Vehicle seat, seat system, control method for vehicle seat, and control program for vehicle seat

Abstract

[Problem] To provide a vehicle seat that can guide the heartbeat of a driver at timing at which alleviation of stress can be achieved, a seat system that includes the vehicle seat, a control method for the vehicle seat, and a control program for the vehicle seat. [Solution] A vehicle seat 20 that is to be installed in a vehicle 2 has a seat body 28 that constitutes a driver seat 13, a vibration generation device 29 that applies vibration to a driver that is seated on the seat body, and control devices 5, 27 that, when the heart rate of the driver is outside a prescribed heartbeat range, can perform guidance processing that controls the vibration generation device to bring the heart rate of the driver toward a prescribed standard heart rate. The control devices are prohibited from performing the guidance processing when the amount of time that has passed from when the driver sat on the seat body is less than a prescribed prohibition duration τ.

Description

Vehicle seat, seat system, method for controlling a vehicle seat, and control program for a vehicle seat

[0001] The present invention relates to a vehicle seat, a seat system including the vehicle seat, a method for controlling the vehicle seat, and a control program for the vehicle seat.

[0002] Patent Document 1 discloses a vehicle equipped with an in-vehicle refresh system that can promote the effective use of time in the vehicle interior. The in-vehicle refresh system includes a camera that acquires the physical information of the seated person, a massage / exercise seat, a display device, and a control device.

[0003] Based on the information acquired by the camera, the control device acquires the situation of the seated person. Then, in order to improve the situation of the seated person, the control device presents a program suitable for the situation of the seated person to the display device for the seated person and executes the program input by the seated person to the display device.

[0004] For example, when the seated person has just exercised, the control device presents a massage program that massages the body of the seated person in order to reduce the fatigue of the seated person. For example, when the control device determines that the seated person lacks exercise, the control device presents an exercise program that performs training in order to improve the situation of the seated person.

[0005] Patent Document 2 discloses a biological information display device for improving the situation of the observed person. The biological information display device is a device that performs so-called heartbeat fluctuation biofeedback to increase the activity of the parasympathetic nerve of the autonomic nervous system and relieve stress, and displays a pulse wave indicating the pressure change in the blood vessels of the observed person on the display screen.

[0006] JP-A-2020-029108 JP-A-2022-163211

[0007] As exemplified in Patent Document 2, biofeedback has attracted attention as a technology that acquires the biological information of the observed person and feeds it back to the subject, thereby promoting an increase in the activity of the parasympathetic nerve of the autonomic nervous system and relieving the stress of the subject.

[0008] The inventors of this invention have conceived of a method to alleviate driver stress by generating vibrations using a vibration generator that guides the driver's heart rate to a standard heart rate (hereinafter referred to as "heart rate induction"). This stress reduction by heart rate induction is expected to contribute to improved vehicle safety, as it guides the driver into a state suitable for driving.

[0009] However, in cases such as when a driver gets into a vehicle immediately after exercise, an increase or decrease in heart rate may occur that is not caused by stress. In such cases, if heart rate monitoring is performed on the driver, there is a risk that the vibrations generated by the vibration generator may reduce the driver's concentration.

[0010] In view of the above background, the present invention aims to provide a vehicle seat that can induce heart rate in the driver at a timing that provides stress relief, a seat system including the vehicle seat, a method for controlling the vehicle seat, and a control program for the vehicle seat.

[0011] To solve the above problems, one aspect of the present invention provides a vehicle seat (20) mounted on a vehicle (2), comprising: a seat body (28) constituting a driver's seat (13); a vibration generating device (29) that provides vibration to a driver seated on the seat body; and a control device (5, 27) capable of performing induction processing to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate when the driver's heart rate is outside a predetermined heart rate range, wherein the control device prohibits the execution of the induction processing when the elapsed time since the driver sat on the seat body is less than a predetermined prohibition time (τ).

[0012] According to this embodiment, the induction process is prohibited until a prohibited time has elapsed after the driver sits in the seat. Therefore, if the driver's heart rate is outside the predetermined heart rate range due to factors other than stress, such as when the driver gets into the vehicle immediately after exercise, the induction process will not be executed immediately. Thus, it is possible to provide a vehicle seat that can perform heart rate induction on the driver at a timing that provides stress relief.

[0013] In the above embodiment, preferably, the control device stores identification information for identifying a person seated in the seat body in association with the standard heart rate of the person corresponding to the identification information, and sets the standard heart rate by acquiring the identification information of the driver.

[0014] According to this embodiment, a standard heart rate suitable for each driver can be set.

[0015] In the above embodiment, preferably, the control device stores identification information for identifying a person seated in the seat body, the heart rate range and standard heart rate of the person corresponding to the identification information, and sets the heart rate range and standard heart rate by acquiring the identification information of the driver.

[0016] According to this embodiment, a heart rate range and standard heart rate suitable for each driver can be set.

[0017] In the above embodiment, preferably, the control device stores identification information for identifying a person seated in the seat body and the standard heart rate of the person corresponding to the identification information in association with each other, acquires the identification information of the driver, acquires the corresponding standard heart rate based on the acquired identification information of the driver, and sets the heart rate range based on the acquired standard heart rate.

[0018] According to this embodiment, a heart rate range and standard heart rate suitable for each driver can be set.

[0019] In the above embodiment, preferably, the control device stores identification information for identifying a person seated in the seat body in association with the prohibited time, and sets the prohibited time by acquiring the identification information of the driver.

[0020] According to this embodiment, a prohibition period suitable for each driver can be set.

[0021] In the above embodiment, preferably, the control device determines that the driver's heart rate is outside the heart rate range when the driver's heart rate is greater than a predetermined upper heart rate value or less than a predetermined lower heart rate value.

[0022] According to this embodiment, heart rate guidance can be performed if the driver's heart rate is too high or too low.

[0023] In the above embodiment, preferably, the control device sets the frequency of the vibration to be generated by the vibration generator based on the driver's heart rate during the induction process.

[0024] According to this embodiment, heart rate guidance can be performed according to the driver's heart rate.

[0025] In the above embodiment, preferably, the control device sets the frequency of the vibration generated by the vibration generator to be between the driver's heart rate and the standard heart rate during the induction process.

[0026] According to this embodiment, the driver's heart rate can be appropriately guided to reach a standard heart rate.

[0027] To solve the above problems, one aspect of the present invention provides a seat system comprising: a seat body (28) constituting the driver's seat (13) of a vehicle (2); a vibration generating device (29) that applies vibration to a driver seated in the seat body; a heart rate sensor (25) that acquires biological information relating to the driver's heartbeat; and a control device (5, 27) that controls the vibration generating device, wherein the control device acquires the driver's heart rate based on the biological information acquired by the heart rate sensor, and is configured to execute an induction process that controls the vibration generating device to bring the driver's heart rate closer to a predetermined standard heart rate when the driver's heart rate is outside a predetermined heart rate range, and prohibits the execution of the induction process when the elapsed time since the driver sat in the seat body is less than a predetermined prohibition time (τ).

[0028] In this embodiment, the guidance process is prohibited until a prohibited time has elapsed after the driver sits in the seat. Therefore, if the driver's heart rate is outside the predetermined heart rate range due to factors other than stress, such as when the driver gets into the vehicle immediately after exercise, the guidance process will not be executed immediately. Thus, a seat system can be provided that provides heart rate guidance to the driver at a timing when the stress-relieving effect can be obtained.

[0029] To solve the above problems, one aspect of the present invention provides a control method for a vehicle seat (20) comprising a seat body (28) constituting the driver's seat (13) of a vehicle (2), a vibration generating device (29) that provides vibration to a driver seated on the seat body, and control devices (5, 27) that control the vibration generating device, wherein the control device is configured to acquire the driver's heart rate and, when the driver's heart rate is outside a predetermined heart rate range, to perform an induction process to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate, and to prohibit the execution of the induction process when the elapsed time since the driver sat on the seat body is less than a predetermined prohibition time (τ).

[0030] According to this embodiment, the induction process is prohibited until a prohibited time has elapsed after the driver sits in the seat. Therefore, if the driver's heart rate is outside the predetermined heart rate range due to factors other than stress, such as when the driver gets into the vehicle immediately after exercise, the induction process will not be executed immediately. Thus, a control method for a vehicle seat can be provided that enables heart rate induction to the driver at a timing that provides stress relief.

[0031] To solve the above problems, one aspect of the present invention provides a control program for a vehicle seat (20) comprising a seat body (28) constituting the driver's seat (13) of a vehicle (2), a vibration generating device (29) that provides vibration to a driver seated on the seat body, and control devices (5, 27) that control the vibration generating device, wherein the control device is configured to acquire the driver's heart rate and, when the driver's heart rate is outside a predetermined heart rate range, to execute an induction process to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate, and to prohibit the execution of the induction process when the elapsed time since the driver sat on the seat body is less than a predetermined prohibition time (τ).

[0032] According to this embodiment, the induction process is prohibited until a prohibited time has elapsed after the driver sits in the seat. Therefore, if the driver's heart rate is outside the predetermined heart rate range due to factors other than stress, such as when the driver gets into the vehicle immediately after exercise, the induction process will not be executed immediately. Thus, a control program for a vehicle seat can be provided that enables heart rate induction to the driver at a timing that provides stress relief.

[0033] Furthermore, if the vibration generator is activated while the driver is continuously operating the vehicle for a sufficient period of time without experiencing stress, the vibrations generated by the device may reduce the driver's concentration. Therefore, it is necessary to perform heart rate induction at a time when the stress-reducing effect can be achieved.

[0034] Therefore, the challenge is to provide a vehicle seat that can guide the driver's heart rate at a time when stress reduction effects can be obtained, a seat system including the vehicle seat, a control method for the vehicle seat, and a control program for the vehicle seat.

[0035] To solve the above problems, one aspect of the present invention provides a vehicle seat (20) mounted on a vehicle (2), comprising: a seat body (28) constituting a driver's seat (13); a vibration generating device (29) that provides vibration to a driver seated on the seat body; and a control device (5, 27) that acquires the power status of the vehicle and the heart rate of the driver, and when the power of the vehicle is on and the driver's heart rate is outside a predetermined heart rate range, it is capable of executing an induction process to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate, wherein the control device stores the time when the power of the vehicle was turned on as a reference time, and executes the induction process when the elapsed time from the reference time is less than a predetermined execution time (δ).

[0036] According to this embodiment, the induction process is executed when the elapsed time from the reference time when the vehicle's power is turned on is less than the execution time. Therefore, since the induction process is executed between the time the driver gets into the vehicle and when they begin to operate the vehicle stably, it is possible to provide a vehicle seat that can provide heart rate guidance to the driver at a timing that provides a stress-reducing effect.

[0037] In the above embodiment, preferably, the control device updates the reference time to the current time when the power to the vehicle is switched from off to on.

[0038] According to this embodiment, the reference time can be set by a simple method.

[0039] In the above embodiment, preferably, when the power supply of the vehicle is switched from off to on, the control device acquires the time interval from off to on, updates the reference time to the current time if the time interval is greater than a predetermined threshold, and maintains the reference time without updating it if the time interval is less than or equal to the threshold.

[0040] According to this embodiment, if a vehicle is switched on again within a short period of time less than the threshold after being turned off, the reference time is maintained without being updated. Therefore, when there is a period of time shorter than the threshold during which the vehicle was turned off, that period can be ignored when setting the reference time.

[0041] In the above aspect, preferably, the control device stores, in an associated manner, specific information for identifying a person sitting on the seat body and the standard heart rate of the person corresponding to the specific information, and sets the standard heart rate by acquiring the specific information of the driver.

[0042] According to this aspect, a standard heart rate suitable for each driver can be set.

[0043] In the above aspect, preferably, the control device stores, in an associated manner, specific information for identifying a person sitting on the seat body, the heart rate range and the standard heart rate of the person corresponding to the specific information, and sets the heart rate range and the standard heart rate by acquiring the specific information of the driver.

[0044] According to this aspect, a heart rate range and a standard heart rate suitable for each driver can be set.

[0045] In the above aspect, preferably, the control device stores, in an associated manner, specific information for identifying a person sitting on the seat body and the standard heart rate of the person corresponding to the specific information, acquires the specific information of the driver, acquires the corresponding standard heart rate based on the acquired specific information of the driver, and sets the heart rate range based on the acquired standard heart rate.

[0046] According to this aspect, a heart rate range and a standard heart rate suitable for each driver can be set.

[0047] In the above aspect, preferably, the control device stores, in an associated manner, specific information for identifying a person sitting on the seat body and the execution time, and sets the execution time by acquiring the specific information of the driver.

[0048] According to this aspect, an execution time suitable for each driver can be set.

[0049] In the above embodiment, preferably, the driver's heart rate is determined to be outside the heart rate range when the driver's heart rate is greater than a predetermined upper heart rate value or less than a predetermined lower heart rate value.

[0050] According to this embodiment, heart rate guidance can be performed if the driver's heart rate is too high or too low.

[0051] In the above embodiment, preferably, the control device sets the frequency of the vibration to be generated by the vibration generator based on the driver's heart rate during the induction process.

[0052] According to this embodiment, heart rate guidance can be performed according to the driver's heart rate.

[0053] In the above embodiment, preferably, the control device sets the frequency of the vibration generated by the vibration generator to be between the driver's heart rate and the standard heart rate during the induction process.

[0054] According to this embodiment, the driver's heart rate can be appropriately guided to reach a standard heart rate.

[0055] To solve the above problems, one aspect of the present invention provides a seat system (1) comprising: a seat body (28) constituting the driver's seat (13) of a vehicle (2); a vibration generating device (29) that provides vibration to a driver seated in the seat body; a heart rate sensor (25) that acquires biological information relating to the driver's heartbeat; and a control device (5, 27) that controls the vibration generating device, wherein the control device acquires the power status of the vehicle, acquires the driver's heart rate based on the biological information acquired by the heart rate sensor, and is configured to execute an induction process to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate when the power of the vehicle is on and the driver's heart rate is outside a predetermined heart rate range, and stores the time when the power of the vehicle was turned on as a reference time, and executes the induction process when the elapsed time from the reference time is less than a predetermined execution time (δ).

[0056] According to this embodiment, the guidance process is executed when the elapsed time from the reference time when the vehicle's power is turned on is less than the execution time. Therefore, since the guidance process is executed between the time the driver gets into the vehicle and the time when they begin to operate the vehicle stably, a seat system can be provided that provides heart rate guidance to the driver at a timing that yields a stress-relieving effect.

[0057] To solve the above problems, one aspect of the present invention provides a control method for a vehicle seat (20) comprising a seat body (28) constituting the driver's seat (13) of a vehicle (2), a vibration generating device (29) that provides vibration to a driver seated in the seat body, and control devices (5, 27) that control the vibration generating device, wherein the control device acquires the power status of the vehicle and the heart rate of the driver, and is configured to execute an induction process to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate when the power of the vehicle is on and the driver's heart rate is outside a predetermined heart rate range, and stores the time when the power of the vehicle was turned on as a reference time, and executes the induction process when the elapsed time from the reference time is less than a predetermined execution time (δ).

[0058] According to this embodiment, the induction process is executed when the elapsed time from the reference time when the vehicle's power is turned on is less than the execution time. Therefore, since the induction process is executed between the time the driver gets into the vehicle and when they begin to operate the vehicle stably, it is possible to provide a vehicle seat control method that enables heart rate induction to the driver at a timing that provides a stress-relieving effect.

[0059] To solve the above problems, one aspect of the present invention provides a control program for a vehicle seat (20) comprising a seat body (28) constituting the driver's seat (13) of a vehicle (2), a vibration generating device (29) that provides vibration to a driver seated in the seat body, and control devices (5, 27) that control the vibration generating device, wherein the control device acquires the power status of the vehicle and the heart rate of the driver, and is configured to execute an induction process to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate when the power of the vehicle is on and the driver's heart rate is outside a predetermined heart rate range, and the control device stores the time when the power of the vehicle was turned on as a reference time, and executes the induction process when the elapsed time from the reference time is less than a predetermined execution time (δ).

[0060] According to this embodiment, the guidance process is executed when the elapsed time from the reference time when the vehicle's power is turned on is less than the execution time. Therefore, since the guidance process is executed between the time the driver gets into the vehicle and the time when they begin to operate the vehicle stably, it is possible to provide a vehicle seat control program that can provide heart rate guidance to the driver at a timing that provides a stress-relieving effect.

[0061] Japanese Patent Publication No. 2016-153960 discloses a vehicle system. The vehicle system changes the intensity of vibration of the vehicle seat according to the distance to the destination and the degree of driver concentration.

[0062] However, Patent Document 1 does not disclose a specific method for inducing heart rate from occupants. Since heart rate induction can reduce the driver's concentration, it needs to be performed under appropriate driving conditions.

[0063] Therefore, a challenge in vehicle systems is to provide heart rate guidance to occupants at the appropriate time.

[0064] To solve the above problems, one embodiment of the vehicle system includes a heart rate induction device that induces fluctuations in the heart rate of a person seated in a vehicle seat provided in the vehicle, a heart rate measurement device that measures the heart rate of the person seated, a movement status determination device that determines the movement status of the vehicle, and when the heart rate is higher than a first threshold and the movement status determination device determines that the vehicle is moving in a location other than a highway merging area, the heart rate induction device is operated to decrease the heart rate of the person seated, and when the movement status determination device determines that the vehicle is moving in the merging area, the operation of the heart rate induction device is prohibited.

[0065] In this configuration, when the vehicle is traveling in a highway merging area, the operation of the heart rate monitoring device is prohibited, allowing the occupant to concentrate on driving. In this way, the vehicle system can provide heart rate monitoring to the occupant at an appropriate time.

[0066] In the above embodiment, the control device may prohibit the operation of the heart rate induction device when the movement status determination device determines that the vehicle is moving in the acceleration area of ​​the merging lane in the merging area.

[0067] In this configuration, the operation of the heart rate monitoring device is prohibited when the vehicle is traveling in the acceleration zone, allowing the occupants to concentrate on driving.

[0068] In the above embodiment, the control device may prohibit the operation of the heart rate induction device when the movement status determination device determines that the vehicle is moving on the main line in the merging area.

[0069] In this configuration, when the vehicle is traveling on the main lane in a merging area, the operation of the heart rate monitoring device is prohibited, allowing the occupants to concentrate on driving.

[0070] In the above embodiment, the control device may prohibit the operation of the heart rate induction device when the movement status determination device determines that the vehicle is moving in the first lane of the main line adjacent to the acceleration area.

[0071] In this configuration, when the vehicle is traveling in the first lane of a merging area, the operation of the heart rate monitoring device is prohibited, allowing the occupants to concentrate on driving.

[0072] In the above embodiment, the control device may prohibit the operation of the heart rate induction device when the movement status determination device determines that the vehicle is moving in the second lane adjacent to the first lane on the opposite side of the main line from the acceleration area.

[0073] In this configuration, when the vehicle is traveling in the second lane of a merging area, the operation of the heart rate monitoring device is prohibited, allowing the occupants to concentrate on driving.

[0074] In the above embodiment, the vehicle may be equipped with a moving object detection device for detecting moving objects around the vehicle, and the control device may enable the operation of the heart rate induction device if the heart rate is higher than a first threshold and the vehicle is moving in a lane other than the lane adjacent to the acceleration area on the main line, and after prohibiting the operation of the heart rate induction device, the moving object detection device detects a moving object.

[0075] According to this embodiment, after the vehicle has passed through the merging area, the heart rate induction device becomes operational and can perform heart rate induction on the occupants.

[0076] In the above embodiment, the vehicle is provided with a moving object detection device for detecting moving objects around the vehicle, and the control device may enable the operation of the heart rate induction device if the heart rate is higher than a first threshold and the movement status determination device determines that the vehicle is moving in a lane other than the lane adjacent to the acceleration area on the main line, and after prohibiting the operation of the heart rate induction device, the moving object detection device does not detect a moving object.

[0077] According to this embodiment, after the vehicle has passed through the merging area, the heart rate induction device becomes operational and can perform heart rate induction on the occupants.

[0078] In the above embodiment, the control device may enable the operation of the heart rate induction device if, after the heart rate is higher than the first threshold and the movement status determination device determines that the vehicle is moving through the merging area and prohibits the operation of the heart rate induction device, the movement status determination device determines that the vehicle has moved a predetermined distance away from the merging area.

[0079] According to this embodiment, after the vehicle has passed through the merging area, the heart rate induction device becomes operational and can perform heart rate induction on the occupants.

[0080] In the above embodiment, the heart rate guidance device may be provided on the vehicle seat. Alternatively, the heart rate guidance device may be a wearable device attached to the seated person.

[0081] One embodiment is a vehicle system comprising: a heart rate induction device for inducing fluctuations in the heart rate of a person seated in a vehicle seat provided in the vehicle; a heart rate measurement device for measuring the heart rate of the person seated; a movement status determination device for determining the movement status of the vehicle; and a control device that, if the heart rate is higher than a first threshold and the movement status determination device determines that the acceleration of the vehicle is less than or equal to a preset first acceleration threshold, operates the heart rate induction device to reduce the heart rate; and if the movement status determination device determines that the acceleration of the vehicle is greater than the first acceleration threshold, prohibits the operation of the heart rate induction device.

[0082] In the above embodiment, the vehicle is provided with a moving object detection device for detecting moving objects around the vehicle, and the control device may release the state prohibiting the operation of the heart rate induction device when the vehicle is determined to have overtaken a first moving object detected by the moving object detection device, in a state where the acceleration of the vehicle is determined to be greater than the first acceleration threshold and the operation of the heart rate induction device is prohibited.

[0083] According to this embodiment, an appropriate method for inducing the heart rate of an occupant can be provided in a vehicle system.

[0084] In the above embodiment, the control device may maintain the state in which the heart rate induction device is prohibited from operating when, in a state in which the movement status determination device determines that the acceleration of the vehicle is greater than the first acceleration threshold and the operation of the heart rate induction device is prohibited, the movement detection device determines that the vehicle has overtaken the first moving object detected by the vehicle detection device, and a second moving object is detected in front of the first moving object within a preset range.

[0085] According to this embodiment, the driver can maintain a condition suitable for driving.

[0086] In the above embodiment, the system is equipped with a notification device for informing the seated person of information, and the control device may operate the notification device if it is determined that the acceleration of the second moving body is less than or equal to a preset second acceleration threshold.

[0087] According to this embodiment, the driver can be notified that the second moving object has come to a sudden stop or decelerated suddenly.

[0088] In the above embodiment, the vehicle is provided with a moving object detection device for detecting moving objects around the vehicle, and the control device may release the state prohibiting the operation of the heart rate induction device when the vehicle is determined to have overtaken a first moving object detected by the moving object detection device, in a state where the acceleration of the vehicle is determined to be greater than the first acceleration threshold and the operation of the heart rate induction device is prohibited.

[0089] According to this embodiment, the driver can maintain a moderate level of concentration.

[0090] In the above embodiment, the control device may maintain the state in which the heart rate induction device is prohibited from operating when, in a state in which the heart rate is higher than the first threshold and the vehicle's acceleration is determined to be greater than the first acceleration threshold by the movement status determination device, the vehicle has been determined to have overtaken the first moving object detected by the moving object detection device, and a second moving object is detected in front of the first moving object within a preset range.

[0091] According to this embodiment, the driver can maintain a moderate level of concentration.

[0092] In the above embodiment, the system is equipped with a notification device for informing the seated person of information, and the control device may operate the notification device if it is determined that the acceleration of the second moving body is less than or equal to a preset second acceleration threshold.

[0093] According to this embodiment, the driver can be notified that the second moving object has come to a sudden stop or decelerated suddenly.

[0094] In the above embodiment, the control device may activate the notification device when the moving object detection device determines that the third moving object is approaching from the rear.

[0095] According to this embodiment, the driver can be notified that a third moving object is approaching from behind.

[0096] One embodiment is a vehicle system comprising: a heart rate induction device for inducing fluctuations in the heart rate of a person seated in a vehicle seat provided in the vehicle; a heart rate measurement device for measuring the heart rate of the person seated in the vehicle seat; a movement status determination device for determining the movement status of the vehicle; a sign determination device for determining road signs present around the vehicle; and a control device that, when the heart rate is higher than a first threshold and the movement status determination device determines that the vehicle is moving in an urban area, determines whether or not to operate the heart rate induction device based on the type of road sign determined by the sign determination device.

[0097] According to this embodiment, an appropriate method for inducing the heart rate of an occupant can be provided in a vehicle system.

[0098] In the above embodiment, the control device may determine whether or not to prohibit the operation of the heart rate induction device based on the type of road sign determined by the sign determination device.

[0099] According to this embodiment, the heart rate induction device can be appropriately controlled in urban areas where there is a possibility of people or other objects suddenly appearing.

[0100] In the above embodiment, the control device may prohibit the operation of the heart rate induction device until a predetermined time has elapsed or until the vehicle has traveled a predetermined distance, if the road sign determined by the sign determination device is a sign indicating a vehicle stopping place.

[0101] According to this embodiment, the driver can maintain a reasonable level of concentration in places where there is a possibility of a person suddenly appearing.

[0102] In the above embodiment, the control device may prohibit the operation of the heart rate induction device until a predetermined time has elapsed or until the vehicle has traveled a predetermined distance, if the road sign determined by the sign determination device is a sign indicating a bus stop as a stopping place for the vehicle.

[0103] According to this embodiment, the driver can maintain a reasonable level of concentration in places where there is a possibility of a person suddenly appearing.

[0104] In the above embodiment, the control device may prohibit the operation of the heart rate induction device until a predetermined time has elapsed or until the vehicle has traveled a predetermined distance, if the road sign determined by the sign determination device is a sign indicating a taxi stand as a stopping place for the vehicle.

[0105] According to this embodiment, the driver can maintain a reasonable level of concentration in places where there is a possibility of a person suddenly appearing.

[0106] In the above embodiment, the control device may prohibit the operation of the heart rate induction device until a predetermined time has elapsed or until the vehicle has traveled a predetermined distance, if the road sign determined by the sign determination device is a sign indicating a parking area as a stopping place for the vehicle.

[0107] According to this embodiment, the driver can maintain a reasonable level of concentration in places where there is a possibility of a person suddenly appearing.

[0108] In the above embodiment, the control device may, if the road sign determined by the sign determination device is a sign indicating the possibility of an animal suddenly appearing, prohibit the operation of the heart rate induction device until a predetermined time has elapsed or until the vehicle has traveled a predetermined distance.

[0109] According to this embodiment, the driver can maintain a reasonable level of concentration in places where animals may suddenly appear.

[0110] In the above embodiment, the control device may, when the road sign determined by the sign determination device is a sign indicating merging traffic, prohibit the operation of the heart rate induction device until a predetermined time has elapsed or until the vehicle has traveled a predetermined distance.

[0111] According to this embodiment, the driver can maintain a reasonable level of concentration in a location where other moving objects may suddenly appear.

[0112] One embodiment is a vehicle system comprising: a heart rate induction device that induces fluctuations in the heart rate of a person seated in a vehicle seat provided in the vehicle; a heart rate measurement device that measures the heart rate of the person seated in the vehicle seat; a driver emotion determination device that determines the emotions of the driver of the vehicle; and a control device that controls the operation of the heart rate induction device based on the heart rate and the emotions of the driver.

[0113] According to this embodiment, an appropriate method for inducing heart rate in the occupants can be provided.

[0114] In the above embodiment, the control device may include a movement status determination device for determining the movement status of the vehicle, and the control device may prohibit the operation of the heart rate induction device when the movement status determination device determines that the vehicle is not moving.

[0115] According to this embodiment, the seated person can maintain a state suitable for resting.

[0116] In the above embodiment, the control device may move at least one of the vehicle seat and the other seat so that they move closer together when there are occupants in both the vehicle seat and the other seat in the vehicle where a separate seat different from the vehicle seat is present.

[0117] According to this embodiment, seated individuals can be brought closer together.

[0118] In the above embodiment, the control device may, in a vehicle having a separate seat different from the vehicle seat, rotate at least one of the vehicle seat and the separate seat so that both the vehicle seat and the separate seat face each other when there are occupants in both seats.

[0119] According to this embodiment, seated individuals can be seated facing each other.

[0120] One aspect of the present invention is a vehicle seat (20) mounted on a vehicle (2), comprising: a seat body (28) constituting a driver's seat (13); a vibration generating device (29) that provides vibration to a driver seated on the seat body; and a control device (5, 27) capable of performing induction processing to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate when the driver's heart rate is outside a predetermined heart rate range, wherein the control device prohibits the execution of the induction processing when the elapsed time since the driver sat on the seat body is less than a predetermined prohibition time (τ).

[0121] According to this embodiment, the induction process is prohibited until a prohibited time has elapsed after the driver sits in the seat. Therefore, if the driver's heart rate is outside the predetermined heart rate range due to factors other than stress, such as when the driver gets into the vehicle immediately after exercise, the induction process will not be executed immediately. Thus, it is possible to provide a vehicle seat that can perform heart rate induction on the driver at a timing that provides stress relief.

[0122] In the above embodiment, preferably, the control device stores identification information for identifying a person seated in the seat body in association with the standard heart rate of the person corresponding to the identification information, and sets the standard heart rate by acquiring the identification information of the driver.

[0123] According to this embodiment, a standard heart rate suitable for each driver can be set.

[0124] In the above embodiment, preferably, the control device stores identification information for identifying a person seated in the seat body, the heart rate range and standard heart rate of the person corresponding to the identification information, and sets the heart rate range and standard heart rate by acquiring the identification information of the driver.

[0125] According to this embodiment, a heart rate range and standard heart rate suitable for each driver can be set.

[0126] In the above embodiment, preferably, the control device stores identification information for identifying a person seated in the seat body and the standard heart rate of the person corresponding to the identification information in association with each other, acquires the identification information of the driver, acquires the corresponding standard heart rate based on the acquired identification information of the driver, and sets the heart rate range based on the acquired standard heart rate.

[0127] According to this embodiment, a heart rate range and standard heart rate suitable for each driver can be set.

[0128] In the above embodiment, preferably, the control device stores identification information for identifying a person seated in the seat body in association with the prohibited time, and sets the prohibited time by acquiring the identification information of the driver.

[0129] According to this embodiment, a prohibition period suitable for each driver can be set.

[0130] In the above embodiment, preferably, the control device determines that the driver's heart rate is outside the heart rate range when the driver's heart rate is greater than a predetermined upper heart rate value or less than a predetermined lower heart rate value.

[0131] According to this embodiment, heart rate guidance can be performed if the driver's heart rate is too high or too low.

[0132] In the above embodiment, preferably, the control device sets the frequency of the vibration to be generated by the vibration generator based on the driver's heart rate during the induction process.

[0133] According to this embodiment, heart rate guidance can be performed according to the driver's heart rate.

[0134] In the above embodiment, preferably, the control device sets the frequency of the vibration generated by the vibration generator to be between the driver's heart rate and the standard heart rate during the induction process.

[0135] According to this embodiment, the driver's heart rate can be appropriately guided to reach a standard heart rate.

[0136] One aspect of the present invention is a seat system comprising: a seat body (28) constituting the driver's seat (13) of a vehicle (2); a vibration generating device (29) that applies vibration to a driver seated in the seat body; a heart rate sensor (25) that acquires biological information relating to the driver's heartbeat; and a control device (5, 27) that controls the vibration generating device, wherein the control device acquires the driver's heart rate based on the biological information acquired by the heart rate sensor, and is configured to execute an induction process to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate when the driver's heart rate is outside a predetermined heart rate range, and prohibits the execution of the induction process when the elapsed time since the driver sat in the seat body is less than a predetermined prohibition time (τ).

[0137] In this embodiment, the guidance process is prohibited until a prohibited time has elapsed after the driver sits in the seat. Therefore, if the driver's heart rate is outside the predetermined heart rate range due to factors other than stress, such as when the driver gets into the vehicle immediately after exercise, the guidance process will not be executed immediately. Thus, a seat system can be provided that provides heart rate guidance to the driver at a timing when the stress-relieving effect can be obtained.

[0138] One aspect of the present invention is a control method for a vehicle seat (20) comprising a seat body (28) constituting the driver's seat (13) of a vehicle (2), a vibration generating device (29) that provides vibration to a driver seated in the seat body, and control devices (5, 27) that control the vibration generating device, wherein the control device is configured to acquire the driver's heart rate and, when the driver's heart rate is outside a predetermined heart rate range, to perform an induction process to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate, and to prohibit the execution of the induction process when the elapsed time since the driver sat in the seat body is less than a predetermined prohibition time (τ).

[0139] According to this embodiment, the induction process is prohibited until a prohibited time has elapsed after the driver sits in the seat. Therefore, if the driver's heart rate is outside the predetermined heart rate range due to factors other than stress, such as when the driver gets into the vehicle immediately after exercise, the induction process will not be executed immediately. Thus, a control method for a vehicle seat can be provided that enables heart rate induction to the driver at a timing that provides stress relief.

[0140] One aspect of the present invention is a control program for a vehicle seat (20) comprising a seat body (28) constituting the driver's seat (13) of a vehicle (2), a vibration generating device (29) that provides vibration to a driver seated in the seat body, and control devices (5, 27) that control the vibration generating device, wherein the control device is configured to acquire the driver's heart rate and, when the driver's heart rate is outside a predetermined heart rate range, to execute an induction process to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate, and to prohibit the execution of the induction process when the elapsed time since the driver sat in the seat body is less than a predetermined prohibition time (τ).

[0141] According to this embodiment, the induction process is prohibited until a prohibited time has elapsed after the driver sits in the seat. Therefore, if the driver's heart rate is outside the predetermined heart rate range due to factors other than stress, such as when the driver gets into the vehicle immediately after exercise, the induction process will not be executed immediately. Thus, a control program for a vehicle seat can be provided that enables heart rate induction to the driver at a timing that provides stress relief.

[0142] One embodiment is a vehicle seat (20) mounted on a vehicle (2), comprising: a seat body (28) constituting a driver's seat (13); a vibration generating device (29) that provides vibration to a driver seated on the seat body; and a control device (5, 27) that acquires the power status of the vehicle and the heart rate of the driver, and when the power of the vehicle is on and the driver's heart rate is outside a predetermined heart rate range, it executes an induction process to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate, wherein the control device stores the time when the power of the vehicle was turned on as a reference time, and executes the induction process when the elapsed time from the reference time is less than a predetermined execution time (δ).

[0143] According to this embodiment, the induction process is executed when the elapsed time from the reference time when the vehicle's power is turned on is less than the execution time. Therefore, since the induction process is executed between the time the driver gets into the vehicle and when they begin to operate the vehicle stably, it is possible to provide a vehicle seat that can provide heart rate guidance to the driver at a timing that provides a stress-reducing effect.

[0144] In the above embodiment, preferably, the control device updates the reference time to the current time when the power to the vehicle is switched from off to on.

[0145] According to this embodiment, the reference time can be set by a simple method.

[0146] In the above embodiment, preferably, when the power supply of the vehicle is switched from off to on, the control device acquires the time interval from off to on, updates the reference time to the current time if the time interval is greater than a predetermined threshold, and maintains the reference time without updating it if the time interval is less than or equal to the threshold.

[0147] According to this embodiment, if a vehicle is switched on again within a short period of time less than the threshold after being turned off, the reference time is maintained without being updated. Therefore, when there is a period of time shorter than the threshold during which the vehicle was turned off, that period can be ignored when setting the reference time.

[0148] In the above embodiment, preferably, the control device stores identification information for identifying a person seated in the seat body in association with the standard heart rate of the person corresponding to the identification information, and sets the standard heart rate by acquiring the identification information of the driver.

[0149] According to this embodiment, a standard heart rate suitable for each driver can be set.

[0150] In the above embodiment, preferably, the control device stores identification information for identifying a person seated in the seat body, the heart rate range and standard heart rate of the person corresponding to the identification information, and sets the heart rate range and standard heart rate by acquiring the identification information of the driver.

[0151] According to this embodiment, a heart rate range and standard heart rate suitable for each driver can be set.

[0152] In the above embodiment, preferably, the control device stores identification information for identifying a person seated in the seat body and the standard heart rate of the person corresponding to the identification information in association with each other, acquires the identification information of the driver, acquires the corresponding standard heart rate based on the acquired identification information of the driver, and sets the heart rate range based on the acquired standard heart rate.

[0153] According to this embodiment, a heart rate range and standard heart rate suitable for each driver can be set.

[0154] In the above embodiment, preferably, the control device stores identification information for identifying a person seated in the seat body in association with the execution time, and sets the execution time by acquiring the identification information of the driver.

[0155] According to this embodiment, the appropriate execution time can be set for each driver.

[0156] In the above embodiment, preferably, the control device determines that the driver's heart rate is outside the heart rate range when the driver's heart rate is greater than a predetermined upper heart rate value or less than a predetermined lower heart rate value.

[0157] According to this embodiment, heart rate guidance can be performed if the driver's heart rate is too high or too low.

[0158] In the above embodiment, preferably, the control device sets the frequency of the vibration to be generated by the vibration generator based on the driver's heart rate during the induction process.

[0159] According to this embodiment, heart rate guidance can be performed according to the driver's heart rate.

[0160] In the above embodiment, preferably, the control device sets the frequency of the vibration generated by the vibration generator to be between the driver's heart rate and the standard heart rate during the induction process.

[0161] According to this embodiment, the driver's heart rate can be appropriately guided to reach a standard heart rate.

[0162] One embodiment is a seat system (1) comprising a seat body (28) constituting the driver's seat (13) of a vehicle (2), a vibration generating device (29) that provides vibration to a driver seated in the seat body, a heart rate sensor (25) that acquires biological information relating to the driver's heartbeat, and a control device (5, 27) that controls the vibration generating device, wherein the control device acquires the power status of the vehicle, acquires the driver's heart rate based on the biological information acquired by the heart rate sensor, and is configured to execute an induction process to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate when the power of the vehicle is on and the driver's heart rate is outside a predetermined heart rate range, stores the time when the power of the vehicle was turned on as a reference time, and executes the induction process when the elapsed time from the reference time is less than a predetermined execution time (δ).

[0163] According to this embodiment, the guidance process is executed when the elapsed time from the reference time when the vehicle's power is turned on is less than the execution time. Therefore, since the guidance process is executed between the time the driver gets into the vehicle and the time when they begin to operate the vehicle stably, a seat system can be provided that provides heart rate guidance to the driver at a timing that yields a stress-relieving effect.

[0164] One embodiment is a control method for a vehicle seat (20) comprising a seat body (28) constituting the driver's seat (13) of a vehicle (2), a vibration generating device (29) that provides vibration to a driver seated in the seat body, and control devices (5, 27) that control the vibration generating device, wherein the control device acquires the power status of the vehicle and the heart rate of the driver, and is configured to execute an induction process to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate when the power of the vehicle is on and the driver's heart rate is outside a predetermined heart rate range, and stores the time when the power of the vehicle was turned on as a reference time, and executes the induction process when the elapsed time from the reference time is less than a predetermined execution time (δ).

[0165] According to this embodiment, the induction process is executed when the elapsed time from the reference time when the vehicle's power is turned on is less than the execution time. Therefore, since the induction process is executed between the time the driver gets into the vehicle and when they begin to operate the vehicle stably, it is possible to provide a vehicle seat control method that enables heart rate induction to the driver at a timing that provides a stress-relieving effect.

[0166] One embodiment is a control program for a vehicle seat (20) comprising a seat body (28) constituting the driver's seat (13) of a vehicle (2), a vibration generating device (29) that provides vibration to a driver seated in the seat body, and control devices (5, 27) that control the vibration generating device, wherein the control device acquires the power status of the vehicle and the heart rate of the driver, and is configured to execute an induction process to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate when the power of the vehicle is on and the driver's heart rate is outside a predetermined heart rate range, and the control device stores the time when the power of the vehicle was turned on as a reference time, and executes the induction process when the elapsed time from the reference time is less than a predetermined execution time (δ).

[0167] According to this embodiment, the guidance process is executed when the elapsed time from the reference time when the vehicle's power is turned on is less than the execution time. Therefore, since the guidance process is executed between the time the driver gets into the vehicle and the time when they begin to operate the vehicle stably, it is possible to provide a vehicle seat control program that can provide heart rate guidance to the driver at a timing that provides a stress-relieving effect.

[0168] One embodiment is a vehicle system comprising: a heart rate induction device for inducing fluctuations in the heart rate of a person seated in a vehicle seat provided in the vehicle; a heart rate measurement device for measuring the heart rate of the person seated; a movement status determination device for determining the movement status of the vehicle; and when the heart rate is higher than a first threshold and the movement status determination device determines that the vehicle is moving in a location other than a highway merging area, the heart rate induction device is activated to reduce the heart rate of the person seated; and when the movement status determination device determines that the vehicle is moving in the merging area, the operation of the heart rate induction device is prohibited.

[0169] In this configuration, when the vehicle is traveling in a highway merging area, the operation of the heart rate monitoring device is prohibited, allowing the occupant to concentrate on driving. In this way, the vehicle system can provide heart rate monitoring to the occupant at an appropriate time.

[0170] In the above embodiment, the control device may prohibit the operation of the heart rate induction device when the movement status determination device determines that the vehicle is moving in the acceleration area of ​​the merging lane in the merging area.

[0171] In this configuration, the operation of the heart rate monitoring device is prohibited when the vehicle is traveling in the acceleration zone, allowing the occupants to concentrate on driving.

[0172] In the above embodiment, the control device may prohibit the operation of the heart rate induction device when the movement status determination device determines that the vehicle is moving on the main line in the merging area.

[0173] In this configuration, when the vehicle is traveling on the main lane in a merging area, the operation of the heart rate monitoring device is prohibited, allowing the occupants to concentrate on driving.

[0174] In the above embodiment, the control device may prohibit the operation of the heart rate induction device when the movement status determination device determines that the vehicle is moving in the first lane of the main line adjacent to the acceleration area.

[0175] In this configuration, when the vehicle is traveling in the first lane of a merging area, the operation of the heart rate monitoring device is prohibited, allowing the occupants to concentrate on driving.

[0176] In the above embodiment, the control device may prohibit the operation of the heart rate induction device when the movement status determination device determines that the vehicle is moving in the second lane adjacent to the first lane on the opposite side of the main line from the acceleration area.

[0177] In this configuration, when the vehicle is traveling in the second lane of a merging area, the operation of the heart rate monitoring device is prohibited, allowing the occupants to concentrate on driving.

[0178] In the above embodiment, the vehicle may be equipped with a moving object detection device for detecting moving objects around the vehicle, and the control device may enable the operation of the heart rate induction device if the heart rate is higher than a first threshold and the vehicle is moving in a lane other than the lane adjacent to the acceleration area on the main line, and after prohibiting the operation of the heart rate induction device, the moving object detection device detects a moving object.

[0179] According to this embodiment, after the vehicle has passed through the merging area, the heart rate induction device becomes operational and can perform heart rate induction on the occupants.

[0180] In the above embodiment, the vehicle is provided with a moving object detection device for detecting moving objects around the vehicle, and the control device may enable the operation of the heart rate induction device if the heart rate is higher than a first threshold and the movement status determination device determines that the vehicle is moving in a lane other than the lane adjacent to the acceleration area on the main line, and after prohibiting the operation of the heart rate induction device, the moving object detection device does not detect a moving object.

[0181] According to this embodiment, after the vehicle has passed through the merging area, the heart rate induction device becomes operational and can perform heart rate induction on the occupants.

[0182] In the above embodiment, the control device may enable the operation of the heart rate induction device if, after the heart rate is higher than the first threshold and the movement status determination device determines that the vehicle is moving through the merging area and prohibits the operation of the heart rate induction device, the movement status determination device determines that the vehicle has moved a predetermined distance away from the merging area.

[0183] According to this embodiment, after the vehicle has passed through the merging area, the heart rate induction device becomes operational and can perform heart rate induction on the occupants.

[0184] In the above embodiment, the heart rate guidance device may be provided on the vehicle seat. Alternatively, the heart rate guidance device may be a wearable device attached to the seated person.

[0185] (A) Side view showing the interior of a vehicle equipped with a vehicle seat according to the first to fourth embodiments, (B) Enlarged cross-sectional view of the portion enclosed by the dashed line and (C) Enclosed by the dashed line Block diagram of the vehicle system according to the embodiment Flowchart of the seat control process according to the first embodiment Example of a driver database according to the first embodiment Graph showing the change in heart rate (upper row) when a driver gets into the vehicle immediately after exercise, performs driving operations, gets out of the vehicle, and then gets back in, and the time period during which guidance processing is performed in the vehicle seat according to the first embodiment (lower row) Explanatory diagram for explaining the effective seating elapsed time and effective seating time according to the second embodiment Flowchart of the update process according to the second embodiment (A) Graph showing the change in heart rate when a driver gets into the vehicle immediately after exercise, performs driving operations, and then leaves the seat for a short time until the heart rate falls below the upper heart rate limit, and (B) the time period during which heart rate guidance is performed in the seat system (vehicle seat) according to the first embodiment and (C) the second embodiment, respectively Flowchart of the seat control process according to the third embodiment Example of a driver database according to the third embodiment A driver gets into the vehicle immediately after exercise A graph showing the change in heart rate (upper row) when a driver gets out of the vehicle after performing driving operations and then gets back in, and the time period during which guidance processing is performed in the vehicle seat according to the third embodiment (lower row). An explanatory diagram for explaining the effective start elapsed time and effective start time according to the fourth embodiment. A flowchart of the update process according to the fourth embodiment. (A) A graph showing the change in heart rate when a driver gets into the vehicle immediately after exercise, performs driving operations, and stops the vehicle for a short time until the heart rate falls below the upper heart rate limit, and (B) the time period during which heart rate guidance is performed in the seat system (vehicle seat) according to the third embodiment and (C) the fourth embodiment, respectively. A perspective view showing the interior of the vehicle in the fifth to eighth embodiments. A side view showing the interior of the vehicle equipped with a vehicle seat. A block diagram of the vehicle system. An explanatory diagram of a highway merging area. A flowchart of the seat control process. An explanatory diagram of overtaking and passing. A flowchart of the seat control process in the sixth embodiment. An explanatory diagram of an example of a road sign. A flowchart of the seat control process in the seventh embodiment. An explanatory diagram of the movement of the vehicle seat. An explanatory diagram of the rotation of the vehicle seat. A flowchart of the seat control process in the eighth embodiment.

[0186] Hereinafter, embodiments of the vehicle seat, seat system, vehicle seat control method, and vehicle seat control program according to the present invention will be described with reference to the drawings.

[0187] <Seat Systems of the First to Fourth Embodiments> As shown in Figure 1, the seat system 1 is mounted on a vehicle 2 such as an automobile. The seat system 1 constitutes a part of the vehicle system 3 mounted on the vehicle 2.

[0188] The following explanation will use the example of a case where the seat system 1 is installed in an electric vehicle powered by a battery mounted on the vehicle body 4, but the seat system 1 may also be installed in a vehicle powered by an internal combustion engine. Also, for the sake of explanation, the front-rear, left-right, and up-down directions will be defined with respect to the vehicle 2.

[0189] As shown in Figure 1, the vehicle body 4 that constitutes the vehicle 2 is equipped with a vehicle control device 5 that acquires the state of the vehicle 2 and controls the vehicle 2. The vehicle control device 5 may be installed at any location on the vehicle body 4.

[0190] As shown in Figure 2, the vehicle control device 5 is composed of an electronic control unit (ECU) which includes a processor 6 such as a CPU, memory 7 such as non-volatile memory (ROM) and volatile memory (RAM), storage 8, and a communication interface 9 (communication I / F).

[0191] The vehicle control device 5 acquires the on / off state of the vehicle 2's power switch 10 (also called the power switch) and controls the vehicle 2. The on / off state may include READY mode, in which the engine and motor can be driven; accessory mode, in which some electrical components (such as the audio system) can be used; ignition on mode, in which all electrical components can be used; and sleep mode, which is a standby state after the driver has exited the vehicle and locked the doors. Here, READY mode, accessory mode, and ignition on mode are included in the state where the power switch 10 is on, while sleep mode is included in the state where the power switch 10 is off. When the power switch 10 is off, the vehicle control device 5 communicates with the smart key 11 located within the communication range via the communication interface 9 and controls the locking of the doors according to the operation of the smart key 11. When the power switch 10 is on, the vehicle control device 5 controls the drive source (engine, motor, etc.) for driving the vehicle 2, and controls the display 12A of the instrument panel 12, etc.

[0192] Vehicle 2 is equipped with a driver camera 15 for capturing images of the driver (the person seated in the driver's seat 13). The driver camera 15 is located inside the passenger compartment 16 and captures images of the driver's seat 13 from the front. The driver camera 15 is connected to the vehicle control device 5 and outputs the captured images to the vehicle control device 5. Even when the power switch 10 of vehicle 2 is turned off, the driver camera 15 captures images to monitor the interior of the vehicle, and the captured images are output to the vehicle control device 5.

[0193] The vehicle control device 5 uses the images captured by the driver camera 15 to determine whether or not there is a person sitting in the driver's seat 13 using a known method. The vehicle control device 5 also uses the images captured by the driver camera 15 to determine the time when the person sat in the driver's seat 13 (time of sitting start), and to determine the elapsed time from that reference time (hereinafter, sitting elapsed time). In addition, the vehicle control device 5 uses the images captured by the driver camera 15 to obtain information for identifying the person sitting in the driver's seat 13 (driver) (hereinafter, identification information) using a known method. Identification information may include, for example, facial features.

[0194] The vehicle control device 5 transmits to an external device, in response to a request from that external device, information such as whether or not there is a person sitting in the driver's seat 13, the elapsed time of sitting, and information to identify the person sitting in the driver's seat 13 (facial features). In addition, the vehicle control device 5 may also transmit to an external device, in response to a request from that external device, images captured by the driver camera 15.

[0195] As shown in Figures 1(A) and 2, the seat system 1 comprises a wearable terminal 18 worn by the driver and a vehicle seat 20 that constitutes the driver's seat 13.

[0196] Figure 1(A) shows an example in which the wearable device 18 is composed of a smartwatch (wristwatch-type device) worn on the driver's arm. However, the wearable device 18 shown in Figure 1(A) is merely an example, and may be composed of any device worn on the driver (for example, a smart ring worn on the driver's finger, or a seat belt).

[0197] As shown in Figure 2, the wearable terminal 18 includes a processor 21 such as a CPU, memory 22 such as non-volatile memory (ROM) and volatile memory (RAM), storage 23 for storing various types of information, a communication interface 24 (communication I / F), and a heart rate sensor 25. The wearable terminal 18 may also be equipped with a touch panel 26.

[0198] The heart rate sensor 25 is a biosensor that acquires biological information related to the driver's heartbeat, and may be an optical heart rate sensor comprising a light-emitting element that irradiates light toward the driver's skin and a photodiode that detects the intensity of reflected light. The waveform detected by the heart rate sensor 25 indicates the intensity of reflected light detected by the photodiode and reflects the changes in blood flow due to the heartbeat. In addition, the heart rate sensor 25 may be a sensor that uses the Doppler effect with radio waves, or a sensor that uses a piezoelectric element.

[0199] The processor 21 of the wearable device 18 obtains the heart rate by performing a time-series analysis of the waveform acquired by the heart rate sensor 25. The processor 21 may also obtain the heart rate by, for example, acquiring the time interval from one peak to the next in the waveform output from the heart rate sensor 25. The processor 21 of the wearable device 18 transmits the heart rate acquired in real time to an external device via the communication interface 24.

[0200] When a driver is in an unusual state due to tension, excitement, etc., the driver's heart rate changes from their normal heart rate (hereinafter referred to as the standard heart rate). In order to determine the driver's state based on the heart rate, the storage 23 (or memory 22) of the wearable terminal 18 stores (remembers) the lower limit (hereinafter referred to as the lower heart rate limit) and upper limit (hereinafter referred to as the upper heart rate limit) of the heart rate suitable for driving operations.

[0201] The lower heart rate threshold may be set as the heart rate threshold at which the driver's level of alertness is too low, potentially causing delays in driving operations or impaired judgment and cognitive abilities. The upper heart rate threshold may be set as the heart rate threshold at which the driver is too excited, potentially causing delays in driving operations or impaired judgment and cognitive abilities.

[0202] If the wearable device 18 is constantly worn by the driver, the processor 21 may acquire a standard heart rate based on the heart rate acquired by the heart rate sensor 25 and store it in the storage 23. Based on the standard heart rate, the processor 21 may estimate the lower heart rate limit and the upper heart rate limit and record them in the storage 23. Alternatively, the lower heart rate limit and the upper heart rate limit may be set by the processor 21 based on input such as the driver's age, blood pressure, and physique via the touch panel 26 and recorded in the storage 23. In this case, since the lower heart rate limit and the upper heart rate limit are set based on the driver's age, blood pressure, and physique, the lower heart rate limit and the upper heart rate limit can be appropriately set for each driver.

[0203] In addition, the lower and upper heart rate limits may be set based on standard values ​​for a healthy person and stored in the storage 23 at the time of factory shipment or during the installation of various applications. Furthermore, the processor 21 may communicate with various servers, etc., via the communication interface 24 to obtain the lower and upper heart rate limits and record them in the storage 23.

[0204] In this embodiment, the wearable terminal 18 calculates the average value of the wearer's heart rate based on the waveform acquired by the heart rate sensor 25, and sets the calculated average value as the standard heart rate. Subsequently, the wearable terminal 18 sets a value obtained by multiplying the standard heart rate by a constant of 1 or more (for example, 1.1) as the upper limit of the heart rate. Furthermore, the wearable terminal 18 sets a value obtained by multiplying the standard heart rate by a constant of less than 1 (for example, 0.9) as the lower limit of the heart rate.

[0205] In this way, by setting the upper and lower heart rate limits based on the standard heart rate, it becomes possible to set appropriate upper and standard heart rate limits for each wearer of the wearable device 18.

[0206] As shown in Figure 1(A), the vehicle seat 20 comprises a seat body 28, a vibration generating device 29, and a seat control device 27.

[0207] The seat body 28 includes a seat cushion 31 provided on the floor 30 that defines the bottom of the passenger compartment 16, a seat back 32 extending upward from the rear of the seat cushion 31, and a headrest 33 attached to the upper part of the seat back 32.

[0208] The seat cushion 31 supports the driver's buttocks. The seat back 32 is positioned behind the driver and functions as a backrest. The headrest 33 is positioned behind the driver's head. The seat back 32 is rotatably connected to the seat cushion 31 via a reclining device (not shown) and is supported so as to be tiltable relative to the seat cushion 31.

[0209] The seat cushion 31 includes a frame (not shown) that forms the skeleton, a pad 37 supported by the frame, and a surface material 38 that covers the upper surface of the pad 37. The pad 37 is made of a cushioning material such as urethane. The surface material 38 is made of a sheet-like material such as cloth or leather.

[0210] The seat back 32 includes a frame (not shown) that forms the skeleton, a pad 40 supported by the frame, and a surface material 41 that covers the outer surface of the pad 40. The pad 40 is made of a cushioning material such as urethane. The surface material 41 is made of a sheet-like material such as cloth or leather.

[0211] The frame constituting the seat back 32 is rotatably connected at its lower end to the rear of the frame constituting the seat cushion 31, with respect to an axis extending in the left-right direction.

[0212] The seat body 28 may be supported on the floor 30 via a rotating device so as to be rotatable about an axis extending vertically from the floor 30. Alternatively, the seat body 28 may be supported on the floor 30 so as to be movable back and forth via a sliding device (not shown).

[0213] The vibration generating device 29 (also called a vibration device or vibration apparatus) includes one or more vibrators 45 that generate vibrations. In this embodiment, the vibration generating device 29 includes a plurality of vibrators 45 provided on the seat back 32 (hereinafter referred to as back-side vibrators 45A) and a plurality of vibrators 45 provided on the seat cushion 31 (hereinafter referred to as cushion-side vibrators 45B).

[0214] As shown in Figure 1(B), the rear-side transducer 45A is preferably positioned inside a recess 47 formed on the front surface of the pad 40 that constitutes the seat back 32. The rear-side transducer 45A is preferably covered from the front by a surface material 41 that covers the front surface of the pad 40 of the seat back 32. The vibrations output by the rear-side transducer 45A are transmitted to the driver via the pad 40 of the seat back 32 and the surface material 41.

[0215] As shown in Figure 1(C), the cushion-side transducer 45B is preferably positioned inside a recess 47 formed on the upper surface of the pad 37 that constitutes the seat cushion 31. The cushion-side transducer 45B is preferably covered from above by a surface material 38 that covers the upper surface of the pad 37 of the seat cushion 31. The vibrations output by the back-side transducer 45A are transmitted to the driver via the pad 37 of the seat cushion 31 and the surface material 38.

[0216] At least one of the vibrators 45 is configured to independently change the amplitude and frequency of the output vibration in response to the input. Hereinafter, a vibrator 45 whose amplitude and frequency can be independently changed will be referred to as an independently variable vibrator. The independently variable vibrator includes an AC motor, and the amplitude and frequency of the output vibration may be independently changed depending on the amplitude and frequency of the input AC voltage. The AC motor included in the independently variable vibrator may be a known motor such as a linear vibration motor or a piezoelectric vibration motor. In this embodiment, all vibrators 45 included in the vibration generator 29 are composed of independently variable vibrators.

[0217] As shown in Figure 2, the seat control device 27 is composed of an electronic control unit (ECU) including a processor 50, memory 51, storage 52, communication interface 53 (communication I / F), and digital-to-analog converter 54 (DA converter). In this embodiment, as shown in Figure 1(A), the seat control device 27 is coupled to the bottom surface (underside) of the seat cushion 31.

[0218] The processor 50 is composed of a CPU and the like, and performs various processes related to the vehicle seat 20. The memory 51 is composed of non-volatile memory (ROM) and volatile memory (RAM) and the like, and stores and holds various information required for the processes performed by the processor 50.

[0219] The storage 52 stores identification information for identifying the person sitting in the seat body 28, and heart rate information corresponding to each person sitting in the seat, in the driver database. The identification information is information for identifying the driver from the image captured by the driver camera 15, and may consist of, for example, facial features. The heart rate information is information for determining whether the driver is in a stressed state based on their heart rate, and for processing based on the determination result, and is acquired when the driver first sits in the seat body 28 and stored in the storage 52.

[0220] The communication interface 53 mediates communication between the processor 50 and various devices other than the seat control device 27. The communication between the processor 50 and the various devices may be based on either wireless or wired methods.

[0221] Specifically, the communication interface 53 mediates wireless communication between the processor 50 of the seat control device 27 and the wearable terminal 18. As a result, the processor 50 of the seat control device 27 communicates wirelessly with the wearable terminal 18 and obtains information related to the driver's (the person wearing the wearable terminal 18's) heartbeat and the driver's heart rate in real time from the wearable terminal 18.

[0222] The communication interface 53 also mediates communication between the processor 50 of the seat control device 27 and the vehicle control device 5. This allows the processor 50 of the seat control device 27 to communicate with the vehicle control device 5 via the communication interface 53. Communication between the seat control device 27 and the vehicle control device 5 may be based on either wired or wireless methods. The processor 50 of the seat control device 27 communicates with the vehicle control device 5 and can obtain the determination result of whether or not there is a person sitting in the seat body 28, and the elapsed time of sitting, which has been acquired by the vehicle control device 5. In addition, the processor 50 of the seat control device 27 can obtain identification information (in this embodiment, facial features) for identifying the person sitting in the seat body 28, and images captured by the driver camera 15 from the vehicle control device 5.

[0223] The digital-to-analog converter 54 converts the digital signal output from the processor 50 of the seat control device 27 into an analog voltage and outputs the analog voltage to an output terminal (not shown). The seat control device 27 is provided with a digital-to-analog converter 54 corresponding to each vibrator 45, and the output terminal of the digital-to-analog converter 54 is connected to the corresponding vibrator 45 via a harness 60.

[0224] As shown in Figures 1(B) and 1(C), the pad 37 of the seat cushion 31 and the pad 40 of the seat back 32 are each provided with a harness passage 62 for passing a harness 60 that connects the digital-to-analog converter 54 and the transducer 45. In the pad 37 of the seat cushion 31, the harness passage 62 reaches a recess 47 from its lower surface, and in the pad 40 of the seat back 32, the harness passage 62 reaches a recess 47 from its rear surface.

[0225] Each of the vibrators 45 is connected to the seat control device 27 (specifically, the output terminal of the corresponding digital-to-analog converter 54) by a harness 60 that passes through a harness passage 62. The processor 50 of the seat control device 27 controls the analog voltage output from the digital-to-analog converter 54 by outputting a digital signal to the digital-to-analog converter 54, thereby controlling the amplitude and frequency of vibrations output from each of the vibrators 45. In other words, the seat control device 27 can independently control the amplitude and frequency of vibrations output from the vibrators 45.

[0226] The processor 50 of the seat control device 27 executes a control program stored in the memory 51 and storage 52 to acquire information related to the driver's heart rate from the wearable terminal 18, and, if necessary, executes control processing (hereinafter referred to as seat control processing) for the vehicle seat 20 to control the vibration generator 29 in order to perform heart rate guidance, thereby implementing the control method for the vehicle seat 20.

[0227] Heart rate guidance refers to monitoring the driver's heart rate and providing feedback to the driver in order to alleviate stress (so-called heart rate-based biofeedback), and the feedback to the driver is provided by vibrations generated by the vibration generator 29.

[0228] Next, two embodiments of the seat control processing performed by the seat control device 27 will be described.

[0229] <<First Embodiment>> Figure 3 shows a flowchart of the seat control process executed by the seat control device 27 of the seat system 1 according to the first embodiment. The seat control device 27 (processor 50) executes the seat control process at predetermined intervals (hereinafter referred to as repetition time).

[0230] In the first step ST1 of the seat control process, the processor 50 of the seat control device 27 obtains a determination result from the vehicle control device 5 regarding the presence or absence of a seated person based on the image captured by the current driver camera 15, via communication through the communication interface 53.

[0231] The processor 50 of the seat control device 27 terminates the seat control process if the vehicle control device 5 determines that there is no seated person. If it determines that there is a seated person, the processor 50 of the seat control device 27 executes step ST2.

[0232] In step ST2, the processor 50 of the seat control device 27 acquires identification information (facial features) from the vehicle control device 5 to identify the person sitting in the seat body 28. Next, the processor 50 of the seat control device 27 determines whether the person corresponding to the acquired facial features is recorded in the driver database.

[0233] Figure 4 shows an example of a driver database according to the first embodiment. As shown in Figure 4, the driver database according to the first embodiment stores facial features as specific information, and stores the driver's standard heart rate, lower heart rate limit, upper heart rate limit, and prohibited time τ corresponding to the facial features as heart rate information. Note that prohibited time τ means the time during which heart rate induction is prohibited.

[0234] The processor 50 of the seat control device 27 executes step ST3 if a person corresponding to the facial features acquired from the captured image is recorded in the driver database, and steps ST4 if the person is not recorded.

[0235] In step ST3, the processor 50 of the seat control device 27 uses the driver database to acquire heart rate information (standard heart rate, upper heart rate limit, lower heart rate limit, and forbidden time τ) corresponding to specific information (face features) acquired from the vehicle control device 5. Once the acquisition of heart rate information is complete, the processor 50 of the seat control device 27 executes step ST5.

[0236] In step ST4, the processor 50 of the seat control device 27 acquires the standard heart rate, lower heart rate limit, and upper heart rate limit from the driver's wearable terminal 18, associates them with facial features acquired from the captured image, and records them in the driver database.

[0237] At this time, the processor 50 of the seat control device 27 records the standard heart rate, the upper heart rate limit, and the lower heart rate limit, along with the prohibited time τ, in the driver database.

[0238] The processor 50 of the seat control device 27 may determine the prohibition time τ by a constant that does not depend on the standard heart rate (for example, 5 minutes), or the processor 50 of the seat control device 27 may obtain the prohibition time τ based on one of the standard heart rate, the upper heart rate limit, or the lower heart rate limit. The processor 50 of the seat control device 27 may set the prohibition time τ to be longer the higher the standard heart rate.

[0239] In this case, the processor 50 of the seat control device 27 may acquire only the standard heart rate from the wearable terminal 18 and set the upper and lower heart rate limits based on the standard heart rate. Specifically, the processor 50 of the seat control device 27 may set the upper heart rate limit by adding a predetermined value to the standard heart rate and set the lower heart rate limit by subtracting a predetermined value from the standard heart rate. This eliminates the need to record the upper and lower heart rate limits in the driver database, thereby reducing the amount of data in the driver database and making it possible to set appropriate upper and lower heart rate limits for each driver using a simple method.

[0240] When the processor 50 of the seat control device 27 has finished recording to the driver database, it executes step ST5.

[0241] In step ST5, the processor 50 of the seat control device 27 obtains from the vehicle control device 5 the elapsed time since the occupant sat on the seat body 28, i.e., the seating elapsed time. The seat control device 27 then determines whether the seating elapsed time is longer than the prohibited time τ (i.e., whether the prohibited time τ has elapsed since the occupant sat on the seat body 28). If the seating elapsed time is longer than the prohibited time τ, step ST5 is executed. If the seating elapsed time is less than or equal to the prohibited time τ, or if the seating elapsed time could not be obtained, the seat control process is terminated.

[0242] In step ST6, the processor 50 of the seat control device 27 obtains the driver's heart rate from the wearable terminal 18 and determines whether it is below the upper limit of the heart rate of the person corresponding to the facial features obtained from the captured image. If the obtained heart rate is below the corresponding upper limit of the heart rate, the processor 50 of the seat control device 27 executes step ST6. If the obtained heart rate is greater than the corresponding upper limit of the heart rate, it executes step ST7.

[0243] In step ST7, the processor 50 of the seat control device 27 determines whether the heart rate acquired in step ST5 is equal to or greater than the lower limit of the person's heart rate corresponding to the facial features acquired from the captured image. If the acquired heart rate is equal to or greater than the corresponding upper limit of the heart rate, the processor 50 of the seat control device 27 completes the seat control processing. If the acquired heart rate is less than the corresponding upper limit of the heart rate, step ST8 is executed.

[0244] In step ST8, the processor 50 of the seat control device 27 performs induction processing over a repeating time to perform heart rate induction. Specifically, in the induction processing, the processor 50 of the seat control device 27 obtains the driver's heart rate from the wearable terminal 18 and sets the frequency of vibrations generated by the vibration generator 29 based on the driver's heart rate in order to bring the obtained driver's heart rate closer to the standard heart rate.

[0245] The processor 50 of the seat control device 27 may, in the induction process, set the frequency of vibrations generated by the vibration generator 29 to be between the driver's heart rate and the standard heart rate. For example, if the driver's heart rate is higher than the standard heart rate (shorter period), the processor 50 of the seat control device 27 may set the period of vibrations generated by the vibration generator 29 to be higher than the standard heart rate but slightly lower than the driver's heart rate. By setting the frequency of vibrations generated by the vibration generator 29 to be between the driver's heart rate and the standard heart rate in this way, the driver's heart rate can be appropriately guided to asymptotically approach the standard heart rate.

[0246] Furthermore, the processor 50 of the seat control device 27 may set the amplitude of the vibrations generated by the vibration generator 29 to a constant value during induction processing, or it may be set to depend on the elapsed time of sitting. In addition, the processor 50 of the seat control device 27 may set the amplitude of the vibrations generated by the vibration generator 29 to depend on the position of the vibrator 45. For example, the processor 50 of the seat control device 27 may set the amplitude of the vibrations generated by vibrators 45 closer to the driver's head to be larger, and the amplitude of vibrations generated by vibrators 45 closer to the driver's heart to be smaller.

[0247] When the processor 50 of the seat control device 27 has performed induction processing over the repetition time, it temporarily ends the seat control processing and immediately starts the seat control processing again from the first step (ST1).

[0248] Next, the operation and effects of the vehicle seat 20 (seat system 1) configured in this way will be explained with reference to Figure 5.

[0249] The upper part of Figure 5 shows a graph illustrating the time-dependent change in the driver's heart rate when the driver gets into vehicle 2 at time t=t1 immediately after exercise, drives vehicle 2 for a while, gets out of vehicle 2 at time t=t2 to do some shopping, etc., and then gets back into vehicle 2 at time t=t3 and drives vehicle 2 again.

[0250] In the example shown in the upper part of Figure 5, the driver's heart rate exceeds the upper limit at time t1, but decreases over time and falls below the upper limit at time t4. However, the time from time t1 to t4 is longer than the prohibited time τ.

[0251] Furthermore, when the driver boards the vehicle at time t3, their heart rate is higher than at time t2 and exceeds the upper limit of the heart rate. After time t3, the heart rate decreases and falls below the upper limit at time t5. However, the heart rate at time t3 is lower than at time t1, and the time from time t3 to t5 is shorter than the prohibited time τ. Note that in the example shown in the upper part of Figure 5, the heart rate is always above the lower limit of the heart rate.

[0252] The lower part of Figure 5 shows the time period during which heart rate guidance is performed (heart rate guidance is turned ON) when the heart rate changes, as shown in the upper part.

[0253] Before time t1, the driver is not seated in the seat body 28 (No in ST1), so the guidance process is not performed.

[0254] During the time period from t1 to t1+τ, it is determined that the driver is seated in the seat body 28 (Yes in ST1), and after the upper limit of the heart rate etc. is obtained (ST2 to ST4), it is determined that the elapsed time since the driver sat in the seat body 28, i.e., the seated time, is less than or equal to the prohibited time τ (No in ST5). Therefore, no guidance processing is performed during the time period from t1 to t1+τ.

[0255] During the time period from t1+τ to t4, it is determined that the driver is seated in the seat body 28 (Yes in ST1), and after the heart rate upper limit and other values ​​are obtained (ST2 to ST4), it is determined that the seating time is longer than the prohibited time τ (Yes in ST5), and it is determined that the heart rate is higher than the heart rate upper limit (No in ST6). Therefore, guidance processing is performed during the time period from t1+τ to t4.

[0256] During the time period from t4 to t2, it is determined that the driver is seated in the seat body 28 (Yes in ST1), and after the upper limit of the heart rate etc. is obtained (ST2 to ST4), it is determined that the seating time is longer than the prohibited time τ (Yes in ST5), and the heart rate is below the upper limit of the heart rate (Yes in ST6) and above the lower limit of the heart rate (Yes in ST7). Therefore, no guidance process is performed.

[0257] Between times t2 and t3, the driver has disembarked and is not seated in the seat body 28 (No. in ST1), therefore no guidance process is performed.

[0258] During the time period from t3 to t3+τ, it is determined that the driver is seated in the seat body 28 (Yes in ST1), and after the upper limit of the heart rate etc. is obtained (ST2 to ST4), it is determined that the seating time is less than or equal to the prohibited time τ (No in ST5). Therefore, no guidance processing is performed during the time period from t3 to t3+τ.

[0259] During the time period from time t3+τ onward, it is determined that the driver is seated in the seat body 28 (Yes in ST1), and after the upper limit of the heart rate etc. is obtained (ST2-ST4), it is determined that the seating time is longer than the prohibited time τ (Yes in ST5), and the heart rate is below the upper limit of the heart rate (Yes in ST6) and above the lower limit of the heart rate (Yes in ST7). Therefore, no guidance processing is performed during the time period from time t3+τ onward.

[0260] As shown in the lower part of Figure 5 (in particular, refer to the time intervals t1 to t1+τ and t3 to t3+τ), the induction process is prohibited when the seated time is less than the prohibited time τ. Therefore, for example, if the driver gets into the vehicle immediately after exercise, or if the heart rate is outside the predetermined range (heart rate range) due to factors other than stress (either higher than the upper heart rate limit or lower than the lower heart rate limit), the induction process is prevented from being executed immediately. Thus, a vehicle seat 20, a seat system 1, a control method for the vehicle seat 20, and a control program can be provided that enable heart rate induction for the driver at a timing that provides stress relief.

[0261] During the guidance process, vibrations are generated from the vibration generator 29 so that the driver's heart rate asymptotically approaches the standard heart rate. The seat control device 27 stores identification information for identifying the person sitting in the seat body 28 and the standard heart rate of the person corresponding to the identification information in a driver database, and sets the standard heart rate based on the identification information (facial features) of the seated person (driver) acquired by the vehicle control device 5. Therefore, a standard heart rate suitable for each driver can be set.

[0262] The seat control device 27 stores the upper and lower heart rate limits and the prohibited time τ for a person corresponding to specific information in the driver database, and sets the upper and lower heart rate limits and the prohibited time τ based on the specific information (facial features) of the seated person (driver) acquired by the vehicle control device 5. Therefore, the upper and lower heart rate limits and the prohibited time τ can be set to suit each driver.

[0263] In the example shown in Figure 5, the heart rate exceeds the upper limit of the heart rate. However, as shown in Figure 3, the induction process is also performed when the driver is seated on the seat body 28 (Yes at ST1), the seating time is longer than or equal to the prohibited time τ (Yes at ST5), and the driver's heart rate is below the lower limit of the heart rate (Yes at ST6, No at ST7). In other words, heart rate induction is performed when the seating time is longer than or equal to the prohibited time τ, and the driver's heart rate is determined to be outside a predetermined range (heart rate range) (either higher than the upper limit of the heart rate or lower than the lower limit of the heart rate). Therefore, if the driver's heart rate is too high or too low, heart rate induction can be performed to asymptotically bring the driver's heart rate closer to the standard heart rate.

[0264] Furthermore, the seat control device 27 may be configured to set a new prohibition time τ when it is determined that a seat is occupied during the seat control processing that is executed after it has been determined that no one is occupied. Specifically, when the processor 50 of the seat control device 27 determines that a seat is occupied in step ST1 of the seat control processing that is executed after it has been determined that no one is occupied, it obtains the heart rate (i.e., the heart rate at the moment of sitting) and the standard heart rate from the wearable terminal 18. Subsequently, the processor 50 of the seat control device 27 may set the prohibition time τ in step ST3 or ST4 based on the heart rate at the moment of sitting and the standard heart rate.

[0265] The processor 50 of the seat control device 27 may be set such that, for example, the forbidden time τ increases as the difference between the heart rate at the moment of sitting and the standard heart rate increases. This ensures that the forbidden time τ increases as the driver's heart rate deviates from the standard heart rate, so that the forbidden time τ can be set appropriately even if the driver gets into the vehicle after strenuous exercise.

[0266] <<Second Embodiment>> In the seat system 1 according to the first embodiment, the seat control device 27 was configured to compare the elapsed seating time and the prohibited time τ in step ST5 of the seat control processing. In the seat system 1 according to the second embodiment, the seat control device 27 is configured to compare the effective elapsed seating time and the prohibited time τ in step ST5 of the seat control processing, except that it is the same as the first embodiment. Therefore, the other configurations will not be described.

[0267] The effective seating time referred to here means the seating time calculated by excluding the time period during which the driver was not confirmed to be seated (hereinafter referred to as the "absence time"), taking into account the effects of malfunctions in imaging by the driver camera 15, errors in person detection, short periods of leaving the seat, etc., when that time period is below a predetermined threshold. As shown in Figure 6, the seating time is calculated by setting the most recent seating time (the time the person sat down) after excluding the absence time below the threshold as the effective seating time (also called the reference time), and calculating the time difference from that effective seating time to the current time. The effective seating time is calculated by the vehicle control device 5 and transmitted to the seat control device 27.

[0268] As shown in Figure 6, the vehicle control device 5 updates the effective seating time when the driver camera 15 newly confirms that a driver is seated. Figure 7 shows a flowchart of the update process. The vehicle control device 5 is assumed to store the time when the previous seating was no longer confirmed (i.e., the time when the previous driver left the seat) as the previous departure time. Furthermore, the vehicle control device 5 is assumed to have the shipment time set as the initial value for the effective seating time and the previous departure time, respectively, at the time of vehicle shipment, and the driver is assumed to be seated after a sufficient amount of time has elapsed since the vehicle was shipped.

[0269] First, in the first step ST11 of the update process, the vehicle control device 5 determines whether the time difference between the time immediately before leaving the seat and the time when the seat was newly confirmed to be occupied (i.e., the current time when ST11 is executed) is less than or equal to a threshold. If it is less than or equal to the threshold, the vehicle control device 5 maintains the effective seated time without updating it and finishes the update process. If the time difference between the time immediately before leaving the seat and the time when the seat was newly confirmed to be occupied is greater than the threshold, the vehicle control device 5 updates the effective seated time to the time when the seat was newly confirmed and finishes the update process.

[0270] The seat control device 27 may set the effective seating time and obtain the effective seating elapsed time based on the determination result of whether or not a seat is occupied by the vehicle control device 5, or the seat control device 27 may set the effective seating time and obtain the effective seating elapsed time by obtaining the image capture result from the driver camera 15. In the latter case, the update process is preferably performed by the seat control device 27.

[0271] The operation and effects of the vehicle seat 20 (seat system 1) when configured in this way will now be explained. Figure 8(A) shows the change in the driver's heart rate between t1 and t4 in the example shown in Figure 5. Here, it is assumed that the driver was mistakenly determined to have left the seat between t5 and t6 between t1 and t4 due to a malfunction in the driver camera 15. The time interval between t5 and t6 is assumed to be below a threshold.

[0272] Figure 8(B) shows the timing at which heart rate induction is turned on and off in the seat system 1 in the first embodiment. In the seat system 1 according to the first embodiment, as shown in Figure 8(B), the vehicle control device 5 assumes that a new seat has been taken at time t6 and sets a forbidden time τ from time t6.

[0273] Figure 8(C) shows the timing at which heart rate guidance is turned on and off in the seat system 1 in the second embodiment. As shown in Figure 8(C), in the seat system 1 according to the second embodiment, even if there is a period of time when seating cannot be confirmed for a short time due to a malfunction in the driver camera 15, the prohibited time τ is set based on the elapsed time from time t1. Therefore, it is possible to set a more appropriate time period for implementing heart rate guidance based on the time when the driver actually started to sit down (effective seating time).

[0274] <<Third Embodiment>> Figure 9 shows a flowchart of the seat control process performed by the seat control device 27 of the seat system 1 according to the third embodiment. Figure 10 shows an example of a driver database stored in the storage 52 of the seat control device 27 of the seat system 1 according to the third embodiment.

[0275] As shown in Figure 9, the vehicle seat 20 according to the third embodiment differs in step ST5 of the seat control device 27. Also, as shown in Figure 10, the content of the heart rate information differs in the third embodiment compared to the first embodiment.

[0276] Furthermore, the vehicle control device 5 according to the third embodiment can transmit the power status of the vehicle 2 (also referred to as the on / off state of the vehicle 2, the startup state, or the on / off state of the power switch 10) to an external device (here, the seat control device 27) in response to a request from the external device. In addition, when the vehicle 2 is started, the vehicle control device 5 according to the third embodiment stores the time when the vehicle 2 (power switch 10) was turned on as the startup time (reference time). When the power switch 10 is on, the vehicle control device 5 according to the third embodiment can transmit the elapsed time from the startup time to the external device as the startup elapsed time. The startup elapsed time corresponds to the elapsed time from the most recent time when the vehicle 2 was turned on. If the vehicle 2 is powered by an internal combustion engine, the vehicle control device 5 should transmit the elapsed time from when the ignition switch of the vehicle 2 was turned on to the external device.

[0277] As shown in Figure 9, the seat control device 27 according to the third embodiment, similar to the first embodiment, obtains a determination result from the vehicle control device 5 regarding whether or not the seat body 28 is occupied in the first step ST1 of the seat control process. If it is determined that the seat is not occupied (No in ST1), the seat control process is terminated. If it is determined that the seat is occupied (Yes in ST1), the seat control device 27 obtains the occupant's identification information (facial features) from the vehicle control device 5 and determines whether it is recorded in the driver database. If it is recorded (Yes in ST2), the seat control device 27 obtains heart rate information that matches the occupant's identification information.

[0278] The heart rate information according to the third embodiment includes, in addition to the standard heart rate, upper heart rate limit, and lower heart rate limit, similar to those in the first embodiment, an execution time δ. The execution time δ represents the time window during which the induction process can be executed, starting from the activation time (reference time).

[0279] If the data is not recorded (No in ST2), the seat control device 27 acquires the standard heart rate, upper heart rate limit, and lower heart rate limit from the wearable terminal 18, similar to the first embodiment. The seat control device 27 then sets the execution time δ based on at least one of the standard heart rate, upper heart rate limit, and lower heart rate limit. The seat control device 27 may set the execution time δ to increase as the standard heart rate increases, for example. Once the acquisition of the standard heart rate, upper heart rate limit, lower heart rate limit, and execution time δ is complete, the seat control device 27 records them in the driver database in association with specific information (facial features) acquired from the vehicle control device 5.

[0280] Once the acquisition of the standard heart rate, upper heart rate limit, lower heart rate limit, and execution time δ is complete (ST3, 4), the seat control device 27 acquires the startup status and startup elapsed time of the vehicle 2 from the vehicle control device 5 and determines whether the vehicle 2 is running and whether the startup elapsed time is less than the execution time δ (ST5).

[0281] If vehicle 2 is not started, or if the time elapsed since starting is equal to or greater than the execution time δ (No in ST5), the seat control device 27 terminates the seat control process.

[0282] If vehicle 2 is running and the execution time is less than δ (Yes in ST5), the seat control device 27 obtains the driver's heart rate from the wearable terminal 18 and determines whether the obtained heart rate is less than or equal to the upper heart rate limit (ST6). If the heart rate is greater than the upper heart rate limit (No in ST6), the seat control device 27 performs guidance processing (ST8). If the heart rate is less than or equal to the upper heart rate limit (Yes in ST6), the seat control device 27 determines whether the heart rate is greater than or equal to the lower heart rate limit (ST7). If the heart rate is greater than or equal to the lower heart rate limit (Yes in ST7), the seat control processing is completed. If the heart rate is less than the lower heart rate limit (No in ST7), guidance processing is performed in the same manner as in the first embodiment (ST8).

[0283] Next, the operation and effects of the vehicle seat 20 (seat system 1) configured in this way will be explained. The upper part of Figure 11 shows an example of heart rate conversion when a driver who has just exercised gets in the vehicle at time t=t1 and gets out at time t=t2. The lower part of Figure 11 shows the time period during which the induction process is executed (turned on) by graph. In the upper and lower parts of Figure 11, it is assumed that the power switch 10 is turned on at time t0. Also, at the vehicle startup time t=t0, the driver's heart rate is assumed to be higher than the upper heart rate limit, and after the execution time δ has elapsed, it falls below the upper heart rate limit.

[0284] As shown in the lower part of Figure 11, if the heart rate is higher than the upper heart rate limit during the execution time δ after the power switch 10 is turned on, the induction process is executed. This ensures that the induction process is executed after the driver gets into the vehicle 2 with an excessively high heart rate, until the heart rate stabilizes and becomes suitable for driving. Therefore, it is possible to provide a vehicle seat 20, a seat system 1, a control method for the vehicle seat 20, and a control program that can provide heart rate guidance to the driver at a timing that provides stress reduction benefits.

[0285] Furthermore, even if the heart rate is lower than the lower limit of the heart rate during the execution time δ after the power switch 10 is turned on, the induction process is performed in the same manner. This ensures that the induction process is performed after the driver gets into the vehicle with a very low heart rate, until the heart rate stabilizes and becomes suitable for driving. Therefore, even when the heart rate is very low, a vehicle seat 20 can be provided that provides heart rate guidance to the driver at a timing that provides a stress-relieving effect.

[0286] The seat control device 27 stores the upper and lower heart rate limits and execution time δ for a person corresponding to specific information in the driver database, and sets the standard heart rate, upper and lower heart rate limits and execution time δ based on the specific information (facial features) of the seated person (driver) acquired by the vehicle control device 5. Therefore, similar to the first embodiment, the standard heart rate, upper and lower heart rate limits and execution time δ can be set to suit each driver.

[0287] In addition, similar to the first embodiment, the seat control device 27 may, based on the driver's identification information, refer to the driver database to obtain the corresponding standard heart rate, and set the upper and lower heart rate limits based on that standard heart rate.

[0288] <<Fourth Embodiment>> In the seat system 1 according to the third embodiment, the seat control device 27 was configured to compare the startup elapsed time and the execution time δ in step ST5 of the seat control processing. In the seat system 1 according to the fourth embodiment, the seat control device 27 is configured to compare the effective startup elapsed time and the execution time δ in step ST5 of the seat control processing, except that it is the same as the third embodiment. The other configurations will not be described.

[0289] The effective startup time referred to here means the startup time calculated excluding the time when the vehicle 2's power is off (hereinafter referred to as the off-time period), taking into account short stops, etc., if that off-time period is below a predetermined threshold. As shown in Figure 12, the effective startup time is calculated using the most recent startup time (reference time), excluding the off-time period below the threshold, as the effective startup time, and corresponds to the elapsed time from that effective startup time to the current time. The effective startup time is calculated by the vehicle control device 5 and transmitted to the seat control device 27.

[0290] As shown in Figure 12, when vehicle 2 is switched from off to on (also referred to as when vehicle 2 is started or when the power switch 10 is turned on), the vehicle control device 5 performs an update process to update the effective start time. Figure 13 shows a flowchart of the update process. The vehicle control device 5 is assumed to store the time when vehicle 2 was most recently switched from on to off (i.e., the time when vehicle 2 was stopped, also referred to as the time when the power switch 10 was turned off) as the previous off time. Furthermore, the vehicle control device 5 is assumed to set the shipment time as the initial value for the effective start time and the previous off time when vehicle 2 is shipped, and to start vehicle 2 after a sufficient amount of time has elapsed after vehicle 2 has been shipped.

[0291] First, in the first step ST21 of the update process, the vehicle control device 5 obtains the time difference between the immediately preceding off time and the time when the vehicle 2 was newly started (i.e., the current time when ST21 is executed). If the obtained time difference is less than or equal to the threshold, the vehicle control device 5 maintains the effective start time without updating it and finishes the update process. If the time difference between the immediately preceding off time and the time when the vehicle 2 was newly started is greater than the threshold, the vehicle control device 5 updates the effective start time to the time when the vehicle 2 was newly started (i.e., the current time when ST21 is executed) and finishes the update process.

[0292] The vehicle control device 5 may be configured to transmit the power status of the vehicle 2 to the seat control device 27, and the seat control device 27 may set the effective startup time and obtain the effective startup elapsed time based on the power status obtained from the vehicle control device 5. Alternatively, the seat control device 27 may obtain the power status of the vehicle 2, set the effective startup time, and obtain the effective startup elapsed time. In this case, the update process may be performed by the seat control device 27.

[0293] The operation and effects of the vehicle seat 20 (seat system 1) when configured in this way will now be explained. Figure 14(A), similar to the upper part of Figure 11, shows an example of heart rate changes when the driver's heart rate falls below the upper heart rate limit after the vehicle 2 has started and an execution time δ has elapsed. Here, it is assumed that after the vehicle 2 has started but before the execution time δ has elapsed, the driver stops the vehicle 2 at times t10 to t11, for example, to stop at a convenience store. Also, it is assumed that the time interval (t11-t10) of the time when the driver stopped the vehicle 2 (off-time) is smaller than the threshold.

[0294] Figure 14(B) shows the timing of when heart rate guidance is turned on and off in the seat system 1 according to the third embodiment. As shown in Figure 14(B), heart rate guidance is performed from time t=t11 until execution time δ has elapsed. In the seat system 1 according to the third embodiment, although the setting of the effective start time is simple and easy, heart rate guidance is also performed after execution time δ has elapsed from the time t=t0 when the vehicle 2 is effectively started.

[0295] Figure 14(C) shows the timing of when heart rate guidance is turned on and off in the seat system 1 according to the fourth embodiment. As shown in Figure 14(C), since the time interval from time t10 to t11 is smaller than the threshold, the effective activation time is set to time t0 at time t=t11. Therefore, in the seat system 1 according to the fourth embodiment, even if the seated person briefly stops the vehicle 2, the time period during which heart rate guidance is performed can be limited from the time when the vehicle 2 is effectively started (effective activation time) to the execution time δ. Thus, even if the vehicle 2 is briefly stopped, the time period for performing heart rate guidance can be set more appropriately based on the time when the driver is expected to have effectively started driving operations.

[0296] <<Fifth Embodiment>>

[0297] Figure 15 schematically shows the interior of the vehicle (passenger car) in the fifth to eighth embodiments. In the vehicle, the floor 101 forms the floor surface of the vehicle. A pair of front seats 102 are arranged left and right in the front of the passenger compartment as the first row of passenger seats. In this embodiment, the right front seat 102 is the driver's seat. A pair of mid seats 103 are arranged left and right in the center of the passenger compartment as the second row of passenger seats. The rear seat 104 extends left and right in the rear of the passenger compartment as the third row of passenger seats.

[0298] Each front seat 102 includes a seat cushion 102A, a seat back 102B, and a headrest 102C. The seat cushion 102A is provided on the floor 101. The seat back 102B is provided behind the seat cushion 102A. The headrest 102C is provided on top of the seat back 102B.

[0299] Each mid-seat 103 comprises a seat cushion 103A, a seat back 103B, and a headrest 103C. The seat cushion 103A is provided on the floor 101. The seat back 103B is provided behind the seat cushion 103A. The headrest 103C is provided on top of the seat back 103B.

[0300] The rear seat 104 comprises a pair of seat cushions 104A, a pair of seat backs 104B, and a pair of headrests 104C. The pair of seat cushions 104A are each provided on the floor 101. The pair of seat backs 104B are each provided behind the pair of seat cushions 104A. The pair of headrests 104C are each provided on the top of the pair of seat backs 104B.

[0301] The front door 105 is provided on the outside of the front seat 102 so as to be able to be opened and closed. The rear door 106 is provided on the outside of the mid seat 103 so as to be able to be opened and closed.

[0302] The front door trim 107 is provided on the interior side of the front door 105. The rear door trim 108 is provided on the interior side of the rear door 106. The rear side trim 109 is provided on the exterior wall of the rear seat 104.

[0303] The instrument panel 110 is located in front of the front seats 102. The display device 111 is located in the center of the instrument panel 110 in the left-right direction. For example, the display device 111 is a liquid crystal display. The display device 111 has the function of displaying information such as images.

[0304] Multiple audio output devices 112 are installed inside the vehicle. Each audio output device 112 is installed corresponding to each front seat 102, each mid-seat 103, and each rear seat 104. In Figure 15, the audio output devices 112 corresponding to the right front seat 102, the right mid-seat 103, and the right rear seat 104 are shown. The audio output devices 112 have the function of outputting information by voice to the occupant seated in the corresponding seat.

[0305] Multiple camera devices 113 are installed inside the vehicle. The multiple camera devices 113 are installed corresponding to each front seat 102, each mid seat 103, and each rear seat 104. In Figure 15, only the camera device 113 corresponding to the right front seat 102 is shown. The camera device 113 is installed in front of the right front seat 102. The camera device 113 is installed to the right of the instrument panel 110. The multiple camera devices 113 have the function of photographing the faces, etc., of occupants sitting in the corresponding seats.

[0306] Multiple voice input devices 114 are installed inside the vehicle. The multiple voice input devices 114 are installed corresponding to each front seat 102, each mid seat 103, and each rear seat 104. In Figure 15, only the voice input device 114 corresponding to the right front seat 102 is shown. The voice input device 114 is installed on the right side of the instrument panel 110, next to the camera 113. The voice input device 114 is installed on the right side of the instrument panel 110. The multiple voice input devices 114 have the function of receiving voice input from a sitter seated in the corresponding seat.

[0307] For example, the location information acquisition device 115 is housed behind the display device 111 in the instrument panel 110. For example, the location information acquisition device 115 is a navigation device. The location information acquisition device 115 has the function of receiving radio signals from artificial satellites to acquire vehicle location information. As a movement status determination device, the location information acquisition device 115 has the function of determining the vehicle's position on a map based on pre-stored map information and vehicle location information.

[0308] At least one moving object detection device 116 is installed inside or outside the vehicle. For example, the moving object detection device 116 is a camera, sensor, etc. In Figure 15, only the moving object detection device 116 that detects moving objects in front is shown. For example, the moving object detection device 116 is installed in the upper and central part of the windshield. The moving object detection device 116 has the function of detecting moving objects around the vehicle.

[0309] For example, the vehicle control device 117 is housed below the floor 101. The vehicle control device 117 has the function of controlling the vehicle as a whole. For example, the vehicle control device 117 has the function of controlling the display device 111 and multiple audio output devices 112 based on information from the position information acquisition device 115, multiple imaging devices 113, multiple audio input devices 114, and moving object detection device 116.

[0310] In Figure 16(A), the seat cushion 102A of the front seat 102 includes a frame (not shown), a pad 151 (see Figure 16(B)), and a surface material 152 (see Figure 16(B)). The frame forms the skeleton. The pad 151 is made of a cushioning material such as urethane. The pad 151 is supported by the frame. The surface material 152 is made of a sheet-like material such as cloth or leather. The surface material 152 covers the upper surface of the pad 151.

[0311] The seat back 102B includes a frame (not shown), a pad 153 (see Figure 16(C)), and a surface material 154 (see Figure 16(C)). The frame forms the skeleton. The pad 153 is made of a cushioning material such as urethane. The pad 153 is supported by the frame. The surface material 154 is made of a sheet-like material such as cloth or leather. The surface material 154 covers the upper surface of the pad 153.

[0312] The rotating mechanism 161 is provided between the floor 101 and the front seat 102. The rotating mechanism 161 is a mechanism that rotates the front seat 102 around an axis that extends vertically relative to the floor 101. The rotary drive device 162 is provided in the vicinity of the rotating mechanism 161. The rotary drive device 162 has the function of driving the rotating mechanism 161.

[0313] The sliding mechanism 163 is provided between the floor 101 and the front seat 102. The sliding mechanism 163 is a mechanism that moves the front seat 102 in parallel in the front-rear direction relative to the floor 101. The sliding drive device 164 is provided in the vicinity of the sliding mechanism 163. The sliding drive device 164 has the function of driving the sliding mechanism 163.

[0314] The reclining mechanism 165 is provided between the seat cushion 102A and the seat back 102B. The reclining mechanism 165 is a mechanism that rotates the seat back 102B about an axis that extends horizontally from the rear end of the seat cushion 102A. The reclining drive device 166 is provided in the vicinity of the reclining mechanism 165. The reclining drive device 166 has the function of driving the reclining mechanism 165.

[0315] The seating sensor 171 comprises a first detection unit 171A (see Figure 16(B)) and a second detection unit 171B (see Figure 16(C)). The first detection unit 171A and the second detection unit 171B are formed in a sheet shape. The first detection unit 171A is provided between the pad 151 and the surface material 152. The second detection unit 171B is provided between the pad 153 and the surface material 154. The first detection unit 171A and the second detection unit 171B each have the function of acquiring the pressure distribution applied to them. The seating sensor 157 has the function of detecting the area of ​​the region where a pressure of a preset threshold or higher is detected, based on the pressure distribution detected in at least one of the first detection unit 171A and the second detection unit 171B, as the seating area of ​​the occupant.

[0316] The vibration device 181 includes at least one vibrator 182. In this embodiment, the vibration device 181 includes a plurality of cushion-side vibrators 182A and a plurality of back-side vibrators 182B.

[0317] As shown in Figure 16(B), in the seat cushion 102A, the cushion-side vibrator 182A is positioned inside a recess 151A formed on the upper surface of the pad 151. The cushion-side vibrator 182A is covered from above by the surface material 152. The cushion-side vibrator 182A has the function of transmitting the output vibrations to the driver via the pad 151 and the surface material 152.

[0318] As shown in Figure 16(C), in the seat back 102B, the back-side transducer 182B is positioned inside a recess 153A formed on the front surface of the pad 153. The back-side transducer 182B is covered from the front by the surface material 154. The back-side transducer 182B has the function of transmitting the output vibrations to the driver via the pad 153 and the surface material 154.

[0319] At least one of the multiple cushion-side vibrators 182A and the multiple back-side vibrators 182B may include an AC motor. The AC motor is a linear vibration motor, a piezoelectric vibration motor, or the like. The AC motor has a function to independently change the amplitude and frequency of the output vibration depending on the amplitude and frequency of the input AC voltage. Hereinafter, a vibrator 182 having this function will be referred to as an independently variable vibrator 182C.

[0320] Furthermore, at least one of the multiple cushion-side vibrators 182A and the multiple back-side vibrators 182B may be a DC motor. This DC motor has a function to synchronize the frequency and amplitude of the output vibration according to the magnitude of the applied voltage. Hereinafter, a vibrator 182 equipped with this function will be referred to as a synchronized fixed vibrator 182D.

[0321] When the vibration device 181 includes an independently variable vibrator 182C and a linked fixed vibrator 182D, it is preferable that at least one of the independently variable vibrators 182C is located in the center of the seat back 102B in both the vertical and horizontal directions. In this case, at least one of the independently variable vibrators 182C is positioned in a location where the driver can easily perceive the vibration.

[0322] For example, the seat control device 191 is coupled to the bottom surface of the seat cushion 102A. The seat control device 191 is connected to the seating sensor 157 via a harness (not shown). The seat control device 191 is connected to each vibrator 182 via a harness 183.

[0323] As shown in Figure 16(A), the wearable terminal 201 is worn by the driver. In this embodiment, the wearable terminal 201 is a smartwatch (wristwatch-type terminal) worn on the driver's arm.

[0324] Although not shown in the figures, the rear seat 104 is similar to the front seat 102. Specifically, the rear seat 104 also includes a rotating mechanism 161, a sliding mechanism 163, a seating sensor 171, a vibration device 181, a reclining mechanism 165, and the like.

[0325] As shown in Figure 17, the vehicle control device 117 is an electronic control device that includes a processor 117A such as a CPU, a non-volatile memory 117B (ROM), a volatile memory 117C (RAM), storage 117D, a communication interface 117E (communication I / F), and the like.

[0326] In the vehicle control device 117, the processor 117A controls the display device 111 and the audio output device 112, etc., by executing control programs stored in the volatile memory 117C and storage 117D.

[0327] The seat control device 191 is an electronic control device that includes a processor 191A such as a CPU, a non-volatile memory 191B (ROM), a volatile memory 191C (RAM), storage 191D, a communication interface 191E (communication I / F), and a digital-to-analog converter 191F (DA converter).

[0328] In the seat control device 191, the processor 191A has the function of communicating with the vehicle control device 117 via the communication interface 191E. The processor 191A also has the function of communicating with the wearable terminal 201 via the communication interface 191E. The processor 191A controls the vibration device 181 by executing control programs stored in the non-volatile memory 191B and storage 191D.

[0329] The wearable device 201 includes a processor 201A, memory 201B, communication interface 201C (communication I / F), touch panel 201D, and heart rate sensor 201E.

[0330] In the wearable terminal 201, the processor 201A has the function of communicating with the vehicle control device 117 via the communication interface 201C. The processor 201A has the function of communicating with the seat control device 191 via the communication interface 201C. The processor 201A has the function of communicating with an external device via the communication interface 201C.

[0331] In the wearable device 201, the heart rate sensor 201E acquires information related to the driver's heart rate. For example, the heart rate sensor 201E is an optical heart rate sensor equipped with a light-emitting element that irradiates light toward the driver's skin and a photodiode that detects the intensity of the reflected light. In this case, the heart rate sensor 201E detects a waveform that indicates the intensity of the reflected light detected by the photodiode. This waveform reflects the changes in blood flow caused by the heartbeat. The heart rate sensor 201E may also be a sensor using the Doppler effect with radio waves or a sensor using a piezoelectric element.

[0332] The processor 201A, acting as a heart rate measurement device, measures heart rate by performing time-series analysis of the waveform acquired by the heart rate sensor 201E. For example, the processor 201A acquires heart rate information by obtaining the time interval from one peak to the next in the waveform output from the heart rate sensor 201E.

[0333] For example, when a driver is tense or excited, their heart rate increases. Conversely, when a driver's level of alertness decreases, their heart rate decreases. Memory 201B holds thresholds for determining these driver states. For example, memory 201B holds lower and upper heart rate limits (hereinafter referred to as lower heart rate limits) suitable for driving operations.

[0334] The lower heart rate threshold is set as the heart rate threshold at which the driver's level of alertness and concentration may be low. The upper heart rate threshold is set as the heart rate threshold at which the driver may be too excited, potentially causing delays in driving operations, or impairing the driver's judgment and cognitive abilities.

[0335] If the wearable device 201 is constantly worn by the driver, the processor 201A may estimate the lower and upper heart rate limits based on the standard heart rate acquired by the heart rate sensor 201E and record them in the memory 201B. Alternatively, the processor 201A may estimate the lower and upper heart rate limits based on the driver's input of age, blood pressure, body size, etc., via the touch panel 201D and record them in the memory 201B. In these cases, the lower and upper heart rate limits are set to values ​​unique to each driver. This allows for a more appropriate determination of the driver's condition.

[0336] The lower and upper heart rate limits may be set based on standard values ​​for a healthy person. In this case, the lower and upper heart rate limits may be stored in memory 201B at the time of factory shipment or during the installation of various applications. The processor 201A may also communicate with various servers (not shown) via the communication interface 201C to obtain the lower and upper heart rate limits and record them in memory 201B.

[0337] In the vehicle, the seat control device 191 acquires the driver's heart rate in real time from the wearable terminal 201. If the driver's heart rate is outside a preset acceptable range, the seat control device 191 operates the vibration device 181 until the driver's heart rate falls outside the acceptable range, thereby guiding the driver's heart rate.

[0338] In this case, the seat control device 191 uses a digital-to-analog converter 191F to convert the digital signal output from the processor 191A into an analog voltage, thereby controlling the amplitude and frequency of the vibration output by the corresponding vibrator 181A.

[0339] For example, the seat control device 191 uses the upper heart rate value obtained from the wearable terminal 201 as the first threshold. If the driver's heart rate is higher than the first threshold, the seat control device 191 controls the vibration device 181 to lower the driver's heart rate. Specifically, the seat control device 191 vibrates the vibrator 181A at a frequency slower than the current heart rate.

[0340] In this case, the vibration device 181 functions as a heart rate induction device that induces fluctuations in the driver's heart rate. Specifically, the vibration device 181 slows down the driver's heart rate, thereby eliminating situations where the driver is overexcited, causing delays in driving operations or a decline in the driver's judgment and cognitive abilities, and guiding the driver to a state suitable for driving.

[0341] For example, the seat control device 191 uses the lower limit of the heart rate obtained from the wearable terminal 201 as the second threshold. If the driver's heart rate is lower than the second threshold, the seat control device 191 controls the vibration device 181 to increase the driver's heart rate. Specifically, the seat control device 191 vibrates the vibrator 181A at a frequency faster than the current heart rate.

[0342] In this case, the vibration device 181 functions as a heart rate induction device that induces fluctuations in the driver's heart rate. Specifically, the vibration device 181 speeds up the driver's heart rate, thereby eliminating a state in which the driver is not fully alert and not fully focused, and guiding them to a state suitable for driving.

[0343] However, in this embodiment, as a general rule, the operation of the vibration device 181 is prohibited when the vehicle is moving through the highway merging area 211. The highway merging area 211 will be described below.

[0344] As shown in Figure 18, the highway merging area 211 includes the main lane 212 and the merging lane 213. The main lane 212 is the primary lane for long-distance travel. The merging lane 213 is the lane for entering the main lane 212. The merging lane 213 includes an acceleration area 213A. The acceleration area 213A is the area adjacent to the main lane 212.

[0345] In this embodiment, the main line 212 includes a first lane 212A and a second lane 212B. The first lane 212A is the lane adjacent to the acceleration area 213A. For example, the second lane 212B is the lane adjacent to the first lane 212A on the opposite side from the acceleration area 213A.

[0346] Although not shown in the diagram, when the vehicle is moving in a location other than the merging area 211, the seat control device 191 controls the vibration device 181 based on preset conditions. On the other hand, when the vehicle is moving in the merging area 211, the seat control device 191 generally prohibits the vibration device 181 from operating.

[0347] The following describes an example of the control process for the heart rate induction device performed by the seat control device 191, with reference to a flowchart. The processor 191A repeats this control process while the vehicle is running.

[0348] As shown in Figure 19, in step ST101, the processor 191A determines whether or not the vehicle is moving through the merging area 211.

[0349] If it is determined in step ST101 that the vehicle is not moving through the merging area 211, step ST102 is executed. In step ST102, the processor 191A determines whether the driver's heart rate is higher than the first threshold.

[0350] If the heart rate is determined to be below the first threshold in step ST102, step ST103 is executed. In step ST103, the processor 191A does not operate the vibration device 181. After that, step ST101 is executed.

[0351] If it is determined in step ST102 that the heart rate is higher than the first threshold, step ST104 is executed. In step ST104, the processor 191A operates the vibration device 181 to lower the driver's heart rate. After that, step ST101 is executed.

[0352] If it is determined in step ST101 that the vehicle is moving through the merging area 211, step ST105 is executed. In step ST105, the processor 191A prohibits the vibration device 181 from operating.

[0353] After step ST105, step ST106 is executed. In step ST106, the processor 191A determines whether the vehicle has moved a predetermined distance away from the merging area 211.

[0354] If step ST106 determines that the vehicle is not a predetermined distance away from the highway merging area 211, step ST107 is executed. In step ST107, the processor 191A determines whether or not a moving object has been detected.

[0355] If no moving object is detected in step ST107, step ST108 is executed. In step ST108, the processor 191A maintains a state in which the vibration device 181 is prohibited from operating.

[0356] If a moving object is detected in step ST107, step ST109 is executed. In step ST109, the processor 191A releases the state that prohibits the vibration device 181 from operating.

[0357] After step ST108 or step ST109, step ST106 is executed.

[0358] If step ST106 determines that the vehicle has moved a predetermined distance away from the highway merging area 211, step ST110 is executed. In step ST110, the processor 191A releases the state that prohibits the vibration device 181 from operating. After that, step ST101 is executed.

[0359] According to the fifth embodiment described above, when the vehicle is moving through the merging area 211, the operation of the vibration device 181 is prohibited. This provides an appropriate method for inducing the driver's heart rate. In the merging area 211, where cutting in and lane changes are likely to occur, the operation of the vibration device 181 does not distract the driver. As a result, the driver can maintain a moderate level of concentration.

[0360] For example, when a vehicle is moving through the acceleration area 213A in the merging area 211, the vibration device 181 does not operate. Therefore, when a vehicle is merging onto the main line 212, the driver can maintain a reasonable level of concentration.

[0361] For example, when a vehicle is moving on the main line 212 in the merging area 211, the vibration device 181 does not operate. Therefore, in situations where other moving objects are likely to cut in front of the vehicle, the driver can maintain a reasonable level of concentration.

[0362] For example, when a vehicle is moving in the first lane 212A adjacent to the acceleration area 213A within the main lane 212 in the merging area 211, the vibration device 181 does not operate. Therefore, in situations where other moving objects are likely to cut in front of the vehicle, the driver can maintain a reasonable level of concentration.

[0363] For example, when a vehicle is moving in the second lane 212B adjacent to the first lane 212A on the opposite side of the acceleration area 213A within the main lane 212 in the merging area 211, the vibration device 181 does not operate. Therefore, in situations where another first moving vehicle enters the first lane 212A from the acceleration area 213A, and there is a possibility that the second moving vehicle will change lanes from the first lane 212A to the second lane 212B, the driver can maintain a reasonable level of concentration.

[0364] Furthermore, if the vehicle is moving in the first lane 212A adjacent to the acceleration area 213A within the main line 212 in the merging area 211, and after the operation of the vibration device 181 has been prohibited, the prohibition on the operation of the heart rate induction device is lifted. This allows the driver to be guided into a state suitable for driving when other moving objects are present nearby.

[0365] Furthermore, if the vehicle is moving in the first lane 212A adjacent to the acceleration area 213A within the main line 212 in the merging area 211, and no other moving objects are detected after the operation of the vibration device 181 has been prohibited, the prohibition on the operation of the vibration device 181 may be lifted. In this case, the driver can be guided to a state suitable for driving when no other moving objects are present nearby.

[0366] Furthermore, if the vehicle is moving through the merging area 211 and the operation of the vibration device 181 has been prohibited, and the vehicle has moved a predetermined distance away from the merging area 211, the prohibition on the operation of the vibration device 181 is lifted. This allows the driver to be guided to a state suitable for driving outside the merging area 211.

[0367] Furthermore, the vibration device 181 is installed in the vehicle seat. This makes it easy to guide the driver into a state suitable for driving.

[0368] Furthermore, a vibration device mounted on the wearable terminal 201 may be used as a heart rate induction device. In this case, even in vehicles where the vibration device 181 is not provided, the driver can be easily guided to a state suitable for driving.

[0369] Alternatively, instead of the heart rate sensor 201E of the wearable terminal 201, a heart rate sensor provided on the front seat 102 may be used as the heart rate measurement device.

[0370] Furthermore, if the position information acquisition device 115 is unable to receive radio signals from the satellite, it is not necessary to disable the operation of the vibration device 181.

[0371] Furthermore, if the position information acquisition device 115 is unable to receive radio signals from the satellite, the operation of the vibration device 181 may be prohibited until the position information acquisition device 115 is able to receive radio signals.

[0372] Furthermore, a third threshold may be set that is smaller than the first threshold and larger than the second threshold. In this case, if the vehicle is moving through the merging area 211 and the driver's heart rate decreases after the operation of the vibration device 181 has been prohibited, the prohibition on the operation of the vibration device 181 may be lifted.

[0373] Alternatively, the heart rate induction device may induce the driver to relax by rocking the front seat 102 like a cradle.

[0374] <<Sixth Embodiment>> In the sixth embodiment, the conditions for prohibiting the operation of the vibration device 181 differ from those in the fifth embodiment. The differences from the fifth embodiment will be explained below.

[0375] Figure 20(A) shows a case where a vehicle overtakes another moving object. In this case, as indicated by the arrow, the vehicle changes lanes while moving behind the other moving object in the same lane, and then moves in front of the other moving object.

[0376] Figure 20(B) shows a case where a vehicle overtakes another moving object. In this case, as indicated by the arrow, the vehicle moves in a different lane from the other moving object, passing behind it, and then moves in front of it without changing lanes.

[0377] In the sixth embodiment, when the vehicle overtakes or passes another moving object, if the acceleration of the vehicle is greater than a preset first acceleration threshold, the operation of the vibration device 181 is prohibited as a general rule.

[0378] For example, overtaking or passing another moving object is determined by the vehicle control device 117 based on the detection result of the moving object detection device 116. For example, the acceleration of the vehicle is determined by the vehicle control device 117 based on the location information detection result of the location information acquisition device 115.

[0379] An example of the control process for the heart rate induction device performed by the seat control device 191 will be explained with reference to a flowchart. The processor 191A repeats this control process while the vehicle is running.

[0380] As shown in Figure 21, in step ST111, the processor 191A determines whether the vehicle's acceleration is greater than the first acceleration threshold.

[0381] If step ST111 determines that the vehicle's acceleration is below the first acceleration threshold, step ST112 is executed. In step ST112, the processor 191A determines whether the driver's heart rate is higher than the first threshold.

[0382] If the heart rate is determined to be below the first threshold in step ST112, step ST113 is executed. In step ST113, the processor 191A does not operate the vibration device 181. After that, step ST111 is executed.

[0383] If it is determined in step ST112 that the heart rate is higher than the first threshold, step ST114 is executed. In step ST114, the processor 191A operates the vibration device 181 to lower the driver's heart rate. Then, step ST111 is executed.

[0384] If it is determined in step ST111 that the vehicle's acceleration is greater than the first acceleration threshold, step ST115 is executed. In step ST115, the processor 191A prohibits the vibration device 181 from operating. After step ST115, step ST116 is executed. In step ST116, the processor 191A determines whether or not the first moving object has been detected in front of the device within a preset range.

[0385] If the first moving object is not detected in step ST116, step ST117 is executed. In step ST117, the processor 191A releases the state that prohibits the operation of the vibration device 181. Then, step ST111 is executed.

[0386] If the first moving object is detected in step ST116, step ST118 is executed. In step ST118, the processor 191A determines whether the vehicle has overtaken the first moving object.

[0387] If the vehicle has not overtaken the first moving object in step ST118, step ST118 is repeated. If the vehicle has overtaken the first moving object in step ST118, step ST119 is executed. In step ST119, the processor 191A determines whether or not a second moving object has been detected ahead of the first moving object within a predetermined range.

[0388] If the second moving object is not detected in step ST119, step ST120 is executed. In step ST120, the processor 191A releases the state that prohibits the operation of the vibration device 181. Then, step ST111 is executed.

[0389] If a second moving object is detected in step ST119, step ST121 is executed. In step ST121, the processor 191A maintains a state in which the vibration device 181 is prohibited from operating. Subsequently, step ST122 is executed.

[0390] In step ST122, the processor 191A determines whether the acceleration of the second moving object is less than or equal to a preset second acceleration threshold.

[0391] If the acceleration of the second moving object is less than or equal to the second acceleration threshold in step ST122, step ST123 is executed. In step ST123, the processor 191A operates the voice output device 112 corresponding to the driver's seat. At this time, the voice output device 112, as a notification device, outputs voice information indicating that the second moving object has come to a sudden stop or decelerated suddenly.

[0392] If the acceleration of the second moving object is greater than the second acceleration threshold in step ST122, or if step ST124 is performed after step ST123, step ST124 is executed. In step ST124, the processor 191A determines whether or not the third moving object is approaching from behind.

[0393] If the third mobile object is not approaching from the rear in step ST124, step ST111 is executed. If the third mobile object is approaching from the rear in step ST124, step ST125 is executed. In step ST125, the processor 191A operates the voice output device 112 corresponding to the driver's seat. At this time, the voice output device 112, as a notification device, outputs information in voice indicating that the third mobile object is approaching from the rear. After that, step ST111 is executed.

[0394] Furthermore, the same control procedure as in Figure 21 may be applied when the vehicle overtakes the first moving object.

[0395] According to the sixth embodiment described above, when the vehicle's acceleration is greater than the first acceleration threshold, the vibration device 181 is prohibited from operating. Therefore, when the driver's heart rate increases due to voluntary actions such as when the vehicle overtakes or passes another moving object, the driver's concentration will not be diminished by the operation of the vibration device 181. As a result, the driver can maintain a moderate level of concentration.

[0396] Furthermore, when the vehicle's acceleration is greater than the first acceleration threshold and the operation of the vibration device 181 is prohibited, the prohibition on the operation of the vibration device 181 is lifted after the vehicle overtakes or passes the first moving object. Therefore, after the vehicle overtakes or passes the first moving object, the driver can maintain a state suitable for driving unrelated to overtaking or passing.

[0397] However, if the second moving object is detected ahead of the first moving object, the operation of the vibration device 181 is kept prohibited. Therefore, the driver can maintain a reasonable level of concentration while overtaking and passing the second moving object.

[0398] Furthermore, the audio output device 112 operates when the acceleration of the second moving object is below the second acceleration threshold. This allows the driver to be notified that the second moving object has come to a sudden stop or has come to a sudden stop.

[0399] Furthermore, if a third mobile object is approaching from behind, the audio output device 112 will activate. This allows the driver to be notified that a third mobile object is approaching from behind.

[0400] In addition, a heart rate induction device such as the vibration device 181 on the front seat 102 may be used as a notification device instead of the voice output device 112.

[0401] <<Seventh Embodiment>> In the seventh embodiment, the conditions for prohibiting the operation of the vibration device 181 differ from those in the fifth embodiment. The following will mainly describe the differences from the fifth embodiment.

[0402] Figure 22 shows examples of road signs. Figure 22(A) is an example of a bus stop sign. Figure 22(B) is an example of a sign indicating the possibility of animals crossing the road. Figure 22(C) is an example of a sign indicating merging traffic.

[0403] In the seventh embodiment, when the vehicle is moving through an urban area, it is determined whether or not to operate the vibration device 181 based on the type of road sign.

[0404] For example, whether or not a vehicle is moving in an urban area is determined by the vehicle control device 117. For example, the vehicle control device 117, as a movement status device, determines whether or not the vehicle is moving in an urban area based on location information from the location information acquisition device 115 and map information.

[0405] For example, the type of road sign is determined by the vehicle control device 117. For example, the vehicle control device 117, acting as a sign determination device, compares image information from the moving object detection device 116 with pre-stored image information to determine the type of road sign.

[0406] An example of the control process for the vibration device 181 performed by the seat control device 191 will be explained with reference to a flowchart. The processor 191A repeats this control process while the vehicle is running.

[0407] In step ST131, the processor 191A determines whether or not there are road signs around the vehicle. If there are no road signs around the vehicle in step ST131, step ST131 is repeated.

[0408] If road signs are present around the vehicle in step ST131, step ST132 is executed. In step ST132, the processor 191A determines whether the road sign is a sign indicating a stopping place for the vehicle.

[0409] If the road sign in step ST132 indicates a vehicle stopping place, step ST133 is executed. In step ST133, the processor 191A prohibits the vibration device 181 from operating until a preset time has elapsed or the vehicle has moved a preset distance. Then, step ST131 is executed.

[0410] If the road sign in step ST132 is not a sign indicating a place to stop a vehicle, step ST134 is executed. In step ST134, the processor 191A determines whether the road sign is a sign indicating the possibility of an animal suddenly appearing.

[0411] If the road sign in step ST134 is a sign indicating the possibility of an animal suddenly appearing, step ST133 is executed. If the road sign in step ST134 is not a sign indicating the possibility of an animal suddenly appearing, step ST135 is executed. In step ST135, the processor 191A determines whether or not the road sign is a sign indicating merging traffic.

[0412] If the road sign in step ST135 indicates merging traffic, step ST133 is executed. If the road sign in step ST135 does not indicate merging traffic, step ST131 is executed.

[0413] According to the seventh embodiment described above, in urban areas, it is determined whether or not to operate the vibration device 181 based on the type of road sign. Specifically, it is determined whether or not to prohibit the operation of the vibration device 181 based on the type of road sign. Therefore, the vibration device 181 can be appropriately controlled in urban areas where there is a possibility of people or other objects suddenly appearing.

[0414] For example, if the road sign is a bus stop or other sign indicating a vehicle stopping place, the operation of the vibration device 181 is prohibited until a predetermined time has elapsed or until the vehicle has traveled a predetermined distance. Therefore, in places where there is a possibility of a person suddenly appearing, the driver can maintain a reasonable level of concentration.

[0415] Furthermore, signs indicating vehicle stopping points may also be signs indicating taxi stands, parking areas, etc. In this case as well, drivers can maintain a reasonable level of concentration in areas where there is a possibility of people suddenly appearing.

[0416] For example, if a road sign indicates the possibility of an animal suddenly appearing, the operation of the vibration device 181 is prohibited until a predetermined time has elapsed or until the vehicle has traveled a predetermined distance. This allows the driver to maintain a reasonable level of concentration in areas where animals may suddenly appear.

[0417] For example, if the road sign indicates merging traffic, the operation of the vibration device 181 is prohibited until a predetermined time has elapsed or until the vehicle has traveled a predetermined distance. This allows the driver to maintain a reasonable level of concentration in places where other moving objects may suddenly appear.

[0418] <<Eighth Embodiment>> In the eighth embodiment, the conditions for prohibiting the operation of the vibration device 181 differ from those in the fifth embodiment. The differences from the fifth embodiment will be explained below.

[0419] In the eighth embodiment, the operation of the vibration device 181 is controlled based on the heart rate and emotions of a occupant seated in the front seat 102 or the like. For example, the emotion is determined by the vehicle control device 117. For example, the vehicle control device 117, acting as a driver emotion determination device, determines the driver's emotions based on images from the camera 113. Furthermore, if the vehicle is not moving, the operation of the vibration device 181 is prohibited.

[0420] As shown in Figure 24, when the vehicle is not moving and there are occupants in both the front seat 102 and the mid seat 103, the vehicle control device 117 moves at least one of the front seat 102 and the mid seat 103 via the corresponding seat control device 191 so that both seats are closer together. In Figure 24, the vehicle control device 117 moves the mid seat 103 so that both the front seat 102 and the mid seat 103 are closer together.

[0421] As shown in Figure 25, when the vehicle is not moving and there are occupants in both the front seat 102 and the mid seat 103, the vehicle control device 117 may move at least one of the front seat 102 and the mid seat 103 via the corresponding seat control device 191 so that both the front seat 102 and the mid seat 103 face each other. In Figure 25, the vehicle control device 117 rotates the front seat 102 so that both the front seat 102 and the mid seat 103 face each other.

[0422] An example of the control process for the vibration device 181 performed by the vehicle control device 117 will be explained with reference to a flowchart. The processor 117A repeats this control process while the vehicle is running.

[0423] In step ST141, the processor 117A determines whether the vehicle is moving or not. If the vehicle is moving in step ST141, step ST141 is repeated.

[0424] If the vehicle is moving in step ST141, step ST142 is executed. In step ST142, the processor 117A prohibits the vibration device 181 from operating. Then, step ST143 is executed. In step ST143, the processor 117A determines whether there are occupants in both the front seat 102 and the mid seat 103.

[0425] If step ST143 determines that there are no occupants in at least one of the front seat 102 and the mid seat 103, step ST141 is executed. In step ST143, if the processor 117A determines that there are occupants in both the front seat 102 and the mid seat 103, step ST144 is executed.

[0426] In step ST144, the processor 117A moves both the front seat 102 and the mid seat 103 so that both seats are closer together. Then, step ST141 is performed.

[0427] According to the eighth embodiment described above, the operation of the vibration device 181 is controlled based on the driver's heart rate and the driver's emotions. This suppresses the driver from becoming upset.

[0428] Furthermore, the vibration device 181 is disabled when the vehicle is not moving. Therefore, when the driver or other personnel are away from driving and taking a break, the seated passengers can maintain a state suitable for resting.

[0429] Furthermore, when the vehicle is not moving and there are occupants in both the front seat 102 and the mid seat 103, at least one of the front seat 102 and the mid seat 103 will move so that both seats are closer together. This allows occupants to be closer to each other. As a result, communication between occupants can be improved.

[0430] Furthermore, when the vehicle is not moving and there are occupants in both the front seat 102 and the mid seat 103, at least one of the front seat 102 and the mid seat 103 rotates so that both seats face each other. This allows occupants to face each other, thereby improving communication between occupants.

[0431] Furthermore, the determination of emotions may be based on the voice input to the voice input device 114. For example, if there are multiple passengers, or if a passenger is talking to someone outside the vehicle, emotions may be determined based on the volume and content of the voice.

[0432] This concludes the description of specific embodiments, but the present invention is not limited to the above embodiments and can be broadly modified and implemented. In the above embodiments, the seat control device 27 and the vehicle control device 5 were configured as separate units, but they may be configured as a single control device. Also, the seat control device 27 may be configured as a plurality of devices (computers).

[0433] In the above embodiment, the digital signal generated by the processor 50 of the sheet control device 27 was converted into an analog signal by the digital-to-analog converter 54 and output directly to the vibrator 45. However, various amplifiers, modulators, etc., may be provided between the digital-to-analog converter 54 and the vibrator 45. The processor 50 may also be configured to control the amplifiers, modulators, etc.

[0434] In the above embodiment, an example was described in which the heart rate sensor 25 is provided on the wearable terminal 18. However, the heart rate sensor 25 may be provided in any location where it can acquire biometric information related to the driver's heart rate, for example, it may be provided on the seat body 28 or the steering wheel.

[0435] Furthermore, although an example has been described in which the vibrator 45 included in the vibration generating device 29 is provided on the seat cushion 31 and the seat back 32, the vibrator 45 only needs to be provided on at least one of the seat cushion 31, the seat back 32, and the headrest 33.

[0436] The vibration generating device 29 may include an air cell (air bag) that extends and retracts the seating surface, and a controller (also called a supply / discharge device) that supplies and discharges air into the air cell. The controller may introduce and discharge air into the air cell at a predetermined vibration frequency, causing the seating surface to extend and retract, and providing feedback to the driver.

[0437] In addition, the vibration generator 29 may be configured to induce the driver's heart rate by causing the seat body 28 to swing in directions such as left, right, forward, or backward. Furthermore, the vibration generator 29 may be installed in a location other than the seat body 28, as long as it is capable of inducing the driver's heart rate; for example, it may be mounted on a wearable terminal 18.

[0438] In the above embodiment, the driver camera 15 was configured to acquire identifying information for identifying the driver. However, the means for identifying the driver is not limited to the driver camera 15, and may be configured, for example, by an input device such as a touch panel that accepts input such as the driver's name.

[0439] In the first embodiment described above, the system was configured such that the induction process is not executed (i.e., the execution of the induction process is prohibited) when the elapsed time since the driver sat down is less than the prohibited time and the driver's heart rate is greater than the upper heart rate limit or less than the lower heart rate limit, but the system is not limited to this embodiment. The seat system 1 (vehicle seat 20) includes a seat body 28 that constitutes the driver's seat 13, a vibration generator 29 that provides vibration to the driver seated on the seat body 28, and a seat control device 27 that can execute an induction process to control the vibration generator 29 in order to bring the driver's heart rate closer to a predetermined standard heart rate when the driver's heart rate is greater than or equal to the upper heart rate limit, and the system may be configured such that the induction process is not executed (the induction process is prohibited) when the elapsed time since the vehicle 2 was turned on is less than the prohibited time.

[0440] In the third embodiment described above, the induction process was configured to be executed when the driver's heart rate is greater than the upper heart rate limit or less than the lower heart rate limit during the execution time δ after the power of the vehicle 2 is turned on. However, the system is not limited to this embodiment. For example, the seat system 1 (vehicle seat 20) includes a seat body 28 that constitutes the driver's seat 13, a vibration generator 29 that provides vibration to the driver seated on the seat body 28, and a seat control device 27 that can execute an induction process to control the vibration generator 29 in order to bring the driver's heart rate closer to the standard heart rate when the driver's heart rate is greater than or equal to the upper heart rate limit or less than or equal to the lower heart rate limit. The seat control device 27 may be configured to execute the induction process when the elapsed time since the driver sat on the seat body 28 is less than the execution time δ.

[0441] In the above embodiment, an example of the seat system 1 being applied to a four-wheeled automobile was described, but the seat system 1 is applicable to various vehicles, including buses, trucks, trains, ships, etc., that are operated by a driver and include a passenger seat 20.

[0442] Furthermore, the seat control in the fifth to eighth embodiments may be applied to seats other than the front seat 102. Also, the seat control in the fifth to eighth embodiments may be applied to various vehicles, including buses, trucks, trains, ships, etc.

[0443] Furthermore, if a vehicle deviates from its lane and is notified by the audio output device 112, etc., and then deviates from its lane again within a predetermined time, the audio output device 112, etc. may be prohibited from issuing a further notification. In this case, by issuing a strong notification only the first time, it is possible to avoid startling the driver or other passengers unnecessarily. As a result, the mental burden on passengers can be reduced.

[0444] Furthermore, if a vehicle deviates from its lane and is notified by the audio output device 112, etc., and then deviates from its lane again within a predetermined time, the output of the subsequent notification by the audio output device 112, etc. may be reduced compared to the first notification. In this case, it is possible to notify the occupants that the vehicle is continuing in an undesirable state while avoiding startling the driver or other occupants unnecessarily.

[0445] Furthermore, if a vehicle deviates from its lane and is notified by the audio output device 112, etc., and then deviates from its lane again within a predetermined time, the output of the subsequent notification by the audio output device 112, etc. may be increased compared to the first notification. In this case, the seated passengers can be reliably notified that the vehicle is continuing in an undesirable state of movement.

[0446] Furthermore, in an aircraft equipped with a front seat 102, etc., similar to the fifth to eighth embodiments, a device for detecting the altitude of the aircraft may be provided, and if it is determined that the aircraft is traveling at an altitude higher than a preset altitude, the operation of the vibration device 181 may be prohibited. When the aircraft is flying at an altitude higher than a preset altitude, safety is relatively high. For this reason, unnecessary heart rate guidance can be prohibited for seated passengers.

[0447] 1: Seat system 2: Vehicle (example of a vehicle) 5: Vehicle control device (example of a control device) 13: Driver's seat 20: Vehicle seat 25: Heart rate sensor 27: Seat control device (example of a control device) 28: Seat body 29: Vibration generator τ: Prohibition time δ: Execution time

Claims

1. A vehicle seat to be installed in a vehicle, comprising: a seat body constituting a driver's seat; a vibration generating device that provides vibration to a driver seated in the seat body; and a control device capable of performing induction processing to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate when the driver's heart rate is outside a predetermined heart rate range, wherein the control device prohibits the execution of the induction processing when the elapsed time since the driver sat in the seat body is less than a predetermined prohibition time.

2. The vehicle seat according to claim 1, wherein the control device stores identification information for identifying a person seated in the seat body in association with the standard heart rate of the person corresponding to the identification information, and sets the standard heart rate by acquiring the identification information of the driver.

3. The vehicle seat according to claim 1, wherein the control device stores identification information for identifying a person seated in the seat body, the heart rate range and standard heart rate of the person corresponding to the identification information in association with the control device, and sets the heart rate range and standard heart rate by acquiring the identification information of the driver.

4. The vehicle seat according to claim 1, wherein the control device stores identification information for identifying a person seated in the seat body in association with the standard heart rate of the person corresponding to the identification information, acquires the identification information of the driver, acquires the corresponding standard heart rate based on the acquired identification information of the driver, and sets the heart rate range based on the acquired standard heart rate.

5. The vehicle seat according to claim 1, wherein the control device stores identification information for identifying a person seated in the seat body in association with the prohibited time, and sets the prohibited time by acquiring the identification information of the driver.

6. The vehicle seat according to claim 1, wherein the control device determines that the driver's heart rate is outside the heart rate range when the driver's heart rate is greater than a predetermined upper heart rate value or less than a predetermined lower heart rate value.

7. The vehicle seat according to claim 6, wherein the control device sets the frequency of vibrations to be generated by the vibration generating device based on the driver's heart rate during the induction process.

8. The vehicle seat according to any one of claims 1 to 7, wherein the control device sets the frequency of the vibration generated by the vibration generating device between the driver's heart rate and the standard heart rate in the induction process.

9. A seat system comprising: a seat body constituting the driver's seat of a vehicle; a vibration generating device that applies vibration to a driver seated in the seat body; a heart rate sensor that acquires biological information relating to the driver's heartbeat; and a control device that controls the vibration generating device, wherein the control device is configured to acquire the driver's heart rate based on the biological information acquired by the heart rate sensor, and to perform an induction process to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate when the driver's heart rate is outside a predetermined heart rate range, and to prohibit the execution of the induction process when the elapsed time since the driver sat in the seat body is less than a predetermined prohibition time.

10. A method for controlling a vehicle seat, comprising: a seat body constituting the driver's seat of a vehicle; a vibration generating device that provides vibration to a driver seated in the seat body; and a control device that controls the vibration generating device, wherein the control device is configured to acquire the driver's heart rate, and when the driver's heart rate is outside a predetermined heart rate range, to perform an induction process to control the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate, and prohibits the execution of the induction process when the elapsed time since the driver sat in the seat body is less than a predetermined prohibition time.

11. A control program for a vehicle seat comprising: a seat body constituting the driver's seat of a vehicle; a vibration generating device that provides vibration to a driver seated in the seat body; and a control device that controls the vibration generating device, wherein the control device is configured to acquire the driver's heart rate, and when the driver's heart rate is outside a predetermined heart rate range, to execute an induction process that controls the vibration generating device in order to bring the driver's heart rate closer to a predetermined standard heart rate, and prohibits the execution of the induction process when the elapsed time since the driver sat in the seat body is less than a predetermined prohibition time.

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