Biometric information acquisition system, biological information acquisition method, and program

Abstract

To highly accurately acquire biological information of an occupant of a vehicle.SOLUTION: A biological information acquisition system comprises: a heart beat sensor which acquires a heart beat signal corresponding to the heart beat of an occupant of a vehicle; a body motion sensor which acquires a body motion signal corresponding to the body motion of the occupant; a vehicle information acquisition unit which acquires vehicle information including information about the acceleration / deceleration of the vehicle; a first specification unit which specifies a body motion time zone in which the body motion of the occupant is larger than a prescribed reference movement amount on the basis of the body motion signal; a second specification unit which specifies an acceleration / deceleration time zone in which the vehicle accelerates in the acceleration speed larger than a prescribed reference acceleration speed or the vehicle decelerates in a deceleration speed larger than a prescribed reference deceleration speed on the basis of the vehicle information; and a calculation unit which calculates a heart beat interval of the occupant on the basis of the heart beat signal acquired in a stationary time zone that does not include the body motion time zone and the acceleration / deceleration time zone.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a biometric information acquisition system, a biometric information acquisition method, and a program. [Background technology]

[0002] In recent years, technology for acquiring biological information related to the heart rate of a passenger has been used in vehicle driving assistance systems, etc. For example, a technology for calculating a heart rate from which noise generated during driving has been removed based on a heart rate detected when the vehicle is stopped has been disclosed (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-3245 Summary of the Invention [Problem to be solved by the invention]

[0004] In order to obtain biometric information of a vehicle occupant with high accuracy, it is necessary to suppress the effects of bodily movements other than the occupant's pulse (heart movement) (e.g., movements due to vehicle vibrations, movements based on the occupant's will, etc.).

[0005] An object of the present invention is to provide a biometric information acquiring system, a biometric information acquiring method, and a program that are capable of acquiring biometric information of a vehicle occupant with high accuracy. [Means for solving the problem]

[0006] A biometric information acquisition system according to one embodiment of the present invention includes a heart rate sensor that acquires a heart rate signal corresponding to the heart rate of a vehicle occupant, a body movement sensor that acquires a body movement signal corresponding to the body movement of the occupant, a vehicle information acquisition unit that acquires vehicle information including information related to acceleration and deceleration of the vehicle, a first identification unit that identifies a body movement time period during which the body movement of the occupant is greater than a predetermined reference movement amount based on the body movement signal, a second identification unit that identifies an acceleration / deceleration time period during which the vehicle is accelerating at an acceleration greater than a predetermined reference acceleration or decelerating at a deceleration greater than a predetermined reference deceleration based on the vehicle information, and a calculation unit that calculates the heart rate interval of the occupant based on the heart rate signal acquired during a steady time period that does not include the body movement time period or the acceleration / deceleration time period.

[0007] According to the above configuration, the influence of the occupant's intentional body movements and body movements due to acceleration and deceleration of the vehicle is suppressed, and the occupant's heartbeat interval can be calculated with high accuracy.

[0008] In addition, multiple heart rate sensors may be arranged on the backrest of the seat in which the occupant sits, and the calculation unit may calculate the heart rate interval based on the heart rate signal among the multiple heart rate signals acquired by the multiple heart rate sensors that has the smallest difference from a predetermined reference heart rate signal.

[0009] This makes it possible to calculate the heartbeat interval using the heartbeat signal from the heartbeat sensor that is placed at a position among the multiple heartbeat sensors that is most suited to the physique, etc., of the occupant.

[0010] The reference heart rate signal may be a heart rate signal acquired when the occupant's body movement is equal to or less than a reference movement amount and the vehicle is stopped.

[0011] This allows a highly reliable heart rate signal acquired under stable conditions to be set as the reference heart rate signal.

[0012] The body movement sensor may also be disposed in a headrest of the seat and detect the movement of the occupant's head.

[0013] This allows the active body movement of the occupant to be detected efficiently.

[0014] In addition, the biometric information acquisition system may further include a vibration information generating unit that generates vibration information related to vehicle vibrations based on the difference between a heart rate interval calculated based on a heart rate signal acquired during a steady time period and a predetermined reference heart rate interval.

[0015] This makes it possible to obtain not only biometric information based on the occupant's heart rate intervals, but also vibration information related to vehicle vibrations.

[0016] The reference heartbeat interval may be a heartbeat interval calculated based on a heartbeat signal acquired when the body movement of the occupant is equal to or less than a reference movement amount and the vehicle is stopped.

[0017] This allows a highly reliable heartbeat interval calculated under stable conditions to be set as the reference heartbeat interval.

[0018] The biometric information acquisition system may also include a server capable of communicating with the vehicle via a communication network, and the server may include a calculation unit and a transmission unit that transmits information regarding the heart rate interval calculated by the calculation unit to the vehicle.

[0019] This allows the server to execute calculations of heartbeat intervals, which require a relatively high processing load, and reduces the calculation load on the vehicle side.

[0020] In addition, as another embodiment of the present invention, a biometric information acquisition method includes the steps of: acquiring a heart rate signal corresponding to the heart rate of a vehicle occupant; acquiring a body movement signal corresponding to the body movement of the occupant; acquiring vehicle information including information regarding acceleration and deceleration of the vehicle; identifying a body movement time period during which the body movement of the occupant is greater than a predetermined reference movement amount based on the body movement signal; identifying an acceleration / deceleration time period during which the vehicle is accelerating at an acceleration greater than a predetermined reference acceleration or decelerating at a deceleration greater than a predetermined reference deceleration based on the vehicle information; and calculating the heart rate interval of the occupant based on the heart rate signal acquired during a steady time period not including the body movement time period and the acceleration / deceleration time period.

[0021] In addition, a program as another embodiment of the present invention causes a computer to perform the following processes: acquiring a heart rate signal corresponding to the heart rate of a vehicle occupant; acquiring a body movement signal corresponding to the body movement of the occupant; acquiring vehicle information including information regarding acceleration and deceleration of the vehicle; identifying a body movement time period during which the body movement of the occupant is greater than a predetermined reference movement amount based on the body movement signal; identifying an acceleration / deceleration time period during which the vehicle is accelerating at an acceleration greater than a predetermined reference acceleration or decelerating at a deceleration greater than a predetermined reference deceleration based on the vehicle information; and calculating the occupant's heart rate interval based on the heart rate signal acquired during a steady time period that does not include the body movement time period or the acceleration / deceleration time period. [Brief description of the drawings]

[0022] [Figure 1] FIG. 1 is a diagram illustrating an example of a configuration of a vehicle according to an embodiment. [Diagram 2] FIG. 2 is a block diagram illustrating an example of a hardware configuration of the biological information acquiring system according to the embodiment. [Diagram 3] FIG. 3 is a block diagram illustrating an example of a functional configuration of the biological information acquiring system according to the embodiment. [Figure 4] FIG. 4 is a flowchart illustrating an example of processing in the biological information acquiring system according to the embodiment. [Diagram 5] FIG. 5 is a diagram showing an example of changes over time in the degree of coincidence between the heartbeat signals of the heartbeat sensors and the reference heartbeat signal according to the first modified example. [Figure 6] FIG. 6 is a diagram illustrating an example of the configuration of a biological information acquiring system according to the second modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Exemplary embodiments of the present invention are disclosed below. The configurations of the embodiments described below, and the actions, results, and effects brought about by the configurations are merely examples. The present invention can be realized with configurations other than those disclosed in the following embodiments, and it is possible to obtain at least one of various effects and derivative effects based on the basic configuration.

[0024] FIG. 1 is a diagram showing an example of the configuration of a vehicle 1 according to an embodiment. The vehicle 1 is an example of a moving body in which a biometric information acquisition system is mounted. The biometric information acquisition system according to this embodiment acquires biometric information of an occupant 2 seated in a seat 11. Note that, although a driver's seat is illustrated as an example in FIG. 1, the seat targeted by the biometric information acquisition system is not limited to the driver's seat, and may be a passenger seat, a rear seat, or another seat.

[0025] The vehicle 1 according to this embodiment includes a heart rate sensor 21 and a body movement sensor 22.

[0026] The heartbeat sensor 21 is disposed inside the backrest 12 of the seat 11 and acquires a heartbeat signal corresponding to the heartbeat of the occupant 2. The heartbeat sensor 21 may be, for example, a Doppler sensor. The heartbeat sensor 21 according to this embodiment transmits radio waves (transmission waves) from inside the backrest 12 toward the back (near the heart) of the occupant 2 and receives a reflected wave of the transmission wave reflected by the occupant 2. The heartbeat sensor 21 acquires a heartbeat signal corresponding to the heartbeat (pulsation) of the occupant 2 based on, for example, a frequency difference between the transmission wave and the reception wave. In this embodiment, three heartbeat sensors 21 are provided, and each heartbeat sensor 21 is capable of acquiring a heartbeat signal. Note that the configuration of the heartbeat sensor 21 is not limited to the above, and any configuration may be used as long as it is capable of acquiring a heartbeat signal while ensuring the safety of the occupant 2, and there are no restrictions on the number, type, arrangement, etc. of sensors.

[0027] The body motion sensor 22 is disposed inside the headrest 13 of the seat 11, and acquires a body motion signal corresponding to the body motion of the occupant 2. The body motion sensor 22 may be, for example, a Doppler sensor, a Frequency Modulated Continuous Wave (FMCW) sensor, or the like. The body motion here refers to a motion other than the pulse of the occupant 2, and may be, for example, a motion based on the vibration of the vehicle 1, or a motion based on the will of the occupant 2. The body motion sensor 22 according to this embodiment transmits radio waves (transmission waves) from inside the headrest 13 toward the rear of the head of the occupant 2, and receives a reflected wave of the transmission wave reflected by the occupant 2. The body motion sensor 22 acquires a body motion signal corresponding to the head motion of the occupant 2 based on, for example, the time from when the transmission wave is transmitted until when the reception wave is received (TOF: Time Of Flight), or the like. The configuration of the body motion sensor 22 is not limited to the above, and may be any configuration that can acquire a body motion signal while ensuring the safety of the occupant 2.

[0028] 2 is a block diagram showing an example of a hardware configuration of a biometric information acquisition system 101 according to an embodiment. The biometric information acquisition system 101 according to the present embodiment is a system for acquiring biometric information related to the heartbeat of an occupant 2 of a vehicle 1, and includes a heartbeat sensor 21, a body movement sensor 22, and a processor 23.

[0029] The processor 23 is an information processing device (computer) that performs various arithmetic processing according to a program, and includes, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), an SSD (Solid State Drive), and an I / F (Interface). The processor 23 expands a program stored in the ROM or SSD into the RAM and executes processing for acquiring biological information. The processor 23 transmits and receives various information to and from other devices via the I / F. The processor 23 according to this embodiment executes various processing for acquiring (generating) biological information of the occupant 2 based on a heartbeat signal from the heartbeat sensor 21, a body movement signal from the body movement sensor 22, vehicle information from the vehicle control system 102, and the like. The biological information acquired by the processor 23 is output to the vehicle control system 102.

[0030] The vehicle control system 102 is a system that performs various processes for controlling the vehicle 1. The vehicle control system 102 is configured by connecting, for example, a drive mechanism (engine, motor, transmission, etc.), a braking mechanism, a steering mechanism, a user I / F, an ECU (Electronic Control Unit), etc. using a CAN (Controller Area Network). The ECU of the vehicle control system 102 generates vehicle information based on the operating states of the drive mechanism, the braking mechanism, the steering mechanism, etc., and outputs the vehicle information to the biometric information acquisition system 101. The vehicle information includes information on acceleration and deceleration of the vehicle 1, etc. The ECU of the vehicle control system 102 also executes a predetermined control based on the biometric information, driving support information, etc. acquired from the biometric information acquisition system 101. The ECU controls, for example, the drive mechanism, the braking mechanism, the steering mechanism, the user I / F, etc. so that a danger avoidance action is realized based on the biometric information, the driving support information, etc. The danger avoidance action can be, for example, a safe stop of the vehicle 1, a warning to the occupant 2, navigation to a medical institution, etc.

[0031] Fig. 3 is a block diagram showing an example of a functional configuration of a biometric information acquisition system 101 according to an embodiment. The biometric information acquisition system 101 includes a body movement time period identification unit 111 (first identification unit), a vehicle information acquisition unit 112, an acceleration / deceleration time period identification unit 113 (second identification unit), a calculation unit 114, a vibration information generation unit 115, and an output unit 116. These functional components 111 to 116 are configured by cooperation between hardware and software (a program that controls a CPU) as shown in Fig. 2, for example. The functional components 111 to 116 may also be configured by using integrated circuits such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array) having specific functions.

[0032] The body movement time period identifying unit 111 identifies a body movement time period during which the body movement of the occupant 2 is greater than a predetermined reference movement amount, based on the body movement signal acquired by the body movement sensor 22. The reference movement amount may be, for example, the movement amount of the head of the occupant 2.

[0033] The vehicle information acquisition unit 112 acquires vehicle information including information related to the acceleration and deceleration of the vehicle 1 .

[0034] The acceleration / deceleration time period specification unit 113 specifies an acceleration / deceleration time period during which the vehicle 1 is accelerating at an acceleration rate greater than a predetermined reference acceleration or decelerating at a deceleration rate greater than a predetermined reference deceleration, based on the vehicle information. The acceleration / deceleration time period specification unit 113 may also specify a stop time period during which the vehicle 1 is stopped, based on the vehicle information.

[0035] The calculation unit 114 calculates the heartbeat interval (heartbeats per predetermined time) of the occupant 2 based on the heartbeat signal acquired by the heartbeat sensor 21, and generates heartbeat information (an example of biological information) including the heartbeat interval. The calculation unit 114 according to this embodiment calculates the heartbeat interval based on the heartbeat signal acquired during a steady time period that does not include a body movement time period and an acceleration / deceleration time period. The calculation unit 114 may also calculate the heartbeat interval based on a heartbeat signal that has the smallest difference from a predetermined reference heartbeat signal among the multiple (three in this embodiment) heartbeat sensors 21. The reference heartbeat signal is set in advance as an appropriate heartbeat signal, and may be, for example, a heartbeat signal acquired when the body movement of the occupant 2 is equal to or less than the reference movement amount and the vehicle 1 is stopped (a stopping time period). This makes it possible to calculate the heartbeat interval using the heartbeat signal of the heartbeat sensor 21 arranged at a position that is suited to the physique of the occupant 2.

[0036] The vibration information generating unit 115 generates vibration information related to the vibration of the vehicle 1 based on the difference between the heartbeat interval calculated by the calculation unit 114 (the heartbeat interval calculated based on the heartbeat signal acquired during the steady time period) and a predetermined reference heartbeat interval. The reference heartbeat interval is preset as an appropriate heartbeat interval, and may be, for example, a heartbeat interval calculated based on a heartbeat signal acquired when the body movement of the occupant 2 is equal to or less than the reference movement amount and the vehicle 1 is stopped (stopping time period). As described above, the heartbeat interval calculated by the calculation unit 114 is based on the heartbeat signal acquired during the steady time period, and therefore the influence of the body movement based on the intention of the occupant 2 and the acceleration / deceleration of the vehicle 1 is sufficiently suppressed. However, when the vibration of the vehicle 1 is large, the accuracy of the heartbeat interval may decrease. When the heartbeat interval calculated by the calculation unit 114 is significantly different from the reference heartbeat interval, it can be inferred that a large vibration is occurring in the vehicle 1. That is, it can be estimated that the greater the difference between the heartbeat interval calculated by the calculation unit 114 and the reference heartbeat interval, the greater the vibration of the vehicle 1. The vibration information is information indicating the magnitude of the vibration of the vehicle 1 estimated in this manner, and can be used, for example, as a part of driving support information.

[0037] The output unit 116 outputs the heart rate information generated by the calculation unit 114 and the vibration information generated by the vibration information generation unit 115 to the vehicle control system 102 or the like.

[0038] 4 is a flowchart showing an example of processing in the biometric information acquisition system 101 according to the embodiment. When acquisition of biometric information of the occupant 2 is started, the body movement time period identification unit 111 identifies a body movement time period based on a body movement signal acquired by the body movement sensor 22 (S101), and the acceleration / deceleration time period identification unit 113 identifies an acceleration / deceleration time period based on vehicle information acquired by the vehicle information acquisition unit 112 (S102).

[0039] The calculation unit 114 identifies a steady time period that does not include a body movement time period and an acceleration / deceleration time period (S103), and calculates a heartbeat interval based on a heartbeat signal acquired by the heartbeat sensor 21 during the steady time period (S104). At this time, the calculation unit 114 may select a heartbeat signal that is closest to a reference heartbeat signal from the multiple heartbeat signals acquired by the multiple heartbeat sensors 21 during the steady time period, and calculate the heartbeat interval based on the selected heartbeat signal.

[0040] Thereafter, the calculation unit 114 judges whether or not the difference between the calculated heartbeat interval and the reference heartbeat interval is equal to or less than a threshold value (S105). If the difference between the heartbeat interval and the reference heartbeat interval is equal to or less than the threshold value (S105: Yes), the heartbeat interval can be determined to be an appropriate value, so the calculation unit 114 generates heartbeat information including the heartbeat interval, and the output unit 116 outputs the heartbeat information to the vehicle control system 102, etc. (S106). On the other hand, if the difference between the heartbeat interval and the reference heartbeat interval is not equal to or less than the threshold value (S105: No), the vibration information generation unit 115 generates vibration information related to the vibration of the vehicle 1 based on the difference between the heartbeat interval and the reference heartbeat interval, and the output unit 116 outputs the vibration information to the vehicle control system 102, etc. (S107).

[0041] According to the above embodiment, it is possible to suppress the influence of the occupant 2's intentional body movement and body movement due to acceleration / deceleration of the vehicle 1, and to calculate the heartbeat interval of the occupant 2 with high accuracy. In addition, it is possible to generate vibration information related to the vibration of the vehicle 1 and use it for controlling the vehicle 1, etc.

[0042] The program for realizing the above-mentioned functions may be provided by being recorded in a computer-readable recording medium such as a CD-ROM, a flexible disk (FD), a CD-R, or a digital versatile disk (DVD) in a format that can be installed or executed by the processor 23. The program may also be configured to be provided by being stored on a computer connected to a network such as the Internet and downloaded via the network. The program may also be configured to be provided or distributed via a network such as the Internet.

[0043] In the above embodiment, the steady time period is determined by taking into consideration the presence or absence of acceleration / deceleration of the vehicle 1. However, the steady time period may be determined by taking into consideration the presence or absence of steering in addition to acceleration / deceleration.

[0044] Modifications of the embodiment will be described below.

[0045] 5 is a diagram showing an example of a change over time in the degree of coincidence between the heartbeat signal of each heartbeat sensor 21 and the reference heartbeat signal according to the first modified example. In this example, 18 heartbeat sensors 21 are arranged so as to cover a wide area of ​​the back of the occupant 2.

[0046] 5, the degree of match between the heartbeat signal detected by each heartbeat sensor 21 and the reference heartbeat signal is indicated by the density (shade) of the dots, with a higher dot density indicating a higher degree of match (smaller difference). Based on the change over time in the distribution of such match, it is possible to estimate the vibration characteristics of the vehicle 1 (for example, lateral oscillation, vertical oscillation, the magnitude of oscillation, etc.), and it is possible to generate vibration information including such characteristics.

[0047] 6 is a diagram showing an example of the configuration of a biometric information acquisition system 101 according to the second modified example. In this example, a part of the process for generating heart rate information is executed by a server 201 located outside the vehicle 1.

[0048] The server 201 is an information processing device capable of communicating with the vehicle 1 via a communication network, and is configured using a technology such as cloud computing. The server 201 preferably includes at least the calculation unit 114 and a transmission unit that transmits information relating to the heartbeat interval (heartbeat information, driving support information, etc.) calculated by the calculation unit 114 to the vehicle 1. With this configuration, it is possible to cause the server 201 to execute calculations of the heartbeat interval, which have a relatively high processing load, thereby reducing the calculation load on the vehicle 1 side.

[0049] Although the embodiment of the present invention has been described above, the above embodiment is presented as an example and is not intended to limit the scope of the invention. This new embodiment can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0050] 1...vehicle, 2...occupant, 11...seat, 12...backrest, 13...headrest, 21...heart rate sensor, 22...body movement sensor, 23...processor, 101...biometric information acquisition system, 102...vehicle control system, 111...body movement time period identification unit (first identification unit), 112...vehicle information acquisition unit, 113...acceleration / deceleration time period identification unit (second identification unit), 114...computation unit, 115...vibration information generation unit, 116...output unit, 201...server

Claims

1. a heart rate sensor for acquiring a heart rate signal corresponding to a heart rate of an occupant of the vehicle; a body movement sensor for acquiring a body movement signal corresponding to a body movement of the occupant; a vehicle information acquisition unit that acquires vehicle information including information regarding acceleration / deceleration of the vehicle; a first identification unit that identifies a time period during which the body movement of the occupant is greater than a predetermined reference movement amount based on the body movement signal; a second identification unit that identifies, based on the vehicle information, an acceleration / deceleration time period in which the vehicle is accelerating at an acceleration rate greater than a predetermined reference acceleration or in which the vehicle is decelerating at a deceleration rate greater than a predetermined reference deceleration; a calculation unit that calculates a heartbeat interval of the occupant based on the heartbeat signal acquired during a steady time period that does not include the body movement time period and the acceleration / deceleration time period; Equipped with A plurality of the heart rate sensors are disposed on a backrest of a seat in which the passenger sits, The calculation unit calculates the heartbeat interval based on a heartbeat signal that has a smallest difference from a predetermined reference heartbeat signal among a plurality of heartbeat signals acquired by the plurality of heartbeat sensors. Biometric information acquisition system.

2. a heart rate sensor for acquiring a heart rate signal corresponding to a heart rate of an occupant of the vehicle; a body movement sensor for acquiring a body movement signal corresponding to a body movement of the occupant; a vehicle information acquisition unit that acquires vehicle information including information regarding acceleration / deceleration of the vehicle; a first identification unit that identifies a time period during which the body movement of the occupant is greater than a predetermined reference movement amount based on the body movement signal; a second identification unit that identifies, based on the vehicle information, an acceleration / deceleration time period in which the vehicle is accelerating at an acceleration rate greater than a predetermined reference acceleration or in which the vehicle is decelerating at a deceleration rate greater than a predetermined reference deceleration; a calculation unit that calculates a heartbeat interval of the occupant based on the heartbeat signal acquired during a steady time period that does not include the body movement time period and the acceleration / deceleration time period; a vibration information generating unit that generates vibration information related to vibration of the vehicle based on a difference between the heartbeat interval calculated based on the heartbeat signal acquired during the steady-state time period and a predetermined reference heartbeat interval; A biometric information acquisition system comprising:

3. A plurality of the heart rate sensors are disposed on a backrest of a seat in which the passenger sits, The calculation unit calculates the heartbeat interval based on a heartbeat signal that has a smallest difference from a predetermined reference heartbeat signal among a plurality of heartbeat signals acquired by the plurality of heartbeat sensors. The biometric information acquisition system according to claim 2 .

4. the reference heart rate signal is the heart rate signal acquired when the body movement of the occupant is equal to or less than the reference movement amount and the vehicle is stopped. The biological information acquisition system according to claim 1 .

5. The body movement sensor is disposed in a headrest of the seat and detects the movement of the head of the occupant.

5. The biological information acquisition system according to claim 1, 3 or 4.

6. the reference heartbeat interval is the heartbeat interval calculated based on the heartbeat signal acquired when the body movement of the occupant is equal to or less than the reference movement amount and the vehicle is stopped. The biological information acquisition system according to claim 2 or 3.

7. a server capable of communicating with the vehicle via a communication network; The server includes the calculation unit and a transmission unit that transmits information about the heartbeat interval calculated by the calculation unit to the vehicle. The biological information acquisition system according to any one of claims 1 to 6.

8. acquiring a heart rate signal corresponding to a heart rate of an occupant of the vehicle by a heart rate sensor; acquiring a body movement signal corresponding to a body movement of the occupant; acquiring vehicle information including information regarding acceleration / deceleration of the vehicle; identifying a time period during which the occupant's body movement is greater than a predetermined reference movement amount based on the body movement signal; identifying an acceleration / deceleration time period during which the vehicle is accelerating at an acceleration rate greater than a predetermined reference acceleration or during which the vehicle is decelerating at a deceleration rate greater than a predetermined reference deceleration based on the vehicle information; calculating a heartbeat interval of the occupant based on the heartbeat signal acquired during a steady time period that does not include the body movement time period and the acceleration / deceleration time period; Including, A plurality of the heart rate sensors are disposed on a backrest of a seat in which the passenger sits, the calculating step calculates the heartbeat interval based on a heartbeat signal that has a smallest difference from a predetermined reference heartbeat signal among a plurality of heartbeat signals acquired by a plurality of the heartbeat sensors; Method of acquiring biometric information.

9. obtaining a heart rate signal corresponding to a heart rate of an occupant of the vehicle; acquiring a body movement signal corresponding to a body movement of the occupant; acquiring vehicle information including information regarding acceleration / deceleration of the vehicle; identifying a time period during which the occupant's body movement is greater than a predetermined reference movement amount based on the body movement signal; identifying an acceleration / deceleration time period during which the vehicle is accelerating at an acceleration rate greater than a predetermined reference acceleration or during which the vehicle is decelerating at a deceleration rate greater than a predetermined reference deceleration based on the vehicle information; calculating a heartbeat interval of the occupant based on the heartbeat signal acquired during a steady time period that does not include the body movement time period and the acceleration / deceleration time period; generating vibration information related to vibration of the vehicle based on a difference between the heartbeat interval calculated based on the heartbeat signal acquired during the steady-state time period and a predetermined reference heartbeat interval; A method for acquiring biometric information comprising:

10. On the computer, acquiring a heartbeat signal corresponding to a heartbeat of a vehicle occupant by a heartbeat sensor; acquiring a body movement signal corresponding to the body movement of the occupant; acquiring vehicle information including information regarding acceleration / deceleration of the vehicle; A process of identifying a time period during which the body movement of the occupant is greater than a predetermined reference movement amount based on the body movement signal; A process of identifying an acceleration / deceleration time period during which the vehicle is accelerating at an acceleration rate greater than a predetermined reference acceleration or decelerating at a deceleration rate greater than a predetermined reference deceleration based on the vehicle information; calculating a heartbeat interval of the occupant based on the heartbeat signal acquired during a steady time period not including the body movement time period and the acceleration / deceleration time period; Run the command, A plurality of the heart rate sensors are disposed on a backrest of a seat in which the passenger sits, The process of calculating includes calculating the heartbeat interval based on a heartbeat signal that has a smallest difference from a predetermined reference heartbeat signal among a plurality of heartbeat signals acquired by a plurality of the heartbeat sensors. program.

11. On the computer, obtaining a heart rate signal corresponding to a heart rate of an occupant of the vehicle; acquiring a body movement signal corresponding to the body movement of the occupant; acquiring vehicle information including information regarding acceleration / deceleration of the vehicle; A process of identifying a time period during which the body movement of the occupant is greater than a predetermined reference movement amount based on the body movement signal; A process of identifying an acceleration / deceleration time period during which the vehicle is accelerating at an acceleration rate greater than a predetermined reference acceleration or decelerating at a deceleration rate greater than a predetermined reference deceleration based on the vehicle information; calculating a heartbeat interval of the occupant based on the heartbeat signal acquired during a steady time period not including the body movement time period and the acceleration / deceleration time period; generating vibration information related to vibration of the vehicle based on a difference between the heartbeat interval calculated based on the heartbeat signal acquired during the steady-state time period and a predetermined reference heartbeat interval; A program that executes the following.

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