JP2019037390A - Biological information detector, and sensor system for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a biological information detection device having a novel structure capable of easily and accurately detecting only a biological signal containing no noise from a sensor signal. A biological information detection device according to an embodiment is provided so as to support a sensor unit that detects biological information of a living body and outputs a sensor signal including a biological signal indicating the biological information, and the sensor unit. A support portion having a natural frequency in a frequency band different from the frequency band of the biological signal in the sensor signal is provided. [Selection diagram] Fig. 5

Description

  Embodiments described herein relate generally to a biological information detection apparatus and a vehicle sensor system.

  2. Description of the Related Art Conventionally, a biological information detection apparatus for detecting biological information related to body movement, respiration, heartbeat, and the like of a living body is known. Such a biological information detection apparatus may be mounted on a vehicle.

  When the biological information detection device is mounted on a vehicle, the biological signal indicating the biological information that is the original detection target is obtained by superimposing noise caused by the vibration of the vehicle on the sensor signal output from the biological information detection device. The signal may be buried.

Japanese Patent Laid-Open No. 2006-136989

  Therefore, it is desired to provide a biological information detection apparatus (and a vehicle sensor system including the same) having a novel structure that can easily and accurately detect only a biological signal that does not include noise from a sensor signal.

  A biological information detection device according to an aspect of an embodiment is provided, for example, to detect biological information of a biological body and output a sensor signal including a biological signal indicating the biological information, and to support the sensor unit. A support unit having a natural frequency in a frequency band different from the frequency band of the biological signal in the sensor signal. With this configuration, vibrations in various frequency bands transmitted from the outside to the biological information detection device are absorbed by the support unit, and only vibrations in a frequency band corresponding to the natural frequency of the support unit are transmitted to the sensor unit. . As a result, the frequency band of the noise in the sensor signal and the frequency band of the biological signal are separated, so that only the biological signal not containing noise can be easily and accurately detected from the sensor signal.

  In the biological information detecting apparatus according to the embodiment, for example, the natural frequency of the support portion is located in a frequency band lower than the frequency band of the biological signal. With this configuration, in the sensor signal, the noise frequency band can be shifted to a position lower than the biological signal frequency band.

  Moreover, in the biological information detection apparatus according to the embodiment, for example, the support part is configured by a gel-like member. With this configuration, the effect of separating the frequency band of noise in the sensor signal from the frequency band of the biological signal can be easily realized by the gel-like member.

  Moreover, the biological information detection apparatus according to the embodiment further includes, for example, a casing that houses the sensor unit, and the support unit configured by the gel-like member is provided so as to wrap the sensor unit in the casing. With this configuration, it is possible to easily suppress external vibration from being directly transmitted to the sensor unit.

  In addition, the biological information detection device according to the embodiment further includes, for example, a casing that houses the sensor unit, and the support unit is provided to support the sensor unit via the casing. Also with this configuration, it is possible to easily suppress external vibration from being directly transmitted to the sensor unit.

  A vehicle sensor system according to another aspect of the embodiment is a biological information detection device provided in a vehicle, detects biological information of the biological body, and outputs a sensor signal including a biological signal indicating the biological information. A biological information detection apparatus comprising: a sensor unit configured to support the sensor unit; and a support unit provided with a natural frequency in a frequency band different from the frequency band of the biological signal in the sensor signal. And a processing device that executes a process of providing a service according to the signal. With this configuration, vibrations in various frequency bands transmitted from the outside to the biological information detection device are absorbed by the support unit, and only vibrations in a frequency band corresponding to the natural frequency of the support unit are transmitted to the sensor unit. . As a result, since the frequency band of the noise in the sensor signal and the frequency band of the biological signal are separated, only the biological signal not including noise can be easily and accurately detected from the sensor signal. Services can be provided effectively.

FIG. 1 is an exemplary perspective view illustrating a state in which a part of a vehicle compartment of a vehicle according to the embodiment is seen through. FIG. 2 is an exemplary plan view (bird's-eye view) showing an appearance of the vehicle as viewed from above according to the embodiment. FIG. 3 is an exemplary block diagram showing a schematic configuration of the interior of the vehicle according to the embodiment. FIG. 4 is an exemplary schematic diagram showing an external configuration of the biological information sensor according to the embodiment. FIG. 5 is an exemplary schematic cross-sectional view showing an internal configuration of the biological information sensor according to the embodiment. FIG. 6 is an exemplary schematic diagram illustrating a configuration of a sensor unit of the biological information sensor according to the embodiment. FIG. 7 is an exemplary diagram for explaining a vibration isolation effect obtained by the biological information sensor according to the embodiment. FIG. 8 is an exemplary diagram illustrating an example of functions realized in the ECU according to the embodiment. FIG. 9 is an exemplary flowchart illustrating a series of processing executed when the first service is provided in the embodiment. FIG. 10 is an exemplary flowchart illustrating a series of processing executed when the second service is provided in the embodiment. FIG. 11 is an exemplary flowchart illustrating a series of processing executed when the third service is provided in the embodiment. FIG. 12 is an exemplary schematic cross-sectional view illustrating a configuration of a biological information sensor according to a first modification of the embodiment. FIG. 13 is an exemplary schematic cross-sectional view illustrating a configuration of a biological information sensor according to a second modification of the embodiment. FIG. 14 is an exemplary block diagram illustrating a configuration of a vehicle sensor system according to a third modification of the embodiment.

  Hereinafter, embodiments and modifications will be described with reference to the drawings. The configurations of the embodiments and modifications described below, and the operations and results (effects) brought about by the configurations are merely examples, and are not limited to the following descriptions.

<Embodiment>
First, a schematic configuration of the vehicle 1 according to the embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is an exemplary perspective view showing a state in which a part of a compartment 2a of a vehicle 1 according to the embodiment is seen through. FIG. 2 is an exemplary plan view (bird's eye view) showing an external appearance of the vehicle 1 according to the embodiment as viewed from above.

  As shown in FIG. 1, the vehicle 1 according to the embodiment has a passenger compartment 2 a in which a passenger (user) (not shown) gets. In the passenger compartment 2a, a steering section 4, an acceleration operation section 5, a braking operation section 6, a speed change operation section 7 and the like are provided in a state that a driver as a user can operate from the driver seat 2b.

  The steering unit 4 is a steering wheel that protrudes from a dashboard (instrument panel). The acceleration operation unit 5 is an accelerator pedal provided under the driver's feet. The braking operation unit 6 is a brake pedal provided under the driver's feet. The speed change operation unit 7 is a shift lever protruding from the center console.

  A monitor device 11 having a display device (display) 8 capable of outputting various images and a sound output device 9 capable of outputting various sounds is provided in the passenger compartment 2a. The monitor device 11 is provided at the center of the dashboard in the passenger compartment 2a in the vehicle width direction (left-right direction). The display device 8 includes an LCD (liquid crystal display), an OELD (organic electroluminescence display), and the like. For example, an image obtained by imaging the periphery of the vehicle 1 or the vehicle 1 viewed from above. It is configured to display various images. Note that an image obtained by imaging the periphery of the vehicle 1 is referred to as a peripheral image, and an image of the vehicle 1 viewed from above is referred to as an overhead image or a bird's-eye image.

  Here, in the display area of the display device 8 according to the embodiment, that is, the display screen, it is possible to detect the coordinates of the position where an indicator such as a finger or a stylus comes close (including contact) in the display screen. A touch panel 10 is provided. Thereby, the user can visually recognize an image displayed on the display screen of the display device 8 and can perform various operations by performing an input operation (for example, a touch operation) using an indicator on the touch panel 10. Can be entered.

  In the embodiment, the monitor device 11 may include various physical operation input units such as a switch, a dial, a joystick, and a push button. In the embodiment, another audio output device may be provided at a position different from the position of the monitor device 11 in the passenger compartment 2a. In this case, various types of sound information can be output from both the sound output device 9 and other sound output devices. In the embodiment, the monitor device 11 may be configured to display information related to various systems such as a navigation system and an audio system.

  As shown in FIGS. 1 and 2, the vehicle 1 according to the embodiment is a four-wheeled vehicle having two left and right front wheels 3 </ b> F and two right and left rear wheels 3 </ b> R. Hereinafter, for simplification, the front wheel 3F and the rear wheel 3R may be collectively referred to as a wheel 3. In the embodiment, the side slip angles of some or all of the four wheels 3 change (steer) according to the steering of the steering unit 4 or the like.

  The vehicle 1 has a plurality (two in the example of FIGS. 1 and 2) of imaging units 15a and 15b. The imaging unit 15 a is provided at the rear end 2 e of the vehicle body 2 (for example, below the rear trunk door 2 h) and images a region behind the vehicle 1. The imaging unit 15 b is provided at the front end 2 c (for example, a front bumper) of the vehicle body 2 and images a region in front of the vehicle 1. Hereinafter, for the sake of simplicity, the imaging units 15a and 15b may be collectively referred to as the imaging unit 15.

  The imaging unit 15 is a so-called digital camera having an imaging element such as a CCD (charge coupled device) or a CIS (CMOS (complementary metal oxide semiconductor) image sensor). The imaging unit 15 captures the surroundings of the vehicle 1 at a predetermined frame rate, and outputs image data of a captured image obtained by the imaging. Image data obtained by the imaging unit 15 can constitute a moving image as a frame image. The image data obtained by the imaging unit 15 can be used to detect a three-dimensional object existing around the vehicle 1. The three-dimensional object includes a stationary object such as another parked vehicle or a moving object such as a moving pedestrian.

  In the embodiment, an imaging unit similar to the imaging units 15a and 15b may be further added at a position different from the imaging units 15a and 15b. In this case, the additional imaging unit may be provided on the side surface of the vehicle body 2 so that the side of the vehicle 1 can be imaged.

  Further, the vehicle 1 has a plurality of distance measuring sensors 16a and 16b (two in the example of FIGS. 1 and 2). The distance measuring sensor 16 a is provided at the rear end 2 e of the vehicle body 2 and detects the distance to the three-dimensional object existing behind the vehicle 1. The distance measuring sensor 16 b is provided at the front end 2 c of the vehicle body 2 and detects the distance to the three-dimensional object existing in front of the vehicle 1. In addition, about the definition of the solid thing referred here, it is the same as that of what was mentioned above. Hereinafter, for the sake of simplicity, the distance measuring sensors 16a and 16b may be collectively referred to as the distance measuring sensor 16.

  The distance measuring sensor 16 emits light such as laser light and receives light reflected from a three-dimensional object existing around the vehicle 1. Then, the distance measuring sensor 16 detects (specifies and calculates) the distance from the vehicle 1 to the obstacle based on the light reception result of the reflected light from the three-dimensional object. Similar to the imaging unit 15 described above, in the embodiment, a distance measuring sensor similar to the distance measuring sensors 16a and 16b may be further added at a position different from the distance measuring sensors 16a and 16b.

  Here, in the embodiment, as shown in FIG. 2, the biological information sensor 17 is provided in the vehicle 1. Although details will be described later, the biological information sensor 17 transmits an electromagnetic wave, an ultrasonic wave, or the like to a detection target (occupant of the vehicle 1), and senses the degree of transmission, reflection, absorption, etc. of the signal, thereby detecting the target. This device outputs a sensor signal including a biological signal indicating biological information such as body movement, respiration, and heartbeat.

  In the following, an example in which the biological information sensor 17 is provided in the ceiling portion of the passenger compartment 2a will be described. However, in the embodiment, the biological information sensor 17 may be provided in a portion such as a dashboard or a seat. Hereinafter, an example in which the biological information sensor 17 is provided at a position corresponding to the driver's seat 2b in order to detect the driver's biological information will be described. However, in the embodiment, the biological information sensor 17 is other than the driver. In order to detect the biometric information of the occupant, it may be provided at another position that does not correspond to the driver's seat 2b. Furthermore, in the embodiment, a plurality of biological information sensors 17 may be provided.

  Next, the internal configuration of the vehicle 1 according to the embodiment will be described with reference to FIG. FIG. 3 is an exemplary block diagram illustrating a schematic configuration inside the vehicle 1 according to the embodiment.

  As shown in FIG. 3, the vehicle 1 according to the embodiment includes a monitor device 11, a steering system 13, an imaging unit 15, a distance measuring sensor 16, a biological information sensor 17, a brake system 18, and a steering angle. A sensor 19, an accelerator sensor 20, a shift sensor 21, a wheel speed sensor 22, and an ECU (Electronic Control Unit) 24 are provided.

  The monitor device 11, the steering system 13, the distance measuring sensor 16, the biological information sensor 17, the brake system 18, the steering angle sensor 19, the accelerator sensor 20, the shift sensor 21, the wheel speed sensor 22, and the ECU 24 are on-vehicle communication lines. It is electrically connected via the network 23. The in-vehicle network 23 is configured by a CAN (controller area network), for example.

  The steering system 13 is an electric power steering system, an SBW (steer-by-wire) system, or the like. The steering system 13 includes an actuator 13a and a torque sensor 13b. The steering system 13 steers a part or all of the wheels 3 by operating the actuator 13a under the control of the ECU 24, which will be described later. The torque sensor 13 b detects torque generated in response to the operation of the steering unit 4 by the driver, and transmits the detection result to the ECU 24.

  The brake system 18 includes an ABS (anti-lock brake system), a skid prevention device (ESC), an electric brake system, a BBW (brake-by-wire), and the like. The brake system 18 includes an actuator 18a and a brake sensor 18b. The brake system 18 applies a braking force to the wheel 3 by operating the actuator 18a under the control of the ECU 24, which will be described later. The brake sensor 18b detects the position (displacement) of the brake pedal as a movable part in the braking operation unit 6, and transmits the detection result to the ECU 24.

  The steering angle sensor 19 is a sensor that detects an operation amount of the steering unit 4 by the driver. For example, the rudder angle sensor 19 is configured by a hall element or the like, detects the rotation angle of the rotating portion of the steering unit 4 as a steering amount, and transmits the detection result to the ECU 24. The accelerator sensor 20 detects the position (displacement) of an accelerator pedal as a movable part in the acceleration operation unit 5 and transmits the detection result to the ECU 24.

  The shift sensor 21 detects the position of a movable part such as a shift lever in the speed change operation part 7 and transmits the detection result to the ECU 24. The wheel speed sensor 22 detects the amount of rotation of the wheel 3, the number of rotations of the wheel 3 per unit time, and transmits the detection result to the ECU 24.

  The ECU 24 is usually a CPU (Central Processing Unit) 24a, ROM (Read Only Memory) 24b, RAM (Random Access Memory) 24c, Display Control Unit 24d, Audio Control Unit 24e, SSD (Solid State Drive) 24f, etc. It has the same hardware configuration as that of the computer.

  The CPU 24a is a control unit that controls the entire vehicle 1. The CPU 24a reads out a program stored in a storage device such as the ROM 24b or the SSD 24f, and executes various processes by operating in accordance with instructions included in the program. The RAM 24c is used as a work area when the CPU 24a executes various processes, for example.

  The display control unit 24d controls image output via the display device 8. The voice control unit 24e controls voice output via the voice output device 9.

  In the ECU 24 according to the embodiment, the CPU 24a, the ROM 24b, and the RAM 24c may be mounted on one integrated circuit. Moreover, in ECU24 by embodiment, it replaces with CPU24a as a control part which controls the vehicle 1 whole, processors, logic circuits, etc., such as DSP (digital signal processor), may be provided.

  In the embodiment, an HDD (Hard Disk Drive) may be provided instead of (or in addition to) the SSD 24f as a main storage device that stores programs executed by the CPU 24a. Furthermore, in the embodiment, the external device connected to the ECU 24 may have an SSD 24f as a main storage device.

  With the above configuration, the ECU 24 generally controls each part of the vehicle 1 by transmitting a control signal to each part of the vehicle 1 via the in-vehicle network 23. At this time, the ECU 24 can use image data obtained from the imaging unit 15, detection results of various sensors acquired via the in-vehicle network 23, and the like for control. The ECU 24 can also use information related to an input operation using the touch panel 10 acquired via the in-vehicle network 23 for control.

  By the way, as described above, the biological information sensor 17 is a device that outputs, as a result of sensing, a sensor signal corresponding to biological information related to body movement, breathing, heartbeat, and the like of a human (occupant of the vehicle 1). For this reason, in general, the output level of the sensor signal from the biological information sensor 17 is very small. Therefore, in the configuration as in the embodiment in which the biological information sensor 17 is provided in the vehicle 1, noise caused by the vibration of the vehicle 1 is superimposed on the sensor signal from the biological information sensor 17. There is a possibility that a biological signal indicating biological information that is an original detection target included is buried in noise.

  Therefore, in the embodiment, by configuring the biological information sensor 17 as follows, even in an environment in which noise due to vibration occurs, the influence of the noise is removed and the detection target is the original detection target. Realization of accurate detection of biological signals.

  FIG. 4 is an exemplary schematic diagram illustrating an external configuration of the biological information sensor 17 according to the embodiment. FIG. 5 is an exemplary schematic sectional view showing the internal configuration of the biological information sensor 17 according to the embodiment. FIG. 6 is an exemplary and schematic diagram showing the configuration of the sensor unit 172 of the biological information sensor 17 according to the embodiment.

  As shown in FIGS. 4 and 5, the biological information sensor 17 according to the embodiment is configured by housing a rectangular plate-shaped sensor unit 172 in a casing 171 having a rectangular parallelepiped outer shape. The sensor unit 172 is accommodated in a casing 171 fixed to the ceiling 500 of the passenger compartment 2a in a state of being supported (wrapped) by a support unit 173 having predetermined elasticity. In FIG. 4, the support portion 173 is not shown for ease of viewing.

  As shown in FIG. 6, a plurality of communication modules 172 a to 172 d are provided on the surface of the sensor unit 172. The plurality of communication modules 172a to 172d function as antennas for transmitting and receiving electromagnetic waves and ultrasonic waves.

  As shown in FIGS. 4 to 6, the sensor unit 172 includes a casing 171 fixed to the ceiling 500 of the passenger compartment 2a such that the surface on which the communication modules 172a to 172d are provided faces the passenger in the passenger compartment 2a. Is housed inside. Thereby, the biological information sensor 17 transmits electromagnetic waves, ultrasonic waves, and the like to the detection target (occupant of the vehicle 1) via the communication modules 172a to 172d provided in the sensor unit 172, and transmits or reflects the signal. By sensing the degree of absorption, a sensor signal including a biological signal indicating biological information such as body movement, respiration, and heartbeat of the detection target is output.

  Here, in the embodiment, the support portion 173 has a natural frequency in a frequency band different (distant) from the frequency band of the biological signal in the sensor signal output from the sensor unit 17 and has a relatively small spring constant. It is comprised by the gel-like member of material. Accordingly, in the embodiment, as described below, the vibration of the vehicle 1 at various frequencies transmitted from the ceiling 500 to the casing 171 is absorbed by the support portion 173, and the natural vibration of the support portion 173 is absorbed by the sensor portion 172. Only vibration at a frequency corresponding to the number is transmitted.

  FIG. 7 is an exemplary diagram for explaining the vibration isolation effect obtained by the biological information sensor 17 according to the embodiment. 7A corresponds to the detection result of the biological information sensor according to the comparative example that does not have the support portion 173 as in the embodiment, and FIG. 7B corresponds to the detection result of the biological information sensor according to the embodiment. This corresponds to 17 detection results.

  As shown in FIG. 7A, in the comparative example that does not have the support portion 173, the noise caused by the vibration of the vehicle 1 is evenly distributed over the entire frequency band including the frequency band of the biological signal that is the original detection target. It is superimposed. That is, in the comparative example, the biological signal is buried in noise. Therefore, in the comparative example, it is difficult to accurately detect only the biological signal from the sensor signal including noise and the biological signal.

  On the other hand, as shown in FIG. 7B, in the embodiment having the support portion 173, the noise caused by the vibration of the vehicle 1 is more specifically a frequency band lower than the frequency band of the biological signal. Specifically, the frequency band corresponding to the natural frequency F of the support portion 173 is collected. That is, in the embodiment, the frequency band of the noise and the frequency band of the biological signal are separated. Therefore, according to the embodiment, it is possible to easily and accurately detect only the biological signal from the sensor signal including noise and the biological signal.

  As described above, according to the embodiment, even in an environment in which noise due to vibration is generated, the influence of the noise can be removed, and the biological signal that is the original detection target can be accurately detected. .

  By the way, from the biological signal, it is possible to estimate the mood of the living body, confirm the presence of the living body, and the like. Therefore, if the biological information sensor 17 capable of detecting the biological signal with high accuracy is used, the vehicle 1 It is possible to effectively provide various services.

  For example, if estimation of a living body's mood based on a biological signal is performed while the vehicle 1 is traveling, it is effective to enhance the comfort of the vehicle 1 such as playing various music in accordance with the mood of the passenger in the vehicle 1. It is possible to provide a service (hereinafter referred to as a first service).

  In addition, if the presence check of the living body based on the biological signal is executed when the vehicle 1 starts, the seat belt reminder is executed only on the seat where the presence of the living body is confirmed. Service (hereinafter referred to as a second service) can be provided.

  Further, if the presence of a living body based on a biological signal is checked when no occupant is present in the vehicle 1 such as when parked, an alarm is output when an intruder is detected, which is effective for improving security. It is possible to provide a service (hereinafter referred to as a third service).

  Therefore, in the embodiment, by causing the CPU 24a of the ECU 24 to execute software (control program) stored in the ROM 24b, the SSD 24f, and the like, various embodiments corresponding to biological information such as the first to third services described above are provided. A function for providing a service is realized in the ECU 24.

  FIG. 8 is an exemplary diagram illustrating an example of functions realized in the ECU 24 according to the embodiment. As shown in FIG. 8, in the embodiment, when a service corresponding to biological information is provided, a sensor data acquisition unit 801 and a service processing unit 802 are realized in the ECU 24. In the embodiment, a part or all of the functions shown in FIG. 8 may be realized by dedicated hardware (circuit).

  The sensor data acquisition unit 801 acquires a sensor signal output from the biological information sensor 17. Note that the sensor data acquisition unit 801 can acquire not only the sensor signal but also the detection results of other sensors provided in the vehicle 1.

  The service processing unit 802 extracts the biological signal indicating the biological information from the sensor signal acquired by the sensor data acquisition unit 801, and controls each unit of the vehicle 1 according to the extraction result, whereby the first to third described above. The process for providing various services according to the biometric information, such as the above service, is executed.

  Note that the first to third services described above are merely examples, and in the embodiment, provision of services other than the first to third services described above can also be realized. However, for simplification, the following description will focus on the first to third services described above, and the flow of processing executed by the sensor data acquisition unit 801 and the service processing unit 802 when each service is provided will be described. To do.

  FIG. 9 is an exemplary flowchart illustrating a series of processing executed when the first service is provided in the embodiment. The processing flow shown in FIG. 9 is executed while the vehicle 1 is traveling, for example.

  In the processing flow shown in FIG. 9, first, in S <b> 901, the sensor data acquisition unit 801 acquires a sensor signal from the biological information sensor 17.

  In step S <b> 902, the service processing unit 802 analyzes a body motion signal including information related to the movement of the occupant from the sensor signal acquired in step S <b> 901.

  In step S903, the service processing unit 802 determines whether the body motion signal has been confirmed by the processing in step S902.

  If it is determined in S903 that the body motion signal cannot be confirmed, the process proceeds to S904. In step S904, the service processing unit 802 analyzes a respiratory signal including information related to the breathing of the occupant from the sensor signal acquired in step S901.

  In step S905, the service processing unit 802 determines whether a respiratory signal has been confirmed by the processing in step S904.

  If it is determined in S905 that the respiratory signal could not be confirmed, the process returns to S902, and the body movement signal is analyzed again. On the other hand, if it is determined in S905 that the respiratory signal has been confirmed, the process proceeds to S906. If it is determined in S903 that the body motion signal has been confirmed, the process proceeds to S906.

  In step S906, the service processing unit 802 analyzes a heartbeat signal including information on the occupant's heartbeat from the sensor signal acquired in step S901.

  In step S907, the service processing unit 802 estimates the occupant's mood based on the analysis results thus far. That is, since the two types of signals, the body motion signal and the respiratory signal, and the heartbeat signal are obtained by the processing before S907, the service processing unit 802 is based on these two types of signals. To estimate the occupant's mood.

  In step S908, the service processing unit 802 controls each unit of the vehicle 1 so as to provide a service corresponding to the estimation result in step S907. For example, the service processing unit 802 controls the voice control unit 24e to output music from the voice output device 9 according to the occupant's mood. Then, the process ends.

  In this way, a series of processes executed when the first service is provided in the embodiment is completed.

  FIG. 10 is an exemplary flowchart illustrating a series of processing executed when the second service is provided in the embodiment. The processing flow shown in FIG. 10 is executed when the vehicle 1 starts, for example.

  In the processing flow shown in FIG. 10, first, in S <b> 1001, the sensor data acquisition unit 801 acquires a sensor signal from the biological information sensor 17.

  In step S <b> 1002, the service processing unit 802 analyzes the sensor signal acquired in step S <b> 1001 and confirms a seat where an occupant is present.

  In S1003, the service processing unit 802 determines whether the seat belt is worn based on the detection result of a sensor (not shown) provided on the buckle of the seat belt, for example, for the seat in which the presence of an occupant is confirmed in S1002. Judge whether or not.

  In S1003, when it is determined that the seat belt is worn, the processing ends as it is. On the other hand, if it is determined in S1003 that the seat belt is not worn, the process proceeds to S1004.

  In step S1004, the service processing unit 802 outputs a seat belt reminder toward a seat where the seat belt is not worn. As a method of the seat belt reminder, for example, a method of outputting a notification that prompts the user to wear the seat belt by voice, light, vibration, or the like can be considered. Then, the process ends.

  In this way, a series of processes executed when the second service is provided in the embodiment is completed.

  FIG. 11 is an exemplary flowchart illustrating a series of processing executed when the third service is provided in the embodiment. The processing flow shown in FIG. 11 is executed, for example, when the vehicle 1 is parked.

  Note that when the vehicle 1 is parked, power generation using the power of the engine cannot be performed. Therefore, the processing flow shown in FIG. 11 is a solar power generation device (which can be provided on the battery or the roof of the vehicle 1). This is executed based on electric power supplied from an unillustrated).

  In the processing flow shown in FIG. 11, first, in S <b> 1101, the sensor data acquisition unit 801 acquires a sensor signal from the biological information sensor 17.

  In step S1102, the service processing unit 802 analyzes the sensor signal acquired in step S1101 and determines whether an intruder has been detected based on the analysis result. For example, if the sensor signal acquired in S1101 includes any biological signal, it can be considered that an intruder on the vehicle 1 has entered the vehicle 1, and in this case, the service processing unit 802 detects the intruder. Judge that it was done.

  If it is determined in S1102 that an intruder has not been detected, the process ends. On the other hand, if it is determined in S1102 that an intruder has been detected, the process proceeds to S1103.

  In step S1103, the service processing unit 802 outputs an alarm using voice, light, vibration, or the like. Thereby, a warning can be given to an intruder. Then, the process ends.

  In this way, a series of processes executed when the third service is provided in the embodiment is completed.

  As described above, the biological information sensor 17 according to the embodiment detects the biological information of the biological body, and outputs the sensor signal including the biological signal indicating the biological information, and the sensor unit 172 is supported. And a support portion 173 having a natural frequency in a frequency band different from the frequency band of the biological signal in the sensor signal. With this configuration, vibrations in various frequency bands transmitted from the outside to the biological information sensor 17 are absorbed by the support unit 173, and only vibrations in a frequency band corresponding to the natural frequency of the support unit 173 are transmitted to the sensor unit 172. It will be. As a result, the frequency band of the noise in the sensor signal and the frequency band of the biological signal are separated, so that only the biological signal not containing noise can be easily and accurately detected from the sensor signal.

  Further, as described above, in the biological information sensor 17 according to the embodiment, the natural frequency of the support portion 173 is set to be located in a frequency band lower than the frequency band of the biological signal. With this setting, in the sensor signal, the frequency band of noise can be shifted to a position lower than the frequency band of the biological signal.

  In addition, as described above, in the biological information sensor 17 according to the embodiment, the support portion 173 is configured by a gel-like member. With this configuration, the effect of separating the frequency band of noise in the sensor signal from the frequency band of the biological signal can be easily realized by the gel-like member.

  Moreover, as described above, the biological information sensor 17 according to the embodiment further includes the casing 171 that houses the sensor unit 172, and the support unit 173 configured by the gel-like member wraps the sensor unit 172 within the casing 171. Is provided. With this configuration, it is possible to easily suppress external vibration from being directly transmitted to the sensor unit 172.

<First Modification>
In the above-described embodiment, the configuration in which the support portion 173 encloses the sensor portion 172 in the casing 171 is illustrated (see FIG. 5). It is not restricted to the structure illustrated in (1). Hereinafter, a first modification as an example of another configuration capable of obtaining the same vibration isolation effect as the embodiment will be described.

  FIG. 12 is an exemplary schematic cross-sectional view showing a configuration of a biological information sensor 1200 according to a first modification of the embodiment. As shown in FIG. 12, the biological information sensor 1200 according to the first modification includes a casing 1201, a sensor unit 1202, and a support unit 1203.

  The sensor unit 1202 according to the first modification is configured in the same manner as the sensor unit 172 according to the embodiment. However, in the first modification, unlike the embodiment, the sensor unit 1202 is directly accommodated (attached) in the casing 1201.

  Further, like the support portion 173 according to the embodiment, the support portion 1203 according to the first modification is configured by an elastic member such as a gel-like member having a natural frequency in a frequency band different from the frequency band of the biological signal. Has been.

  Here, in the first modification, the support part 1203 is provided between the casing 1201 in which the sensor part 1202 is accommodated and the ceiling 500 of the passenger compartment 2a. In other words, in the first modification, the support portion 1203 is provided so as to support the sensor portion 1202 via the casing 1201.

  Even with the configuration of the first modified example, the vibration of the vehicle 1 at various frequencies transmitted from the ceiling 500 to the biological information sensor 1200 is absorbed by the support unit 1203, and the sensor unit 1202 has a characteristic of the support unit 1203. Only vibration at a frequency corresponding to the frequency is transmitted.

  Therefore, according to the first modification, as in the embodiment, the sensor signal output from the sensor unit 1202 is obtained by separating the frequency band of noise and the frequency band of the biological signal. Therefore, it is possible to easily and accurately detect only a biological signal that does not contain noise.

<Second Modification>
Moreover, in embodiment (and 1st modification) mentioned above, the example which comprises the support part 173 (and support part 1203) as a structure for obtaining the vibration isolation effect was shown by the gel-like member. However, as in the second modification described below, the configuration for obtaining the vibration isolation effect may not be a gel-like member.

  FIG. 13 is an exemplary schematic cross-sectional view showing a configuration of a biological information sensor 1300 according to a second modification of the embodiment. As illustrated in FIG. 13, the biological information sensor 1300 according to the second modification includes a casing 1301, a sensor unit 1302, a support unit 1303, and a fixing unit 1304.

  The sensor unit 1302 according to the second modification is configured in the same manner as the sensor unit 172 according to the embodiment. However, in the second modification, unlike the embodiment, the sensor unit 1302 is directly accommodated (attached) in the casing 1301.

  Here, in the 2nd modification, the support part 1303 is comprised by the spring member. The support portion 1303 constituted by this spring member is designed with a spring constant or the like so as to have a natural frequency in a frequency band different from the frequency band of the biological signal.

  In the second modification, the support portion 1303 is fixed to the casing 1301 and the fixing portion 1304 attached to the ceiling 500 outside the casing 1301. Thereby, in the 2nd modification, support part 1303 is provided so that sensor part 1302 may be supported via casing 1301. FIG.

  Even in the configuration of the second modified example, the vibration of the vehicle 1 at various frequencies transmitted from the ceiling 500 to the biological information sensor 1300 is absorbed by the support unit 1303, and the sensor unit 1302 has a characteristic of the support unit 1303. Only vibration at a frequency corresponding to the frequency is transmitted.

  Therefore, according to the second modification, as in the embodiment, the sensor signal output from the sensor unit 1302 is obtained by separating the frequency band of the noise and the frequency band of the biological signal. Therefore, it is possible to easily and accurately detect only a biological signal that does not contain noise.

<Third Modification>
Furthermore, in the above-described embodiment, an example in which the ECU 24 that comprehensively controls the vehicle 1 performs processing according to biological information (for example, the above-described processing for providing the first to third services) has been described. However, as in the third modification described below, the configuration that executes the process according to the biological information may not be the ECU 24.

  FIG. 14 is an exemplary block diagram illustrating a configuration of a vehicle sensor system 1400 according to a third modification of the embodiment. As shown in FIG. 14, the vehicle sensor system 1400 according to the third modification includes a biological information sensor 1401 and a processing device 1402.

  In the third modification, the biological information sensor 1401 is configured similarly to the biological information sensor 17 according to the embodiment. However, unlike the embodiment, the third modified example is configured such that the processing according to the biological information is executed by the processing device 1402 in the vehicle sensor system 1400 instead of the ECU 24 of the vehicle 1.

  That is, in the third modification, the processing device 1402 in the vehicle sensor system 1400 extracts a biological signal (biological information) from the sensor signal output from the biological information sensor 1401. Then, the processing device 1402 drives various actuators 1403 provided on the vehicle 1 based on the extracted biological signal, for example, biological information such as the processing for providing the first to third services described above. The process according to is executed.

  As described above, the vehicle sensor system 1400 according to the third modification includes the biological information sensor 1401 and the processing device 1402 that executes a process of providing a service in the vehicle 1 according to the detection result of the biological information sensor 1401. Prepare. Since the biological information sensor 1401 according to the third modification has the same configuration as the biological information sensor 17 according to the embodiment, according to the third modification, only a biological signal not including noise can be easily obtained from the sensor signal. And it can detect with high precision and can provide the service according to a biological signal effectively.

  As mentioned above, although embodiment and the modification of this invention were described, embodiment and the modification which were mentioned above are an example to the last, Comprising: It is not intending limiting the range of invention. The above-described novel embodiments and modifications can be implemented in various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. The above-described embodiments and modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

1 Vehicle 17, 1200, 1300 Biological information sensor (biological information detection device)
24 ECU (Processor)
171, 1201, 1301 Casing 172, 1202, 1302 Sensor unit 173, 1203, 1303 Support unit 1400 Vehicle sensor system 1402 Processing device

Claims (6)

A sensor unit that detects biological information of the biological body and outputs a sensor signal including a biological signal indicating the biological information;
A support unit provided to support the sensor unit and having a natural frequency in a frequency band different from the frequency band of the biological signal in the sensor signal;
A biological information detection device comprising: The natural frequency of the support is located in a frequency band lower than the frequency band of the biological signal,
The biological information detection apparatus according to claim 1. The support part is constituted by a gel-like member,
The biological information detection apparatus according to claim 1 or 2. A casing that houses the sensor unit;
The support part constituted by the gel-like member is provided so as to wrap the sensor part in the casing.
The biological information detection apparatus according to claim 3. A casing that houses the sensor unit;
The support part is provided to support the sensor part via the casing.
The biological information detection apparatus according to any one of claims 1 to 3. A biological information detection device provided in a vehicle, which is provided so as to support a sensor unit that detects biological information of a biological body and outputs a sensor signal including a biological signal indicating the biological information, A biological information detection device comprising: a support unit having a natural frequency in a frequency band different from the frequency band of the biological signal in the sensor signal;
A processing device for executing processing for providing a service corresponding to the biological signal in the vehicle;
A vehicle sensor system.

Images