected to prevent an accident from occurring. In addition, it can be applied to the prevention of dozing by detecting the driver's doze from the state of changes in the respiratory rate and pulse rate of the driver and generating a warning sound.

  FIG. 6 shows the configuration of the vehicular biological information detection apparatus 200 based on the second embodiment. The difference from the configuration of the biological information detecting apparatus for a vehicle described in the first embodiment shown in FIG. 2 is that the adder 131 of the processing unit 130 in the first embodiment is changed to a subtractor in the processing unit 230 in the present embodiment. 231 is provided.

  In the configuration of the vehicle biological information detecting device 200 in the present embodiment shown in FIG. 6, the configurations and operations of the first non-contact sensor 110 and the second non-contact sensor 120 are the same as those described in the first embodiment. Since there is, description is abbreviate | omitted.

  In the processing unit 230 in this embodiment, the output signal 115 from the first non-contact sensor 110 and the output signal 125 from the second non-contact sensor 120 are input to the subtractor 231 and the output signal 125 is output from the output signal 115. Perform the subtraction process. Unlike the case of the first embodiment, the signal output from the subtractor 231 includes information on changes in the chest thickness of the driver 10 occurring at the same timing in the output signal 115 and the output signal 125 (respiration rate). Information) and heartbeat information disappear, and information on the movement of the driver 10 in the front-rear direction remains.

  The signal output from the subtractor 321 is amplified by the amplifier 232 and then input to the low-pass filter 233 to remove the high frequency noise component, and then the body motion of the driver 10 is detected by the frequency detection circuit 234. .

  According to the present embodiment, it is possible to detect the driver's drowsiness by detecting the movement of the driver's body back and forth, so that it can be applied to prevent a drowsiness by generating a warning sound, etc. can do.

  FIG. 7 shows the configuration of the vehicular biological information detection apparatus 300 based on the third embodiment. The present embodiment is a combination of the configuration described in the first embodiment and the configuration described in the second embodiment.

  In the configuration shown in FIG. 7, the configuration and operation of the first non-contact sensor 110 and the second non-contact sensor 120 are the same as those described in the first embodiment, and thus description thereof is omitted.

  The processing unit 330 includes a first processing unit 3301 including an adder 331 and a second processing unit 3302 including a subtractor 341.

  The first processing unit 3301 executes processing as described in the first embodiment, and is affected by the influence of the driving state of the vehicle and the movement of the driver's body back and forth inside the driving vehicle. In addition, the driver's biological information such as the driver's respiration rate and pulse rate can be detected.

  On the other hand, the second processing unit 3302 can perform the process described in the second embodiment to detect the forward / backward movement of the driver's body during driving.

  As a result, according to the present embodiment, the occurrence of an accident can be prevented by detecting changes in physical condition such as changes in the respiratory rate and pulse rate of the driver and body movement. In addition, the driver's breathing and pulse rate changes, body movements, and other various information can be used to detect the driver's drowsiness and to generate a warning sound. You can also.

  DESCRIPTION OF SYMBOLS 100,200,300 ... Biological information detection apparatus for vehicles 101 ... Seat cushion 102 ... Seat back 103 ... Urethane pad 104 ... Handle 110 ... First non-contact sensor 120 ... Second contact sensor 130, 230, 330 ... processing unit 131, 331 ... adder 133, 233, 333, 343 ... low pass filter 134, 136, 234, 334, 336, 344 .Detection circuit 135, 335... Band pass filter

Claims (16)

A first transmitter that transmits electromagnetic waves toward the passenger from the back side with respect to a passenger seated on a vehicle seat, and the electromagnetic waves transmitted from the first transmitter are reflected from the passenger A first non-contact detection unit having a first receiving unit that receives electromagnetic waves, a first combining unit that combines the electromagnetic waves transmitted from the first transmitting unit and the electromagnetic waves received by the first receiving unit. When,
A second transmitter for transmitting electromagnetic waves from the chest side toward the passenger to the passenger, and an electromagnetic wave reflected from the passengers by the electromagnetic waves transmitted from the second transmitter. A second non-contact detection unit having a second combining unit that combines the electromagnetic wave transmitted from the second receiving unit and the second transmitting unit and the electromagnetic wave received by the second receiving unit;
An adder for adding the signal output from the first non-contact detection unit and the signal output from the second non-contact detection unit, and the signal added by the adder to process the passenger's A biological information detection apparatus for a vehicle, comprising: a processing unit including a processing unit that obtains biological information.   The biological information detection apparatus for a vehicle according to claim 1, wherein the processing unit of the processing unit obtains information about the occupant's respiratory rate and heart rate as the biological information. Detection device.   The biological information detection apparatus for a vehicle according to claim 1 or 2, wherein the processing unit of the processing unit includes a filtering processing unit that performs a filtering process on the signal added by the adding unit. Information detection device.   The biological information detecting device for a vehicle according to claim 3, wherein the filtering processing unit of the processing unit includes a low-frequency signal and a low-pass filter that passes the signal, and a band-pass filter that passes the signal of a predetermined frequency band. A biological information detection device for vehicles characterized by the above.   The biological information detecting device for a vehicle according to claim 3, wherein the processing unit extracts information related to a respiration rate of the occupant from a signal that has passed through the low-pass filter, and the signal from the signal that has passed through the band-pass filter. A biological information detecting device for a vehicle, wherein information relating to a heart rate of a passenger is extracted.   3. The vehicle biometric information detection apparatus according to claim 1, wherein the first non-contact detection unit is mounted on a seat back of a seat on which the occupant is seated. Biological information detection device.   The biological information detection device for a vehicle according to claim 1 or 2, wherein the processing unit includes a signal output from the first non-contact detection unit and a signal output from the second non-contact detection unit. The vehicle biometric information detection further comprising: a subtracting unit that subtracts the signal; and a processing unit that performs filtering processing on the signal subtracted by the subtracting unit to extract information related to the movement of the occupant's body. apparatus. A first transmitter that transmits electromagnetic waves toward the passenger from the back side with respect to a passenger seated on a vehicle seat, and the electromagnetic waves transmitted from the first transmitter are reflected from the passenger A first non-contact detection unit comprising: a first receiving unit that receives electromagnetic waves; and a first combining unit that combines the electromagnetic waves transmitted from the transmitting unit and the electromagnetic waves received by the receiving unit;
A second transmitter for transmitting electromagnetic waves from the chest side toward the passenger to the passenger, and an electromagnetic wave reflected from the passengers by the electromagnetic waves transmitted from the second transmitter. A second non-contact detection unit comprising a second combining unit that combines the second receiving unit and the electromagnetic wave transmitted from the second transmitting unit and the electromagnetic wave received by the receiving unit;
The subtractor for subtracting the signal output from the first non-contact detection unit and the signal output from the second non-contact detection unit and the signal subtracted by the subtractor to process the passenger's A biological information detecting device for a vehicle, comprising: a processing unit that obtains information related to body movement. An electromagnetic wave is transmitted from the first non-contact detection unit toward the occupant seated on the vehicle seat from the back side, and the electromagnetic wave reflected from the occupant by the transmitted electromagnetic wave is A signal obtained by synthesizing the received electromagnetic wave and the electromagnetic wave received and transmitted by the first non-contact detection unit is output from the first non-contact detection unit,
An electromagnetic wave is transmitted from the second non-contact detection unit toward the occupant from the chest side to the occupant, and the electromagnetic wave reflected from the occupant by the transmitted electromagnetic wave is the second non-contact A signal obtained by synthesizing the received electromagnetic wave and the received electromagnetic wave received by the detection unit is output from the second non-contact detection unit,
The signal output from the first non-contact detection unit and the signal output from the second non-contact detection unit are input to the processing unit and added, and the added signal is processed to process the passenger's A biometric information detection method for a vehicle characterized by obtaining biometric information.   The biological information detection method for a vehicle according to claim 9, wherein the obtained biological information of the occupant is information on a respiratory rate and a heart rate.   The biometric information detection method for a vehicle according to claim 9 or 10, wherein the added signal is processed by filtering the added signal. .   The biological information detection method for a vehicle according to claim 11, wherein the filtering process is performed by passing a low-frequency signal using a low-pass filter and a signal in a predetermined frequency band. A biological information detection method for a vehicle, which is performed by passing the   13. The biological information detection method for a vehicle according to claim 12, wherein information relating to the occupant's respiration rate is extracted from a signal that has passed through the low-pass filter, and the occupant's heart rate is derived from the signal that has passed through the band-pass filter. The biological information detection method for vehicles characterized by extracting the information regarding.   The biometric information detection method for a vehicle according to claim 9 or 10, wherein the electromagnetic wave is transmitted to the occupant from the first non-contact detection unit mounted on a seat back of a seat on which the occupant is seated. A biological information detection method for a vehicle, characterized in that:   The biological information detection method for a vehicle according to claim 9 or 10, wherein a signal output from the first non-contact detection unit and a signal output from the second non-contact detection unit are subtracted. The vehicle biometric information detection method, wherein the subtracted signal is subjected to filtering processing to extract information relating to the movement of the occupant's body. An electromagnetic wave is transmitted from the first non-contact detection unit toward the occupant seated on the vehicle seat from the back side, and the electromagnetic wave reflected from the occupant by the transmitted electromagnetic wave is A signal obtained by synthesizing the received electromagnetic wave and the electromagnetic wave received and transmitted by the first non-contact detection unit is output from the first non-contact detection unit,
An electromagnetic wave is transmitted from the second non-contact detection unit toward the occupant from the chest side to the occupant, and the electromagnetic wave reflected from the occupant by the transmitted electromagnetic wave is the second non-contact A signal obtained by synthesizing the received electromagnetic wave and the received electromagnetic wave received by the detection unit is output from the second non-contact detection unit,
The signal output from the first non-contact detection unit and the signal output from the second non-contact detection unit are input to the processing unit and subtracted, and the subtracted signal is processed to process the passenger's A biological information detection method for a vehicle, characterized in that information on body movement is obtained.

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