JP2017140980A - Vehicular warning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular warning device capable of suppressing an increase in the number of components.SOLUTION: A vehicular warning device 10 includes: an electric seat 1 which is displaced and driven on the basis of rotary driving force of a motor M; an on-vehicle camera 13 which monitors a peripheral situation of a vehicle; a camera ECU 14 which performs prescribed processing on image data output from the on-vehicle camera 13; and a vehicle ECU 15 which determines a dangerous state of the vehicle on the basis of an output (recognition information Sd) from the camera ECU 14. The vehicular warning device 10 further includes a control circuit 12 and a drive circuit 11 which vibrate and drive the motor M in a mode without displacement driving of the electric seat 1 on the basis of the determination result in the vehicle ECU 15.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle warning device.

  2. Description of the Related Art Conventionally, there is a vehicular warning device that detects a dangerous situation around a vehicle and informs an occupant of the dangerous situation by driving a vibrating body provided in a vehicle seat based on the detection result. For example, in the technique disclosed in Patent Document 1, when a road lane is monitored by an in-vehicle camera and the vehicle deviates from or may deviate from the lane, the eccentric weight or eccentricity of the motor provided in the vehicle seat Vibration is generated in the vehicle seat by rotating a cam or the like.

Japanese Patent No. 4826441

  By the way, in recent vehicle seat devices, there is one that can perform displacement driving such as forward and backward movement of the seat and tilting of the seat back based on the rotational driving force of the motor. When the above vehicle warning device is applied to such an electric seat, a warning vibrating body (such as a motor) is mounted on the seat in addition to the motor serving as a driving source for displacement driving of the seat. The number of parts increases, and the cost increase due to the addition of a vibrating body becomes a problem.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vehicle warning device that can suppress an increase in the number of parts.

  An alarm device for a vehicle that solves the above problem includes an electric seat that includes a motor and is driven to be displaced based on a rotational driving force of the motor, a danger situation detection unit that detects a danger situation of the vehicle, and the danger situation A vibration control unit that drives the motor to vibrate in a manner that does not involve displacement driving of the electric seat based on the detection result of the detection unit.

  According to this configuration, the motor serving as the drive source for the displacement driving of the electric seat can be caused to function as a vibration source for vibrations for warning of a dangerous situation to the occupant. For this reason, in the vehicle warning device that notifies the occupant of the dangerous situation by vibration of the electric seat, an increase in the number of parts can be suppressed.

  In the above vehicle warning device, the motor is a direct current motor, and the vibration control unit alternately applies a positive voltage and a negative voltage to the motor so that the electric seat is not displaced. The motor is preferably driven to vibrate.

  According to this configuration, based on the detection result of the dangerous situation detection unit, a positive situation and a negative voltage are alternately applied to the direct current motor, so that the danger situation due to the vibration of the direct current motor is not caused without driving the electric seat to be displaced. Can be notified.

  In the vehicle warning device, the vibration control unit preferably drives the motor to vibrate at a frequency corresponding to a resonance frequency of the skeleton of the electric seat, and resonates the skeleton of the electric seat by the vibration of the motor.

  According to this configuration, the skeleton of the electric seat is resonated by the vibration drive of the motor based on the detection result of the danger situation detection unit, so that the danger situation of the vehicle can be more reliably notified to the occupant.

  In the vehicular warning device, the vibration control unit may have a frequency according to a resonance frequency of a first part of the skeleton of the electric seat, or a skeleton of the electric seat, according to a detection result of the dangerous situation detection unit. The motor is preferably driven to vibrate at a frequency corresponding to the resonance frequency of the second part.

  According to this structure, the 1st site | part and 2nd site | part of the frame | skeleton of an electrically-driven sheet | seat can be resonated separately by the vibration of a motor. Thereby, it becomes possible to change the part resonated by the vibration of the motor in the skeleton of the electric seat according to the dangerous situation of the vehicle. For this reason, the variation of the notification of the dangerous situation for the occupant increases, and as a result, it becomes possible to warn the occupant of the dangerous situation more effectively.

  In the vehicular warning device, it is preferable that the vibration control unit changes the magnitude of the vibration drive amplitude of the motor according to the risk level of the dangerous situation based on the detection result of the dangerous situation detection unit.

  According to this configuration, the amplitude of the vibration drive of the motor can be changed according to the dangerous situation of the vehicle. For this reason, the variation of the notification of the dangerous situation for the occupant increases, and as a result, it becomes possible to warn the occupant of the dangerous situation more effectively.

  According to the vehicle warning device of the present invention, an increase in the number of parts can be suppressed.

The electric block diagram of the warning device for vehicles of an embodiment. The perspective view which shows typically the frame | skeleton of the electric seat in the same form. (A) (b) (c) The graph which shows the voltage applied to a motor based on the 1st-3rd vibration drive signal. The graph for demonstrating the vibration drive voltage applied to a motor in another example. The graph which shows the relationship between the magnitude | size of the danger level of the danger state of a vehicle, and the vibration drive voltage applied to a motor in another example.

Hereinafter, an embodiment of a vehicle warning device will be described.
As shown in FIG. 1, an electric seat 1 mounted on a vehicle is, for example, a driver's seat, and a seat cushion 2 as a seat portion and a seat provided to be tiltable at a rear end portion of the seat cushion 2. A back 3 and a motor M as a drive source for sliding the electric seat 1 in the front-rear direction are provided. The motor M is configured by a brushed DC motor having a power supply brush and a commutator (both not shown).

  As shown in FIG. 2, the electric seat 1 is slidably connected to a pair of rail members 4 that are fixed to a vehicle floor (not shown) along the longitudinal direction of the vehicle. The motor M is attached to the lower part of the front end in the center of the seat cushion 2 in the width direction (vehicle width direction). The rotational driving force of the motor M is transmitted through the output shaft 5 extending from the motor M in the width direction of the electric seat 1 and the speed reduction mechanisms 6 provided at both ends of the output shaft 5 in the width direction. 1 is converted into a sliding motion in the front-rear direction (longitudinal direction of the rail member 4). In the electric seat 1 of the present embodiment, a reclining drive motor that is a drive source for tilting drive of the seat back 3 and a lifter drive motor that is a drive source for height adjustment drive of the seat cushion 2 are the motor M. Although not provided, both motors are not shown for convenience of explanation.

  In addition, in the skeleton of the electric seat 1 (seat skeleton K), the left side portion KL on the left side (left side with respect to the vehicle traveling direction) of the width direction and the right side of the width direction center (right side with respect to the vehicle traveling direction). The right side portion KR is configured to have a different resonance frequency (natural frequency). In the present embodiment, the resonance frequency of the left portion KL of the seat skeleton K is 10 [Hz], and the resonance frequency of the right portion KR is 20 [Hz].

  As shown in FIG. 1, the vehicle warning device 10 of the present embodiment includes an electric seat 1 including the motor M, a drive circuit 11 that supplies driving power to the motor M, and a motor via the drive circuit 11. And a control circuit 12 for controlling the driving of M. In addition, the vehicle warning device 10 includes an in-vehicle camera 13 that monitors the surrounding situation of the vehicle, a camera ECU 14, and a vehicle ECU 15 to which the recognition information Sd from the camera ECU 14 is input.

  The electric seat 1 is provided with an operation switch SW. When the operation switch SW is operated by a passenger, for example, an operation signal is output from the operation switch SW to the control circuit 12. The control circuit 12 rotates the motor M through the drive circuit 11 based on the input of the operation signal, and slides the electric seat 1.

  The control circuit 12 includes an FB control unit (feedback control unit) 16 and a PWM control unit 17. The FB control unit 16 is based on the operation of the operation switch SW, and the difference between the actual speed of the motor M calculated from the rotation detection signal detected by the rotation sensor (not shown) mounted on the motor M and the speed command value. Speed feedback control is executed based on the value (speed deviation). Then, the voltage command value Vd calculated by the speed feedback control is output to the PWM control unit 17.

  The PWM control unit 17 calculates a DUTY command value based on the voltage command value Vd, generates a rotation drive signal Sc having an on-DUTY ratio indicated by the DUTY command value, and outputs the rotation drive signal Sc to the drive circuit 11 to drive the PWM control unit 17. The circuit 11 is PWM driven. As a result, a rotational drive voltage corresponding to the rotational drive signal Sc is output from the drive circuit 11 to the motor M. The motor M is rotationally driven by the output of the driving source, and the electric seat 1 is slid in the front-rear direction based on the rotational driving force.

  The in-vehicle camera 13 provided in the vehicle is a camera that captures the front of the vehicle, and outputs the captured image data to the camera ECU 14. The camera ECU 14 performs predetermined processing on the image data output from the in-vehicle camera 13, recognizes the situation around the vehicle (road lane in the present embodiment), and outputs the recognition information Sd to the vehicle ECU 15.

  When the vehicle ECU 15 determines the dangerous situation of the vehicle (in this embodiment, the danger of lane departure) based on the recognition information Sd output from the camera ECU 14, and determines that the vehicle is in a dangerous situation. The vehicle ECU 15 outputs any one of the left vibration request signal S1, the right vibration request signal Sr, and the total vibration request signal Sa to the PWM control unit 17.

  More specifically, when the vehicle ECU 15 determines that the vehicle may depart from the left lane based on the recognition information Sd (or deviates from the left lane), the vehicle ECU 15 outputs the left vibration request signal S1 to the PWM control unit 17. Output to. Further, when the vehicle ECU 15 determines that the vehicle may deviate from the right lane based on the recognition information Sd (or deviates from the right lane), the vehicle ECU 15 outputs the right vibration request signal Sr to the PWM control unit 17. To do. In addition, based on the recognition information Sd, for example, the vehicle ECU 15 outputs an overall vibration request signal Sa to the PWM control unit 17 when it is determined that the vehicle is in a state of greatly deviating from the lane.

  When receiving the left vibration request signal Sl from the vehicle ECU 15, the PWM control unit 17 generates a first vibration drive signal S <b> 1 and outputs the first vibration drive signal S <b> 1 to the drive circuit 11. Then, the PWM control unit 17 outputs the first vibration drive signal S1 to the drive circuit 11 until the input of the left vibration request signal Sl from the vehicle ECU 15 is interrupted.

  Further, when receiving the right vibration request signal Sr from the vehicle ECU 15, the PWM control unit 17 generates a second vibration drive signal S <b> 2 and outputs the second vibration drive signal S <b> 2 to the drive circuit 11. Then, the PWM control unit 17 outputs the second vibration drive signal S2 to the drive circuit 11 until the input of the right vibration request signal Sr from the vehicle ECU 15 is interrupted.

  Further, when receiving the total vibration request signal Sa from the vehicle ECU 15, the PWM control unit 17 generates a third vibration drive signal S <b> 3 and outputs the third vibration drive signal S <b> 3 to the drive circuit 11. Then, the PWM control unit 17 outputs the third vibration drive signal S3 to the drive circuit 11 until the input of the overall vibration request signal Sa from the vehicle ECU 15 is interrupted.

  Next, the first vibration drive voltage V1 applied to the motor M from the drive circuit 11 based on the first vibration drive signal S1, and the second applied from the drive circuit 11 to the motor M based on the second vibration drive signal S2. The third vibration drive voltage V3 applied from the drive circuit 11 to the motor M based on the vibration drive voltage V2 and the third vibration drive signal S3 will be described.

  As shown in FIGS. 3A to 3C, the first to third vibration drive voltages V1 to V3 are voltages that alternately repeat a positive value and a negative value. Here, the period T1 (see FIG. 3A) of the first vibration drive voltage V1 is set to a value corresponding to the resonance frequency (10 [Hz] in the present embodiment) of the left portion KL of the seat skeleton K. In this embodiment, (1/10) = 0.10 [s] is set. Further, the period T2 (see FIG. 3B) of the second vibration drive voltage V2 is set to a value corresponding to the resonance frequency (20 [Hz] in the present embodiment) of the right side portion KR of the seat skeleton K. In this embodiment, (1/20) = 0.05 [s] is set. As shown in FIG. 3C, the third vibration drive voltage V3 is a voltage that alternately repeats one cycle of the first vibration drive voltage V1 and one cycle of the second vibration drive voltage V2. . In the present embodiment, the amplitude values of the first to third vibration drive voltages V1 to V3 are set to be equal to each other.

  When the first vibration drive voltage V1 is applied to the motor M, the rotor (not shown) of the motor M repeats a minute forward / reverse rotation, whereby the frequency corresponding to the cycle T1 of the first vibration drive voltage V1. A vibration (first vibration) having a maximum gain with a component (10 [Hz] in the present embodiment) is generated in the motor M. Similarly, when the second vibration drive voltage V2 is applied to the motor M, the gain is maximum at a frequency component (20 [Hz] in the present embodiment) corresponding to the cycle T2 of the second vibration drive voltage V2. A vibration (second vibration) is generated in the motor M. Further, when the third vibration drive voltage V3 is applied to the motor M, vibration (hereinafter referred to as third vibration) obtained by combining the first vibration and the second vibration is generated in the motor M. Thus, when the first to third vibration drive voltages V1 to V3 are applied to the motor M and the first to third vibrations are generated in the motor M, the rotor of the motor M does not rotate. However, only a small forward / reverse rotation is repeated, and the sliding movement of the electric seat 1 in the front-rear direction does not occur.

  As shown in FIG. 2, when the first vibration is generated in the motor M, the first vibration is transmitted from the motor M to the seat skeleton K via the output shaft 5 and the speed reduction mechanism 6. Here, the first vibration is a vibration based on the first vibration drive voltage V1 in which the period T1 is set in accordance with the resonance frequency of the left side portion KL of the seat skeleton K. As described above, the first vibration has the period T1. This is vibration with the maximum gain at the corresponding frequency component (10 [Hz] in this embodiment). For this reason, when the first vibration is transmitted to the seat skeleton K, the left portion KL of the seat skeleton K mainly resonates due to the first vibration. At this time, vibration does not occur in the right side portion KR of the seat skeleton K or only weak vibration occurs. Therefore, the vibration of the left side portion KL of the seat skeleton K is mainly applied to the occupant seated in the electric seat 1. Can be given.

  Similarly, when the second vibration generated by the motor M is transmitted to the seat skeleton K, the right side portion KR of the seat skeleton K mainly resonates due to the second vibration. At this time, vibration is not generated in the left side portion KL of the seat skeleton K or only weak vibration is generated. Therefore, vibration of the right side portion KR of the seat skeleton K is mainly applied to the occupant seated on the electric seat 1. Can be given.

  Further, when the third vibration generated by the motor M is transmitted to the seat skeleton K, both the left portion KL and the right portion KR of the seat skeleton K (that is, the entire seat skeleton K) resonate. Yes.

Next, the operation of this embodiment will be described.
If the vehicle may deviate from the left lane during travel (or deviate from the left lane), the motor M vibrates based on the left vibration request signal S1 output from the vehicle ECU 15 to the PWM control unit 17. When driven, the left part KL of the seat skeleton K is resonated by the vibration. That is, the danger situation on the left side of the vehicle is notified by vibration (resonance) of the left side portion KL of the seat skeleton K.

  Similarly, when the vehicle may deviate from the right lane during travel (or deviate from the right lane), it is based on the right vibration request signal Sr output from the vehicle ECU 15 to the PWM control unit 17. Then, the motor M is driven to vibrate, and the vibration causes the right side portion KR of the seat skeleton K to resonate. That is, the danger situation on the right side of the vehicle is notified by vibration (resonance) of the right side portion KR of the seat skeleton K.

  Further, when the vehicle greatly deviates from the right or left lane during traveling, the motor M is driven to vibrate based on the overall vibration request signal Sa output from the vehicle ECU 15 to the PWM control unit 17, and the vibration causes the seat skeleton K. The whole is resonated.

As described above, in the vehicle warning device 10 of the present embodiment, it is possible to perform suitable notification by seat vibration according to the dangerous situation of the vehicle.
Next, characteristic effects of the present embodiment will be described.

  (1) The vehicle warning device 10 includes an electric seat 1 that is driven to be displaced based on the rotational driving force of the motor M, an in-vehicle camera 13, a camera ECU 14, and a vehicle ECU 15 (danger state detection) for detecting a dangerous situation of the vehicle. Part) and a control circuit 12 (vibration control part). The control circuit 12 then detects the displacement of the electric seat 1 via the drive circuit 11 based on the detection result of the dangerous situation in the vehicle ECU 15 (the left vibration request signal S1, the right vibration request signal Sr, and the whole vibration request signal Sa). The motor M is driven to vibrate in a manner that does not involve driving.

  According to this configuration, the motor M serving as a driving source for displacement driving of the electric seat 1 can be caused to function as a vibration source for vibrations for warning of a dangerous situation to the occupant. For this reason, in the vehicle warning device 10 that notifies the occupant of the dangerous situation by the vibration of the electric seat 1, an increase in the number of components can be suppressed.

  (2) The PWM control unit 17 of the control circuit 12 alternates between a positive value and a negative value based on the input of any one of the left vibration request signal S1, the right vibration request signal Sr, and the total vibration request signal Sa. Repeated voltages (first to third vibration drive voltages V <b> 1 to V <b> 3) are applied to the motor M via the drive circuit 11. As a result, the danger situation due to the vibration of the motor M can be notified without causing the electric seat 1 to be displaced.

  (3) The PWM control unit 17 drives the drive circuit 11 to drive the motor M to vibrate at a frequency corresponding to the resonance frequency of the left portion KL of the seat skeleton K based on the left vibration request signal S1 output from the vehicle ECU 15. Drive. Further, the PWM control unit 17 drives the drive circuit 11 to drive the motor M to vibrate at a frequency corresponding to the resonance frequency of the right portion KR of the seat skeleton K based on the right vibration request signal Sr output from the vehicle ECU 15. Let

  According to this configuration, the left part KL and the right part KR of the seat skeleton K can be individually resonated by the vibration of the motor M. As a result, the part of the seat skeleton K that is resonated by the vibration of the motor M can be changed according to the dangerous situation of the vehicle. For this reason, the variation of the notification of the dangerous situation by the seat vibration is increased, and as a result, the passenger can be more effectively warned of the dangerous situation.

  Further, the PWM controller 17 determines a voltage (the first vibration drive voltage V1 and the first vibration drive voltage V1) according to the resonance frequency of the left part KL and the right part KR of the seat skeleton K based on the total vibration request signal Sa output from the vehicle ECU 15. The drive circuit 11 is driven to apply the third vibration drive voltage V3), which is a combination of the two vibration drive voltages V2, to the motor M. Thereby, the whole sheet | seat frame | skeleton K can be resonated by the vibration drive of the motor M based on application of the 3rd vibration drive voltage V3.

  In addition, as described above, the vibration of the motor M is further applied to the occupant seated in the electric seat 1 by resonating the left part KL, the right part KR, or the whole of the seat skeleton K by vibration driving of the motor M. As a result, the danger situation of the vehicle can be more reliably notified to the occupant.

  (4) Since the motor M is provided at the center in the width direction (left-right direction) of the electric seat 1 (the seat skeleton K), the motor M is driven to vibrate (the first to third vibration drive voltages V1 to V3). Vibration based on application) can be suitably transmitted to the left side portion KL and the right side portion KR of the seat skeleton K. As a result, the seat skeleton K can be suitably resonated by the vibration drive of the motor M.

In addition, you may change the said embodiment as follows.
In the above embodiment, the amplitude values of the first to third vibration drive voltages V1 to V3 are equal to each other, but are not particularly limited to this, for example, the cycle is shorter than the first vibration drive voltage V1. The amplitude value of the second vibration drive voltage V2 may be set larger than the amplitude value of the first vibration drive voltage V1. According to this, it becomes possible to make the magnitude of the vibration of the motor M based on the application of the second vibration drive voltage V2 equal to the magnitude of the vibration of the motor M based on the application of the first vibration drive voltage V1.

  Although not specifically mentioned in the above embodiment, the amplitude values of the first to third vibration drive voltages V1 to V3 do not change with time. For example, as shown in FIG. 4, the first to third vibration drive voltages By increasing or decreasing the amplitude values of V1 to V3 with the passage of time, strong and weak waves may be given to the vibration of the motor M (sheet skeleton K). In addition, it is possible to give a strong or weak wave to the vibration of the motor M (the seat skeleton K) by slightly increasing or decreasing the periods T1 and T2 in the first to third vibration driving voltages V1 to V3 with the passage of time.

  Moreover, as shown in FIG. 5, you may change the amplitude value of the 1st-3rd vibration drive voltage V1-V3 according to the danger level of the dangerous situation of a vehicle. In the example of the figure, the amplitude values of the first to third vibration drive voltages V1 to V3 are set to be larger as the danger level of the dangerous situation of the vehicle is larger. Thereby, the variation of the notification of the dangerous situation due to the seat vibration is increased, and as a result, the passenger can be more effectively warned of the dangerous situation. The magnitude of the risk is determined based on the distance from the vehicle to the lane (or obstacle), for example, and it can be determined that the risk is higher as the distance to the lane (or obstacle) is shorter. .

  In the above embodiment, the third vibration drive voltage V3 applied to the motor M so as to resonate the entire seat skeleton K is equal to one cycle of the first vibration drive voltage V1 and one cycle of the second vibration drive voltage V2. Although the voltage is alternately repeated, the voltage is not particularly limited to this. For example, the period of the third vibration drive voltage V3 is set to an intermediate period (more preferably an average value of the periods T1 and T2) between the period T1 of the first vibration drive voltage V1 and the period T2 of the second vibration drive voltage V2. May be. As a result, the vibration frequency of the motor M based on the application of the third vibration drive voltage V3 is an intermediate frequency between the resonance frequency of the left portion KL and the resonance frequency of the right portion KR. The entire seat skeleton K can be resonated by the vibration drive of the motor M based on the application of the vibration drive voltage V3.

  The means for detecting external information of the vehicle is not limited to the in-vehicle camera 13 of the above embodiment. For example, an ultrasonic sensor or an optical radar for detecting the distance between the vehicle and the surrounding obstacle ( A distance measuring sensor such as a so-called LIDAR may be used. In the case where the in-vehicle camera 13 and the distance measuring sensor are used in combination, if the vehicle ECU 15 determines that there is a risk of collision with an obstacle based on the detection signal from the distance measuring sensor, the overall vibration request signal Sa is PWM-controlled. You may make it output to the part 17. FIG.

  Further, the vehicle ECU 15 may determine the danger situation of the vehicle not only based on the lane recognition information Sd but also include information such as the vehicle speed and the steering angle of the steering wheel. .

  In addition, an indoor camera for photographing the head of an occupant seated on the electric seat 1 is provided, and a dangerous situation (occupant's dozing state, aside look state, etc.) is detected based on the image data photographed by the indoor camera. A vibration request signal may be output to the PWM control unit 17 based on the detection result.

  In the above-described embodiment, the motor M as a drive source for sliding the electric seat 1 in the front-rear direction is used as a vibration source for warning vibration of the electric seat 1, but for example, the reclining drive motor Alternatively, a displacement driving motor for the electric seat 1 such as the lifter driving motor may be used as a vibration source for the warning vibration of the electric seat 1.

  In the above embodiment, the individual parts (the left part KL and the right part KR) of the seat skeleton K can be vibrated (resonated) by the vibration drive of one motor M. However, the present invention is particularly limited to this. It is not something. For example, one or more of a plurality of displacement driving motors (slide driving motor M, reclining driving motor, lifter driving motor, etc.) mounted on the electric seat 1 depending on the dangerous situation of the vehicle. It may be configured to vibrate and thereby vibrate the seat skeleton K for each individual part.

  In the above embodiment, the left part KL and the right part KR of the seat skeleton K can be individually vibrated (resonated). However, for example, the seat part and the backrest part of the seat skeleton K can be used. It is good also as a structure which can vibrate (resonate) individually. Further, the values of the resonance frequencies (natural frequencies) of the left part KL and the right part KR of the seat skeleton K in the above embodiment are examples, and may be appropriately changed according to the configuration.

  In the above embodiment, the motor is driven to vibrate at a frequency corresponding to the resonance frequency of the seat skeleton K. However, it is possible to allow the passenger to fully experience the vibration of the motor M via the electric seat 1. For example, it is not always necessary to drive the motor to vibrate at a frequency corresponding to the resonance frequency of the seat skeleton K.

  -You may combine embodiment mentioned above and each modification suitably.

  DESCRIPTION OF SYMBOLS 1 ... Electric seat, 10 ... Vehicle warning device, 12 ... Control circuit (vibration control part), 13 ... Car-mounted camera (dangerous situation detection part), 14 ... Camera ECU (dangerous situation detection part), 15 ... Vehicle ECU (danger Situation detection unit), M... Motor, K... Seat skeleton, KL... Left side part (first part) of sheet skeleton, KR .. right side part (second part) of sheet skeleton.

Claims (5)

An electric seat including a motor and driven to be displaced based on the rotational driving force of the motor;
A dangerous situation detector for detecting the dangerous situation of the vehicle;
A vehicle warning device comprising: a vibration control unit that vibrates and drives the motor based on a detection result of the dangerous situation detection unit without driving the displacement of the electric seat. The vehicle warning device according to claim 1,
The motor is a DC motor;
The vehicular warning device, wherein the vibration control unit drives the motor to vibrate in a manner not involving displacement driving of the electric seat by alternately applying a positive voltage and a negative voltage to the motor. The vehicle warning device according to claim 1 or 2,
The vehicle warning device, wherein the vibration control unit vibrates the motor at a frequency corresponding to a resonance frequency of the skeleton of the electric seat, and resonates the skeleton of the electric seat by vibration of the motor. The vehicle warning device according to claim 3,
The vibration control unit has a frequency corresponding to a resonance frequency of a first part in the skeleton of the electric seat or a resonance frequency of a second part in the skeleton of the electric seat according to a detection result of the dangerous situation detection unit. A warning device for a vehicle, wherein the motor is driven to vibrate at a frequency corresponding to the frequency. In the vehicle warning device according to any one of claims 1 to 4,
The vehicular warning device, wherein the vibration control unit changes the magnitude of the vibration drive amplitude of the motor in accordance with the risk level of the dangerous situation based on the detection result of the dangerous situation detection unit.

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