Attention warning system and attention warning method

Abstract

To communicate a contact risk between a self vehicle and a nearby object in such a manner that a driver does not make a passenger feel uneasy and the passenger can feel a sense of security.SOLUTION: An attention attracting system comprises: a plurality of HMI devices that provide a notification to an occupant; and an attention attracting device that notifies the occupant of a contact risk between a self vehicle and an object via the HMI devices. The attention attracting device comprises: a risk identification unit that identifies a risk level of the contact risk; and a notification unit. The notification unit executes a first notification for notifying a driver of the presence of the contact risk via a driver HMI device which exclusively provides notifications to the driver when the risk level exceeds a first threshold value, and executes a second notification for notifying a passenger of the presence of the contact risk via a passenger HMI device which exclusively provides notifications to the passenger when the risk level exceeds a second threshold value greater than the first threshold value or when a predetermined amount of time has passed from the execution of the first notification.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an attention attracting system and an attention attracting method for attracting the attention of an occupant in a vehicle. [Background technology]

[0002] In recent years, efforts to provide access to sustainable transport systems that take into consideration vulnerable transport participants have become more active. To achieve this, we are focusing on research and development into preventive safety technologies to further improve road safety and convenience.

[0003] Patent document 1 describes that when issuing a warning to the driver and passengers about the possibility of a collision between the vehicle and an object, the warning for the passengers is issued earlier than the warning for the driver. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2016 / 059724 Summary of the Invention [Problem to be solved by the invention]

[0005] In preventive safety technology, when a risk of contact between the vehicle and a surrounding object occurs, the challenge is to notify the driver of the risk of contact in a manner that does not make the driver feel embarrassed or uncomfortable in relation to their driving behavior in front of passengers. In order to solve the above-mentioned problems, the present application aims to notify the driver of the risk of contact between the vehicle and surrounding objects in a manner that does not cause passengers to feel uncomfortable and gives passengers a sense of security, thereby contributing to the development of a sustainable transportation system. [Means for solving the problem]

[0006] One aspect of the present invention is an attention warning system comprising a plurality of HMI devices that notify a driver and other passengers aboard a vehicle, and an attention warning device that notifies the driver and the passengers by the HMI devices of the possibility of contact between the vehicle and an object, wherein the attention warning device includes a risk identification unit that identifies a risk level indicating the degree of possibility of contact between the vehicle and an object present in the surrounding environment of the vehicle, and a risk identification unit that notifies the driver and the passengers by the HMI devices of the existence of a risk of contact between the vehicle and the object according to the risk level. and a notification unit that notifies the driver of the existence of the contact risk, wherein the plurality of HMI devices include a driver HMI device that exclusively notifies the driver and a passenger HMI device that exclusively notifies the passenger, and the notification unit executes a first notification by the driver HMI device to notify the driver of the existence of the contact risk when the risk level exceeds a first threshold, and executes a second notification by the passenger HMI device to notify the passenger of the existence of the contact risk when the risk level exceeds a second threshold that is higher than the first threshold, or when a predetermined time has elapsed since the execution of the first notification. death , When the risk level exceeds a third threshold that is greater than the first threshold and the second threshold, a third notification is executed by the driver HMI device and the passenger HMI device to simultaneously notify the driver and the passenger of the existence of the contact risk. It is a warning system. According to another aspect of the present invention, when the risk level exceeds a third threshold that is greater than the first threshold and the second threshold, the notification unit executes a third notification via the driver's HMI device and the passenger's HMI device to simultaneously notify the driver and the passenger of the existence of the contact risk. According to another aspect of the present invention, the notification intensity of the third notification is greater than the notification intensity of the first notification and the second notification. According to another aspect of the present invention, the driver's HMI device and the passenger's HMI device are electric seat belts provided in the driver's seat and a seat other than the driver's seat of the vehicle, respectively, which change the tension of the seat belt of the corresponding seat and notify the person sitting in that seat. According to another aspect of the present invention, the strength of the notification provided to the driver and passenger by the driver HMI device and passenger HMI device, which are the electric seat belts, is the magnitude of the tension of the seat belts. Another aspect of the present invention is an attention warning method performed by a computer of an attention warning system, the method including: a risk identification step of identifying a risk level indicating the degree of possibility of contact between an object present in the surrounding environment of the vehicle and the vehicle; and a notification step of notifying a driver and a passenger of the vehicle of the risk of contact between the vehicle and the object by an HMI device provided in the vehicle according to the risk level, wherein in the notification step, when the risk level exceeds a first threshold, a driver HMI device that exclusively notifies the driver executes a first notification notifying the driver of the presence of the contact risk, and when the risk level exceeds a second threshold that is higher than the first threshold, or when a predetermined time has elapsed since the execution of the first notification, a passenger HMI device that exclusively notifies the passenger executes a second notification notifying the passenger of the presence of the contact risk. death , When the risk level exceeds a third threshold that is greater than the first threshold and the second threshold, a third notification is executed by the driver HMI device and the passenger HMI device to simultaneously notify the driver and the passenger of the existence of the contact risk. It is a way to raise awareness. [Effects of the Invention]

[0007] According to the present invention, the risk of contact between the vehicle and surrounding objects can be communicated to the driver in a manner that does not cause passengers to feel uncomfortable and that gives passengers a sense of security. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing the configuration of an attention calling system according to one embodiment of the present invention. [Figure 2] FIG. 2 is a diagram showing the configuration of a vehicle equipped with an attention-attention system. [Figure 3] FIG. 3 is a flowchart showing the procedure of the attention-attracting method executed by the attention-attracting system. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing the configuration of an attention calling system 1 according to one embodiment of the present invention. 、 FIG. 2 is a diagram showing the configuration of a vehicle 2 in which the attention calling system 1 is installed, and FIG. 3 is a diagram showing the configuration of the interior of the vehicle 2. As shown in FIG.

[0010] The attention warning system 1 is installed in the host vehicle 2, detects the possibility of contact between the host vehicle 2 and an object (hereinafter also referred to as contact risk), and notifies the driver and passengers of the host vehicle 2 that there is a contact risk. Here, "host vehicle" means a vehicle in which the attention warning system 1 is installed. Furthermore, a passenger refers to a person other than the driver who is riding in the host vehicle 2. Furthermore, hereinafter, "occupants" refers to the driver and passengers.

[0011] The attention alert system 1 is a system that uses multiple HMIs (Human-Machine Interfaces) to notify the driver and passengers in the vehicle 2. r The vehicle includes a driver's HMI device 3a that notifies the driver of the vehicle 2 of the risk of contact, and a warning device 4 that notifies the driver and passengers of the risk of contact via the HMI device 3. The HMI device 3 includes a driver's HMI device 3a that notifies the driver of the vehicle 2 exclusively, and one or more passenger's HMI devices 3b that notify the passengers exclusively.

[0012] In this embodiment, the driver's HMI device 3a is 2 The passenger HMI device 3b is an electric seat belt provided in the driver's seat 20, and notifies the driver by changing the tension of the seat belt of the driver's seat 20. The passenger HMI device 3b is an electric seat belt provided in each of the three passenger seats 21 other than the driver's seat 20, and notifies the passenger sitting in the corresponding passenger seat 21 by changing the tension of the seat belt of the corresponding passenger seat 21.

[0013] However, the power seat belt is just one example of the HMI device 3, and the HMI device 3 may be any device capable of separately notifying the driver of the vehicle 2 and one or more passengers. For example, the HMI device 3 may be a directional LED lighting or display device provided in front of each passenger seat 21 and visible only to the passenger. Alternatively, the HMI device 3 may be a directional headrest speaker or a seat speaker provided in each seat and outputting sounds audible only to the passenger. Alternatively, the driver HMI device 3a and / or the passenger HMI device 3b may each be a combination of the above-mentioned power seat belt, directional LED lighting or display device, and / or directional speaker. Alternatively, the driver HMI device 3a may be a vibration actuator that applies vibrations to the driver's hands via the steering wheel 22, or a massage seat provided as the driver's seat 20 and / or the passenger seat 21 that applies stimulation to the driver's body part, such as by patting, kneading, pressing, or vibrating, by hitting, kneading, pressing, or vibrating.

[0014] The host vehicle 2 also has an accelerator pedal, a brake pedal, a turn signal light, a steering wheel, and the like. 22 The vehicle controller 5 detects the operation state of the steering controllers such as the steering wheel, and also detects the motion state of the host vehicle 2 such as the vehicle speed, acceleration, and yaw rate.

[0015] The host vehicle 2 further includes an object sensor 7 provided at the front of the body of the host vehicle 2, and a risk detection device 6 that detects the presence of a risk of contact between the host vehicle 2 and an object (including traffic participants) in the surrounding environment of the host vehicle 2. The object sensor 7 may be, for example, one or more cameras, radar, lidar, and / or sonars distributed over the body of the host vehicle 2.

[0016] The risk detection device 6 calculates a risk position, which is a position where contact between the host vehicle 2 and an object is highly likely to occur, and a risk level, which is the degree of likelihood of the contact occurring at the risk position. In this embodiment, the risk detection device 6 uses THW (Time to Headway), which is obtained by dividing the inter-vehicle distance to a preceding vehicle traveling in front of the host vehicle 2 by the vehicle speed of the host vehicle 2, as a risk assessment index for assessing the risk level. The inter-vehicle distance can be calculated, for example, from a sensor output from the object sensor 7. The risk detection device 6 calculates the risk level, for example, as a function that monotonically increases as the THW decreases. More specifically, the risk level can be given, for example, as a function that monotonically increases with respect to the reciprocal of the THW.

[0017] Alternatively, the risk detection device 6 may identify a risk position where there is a high possibility of contact between the vehicle 2 and an object, and calculate a risk level at the risk position, based on, for example, the sensor output of the object sensor 7, positioning data acquired from a GPS device (not shown), and map information. The map information may include information on road shapes such as intersections, straight roads, and curves, traffic infrastructure such as traffic lights, and building locations.

[0018] The risk detection device 6 may predict the movement of an object and the host vehicle 2 based on, for example, the position, direction of movement, and speed of an object in the surrounding environment, the position, direction of movement, and speed of the host vehicle 2, the status of traffic lights, etc., according to conventional technology. The risk detection device 6 may then calculate a risk position and risk level from the closest position between the host vehicle 2 and the object and the distance between the host vehicle 2 and the object at that position. According to conventional technology, when predicting the movement of an object, the risk detection device 6 may take into account the lighting status of the vehicle's turn signal lights and brake lights if the object is a vehicle, or the direction of the pedestrian's face if the object is a pedestrian. Similarly, when predicting the movement of the host vehicle 2, the risk detection device 6 may take into account the lighting status of the host vehicle's turn signal lights and brake lights obtained from the vehicle control device 5, or, if a navigation device (not shown) is providing route guidance, may take into account the route being guided.

[0019] In addition to detecting the risk of contact between the vehicle 2 and objects that are actually detected in the environment surrounding the vehicle 2, the risk detection device 6 may also infer and detect the risk of contact with objects that have not yet been detected but may appear (such as virtual vehicles or pedestrians) based on information about the possibility of contact from others (e.g., other vehicles) obtained via a vehicle communication network including so-called V2X communication, and / or based on the visibility at intersections, the number of accidents, etc.

[0020] The alert device 4 includes a processor 10 and a memory 11. The memory 11 is configured, for example, by a volatile and / or non-volatile semiconductor memory and / or a hard disk drive. The processor 10 is, for example, a computer including a CPU. The processor 10 may be configured to include a ROM in which a program is written, a RAM for temporarily storing data, and the like. The processor 10 includes, as functional elements or units, a risk identification unit 13 and a notification unit 14.

[0021] These functional elements of the processor 10 are realized, for example, by the processor 10, which is a computer, executing a program 12 stored in a memory 11. The program 12 can be stored in any computer-readable storage medium. Alternatively, all or part of the functional elements of the processor 10 can be configured by hardware including one or more electronic circuit components.

[0022] The risk identification unit 13 identifies, at predetermined time intervals, a risk level indicating the degree of possibility of contact between the vehicle 2 and an object present in the surrounding environment of the vehicle 2. In this embodiment, the risk identification unit 13 acquires the calculation result of the risk level from the risk detection device 6 and identifies the current risk level.

[0023] The notification unit 14 notifies the driver and passengers of the presence of a risk of contact between the vehicle 2 and an object via the HMI device 3, according to the current risk level identified by the risk identification unit 13.

[0024] In this embodiment, particularly, when the risk level exceeds a first threshold, the notification unit 14 executes a first notification to notify the driver of the existence of a contact risk via the driver's HMI device 3a. Furthermore, when the risk level exceeds a second threshold indicating a risk level higher than the first threshold, or when a predetermined time has elapsed since the execution of the first notification, the notification unit 14 executes a second notification to notify the passenger of the existence of a contact risk via the passenger's HMI device 3b.

[0025] As a result, in the attention warning system 1, when a risk of contact between the vehicle 2 and an object occurs, the driver is notified but not the passengers, allowing the driver to concentrate on taking initial maneuvers to avoid the danger without worrying about the passengers. On the other hand, since the passengers are notified when the risk level rises or a predetermined time has passed since the occurrence of the risk of contact, the passengers can take various measures, such as preparing for changes in acceleration (for example, lateral swaying of the vehicle body) that may occur due to emergency maneuvering, or alerting the driver, thereby providing a sense of security.

[0026] The notification unit 14 also executes a third notification when the risk level exceeds a third threshold that is greater than the first threshold and the second threshold, by using the driver's HMI device 3a and the passenger's HMI device 3b to simultaneously notify the driver and passenger of the existence of a contact risk. This means that if the risk level increases further and there is a high possibility that emergency maneuvers will be necessary, the driver and passengers will be notified simultaneously, allowing all occupants to be urged to take the necessary measures without delay.

[0027] It is preferable that the manner of notification in the third notification be different from the manner of notification in the first notification and the second notification. For example, the intensity of the notification in the third notification can be different from the intensity of the notification in the first notification and the second notification. This makes it possible to clearly notify the occupants of the host vehicle 2 that a high-risk situation has occurred, in which the risk level exceeds a third threshold that is greater than the first and second thresholds.

[0028] In this embodiment, the strength of the notification given to the driver and passenger by the driver HMI device 3a and passenger HMI device 3b, which are the electric seat belts, is the magnitude of the tension of the respective seat belts. As a result, the electric seat belts are used as the driver HMI device 3a and the passenger HMI device 3b, and the tactile stimuli are given to each passenger from the seat belt of each seat, and the notification of the contact risk can be conveyed individually to each passenger without adding any special equipment for the passengers. Furthermore, with the above configuration, the driver and passengers can recognize in a realistic manner that the risk level has increased by the strength of the tactile stimuli they receive from their respective seat belts.

[0029] Next, the operational procedure of the attention calling system 1 will be described. 3 is a flowchart showing the procedure of the processing of the attention method executed by the processor 10, which is a computer of the attention device 4 constituting the attention system 1. This processing is repeatedly executed at predetermined time intervals.

[0030] When the process starts, the risk identification unit 13 first acquires from the risk detection device 6 information on whether or not there is an object (hereinafter referred to as a "possible contact object") in the environment surrounding the vehicle 2 that may come into contact with the vehicle 2, and information on the risk level of the possible contact object (S100). As described above, the process shown in FIG. 3 is repeatedly executed at predetermined time intervals, so the risk identification unit 13 repeatedly acquires, at predetermined time intervals, the presence or absence of a possible contact object and the risk level of the object in step S100. Here, step S100 corresponds to the risk identification step in the present disclosure. Furthermore, steps S102 to S124 described below correspond to the notification step in the present disclosure.

[0031] Next, the notification unit 14 determines whether or not there is an object in the surrounding environment that may come into contact with the vehicle 2, based on the information acquired by the risk identification unit 13 from the risk detection device 6 (S102). If there is no object that may come into contact with the vehicle 2 (S102, NO), the notification unit 14 terminates the first notification, second notification, or third notification if it has issued these notifications (S106), and ends this process.

[0032] On the other hand, if an object that may come into contact with the vehicle 2 is present in the surrounding environment (YES in S102), the notification unit 14 determines whether the risk level is greater than the first threshold value (S104). If the risk level is equal to or less than the first threshold value (NO in S104), the notification unit 14 proceeds to step S106.

[0033] On the other hand, if the risk level exceeds the first threshold (S104, YES), the notification unit 14 determines whether the first notification is being executed (S108). If the first notification is not being executed (S108, NO), the notification unit 14 starts executing the first notification (S110) and ends this process. As described above, the first notification refers to a notification of the existence of a risk of contact between the host vehicle 2 and an object that is given to the driver by the driver HMI device 3a.

[0034] On the other hand, if the first notification is being executed (S108, YES), the notification unit 14 determines whether or not a predetermined time has elapsed since the start of execution of the first notification (S112). If the predetermined time has elapsed since the start of execution of the first notification (S112, YES), the notification unit 14 proceeds to step S116. On the other hand, if the predetermined time has not elapsed since the start of execution of the first notification (S112, NO), the notification unit 14 determines whether or not the risk level is greater than a second threshold (S114). If the risk level is equal to or less than the second threshold (S114, NO), the notification unit 14 terminates this process.

[0035] On the other hand, if the risk level is greater than the second threshold (S114, YES), the notification unit 14 determines whether the second notification is being executed (S116). If the second notification is not being executed (S116, NO), the notification unit 14 starts the execution of the second notification (S118) and ends this process. As a result, when a predetermined time has elapsed since the start of the execution of the first notification, or when the risk level exceeds the second threshold before that, the second notification is started if it has not been executed. Note that, as described above, the second notification refers to a notification of the existence of a contact risk that is given to a passenger by the passenger HMI device 3b.

[0036] On the other hand, if the second notification is being executed in step S116 (S116, YES), the notification unit 14 determines whether the risk level is greater than the third threshold (S120). If the risk level is equal to or less than the third threshold (S120, NO), the notification unit 14 ends this process. On the other hand, if the risk level is greater than the third threshold (S120, YES), the notification unit 14 determines whether the third notification is being executed (S122).

[0037] If the third notification is not being executed (S122, NO), the notification unit 14 starts executing the third notification (S124) and ends this process. On the other hand, if the third notification is being executed (S122, YES), the notification unit 14 ends this process.

[0038] [Other embodiments] In the above-described embodiment, the reciprocal of the THW with respect to the preceding vehicle is used as an example of the risk level. However, the risk level may be any parameter indicating the degree of risk of contact between the host vehicle 2 and an object. Also, a risk assessment index such as THW may be used directly instead of the risk level. However, depending on the risk assessment index, a decrease in its value may correspond to an increase in the risk level. In such a case, instead of determining whether the risk level exceeds the first threshold, the second threshold, or the third threshold, it is sufficient to determine whether the risk assessment index has fallen below a value corresponding to the first threshold, the second threshold, or the third threshold.

[0039] For example, the shorter the inter-vehicle distance or the faster the vehicle speed of the host vehicle 2, the smaller the value of THW becomes, and since the possibility of contact between the preceding vehicle and the host vehicle 2 increases, a decrease in the value of THW corresponds to an increase in the risk level. Therefore, when THW is used instead of the risk level, it is possible to determine whether THW has fallen below a value corresponding to the first threshold, second threshold, or third threshold, and then issue the first notification, second notification, or third notification described above.

[0040] In addition, in the above-described embodiment, the timing of outputting the notification to the passenger in the passenger HMI device 3b is delayed relative to the timing of outputting the notification to the driver in the driver HMI device 3a, but the timing of outputting the notification can also be made different between the passenger HMI devices 3b.

[0041] For example, when the second notification is made, first, a notification is output to the passenger in the passenger seat by the passenger HMI device 3b provided in the passenger seat (i.e., the passenger seat 21 arranged next to the driver's seat 20), and then, after a predetermined time has passed, a notification is output to the corresponding passenger by the passenger HMI device 3b in a seat other than the passenger seat (for example, a rear seat). As a result, following the notification to the driver, first, one of the passengers SelfThe notification is output to the passenger in the front passenger seat, who can easily see the scene ahead of the vehicle 2, so the passenger in the front passenger seat can quickly give advice to the driver and support the driver.

[0042] The present invention is not limited to the configurations of the above-described embodiments, and can be implemented in various forms without departing from the spirit of the present invention.

[0043] [Configuration supported by the above embodiment] The above-described embodiment supports the following configurations.

[0044] (Configuration 1) An attention warning system including a plurality of HMI devices that notify a driver and other passengers aboard a vehicle, and an attention warning device that notifies the driver and the passengers by the HMI devices of the possibility of contact between the vehicle and an object, wherein the attention warning device includes a risk identification unit that identifies a risk level indicating the degree of possibility of contact between the vehicle and an object present in the surrounding environment of the vehicle, and a notification unit that notifies the driver and the passengers by the HMI devices of the existence of a risk of contact between the vehicle and the object in accordance with the risk level. wherein the plurality of HMI devices include a driver's HMI device that exclusively notifies the driver, and a passenger's HMI device that exclusively notifies the passenger, and the notification unit executes a first notification by the driver's HMI device to notify the driver of the existence of the contact risk when the risk level exceeds a first threshold, and executes a second notification by the passenger's HMI device to notify the passenger of the existence of the contact risk when the risk level exceeds a second threshold that is higher than the first threshold, or when a predetermined time has elapsed since executing the first notification. According to the warning system of configuration 1, when a risk of contact between the vehicle and an object occurs, the driver is notified but not the passengers, so the driver can concentrate on taking initial action to avoid the danger without worrying about the passengers. On the other hand, since the passengers are notified when the risk level increases or a predetermined time has passed since the occurrence of the risk of contact, the passengers can take various measures, such as preparing for changes in acceleration that may occur due to emergency maneuvers or warning the driver, and can therefore feel at ease.

[0045] (Configuration 2) The warning system described in Configuration 1, wherein the notification unit executes a third notification by the driver's HMI device and the passenger's HMI device to simultaneously notify the driver and the passenger of the existence of the risk of contact when the risk level exceeds a third threshold that is greater than the first threshold and the second threshold. According to the warning system of configuration 2, when the risk level becomes even higher and the possibility of emergency maneuvering becoming necessary increases, the driver and passengers are notified simultaneously, so that all passengers can be urged to take the necessary measures without delay.

[0046] (Configuration 3) The alert system according to Configuration 2, wherein the intensity of the third notification is greater than the intensity of the first notification and the second notification. According to the warning system of the third configuration, a high-risk situation in which the risk level exceeds a third threshold, which is greater than the first and second thresholds, is notified to the driver's own vehicle. Both The passengers can be clearly notified.

[0047] (Configuration 4) An attention warning system described in any of configurations 1 to 3, wherein the driver's HMI device and the passenger's HMI device are electric seat belts provided in the driver's seat and a seat other than the driver's seat of the vehicle, respectively, that change the tension of the seat belt of the corresponding seat to notify the person sitting in that seat. According to the warning system of configuration 4, the driver and passengers can be notified of the risk of contact by tactile stimulation from the seat belt without adding any special equipment.

[0048] (Configuration 5) An attention warning system as described in Configuration 4, wherein the strength of the notification given to the driver and the passenger by the driver's HMI device and the passenger's HMI device, which are the electric seat belts, is the magnitude of the tension of the seat belts. According to the warning system of configuration 5, the driver and passengers can be made aware of the increased risk level in a realistic manner by the intensity of the tactile stimulation received from the seat belt.

[0049] (Configuration 6) An attention warning method performed by a computer of an attention warning system, comprising: a risk identification step of identifying a risk level for an object present in the surrounding environment of the vehicle, indicating the degree of possibility of contact between the vehicle and the object; and a notification step of notifying a driver and passengers of the vehicle by an HMI device provided in the vehicle of the existence of a risk of contact between the vehicle and the object according to the risk level, wherein in the notification step, when the risk level exceeds a first threshold, a first notification is executed by a driver HMI device that exclusively notifies the driver to notify the driver of the existence of the contact risk, and when the risk level exceeds a second threshold that is higher than the first threshold, or when a predetermined time has elapsed since the execution of the first notification, a second notification is executed by a passenger HMI device that exclusively notifies the passenger to notify the passenger of the existence of the contact risk. composition 6 According to this warning method, when a risk of contact with an object around the vehicle occurs, the driver is notified and not the passengers, so the driver can concentrate on taking the initial action to avoid the danger without feeling uncomfortable about the passengers. On the other hand, the passengers are notified when the risk level rises or a predetermined time has passed since the occurrence of the risk of contact, so the passengers can take the initial action to avoid the danger. twistVarious measures can be taken, such as preparing for possible changes in acceleration or alerting the driver, providing a sense of security. [Explanation of symbols]

[0050] 1...attention warning system, 2...own vehicle, 3...HMI device, 3a...driver's HMI device, 3b...passenger's HMI device, 4...attention warning device, 5...vehicle control device, 6...risk detection device, 7...object sensor, 10...processor, 11...memory, 12...program, 13...risk identification unit, 14...notification unit, 20...driver's seat, 21...passenger seat.

Claims

1. a plurality of HMI devices that notify a driver and other passengers in the vehicle; an attention alert device that notifies the driver and the passengers by the HMI device that there is a possibility of contact between the vehicle and an object; An attention warning system comprising: The attention-calling device a risk identification unit that identifies a risk level indicating a degree of possibility of contact between an object present in the surrounding environment of the host vehicle and the object; a notification unit that notifies the driver and the passenger of the existence of a risk of contact between the vehicle and an object by the HMI device according to the risk level; Equipped with the plurality of HMI devices include a driver HMI device that exclusively notifies the driver, and a passenger HMI device that exclusively notifies the passenger, The notification unit When the risk level exceeds a first threshold, a first notification is executed by the driver HMI device to notify the driver of the existence of the contact risk; when the risk level exceeds a second threshold value that is greater than the first threshold value, or when a predetermined time period has elapsed since the first notification was issued, a second notification is issued by the passenger HMI device to notify the passenger of the existence of the contact risk; When the risk level exceeds a third threshold that is greater than the first threshold and the second threshold, a third notification is executed by the driver HMI device and the passenger HMI device to simultaneously notify the driver and the passenger of the existence of the contact risk. Attention warning system.

2. The third notification has a notification intensity greater than the first notification and the second notification. The warning system according to claim 1 .

3. The driver's HMI device and the passenger's HMI device are electric seat belts provided in the driver's seat and a seat other than the driver's seat of the vehicle, respectively, and change the tension of the seat belts of the corresponding seats to notify the person sitting in the seat. The warning system according to claim 1 or 2.

4. the strength of the notification given to the driver and the passenger by the driver HMI device and the passenger HMI device, which are the electric seat belts, is the magnitude of the tension of the seat belts; The warning system according to claim 3 .

5. An attention method performed by a computer of an attention system, a risk identification step of identifying a risk level indicating a degree of possibility of contact between an object present in the surrounding environment of the host vehicle and the object; a notification step of notifying a driver and a passenger of the host vehicle of the existence of a risk of contact between the host vehicle and an object by an HMI device provided in the host vehicle according to the risk level; and In the notification step, When the risk level exceeds a first threshold, a first notification is executed by a driver HMI device that exclusively notifies the driver of the existence of the contact risk; When the risk level exceeds a second threshold value that is greater than the first threshold value, or when a predetermined time has elapsed since the first notification was made, a second notification is made to the passenger by an HMI device for the passenger that exclusively makes notifications to the passenger, to notify the passenger of the existence of the contact risk; When the risk level exceeds a third threshold that is greater than the first threshold and the second threshold, a third notification is executed by the driver HMI device and the passenger HMI device to simultaneously notify the driver and the passenger of the existence of the contact risk. How to get attention.

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