JP6488751B2 - Crew status acquisition device - Google Patents

Description

  The present invention relates to an occupant state acquisition device that acquires biological information of an occupant with a biological sensor provided on a vehicle seat.

  In recent years, in order to evaluate and manage the health of occupants in a vehicle, it has been studied to install a biometric sensor for acquiring biometric information on the vehicle. This biometric information becomes an index of the occupant's health condition, is transmitted to an in-vehicle control device or a medical institution outside the vehicle, and is used for objective determination of the occupant's health condition. Use of such biological information is considered to be useful for emergency response when a passenger is in poor physical condition.

  As the above-described biological sensor, one that is provided in a non-contact manner with respect to an occupant and irradiates a microwave toward the vicinity of the chest of the occupant is known (for example, Patent Documents 1 and 2). In other words, biological information related to the occupant's heartbeat and respiration is acquired based on the microwave irradiated toward the occupant and the reflected or transmitted wave. Such a biosensor is set so as to irradiate a predetermined region on a seat on which a passenger is seated with electromagnetic waves. This predetermined area corresponds to the detection range of the biosensor.

JP 2013-153783 A Japanese Patent No. 5454593

  However, when the vehicle rolls over, the occupant may be displaced with respect to the seat. Therefore, there is a possibility that the occupant may move out of the detection range of the biological sensor, and the accuracy of the biological information acquired by the biological sensor may be reduced.

  The present case has been devised in view of the above-described problems, and provides an occupant state acquisition device capable of improving information acquisition accuracy with a biometric sensor when a vehicle rolls over. One of the purposes. Note that the present invention is not limited to this purpose, and is a function and effect derived from each configuration shown in “Mode for Carrying Out the Invention” to be described later. It can be positioned as a purpose.

(1) passenger state obtaining apparatus disclosed herein is fixed in the seat which is installed in a vehicle, a rail lateral direction Ru extending, slidably disposed in the horizontal direction along the rail, the A biosensor for acquiring biometric information of the occupant by irradiating a detection wave toward the occupant seated on the seat and detecting the reflected wave, a lock device for restraining the sliding of the biosensor, and a roll of the vehicle And a control device that releases the restraint by the lock device when an over is detected.

  (2) It is preferable that the locking device restrains sliding of the biosensor in the left-right direction. In this case, it is preferable that the control device releases the right or left restraint by the lock device according to a roll angle when the vehicle is stationary.

(3) Moreover, it is preferable that the said locking device restrains the sliding of the said biosensor in several positions. In this case, it is preferable that the control device controls the position of restraint by the lock device according to a roll angle when the vehicle is stationary.
(4) Moreover, it is preferable that the rail has an end wall portion that stands on an end portion in the extending direction and stops sliding of the biosensor.

  According to the disclosed occupant state acquisition device, the biosensor is slidably installed with respect to the rail fixed inside the seat, and the sliding is restrained by the lock device. Further, the restraint by the locking device is released when the vehicle rollover is detected. Therefore, when a rollover occurs in the vehicle, even if the occupant is displaced relative to the seat by a force (for example, gravity) applied to the vehicle, the biosensor can be displaced on the rail in the same manner as the occupant. Therefore, when the vehicle rolls over, the biometric sensor can be arranged close to the occupant, and the accuracy of the occupant's biometric information acquired by the biometric sensor can be improved.

1 is a schematic configuration diagram of a vehicle on which an occupant state acquisition device according to an embodiment is mounted. FIG. 2 is a longitudinal sectional view of the seat in a standard state of the vehicle of FIG. It is a longitudinal cross-sectional view (BB sectional view taken on the line of FIG. 2) of the main part of the sheet of FIG. It is a block diagram which shows the function of the control apparatus mounted in the vehicle of FIG. FIG. 3 is a diagram corresponding to FIG. 2 when the vehicle of FIG. 1 rolls over, in which (a) illustrates a case where the vehicle right-side is turned down and (b) rolls over to a posture where the vehicle left-side is down. The case where it did is illustrated. It is a flowchart which illustrates the control procedure of the passenger | crew state acquisition apparatus of FIG.

An occupant state acquisition device as an embodiment will be described with reference to the drawings. Note that the embodiment described below is merely an example, and there is no intention to exclude various modifications and technical applications that are not explicitly described in the following embodiment.
In the following description, the traveling direction of the vehicle on which the occupant state acquisition device is mounted is defined as the front, and the left and right of the vehicle are determined based on the front. A direction perpendicular to both the front-rear direction and the left-right direction is referred to as a vehicle up-down direction. The upper and lower sides of the vehicle are determined based on the standard posture of the vehicle (the posture in which the vehicle can travel). Further, the direction of gravity is simply referred to as “downward” with respect to the vehicle vertical direction, and the opposite is simply referred to as “upward”.

[1. Constitution]
[1-1. Device configuration]
The occupant state acquisition device according to the present embodiment is mounted on the vehicle 1 shown in FIG. The vehicle 1 is a right-hand drive vehicle having a seat 4 that is used as a driver's seat on the front right side in a vehicle interior. The occupant state acquisition device according to the present embodiment is provided for an occupant (that is, a driver) 5 seated on the seat 4 of the vehicle 1.

  The occupant state acquisition device includes an occupant rescue ECU 50 (control device) that evaluates and manages the health state of the occupant 5 and performs control to rescue the occupant 5 as necessary. The occupant rescue ECU 50 is an electronic control unit (Electric Control Unit) provided at an arbitrary position of the vehicle 1, and is configured as an LSI device or an embedded electronic device in which a known microprocessor, ROM, RAM, or the like is integrated, 1 is connected to a communication line of an in-vehicle network provided in 1. Specific control contents of the passenger rescue ECU 50 will be described later.

The vehicle 1 is equipped with acceleration sensors 3a and 3b and an angular velocity sensor 2. The acceleration sensors 3a and 3b and the angular velocity sensor 2 are all connected to the occupant rescue ECU 50 and transmit detected information to the occupant rescue ECU 50.
Hereinafter, the configuration of the vehicle 1 will be described assuming that the vehicle 1 is in the standard posture. That is, the vertical direction here corresponds to the vertical direction of the vehicle.

  The acceleration sensors 3a and 3b are for detecting the acceleration of the vehicle 1. The vehicle 1 of the present embodiment is equipped with two types of acceleration sensors: an acceleration sensor 3a that detects the longitudinal acceleration of the vehicle 1 and an acceleration sensor 3b that detects the lateral acceleration (lateral acceleration) of the vehicle 1. Has been. For example, one acceleration sensor 3a is installed at a substantially central portion in the left-right direction of the front portion of the vehicle 1. Moreover, the acceleration sensor 3b is arrange | positioned one each in the lower part of the left and right center pillar of the vehicle 10, for example.

  The angular velocity sensor 2 detects a roll angular velocity (roll rate, change amount of roll angle per unit time) around an axis extending in the front-rear direction of the vehicle 1. The angular velocity sensor 2 detects, for example, the roll angular velocity when the vehicle 1 rotates clockwise as viewed from the rear of the vehicle 1 as a positive value, and the roll angular velocity when the vehicle 1 rotates counterclockwise is negative. Detect as value. A so-called gyro sensor can be applied to the angular velocity sensor 2.

  The seat 4 is for an occupant 5 who gets on the vehicle 1 to sit in the passenger compartment. The seat 4 includes a seat back 4a that forms a backrest portion and a seat cushion 4b that forms a seat portion. The seat back 4a and the seat cushion 4b are made of a material having appropriate flexibility and resilience. As shown in FIG. 2, the seat 4 includes a seat pan 4c, a pair of seat frames 4d, and a pair of seat rails 4e as skeleton members. 2 is a cross-sectional view taken along the line AA in FIG. 1. Here, hatching of the seat cushion 4b is omitted, and a waist portion of the occupant 5 seated on the seat 4 is indicated by a two-dot chain line. The center O in the left-right direction is indicated by a one-dot chain line.

  The seat pan 4c is a planar member that supports the seat cushion 4b, and is provided below or inside the seat cushion 4b. The seat pan 4c of the present embodiment has a shape that is bent so that both left and right sides of a portion extending in a substantially horizontal plane are inclined upward toward the outside of the seat 4, and is formed in a symmetrical shape.

  The seat frame 4d is a member that supports the left and right sides of the seat pan 4c. The seat frame 4d of the present embodiment is formed in an angle shape in which a flange extends from the lower end of a vertical surface extending in the front-rear direction toward the inner side of the seat 4. The seat frame 4d has its upper end fixed to the left and right ends of the seat pan 4c, and its lower end supported by the seat rail 4e.

The seat rail 4e is a rail that supports the seat frame 4d so as to be slidable in the front-rear direction with respect to the vehicle body. The seat rail 4e is provided in parallel to each other below the seat frames 4d and fixed to the floor panel. The seat rail 4e is provided with a mechanism for locking the sliding position of the seat frame 4d in the front-rear direction.
The above-described seat pan 4c, seat frame 4d, and seat rail 4e are all formed by, for example, pressing a sheet metal. Further, the seat pan 4c and the seat frame 4d are coupled via a bracket or directly coupled by welding.

  The occupant state acquisition device according to this embodiment includes a rail 20 that is a guide member fixed inside the seat 4, a biosensor 30 that is slidably installed with respect to the rail 20, and sliding of the biosensor 30. And locking devices 40R and 40L for restraining. In this embodiment, the rail 20 is extended in the left-right direction, and the biosensor 30 is provided so as to slide on the rail 20 in the left-right direction. The locking devices 40R and 40L are disposed on the left and right sides of the biological sensor 30, and come into contact with the biological sensor 30, respectively. Hereinafter, when the left and right locking devices 40R and 40L are not distinguished from each other, they are also collectively referred to as the locking device 40.

  The rail 20 defines a sliding path of the biosensor 30. As shown in FIGS. 2 and 3, the rail 20 according to the present embodiment includes a pair of wall-shaped main body portions 21 extending in the left-right direction, and an upper wall formed along the upper end side of each main body portion 21. Part 22 and end wall parts 23 formed at the left and right ends of main body part 21. The main body 21 is a part that regulates the movement of the biosensor 30 in the front-rear direction, and is disposed so as to face each other with the biosensor 30 interposed therebetween, and the lower end side thereof is parallel to the seating surface of the seat cushion 4 b of the seat 4. It fixes to the upper surface of the site | part extended in the substantially horizontal surface shape of the sheet pan 4c. Further, the upper wall part 22 is a part that regulates the upward movement of the biosensor 30 and projects from the main body parts 21 toward each other. The space between the upper wall portions 22 may be opened or closed. The end wall portion 23 is a portion that restricts movement of the biosensor 30 to the outside in the left-right direction with respect to the main body portion 21, and is erected in the front-rear direction so as to connect the pair of main body portions 21.

  The biological sensor 30 irradiates a predetermined range (see broken lines shown in FIGS. 2 and 5) toward the occupant 5 seated on the seat 4 with a detection wave such as an electromagnetic wave or a sound wave, and detects the reflected wave to detect the occupant 5. The biometric information is acquired. The biological information is information serving as an index of the health condition of the occupant 5, for example, information such as the heart rate and respiratory rate of the occupant 5. The biometric sensor 30 transmits the acquired biometric information of the occupant 5 to the occupant rescue ECU 50.

  As shown in FIG. 2, the biological sensor 30 of the present embodiment is installed on the center O in the left-right direction on the upper surface of the seat pan 4 c in the longitudinal section of the seat pan 4 c, and above the occupant 5 waist. It sets so that a detection wave may be irradiated toward. Hereinafter, the position of the biosensor 30 in the standard posture vehicle 1 (the position of the biosensor 30 shown in FIG. 2) is referred to as a standard position. That is, the biometric sensor 30 of the present embodiment is set such that the standard position is set on the center O in the left-right direction of the seat 4 and slides on the rail 20 from the standard position along the rail 20 leftward or rightward. Is provided.

  The locking device 40 restrains the biosensor 30 at the standard position when the vehicle 1 is normal (when the vehicle 1 does not roll over (rotation around the axis in the front-rear direction, rollover)). On the other hand, the locking device 40 is controlled to release the restraint when the vehicle 1 rolls over. The left and right locking devices 40R and 40L are formed to be equal to each other. That is, the right side locking device 40R includes a stopper 41R, a wire 42R, and a winder 43R, and the left side locking device 40L includes a stopper 41L, a wire 42L, and a winder 43L as elements corresponding thereto. Hereinafter, when corresponding left and right elements are not distinguished from each other, they are collectively referred to as a stopper 41, a wire 42, and a winder 43, respectively.

  The stopper 41 prohibits the movement of the biosensor 30 in the left-right direction by coming into contact with the biosensor 30 and is disposed in the sliding path of the biosensor 30 defined by the rail 20. The stopper 41 of the present embodiment is provided in a state in which the stopper 41 is in contact with the biosensor 30 in the vehicle 1 in the standard posture, and the position thereof is temporarily fixed by being fitted into the hole 4f formed in the seat pan 4c. The

  The position of the stopper 41 may be temporarily fixed by a configuration other than the hole 4f described above. For example, a device for temporarily fixing the position of the stopper 41 may be provided instead of the hole 4f described above, and the position of the stopper 41 may be temporarily fixed by this device. Alternatively, the position of the stopper 41 is fixed by forming a rough surface on the surface of the stopper 41 so that the stopper 41 is less slippery than the biosensor 30 on the seat pan 4c. May be. Moreover, the stopper 41 should just be what can stop the sliding of the biosensor 30, and the specific shape and material are not specifically limited. For example, the stopper 41 may be formed in a columnar shape or a prismatic shape. The stopper 41 may be formed of a material (for example, rubber) having appropriate elasticity so that the stopper 41 can be easily fitted into the hole 4f of the seat pan 4c.

  The wire 42 and the winder 43 are for allowing the living body sensor 30 to slide by moving the stopper 41. The wire 42 is formed of a non-extending wire that gives tension to a tensile load, and both ends thereof are coupled to the stopper 41 and the winder 43. The winder 43 is a device for winding the wire 42 and includes, for example, a shaft portion to which one end of the wire 42 is coupled, and a motor that rotates the shaft portion. The winder 43 is fixed at an appropriate position (for example, an arbitrary position on the seat frame 4d) that is not displaced with respect to the standard position. The winder 43 is controlled by the occupant rescue ECU 50 for its operation (for example, the timing for starting the rotation of the motor and the amount of rotation thereof).

[1-2. Control configuration]
A control configuration of the occupant rescue ECU 50 will be described with reference to FIG. Hereinafter, the vertical direction determined by gravity is distinguished from the vertical direction of the vehicle.
The occupant rescue ECU 50 is provided with a rollover judging unit 51, a posture estimating unit 52, a releasing unit 53, and a health managing unit 54. The rollover determination unit 51, the posture estimation unit 52, and the release unit 53 are functional elements for improving the acquisition accuracy of the biological information in the biological sensor 30 by changing the position of the biological sensor 30 according to the position of the occupant 5. is there. The health management unit 54 is a functional element for managing the health state of the occupant 5 based on the biological information acquired by the biological sensor 30.

  The rollover determination unit 51 determines whether or not the vehicle 1 rolls over. The rollover determination unit 51 determines that an impact is applied to the vehicle 1 when the absolute value of the acceleration transmitted from the acceleration sensors 3a and 3b is equal to or greater than a predetermined threshold, and rolls over the vehicle 1 based on the roll angular velocity. The presence or absence of is determined. For example, the rollover determination unit 51 determines that the vehicle 1 rolls clockwise when the roll angular velocity transmitted from the angular velocity sensor 2 is equal to or greater than a predetermined positive threshold, and is equal to or smaller than a predetermined negative threshold. Judged to have rolled over counterclockwise.

  In addition, the determination method by the rollover determination part 51 is not restricted to the above-mentioned thing. For example, the rollover determination unit 51 may determine whether or not the vehicle 1 rolls over based on information detected by the angular velocity sensor 2 regardless of whether or not an impact is applied to the vehicle 1. Further, the rollover determination unit 51 may determine whether or not the vehicle 1 rolls over based on detection information from the left and right acceleration sensors 3b instead of the detection information from the angular velocity sensor 2. Further, the rollover determination unit 51 may determine whether or not the vehicle 1 rolls over using information other than information detected by the acceleration sensors 3a and 3b and the angular velocity sensor 2 (or in combination). The rollover judging unit 51 is based on, for example, an operation signal of the vehicle 1 airbag device or an emergency stop signal output from another electronic control device (for example, engine ECU, motor ECU, vehicle body control ECU, battery ECU, etc.). Thus, whether or not the vehicle 1 rolls over may be determined.

  When the vehicle 1 rolls over, the posture estimation unit 52 responds to a roll angle [roll angle with respect to the standard posture of the vehicle 1 (the roll angle is 0 °, a horizontal posture)] when the vehicle 1 is overturned. Thus, the posture of the vehicle 1 when it is stationary (hereinafter referred to as a stationary posture) is estimated. The posture estimation unit 52 of the present embodiment is configured such that the vehicle 1 is in a stationary posture with the vehicle right side down (for example, the posture shown in FIG. 5A, the posture lying on the right side with respect to the standard posture) and the vehicle left side. (For example, the posture shown in FIG. 5B, the posture lying on the left side with respect to the standard posture) and the posture with the vehicle lower side or the vehicle upper side down (standard by 360 ° rotation shown in FIG. 2) And the same posture as the posture or a posture reversed upside down from the standard posture rotated by 180 °). In addition, the case where the vehicle 1 is in the posture with the vehicle lower side down after the vehicle rolls over is, for example, the case where the vehicle 1 is stationary by rotating once in the roll direction (that is, when the roll angle is 360 °). It is.

  When the rollover judging unit 51 determines that a rollover has occurred in the rollover determining unit 51, for example, the roll angle when the vehicle 1 is stationary is obtained by integrating the roll angular velocity used for this determination with time. And the stationary posture of the vehicle 1 is estimated based on the calculated roll angle. As a specific example, when the calculated roll angle is 90 ° clockwise or 270 ° counterclockwise, the posture estimation unit 52 determines that the vehicle 1 is in a posture with the vehicle right side down. To do.

  In the estimation of the stationary posture by the posture estimation unit 52, it is sufficient to know at least the roll angle when the vehicle 1 is stationary, and information on the roll direction of the vehicle 1 (whether it is clockwise or counterclockwise) is omitted. May be. Further, the roll angle when the vehicle 1 is stationary is not limited to the one calculated by the integration of the roll angular velocity as described above, and may be a value detected by means for detecting the actual roll angle of the vehicle 1, for example. Good.

  The release unit 53 releases the restraint of the biosensor 30 by the lock device 40. The release unit 53 of the present embodiment operates one of the left and right locking devices 40R and 40L on the condition that a rollover has occurred in the vehicle 1.

More specifically, as shown in FIG. 5A, when the posture estimating unit 52 estimates that the vehicle 1 is in a posture with the vehicle right side down, the release unit 53 winds the lock device 40R on the right side. An operation signal is output to the winder 43R, and the winder 43R is operated. In this case, the restriction by the right lock device 40R is released, and the biosensor 30 is allowed to slide in the right direction.
On the other hand, as shown in FIG. 5B, when the posture estimating unit 52 estimates that the vehicle 1 is in the posture with the vehicle left side down, the release unit 53 is connected to the winder 43L of the lock device 40L on the left side. An operation signal is output, and this winder 43L is operated. In this case, the restraint by the lock device 40L on the left side is released, and the living body sensor 30 is allowed to slide in the left direction.

  As described above, when the vehicle 1 rolls over, the release unit 53 is configured so that one of the lock devices 40R, 40R, 40L located on the lower side of the left and right lock devices 40R, 40L according to the stationary posture of the vehicle 1 after the rollover. The 40L winders 43R and 43L are operated. That is, the release unit 53 releases either the left or right constraint by the lock device 40 according to the roll angle when the vehicle 1 is stationary, and allows the living body sensor 30 to slide due to its own weight.

  As shown in FIG. 2, when the posture estimation unit 52 estimates that the vehicle 1 is in a posture in which the vehicle 1 is on the lower side or the upper side of the vehicle, the release unit 53 winds the lock device 40 on either the left or right side. No operation signal is output to the take-up device 43, and neither the right or left wind-up device 43 is operated. In this case, the restraint by the left and right locking devices 40 is maintained, and the sliding of the biosensor 30 in the left-right direction remains restrained.

  The health management unit 54 performs rescue control for rescue of the occupant 5 based on information transmitted from the biological sensor 30. As specific examples of this relief control, the acquired information of the biosensor 30 is transmitted to a medical institution, and the information is provided to medical personnel in real time, the seat back 4a is tilted backward, or the seat belt is bound. The thing to cancel is mentioned. The health management unit 54 of the present embodiment performs the rescue control when the rollover determination unit 51 determines that a rollover has occurred in the vehicle 1 (when a rollover of the vehicle 1 is detected). The health management unit 54 determines not only when the vehicle 1 rolls over, but also when the vehicle 1 is normal, based on the information acquired by the biosensor 30 based on the acquired information of the occupant 5 and when the occupant 5 is in poor health. Implements the rescue control described above.

[2. flowchart]
FIG. 6 is an example of a flowchart for explaining the control contents executed by the occupant rescue ECU 50. This flowchart is implemented when the power supply (for example, an ignition switch or a power switch) of the vehicle 1 is in an on state. It should be noted that at the start of this flowchart, no rollover has occurred in the vehicle 1, and the vehicle 1 is in a standard posture (horizontal posture). That is, the biosensor 30 is in the standard position, and its sliding is restricted by the left and right locking devices 40.

  In step S1, detection information from the angular velocity sensor 2 and the acceleration sensors 3a and 3b is input to the occupant rescue ECU 50. In step S2, the rollover determining unit 51 determines whether or not the vehicle 1 rolls over based on the information input in step S1. If it is determined that the vehicle 1 has rolled over, the process proceeds to step S3. If it is determined that there is no rollover, the process proceeds to step S9.

  In step S3, detection information from the angular velocity sensor 2 and the acceleration sensors 3a and 3b is input to the occupant rescue ECU 50 as in step S1, and in subsequent step S4, it is determined whether or not the vehicle 1 is stationary. This determination can be made by determining that the absolute value of the roll angular velocity or acceleration of the vehicle 1 is less than a predetermined value. If the vehicle 1 is stationary, the process proceeds to step S5. On the other hand, if the vehicle 1 is not stationary, the motion state of the vehicle 1 may change transiently (for example, the vehicle 1 is moving in the roll direction). Then, the acquisition of the roll angular velocity and acceleration information and the determination as to whether or not the vehicle 1 is stationary are repeated until the vehicle 1 stops.

  In step S5, the posture estimation unit 52 determines whether the stationary posture of the vehicle 1 is a posture with the vehicle right side down. If it is determined that the stationary posture of the vehicle 1 is the posture with the right side of the vehicle down, the process proceeds to step S6. If it is determined to be any other posture, the process proceeds to step S7. In step S6, the release unit 53 outputs an operation signal to the winder 43R of the right lock device 40R, and the restriction by the right lock device 40R is released.

  On the other hand, in step S7, the posture estimation unit 52 determines whether or not the stationary posture of the vehicle 1 is a posture with the vehicle left side down. If it is determined that the stationary posture of the vehicle 1 is a posture with the vehicle left side down, the process proceeds to step S8, and if it is determined to be any other posture, the process proceeds to step S9. In step S8, the release unit 53 outputs an operation signal to the winder 43L of the left lock device 40L, and the restriction by the left lock device 40L is released.

  When it is determined in step S7 that the stationary posture of the vehicle 1 is not a posture in which the left side of the vehicle is down, the posture estimation unit 52 is a posture in which the stationary posture of the vehicle 1 is down on the vehicle upper side or the vehicle lower side. It is judged that. In this case, the restraint by either the left or right locking device 40 is maintained.

  In step S9, the biological information acquired by the biological sensor 30 is input, and in the subsequent step S10, the health management unit 54 determines whether or not the occupant 5 is in poor physical condition. If it is determined that the occupant 5 is in poor health, the process proceeds to step S11. If it is determined that the passenger 5 is not in poor health, the flow returns. In step S11, the health management unit 54 performs rescue control, and returns to this flow.

[3. Action]
Next, with reference to FIG.2 and FIG.5, the effect | action of said passenger | crew state acquisition apparatus is demonstrated. Here, it is assumed that the vehicle 1 rolls over.
As shown in FIG. 5A, when the vehicle 1 rolls over and stops in a posture with the vehicle right side down, the occupant 5 is pulled to the right side of the vehicle by gravity and moves on the seat 4 to the right side of the vehicle. To do. In this case, in the occupant state acquisition device, the winder 43R of the right lock device 40R corresponding to the rollover posture is actuated to wind the right wire 42R, and the right stopper 41R is removed from the hole 4f of the seat pan 4c. It moves away and moves to a position away from the biosensor 30. As a result, the biosensor 30 is released from restraint by the right stopper 41R and slides on the rail 20 to the right of the vehicle by its own weight. The biosensor 30 is received by the right end wall portion 23 of the rail 20, and the sliding is stopped. That is, in this case, the occupant 5 and the biological sensor 30 both move to the right of the vehicle due to the gravity acting on the vehicle 1.

  As shown in FIG. 5B, when the vehicle 1 rolls over and stops in a posture with the vehicle left side down, the occupant 5 and the biosensor 30 move in the opposite direction to the above case. That is, in this case, the occupant 5 moves to the left of the vehicle due to gravity and the winder 43L of the lock device 40L on the left side corresponding to the rollover posture is activated, whereby the biosensor 30 moves on the rail 20 on the vehicle. It slides to the left by its own weight. In this case, the occupant 5 and the biosensor 30 both move to the left of the vehicle due to the gravity acting on the vehicle 1.

  Thus, the biosensor 30 slides on the rail 20 by its own weight and is displaced so as to follow the occupant 5 moved by gravity. Therefore, even if the occupant 5 is displaced on the seat 4 according to the stationary posture after the vehicle 1 rolls over, the biosensor 30 is provided in the vicinity of the occupant 5. Thereby, the acquisition accuracy of the biological information in the biological sensor 30 is improved.

  On the other hand, as shown in FIG. 2, when the vehicle 1 rolls over and stops in a posture in which the vehicle lower side or the vehicle upper side is down, the occupant 5 is not pulled in the left-right direction by gravity. The amount of movement in the direction is likely to be very small. In this case, in the occupant state acquisition device, neither the left or right locking device 40 is operated, and the left and right stoppers 41 are both kept in contact with the biosensor 30. As a result, the biosensor 30 remains restrained at the standard position.

  When the vehicle 1 rolls over, the occupant 5 may be temporarily displaced with respect to the seat 4 by centrifugal force even while the vehicle 1 is moving in the roll direction. On the other hand, the biosensor 30 is restrained to the standard position by the lock device 40 until the vehicle 1 is in a stationary posture. That is, the position of the biosensor 30 is restrained by the lock device 40 until the vehicle 1 is stationary and the final position of the occupant 5 is determined.

  The biosensor 30 is not limited to the position where the vehicle 1 is moving in the roll direction, but is also set to the standard position by the lock device 40 when the vehicle 1 is in a normal state or when the vehicle 1 does not roll over. Be bound. In other words, the biosensor 30 is a temporary movement of the occupant 5 (for example, movement due to centrifugal force when the vehicle 1 turns during normal traveling, or movement due to an impact when the vehicle 1 collides without rollover). ) Does not move following the occupant 5 and remains in the standard position.

[4. effect]
(1) The above-described occupant state acquisition device is provided with a rail 20 that is fixed inside the seat 4 and a biosensor 30 that is slidably installed with respect to the rail 20. Therefore, when the occupant 5 seated on the seat 4 is displaced with respect to the seat 4 by a force (for example, gravity) applied to the vehicle 1, the biosensor 30 can be displaced on the rail 20 in the same manner as the occupant 5. . Therefore, the biosensor 30 can be disposed close to the occupant 5, and the accuracy of the biometric information of the occupant 5 acquired by the biosensor 30 can be improved.
Moreover, since said passenger | crew state acquisition apparatus is the simple structure of fixing the rail 20 to the inside of the seat 4 with respect to the seat 4 in which the biosensor 30 is mounted, the existing seat 4 can be utilized. Manufacturing cost can be reduced.

  The occupant state acquisition device is provided with a lock device 40 that restrains the sliding of the biosensor 30 and an occupant rescue ECU 50 that releases the restraint by the lock device 40 when a rollover of the vehicle 1 is detected. Therefore, even if the occupant 5 is displaced with respect to the seat 4 due to the rollover of the vehicle 1, the biosensor 30 can be displaced in accordance with the rollover of the vehicle 1, and the biosensor 30 is disposed close to the occupant 5. Can do.

Further, when the rollover of the vehicle 1 is not detected, since the sliding of the biosensor 30 can be restricted by the lock device 40, the biosensor 30 can be fixed at the standard position. Therefore, when the vehicle 1 is normal, the biosensor 30 can be disposed close to the normal position of the occupant 5.
As described above, according to the occupant state acquisition device described above, by providing the lock device 40, the biosensor 30 is arranged close to the occupant 5 in both cases where the vehicle 1 rolls over and in other cases. It is possible to improve the acquisition accuracy of the biological information in the biological sensor 30.

  (2) In the above occupant state acquisition device, the locking device 40 restrains the biosensor 30 from sliding in the left-right direction. In addition, the occupant rescue ECU 50 releases the right or left restraint by the lock device 40 according to the roll angle when the vehicle 1 is stationary. Therefore, the probability that the biosensor 30 can be moved to either the right or left according to the stationary posture of the vehicle 1 is increased, and the biometric information acquisition accuracy in the biosensor 30 can be improved.

Further, since the restraint by the lock device 40 is released according to the roll angle when the vehicle 1 is stationary, the biosensor 30 can be restrained to the standard position while the vehicle 1 is moving transiently. Therefore, the biosensor 30 can be moved according to the final position of the occupant 5, and the probability that the biosensor 30 is arranged in the vicinity of the occupant 5 can be increased.
In the above occupant state acquisition device, the left and right locking devices 40 can restrain the sliding of the biosensor 30 in the left-right direction. Therefore, for example, the biosensor 30 can be prevented from moving in the left-right direction on the rail 20 during the rollover of the vehicle 1, and the position of the biosensor 30 can be stabilized.

(3) In the above occupant state acquisition device, the end wall portion 23 is erected at the end portion in the extending direction of the rail 20. When the biosensor 30 slides on the rail 20, the end wall portion 23 receives the biosensor 30 and stops the slide. That is, the end wall portion 23 can stop the sliding of the biosensor 30 at the end portion of the rail 20. Therefore, the position of the biosensor 30 in the sliding direction can be optimized, and the biometric information acquisition accuracy in the biosensor 30 can be further improved.
In the occupant state acquisition device, the rail 20 is provided with the upper wall portion 22. Therefore, the displacement of the biosensor 30 in the vehicle upward direction can be suppressed, and the position of the biosensor 30 can be optimized.

[5. Modified example]
Regardless of the embodiment described above, various modifications can be made without departing from the spirit of the invention. Each structure of embodiment mentioned above can be selected as needed, or may be combined suitably.

  In the above-described embodiment, the case where the locking devices 40R and 40L are respectively arranged on the left and right of the biological sensor 30 and restrains the biological sensor 30 at the standard position is exemplified. However, the number and arrangement of the locking devices 40R and 40L can be changed. It is. For example, more locking devices 40 may be arranged side by side on the rail 20, and the sliding of the biosensor 30 may be restricted not only at the standard position but also at other positions by these locking devices 40. In this case, the occupant rescue ECU 50 may control the position where the biosensor 30 is restrained by the lock device 40 according to the roll angle when the vehicle 1 is stationary. Specifically, the lock device 40 may be controlled so that the biosensor 30 slides to a position away from the standard position as the roll angle is closer to a right angle (90 °, 270 °).

  In this way, the sliding amount of the biosensor 30 can be controlled in multiple stages according to the roll angle of the vehicle 1, and the position of the biosensor 30 can be optimized according to the stationary posture of the vehicle 1. . Therefore, the probability that the biological sensor 30 can be disposed near the occupant 5 is increased, and the biological information acquisition accuracy in the biological sensor 30 can be improved with a higher probability.

  Further, the configuration of the locking device 40 can be changed. The lock device 40 may be any device that can restrain at least the sliding of the biosensor 30 and that can be released by the occupant rescue ECU 50. For example, the locking device 40 is attached to the lower surface (the back surface with respect to the upper surface on which the rail 20 is provided) of the portion extending in a substantially horizontal plane of the seat pan 4c, and is a stopper on the sliding path of the biosensor 30 defined by the rail 20 described above. 41 may be protruded or retracted. In this case, the wire 42 and the winder 43 can be omitted.

  Further, the locking device 40 may be disposed only on one of the left and right sides of the biosensor 30 (that is, one of the left and right locking devices 40R and 40L may be omitted). It may be omitted. In this case, the device configuration and the control configuration can be simplified. Even if the locking device 40 is omitted, the biometric sensor 30 is displaced on the rail 20 in the same manner as the occupant 5. Therefore, according to the occupant state acquisition device, the biosensor 30 is displaced as described above. The biometric information acquisition accuracy of the biometric sensor 30 can be improved.

  Moreover, although the case where the locking device 40 is controlled according to the roll angle when the vehicle 1 is stationary has been described in the above-described embodiment, the timing at which the restraint by the locking device 40 is released can be set as appropriate. For example, the restraint by the lock device 40 may be released simultaneously with the ignition of the airbag mounted on the vehicle 1. In this case, since the stop determination of the vehicle 1 (step S3 and step S4 in the flowchart illustrated in FIG. 6) can be omitted, the control configuration can be simplified.

  Moreover, although the case where the vehicle 1 is a right-hand drive vehicle was illustrated in the above-mentioned embodiment, this occupant state acquisition device can be similarly mounted on a left-hand drive vehicle. Further, the occupant state acquisition device is not limited to the driver of the vehicle 1, and may be provided for other occupants who get on the vehicle 1. That is, the occupant state acquisition device may be applied to a seat (seat) other than the seat 4 that is the driver's seat of the vehicle 1.

  Further, in the above-described embodiment, the case where the rail 20 and the biological sensor 30 are provided on the upper surface of the seat pan 4 c is illustrated, but the rail 20 and the biological sensor 30 may be provided at other positions inside the seat 4. Good.

1 Vehicle 4 Seat 5 Crew 20 Rail 23 End Wall 30 Biosensor 40 (40R, 40L) Lock device 50 Crew rescue ECU (control device)

Claims (4)

Is fixed in the seat which is installed in a vehicle, a rail lateral direction Ru extending,
A biological sensor that is slidable in the left-right direction along the rail, irradiates a detection wave toward an occupant seated on the seat, and detects the reflected wave to detect the occupant's biological information;
A locking device for restraining the sliding of the biosensor;
A control device that releases the restraint by the locking device when a rollover of the vehicle is detected;
An occupant state acquisition device comprising: The locking device restrains the sliding of the biological sensor in the left-right direction;
2. The occupant state acquisition device according to claim 1, wherein the control device releases one of right and left restraints by the lock device according to a roll angle when the vehicle is stationary. 3. The locking device restrains sliding of the biosensor at a plurality of positions;
The occupant state acquisition device according to claim 1 or 2, wherein the control device controls a position of restraint by the lock device in accordance with a roll angle when the vehicle is stationary. The occupant state acquisition according to any one of claims 1 to 3, wherein the rail has an end wall portion that is erected at an end portion in the extending direction and stops sliding of the biosensor. apparatus.

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