JP5321371B2 - Vehicle alert device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an attention attracting device effectively attracting attention of a driver to a moving object by using information about the moving object acquired through communication. <P>SOLUTION: An HMI control part 25 makes a display 31 show an attention attracting display 53 when information acquired by a light beacon communication machine 11, a communication machine 12 between a road and a vehicle, and a communication machine 13 between vehicles show a possibility of contact between the moving object and an own vehicle 100. While the attention attracting display 53 is displayed, the HMI control part 25 makes an attention attracting history display 54 having a lower attention attracting degree than the attention attracting display 53 displayed for at least a predetermined period, if it is determined that the information obtained by the communication shows no possibility of contact with the moving object. In this way, even if it is determined that the information obtained by the communication show no possibility of contact, reduction in safety consciousness of the driver is prevented, and attention of the driver is attracted more effectively. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a vehicle alert device, and more particularly, to a vehicle alert device that alerts a driver of a host vehicle to a moving object based on information about a moving object outside the host vehicle obtained by communication.

  Based on information acquired by wireless communication with an optical beacon or the like, a technique for improving the safety of driving a car has been proposed. When information about other vehicles is acquired by wireless communication, there is an advantage that it is not necessary to mount a special sensor such as a radar or a camera on the own vehicle. In addition, there is an advantage that information on other vehicles can be acquired even at an intersection with a poor visibility from the host vehicle. For example, Patent Literature 1 discloses a vehicle driving support apparatus that notifies a driver of vehicle information of another vehicle acquired via wireless communication, and whether or not the host vehicle is approaching an intersection with poor visibility. If it is determined that the host vehicle is approaching the intersection, it is determined whether the speed of the host vehicle is equal to or lower than a predetermined vehicle speed. If the host vehicle speed is determined to be lower than the predetermined vehicle speed, wireless communication is performed. An apparatus is disclosed in which vehicle information of another vehicle acquired via the vehicle is notified to the driver and the vehicle information of the other vehicle is not notified to the driver when it is determined that the speed of the host vehicle is higher than a predetermined vehicle speed.

JP 2007-141114 A

  By the way, in the technology as described above, when a directional communication medium such as an optical beacon is used, information obtained by wireless communication is transient and cannot be updated. . For example, assume a situation where the host vehicle 100 makes a right turn at an intersection as shown in FIG. Alternatively, a situation is assumed in which the host vehicle 100 enters a road with a large amount of traffic on a T-shaped road with a temporary stop restriction as shown in FIG. In such a case, the other vehicle 200 is detected by the monitoring sensor 400. Information about the other vehicle 200 detected by the monitoring sensor 400 is processed by the center. Information about the other vehicle 200 processed by the center is transmitted to the host vehicle 100 by the roadside optical beacon transmitter 300. Based on the information about the other vehicle 200 received from the optical beacon transmitter 300, the driver of the own vehicle 100 uses an alarm sound from a buzzer or a speaker or a display about the possibility of contact between the other vehicle 200 and the own vehicle 100. The display screen alerts you.

  In such a system, as shown in FIG. 3 and FIG. 5, when the own vehicle 100 is within the communication range 302 of the optical beacon transmitter 300, the own vehicle 100 moves from the optical beacon transmitter 300 to the other vehicle 200. It is possible to acquire the information. However, as shown in FIGS. 4 and 6, after the own vehicle 100 moves from the communication range 302 of the optical beacon transmitter 300, information about the other vehicle 200 cannot be newly acquired from the optical beacon transmitter 300. For this reason, after the own vehicle 100 moves from the communication range 302, the information about the other vehicle 200 cannot be updated. For this reason, the accuracy of the information about the other vehicle 200 decreases with the passage of time.

  When it is determined that there is no possibility of contact between the other vehicle 200 and the host vehicle 100 based on the information about the other vehicle 200 with reduced accuracy, the contact between the other vehicle 200 and the host vehicle 100 is actually possible. Despite the nature, the driver is not alerted to the possibility of contact. Therefore, the driver may have an illusion that safety is ensured despite the possibility of contact with the other vehicle 200. In this case, the alerting sound and the display screen disappear. In particular, at an intersection with poor visibility, there is a possibility of inadvertently prompting an intersection. Therefore, if the driver overly trusts or relies on the system, the system may instead encourage less secure behavior.

  In road-to-vehicle communication and vehicle-to-vehicle communication using omnidirectional radio waves, the host vehicle 100 can receive and update information on the other vehicle 200 at any time. However, even in such an omnidirectional communication medium, there may be a problem similar to the above in the case of communication failure or detection failure. In particular, in the inter-vehicle communication, there is a problem that the accuracy of information to be acquired is low in each vehicle traveling on the road when there is no system diffusion rate to some extent. As described above, there remains a problem in the technology for acquiring information about other vehicles through communication and calling the driver to be aware of the other vehicles. For this reason, there is a demand for a technique for more effectively alerting the driver to the other vehicle using information on the other vehicle acquired through communication.

  The present invention has been made in consideration of such circumstances, and its purpose is to use information on moving objects acquired by communication to more effectively alert the driver to moving objects. An object of the present invention is to provide a vehicle alerting device.

The present invention provides an information acquisition unit for acquiring moving object information related to a moving object outside the host vehicle through communication, and alerts the driver of the host vehicle to the moving object based on the moving object information acquired by the information acquisition unit. When the moving object information determines that there is a possibility of contact between the moving object and the host vehicle,
When it is determined that there is no possibility of contact between the moving object and the own vehicle from the moving object information when the first alert is given to the driver of the own vehicle and the first alert is given. Is a vehicle alert device that performs a second alert with a lower degree of alert than the first alert to the driver of the host vehicle at least for a predetermined time.

According to this configuration, the information acquisition unit that acquires the communication moving object information about the external of the moving object of the own vehicle, based on the moving object information information acquiring unit has acquired, alert for the mobile object to the driver of the vehicle There is provided a vehicle alert device including an alert unit that performs the following. When it is determined from the moving object information that there is a possibility of contact between the moving object and the host vehicle, the alerting unit performs first alerting to the driver of the host vehicle. As a result, the driver of the host vehicle is alerted to a moving object that may be in contact with the host vehicle. When it is determined from the moving object information that there is no possibility of contact between the moving object and the host vehicle when the first alerting is being performed, the attention calling unit is at least for a predetermined time. A second alert with a lower degree of alert than the first alert is given to the driver of the vehicle. Thereby, even when it is determined that there is no possibility of contact between the moving object and the host vehicle from the moving object information, the driver continues to receive alerts for a predetermined time. For this reason, it is possible to suppress a decrease in safety awareness of the driver. For this reason, it becomes possible to alert the driver to the moving object more effectively.

  In this case, it is preferable that the alerting unit finishes the second alerting after a predetermined specified time has elapsed.

  If the second alert is issued too long after the possibility of contact between the moving object and the host vehicle disappears, the driver will feel bothersome and distrustful with the device. According to this configuration, the alerting unit ends the second alerting after a predetermined specified time has elapsed. For this reason, it is possible to prevent the driver from feeling bothered and distrustful due to the continuous second alerting.

  Further, when it is determined from the moving object information that there is a possibility of contact between the moving object and the host vehicle when the second alerting is being performed, the alerting unit notifies the driver of the own vehicle. It is preferable to perform the first alerting again.

  According to this configuration, when it is determined from the moving object information that there is a possibility of contact between the moving object and the host vehicle during the second alerting, the driver of the host vehicle is Repeat the 1 alert. Accordingly, when the possibility of contact between the moving object and the host vehicle occurs again, it is possible to give appropriate attention to the driver.

  In this case, after the number of times of performing the first alerting again exceeds the predetermined limit number while the second alerting is being performed, the alerting unit performs the second alerting. Even when it is determined from the moving object information that there is a possibility of contact between the moving object and the own vehicle, it is preferable not to perform the first alert to the driver of the own vehicle again. is there.

  If the first alerting is repeated again and again while the second alerting is being performed, the driver will feel bothered and distrustful with the device. According to this structure, after the number of times of performing the first alerting again when the second alerting is performed exceeds the predetermined limit number, the alerting unit receives the second alerting. Even if it is determined that there is a possibility of contact between the moving object and the own vehicle from the moving object information, the first level alert is not performed again to the driver of the own vehicle. . For this reason, it is possible to prevent the driver from feeling troublesome and distrustful due to excessive repetition of the first alerting.

  In this case, the alerting unit may perform the first alerting again after the number of times of performing the first alerting again exceeds the predetermined limit number while performing the second alerting. When it is no longer performed, it is preferable to end the second alerting after the elapse of a predetermined minimum display time.

  If the second alert that is performed after the first alert is completed in a very short time, the driver will feel the second alert as flickering or noisy on the display screen. You will have distrust. According to this configuration, the alerting unit is configured to perform the first alert after the number of times that the first alert has been performed again exceeds the predetermined limit number when the second alert is being performed. When the alerting is not performed again, the second alerting is terminated after a predetermined minimum display time has elapsed. For this reason, the second alerting performed after the first alerting is performed for a sufficient time. For this reason, it is possible to prevent the driver from feeling complicated and distrustful when the second alerting is completed in a very short time.

  In addition, when the period for which the second alert is predicted to be performed is less than or equal to a predetermined time period between the two periods for which the first alert is predicted to be performed, It is preferable to perform the first alert during a period in which the second alert is expected to be performed.

  If the period during which the second alerting is performed during the period during which the first alerting is performed is too short, the vehicle cannot pass through during that period. For this reason, the driver has a sense of complexity and distrust with the apparatus. According to this configuration, when the period during which the second alert is predicted to be performed is less than or equal to the predetermined specified time between the two periods during which the first alert is predicted to be performed. The first alert is performed during a period in which the second alert is expected to be performed. As a result, it is possible to prevent the driver from feeling complicated and distrustful because the period during which the second alert is performed is excessively short.

  In addition, the alerting unit may interrupt the alerting during which it is predicted that no alerting will be performed between the two periods during which either the first alerting or the second alerting is expected to be performed. When the period is equal to or shorter than a predetermined specified time, it is preferable to perform either the first alerting or the second alerting during the alerting interruption period.

  If the period during which the alert is not performed during the period during which the alert is performed is too short, the vehicle cannot be allowed to pass during that period. For this reason, the driver has a sense of complexity and distrust with the apparatus. According to this configuration, the alerting unit is predicted not to perform alerting between two periods in which either the first alerting or the second alerting is expected to be performed. When the alert call suspension period is equal to or shorter than a predetermined specified time, either the first alert call or the second alert call is performed during the alert call suspension period. As a result, it is possible to prevent the driver from feeling uncomfortable and distrustful due to the excessively short period of time when alerting is not performed.

  In addition, when the information acquisition unit cannot update the moving object information after the communication medium for acquiring the moving object information once acquires the moving object information, It is preferable to perform the second alerting after performing the alerting for a predetermined specified time.

  If the communication medium for the information acquisition unit to acquire the moving object information is such that it is impossible to update the moving object information after acquiring the moving object information once, such as an optical beacon, the passage of time At the same time, the accuracy of information decreases. When the driver is alerted that there is a possibility of contact with the moving object based on the information with reduced accuracy, the driver feels bothersome and distrustful with the device. According to this configuration, when the communication unit for the information acquisition unit to acquire the moving object information is once unable to update the moving object information after the information acquisition unit has acquired the moving object information, After the first alerting is performed for a predetermined time, the second alerting is performed. Accordingly, it is possible to prevent the driver from feeling complicated and distrust due to a high level of alerting to the driver based on the information with reduced accuracy.

  In addition, it is preferable that the alerting unit performs the first alerting and the second alerting by changing the color of the screen display.

  According to this configuration, the alerting unit performs the first alerting and the second alerting by changing the color of the screen display. This makes it easier for the driver to visually grasp the difference between the first alerting and the second alerting.

  In addition, it is preferable that the alerting unit performs the first alerting and the second alerting by changing at least one of a sound volume and a frequency.

  According to this configuration, the alerting unit performs the first alerting and the second alerting by changing at least one of the sound volume and frequency. Thereby, the driver can easily grasp the difference between the first alerting and the second alerting by hearing.

  According to the vehicle alert device of the present invention, it is possible to more effectively alert a driver to a moving object by using information on the moving object acquired through communication.

It is a block diagram which shows the structure of the alerting device for vehicles which concerns on 1st Embodiment. It is a flowchart which shows operation | movement of the alerting device for vehicles which concerns on 1st Embodiment. It is a top view which shows the state which can acquire information from an optical beacon at the time of the right turn in an intersection. It is a top view which shows the state which cannot acquire information from an optical beacon at the time of the right turn in an intersection. It is a top view which shows the state which can acquire information from an optical beacon in T-junction with temporary stop regulation. It is a top view which shows the state which cannot acquire information from an optical beacon in T-junction with temporary stop regulation. It is a figure which shows the display screen where only the map display was displayed without the alerting window being displayed. It is a figure which shows the display screen where the alerting display was displayed in the alerting window. It is a figure which shows the display screen where the alerting history display was displayed in the alerting window. It is a flowchart which shows the operation | movement at the time of acquiring information by the optical beacon of the alerting device for vehicles which concerns on 2nd Embodiment. It is a flowchart which shows the operation | movement at the time of acquiring information by communication by the electromagnetic wave of the vehicle alert device which concerns on 2nd Embodiment. It is a flowchart which shows the operation | movement at the time of setting the alerting execution time which concerns on 3rd Embodiment. It is a flowchart which shows the operation | movement at the time of setting the alerting history display time which concerns on 3rd Embodiment. (A)-(D) show alerting execution time, alerting history display time and display pause time, (A) is a conventional device, (B) is the first and second embodiments, (C) and (D) is a figure which shows 3rd Embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a vehicle alert device according to the present invention will be described with reference to the drawings.

  A vehicle alert device 1 of the first embodiment shown in FIG. The vehicle alert device 1 is a device for alerting the driver of the host vehicle 100 to the moving object based on information about the moving object such as the other vehicle 200 outside the host vehicle 100 acquired by communication. . In the vehicle alert device 1, an ECU (Electronic Control Unit) 20 that controls the entire device is connected to three types of communication devices: an optical beacon receiver 11, a road-to-vehicle communication device 12, and a vehicle-to-vehicle communication device 13. .

  The optical beacon receiver 11 is a device for receiving information related to a moving object outside the host vehicle 100 transmitted from the roadside optical beacon transmitter 300 by directional short-range communication. The road-to-vehicle communication device 12 is a device for receiving information related to a moving object outside the host vehicle 100 transmitted from a facility such as a roadside center by non-directional radio wave communication. The inter-vehicle communication device 13 is a device for receiving information related to the other vehicle from the other vehicle 200 on which the similar inter-vehicle communication device 13 is mounted. The road-to-vehicle communication device 12 and the vehicle-to-vehicle communication device 13 can be shared by one communication device.

  A global positioning system (GPS) -ECU 14 and a map database 15 are connected to the ECU 20. The GPS-ECU 14 is for detecting the current position and the traveling direction of the host vehicle 100 by receiving signals from a plurality of GPS satellites with a GPS receiver. Further, the map database 15 stores map information of each point and information on roadside facilities.

  The ECU 20 is connected to sensors and switches such as a vehicle speed sensor 16, a shift position sensor 17, a brake lamp SW18, and a blinker SW19. The vehicle speed sensor 16 is a sensor for detecting the vehicle speed of the host vehicle 100 from the rotational speed of the axle. The shift position sensor 17 is a sensor for detecting a gear selected by an operation of a driver of the transmission of the host vehicle 100. The brake lamp SW18 is a switch for turning on a brake lamp at the rear of the host vehicle 100 when the host vehicle 100 is braked.

  The ECU 20 includes a communication control unit 21, a transmission signal processing unit 22, a reception data processing determination unit 23, a driving support calculation unit 24, and an HMI control unit 25. The communication control unit 21 is a part that controls communication by the optical beacon signal device 11, the road-vehicle communication device 12, and the vehicle-vehicle communication device 13. The transmission signal processing unit 22 is a part for processing information related to the host vehicle 100 such as the position of the host vehicle 100 transmitted from the inter-vehicle communication device 13, vehicle speed, presence / absence of a brake operation, and the like into a transmittable form.

  The received data processing determination unit 23 compares the data received by the optical beacon signal device 11, the road-to-vehicle communication device 12 and the vehicle-to-vehicle communication device 13 with the data acquired from the GPS-ECU 14 and the map database 15, and corrects each other's information. This is the part where the map matching process is performed. The reception data processing determination unit 23 is a part for estimating a driver's operation based on information obtained from sensors and switches such as the vehicle speed sensor 16, the shift position sensor 17, the brake lamp SW18, and the blinker SW19.

  The driving support calculation unit 24 uses the data received by the optical beacon signal device 11, the road-to-vehicle communication device 12, and the vehicle-to-vehicle communication device 13, and the data acquired from the GPS-ECU 14 and the map database 15. Is a part for performing service area determination for determining whether or not the service area exists. Further, the driving support calculation unit 24 is a part for determining the possibility of contact between the own vehicle 100 and a moving object such as the other vehicle 200. In addition, the driving support calculation unit 24 is a part for performing calculation for executing a driving support algorithm using information obtained by communication described later.

  The HMI (Human Machine Interface) control unit 25 is a part that determines a warning execution condition as to whether or not to execute a warning display described later. Moreover, the HMI control unit 25 is a part that determines display switching between an alert display and an alert history display, which will be described later, based on the presentation time, the number of repetitions, and the like. The HMI control unit 25 is a part for determining whether or not to end the alert display and alert history display.

  A display 31 and a speaker / buzzer 32 are connected to the ECU 20. As the display 31, a display for a navigation system or a liquid crystal display in a meter can be applied. The display 31 displays a warning display and a warning history display described later on the display screen while changing the display color based on a signal from the HMI control unit 25 of the ECU 20. Further, the speaker / buzzer 32 displays a warning display and a warning history display, which will be described later, while changing the volume and frequency based on a signal from the HMI control unit 25 of the ECU 20.

  An accelerator control unit 33 and a brake control unit 34 are connected to the ECU 20. Each of the accelerator control unit 33 and the brake control unit 34 controls the accelerator amount and the brake amount of the host vehicle 100 based on a signal from the driving support calculation unit 24 of the ECU 20.

  Hereinafter, operation | movement of the alerting device 1 for vehicles of this embodiment is demonstrated based on the flowchart of FIG. In the following description, as shown in FIG. 3, it is assumed that the host vehicle 100 makes a right turn at an intersection. The own vehicle 100 uses the road-side optical beacon transmitter 300 or information processing using non-directional radio waves for information on moving objects that may come into contact with the approaching other vehicle 200 or the own vehicle 100 such as a pedestrian. It may be acquired by road-to-vehicle communication with a center or the like, or vehicle-to-vehicle communication with another vehicle 200 or the like.

  In the present embodiment, there is no limitation on the method of selecting communication means when information about a moving object can be obtained from the plurality of communication means, but data obtained from a single communication means is used for each moving object and accident type. Alerts shall be implemented. For example, at the same intersection, priority is given to the data obtained by the inter-vehicle communication for the other vehicle 200 that is an oncoming straight vehicle, and for the crossing pedestrian, the data obtained by the road-to-vehicle communication using non-directional radio waves. Priority will be given and attention will be given to the data. Further, in the present embodiment, not only the contact between the right-turn vehicle and the opposite straight vehicle as shown in FIG. 3 but also all assumed accident types are targeted.

  As shown in FIG. 2, the system of the vehicle alert device 1 starts operating, and information about the other vehicle 200 is acquired by the optical beacon communication device 11, the road-to-vehicle communication device 12, and the vehicle-to-vehicle communication device 13. (S11). The HMI control unit 25 of the ECU 20 determines whether or not the alert condition is satisfied (S12). The alert condition in this case is based on the approach of the other vehicle 200 to the service area (intersection in the example of FIG. 3), the TTC (Time To Collision) between the other vehicle 200 and the host vehicle 100, and the like. And there is a possibility of contact with the host vehicle 100. When the alert condition is not satisfied (S12) and the own vehicle 100 passes through the intersection which is the service area (S13), the ECU 20 ends the process.

  When the alerting condition is satisfied (S12), the HMI control unit 25 shifts the display on the display 31 to the alerting screen (S13). In this case, the HMI control unit 25 displays the display screen 50 of the display 31 on which the map display 51 as shown in FIG. 7 is displayed on the entire surface, and the alert display 53 in the alert window 52 as shown in FIG. Switch to the displayed display. The alert display 53 in this case can be, for example, a chromatic color that can easily attract the driver's attention. At the same time, the HMI control unit 25 causes the speaker / buzzer 32 to output a sound with a high volume and a high frequency and an alarm.

  When the host vehicle 100 passes through the service area (S15), the HMI control unit 25 ends the alert display 53 and returns the display screen 50 to a screen that displays only the map display 51 shown in FIG. 7 (S24). .

The HMI control unit 25 of the ECU 20 determines whether or not a condition for shifting to the alerting history screen is satisfied (S16). The alerting condition in this case is satisfied by satisfying all the following conditions (1) to (3).
(1) The above warning display 53 is being implemented.
(2) The communication data includes information that the other vehicle 200 is not detected, the communication data does not include the data of the other vehicle 200, and the communication data includes information that the other vehicle 200 has passed the service area. The alerting condition on the other vehicle 200 side is not established.
(3) The own vehicle 100 remains in the service area where the same alert display 53 is performed, that is, the alert condition on the own vehicle 100 side is satisfied.

  When the communication media from which information such as the other vehicle 200 is acquired is the optical beacon communication device 11 and the information cannot be updated (S17), the HMI control unit 25 of the ECU 20 displays a predetermined alert display. On the condition that a specified time (for example, the display time of the green light in the traveling direction of the host vehicle 100 at the intersection) has passed (S18), the display on the display 31 is shifted to the alerting history screen (S19). In this case, the HMI control unit 25 displays the display in which the alert display 53 is displayed in the alert window 52 as shown in FIG. 8 and the alert history display 54 in the alert window 52 as shown in FIG. Switch to the displayed display.

  The alerting history display 54 is desirably displayed in the same place and the same design as the alerting display 53. In addition, the alerting history display 54 is different from the alerting display 53 in the coloring that indicates the dangerous area, point, other vehicle 200, and the like. For example, the alert history display 54 in this case can be an achromatic color having a lower alerting degree to the driver than the alert display 53. For example, the alert display 53 can be displayed in yellow, and the alert history display 54 can be displayed in gray. Alternatively, part or all of the background color of the display screen 50 may be changed. The alerting history display 54 can be a display in which the hue, blinking, enlargement rate, and the like are suppressed as compared with the alerting display 53. At the same time, the HMI control unit 25 causes the speaker / buzzer 32 to output a sound or alarm having a lower volume and a lower frequency than the alert display 53. Alternatively, in the alerting history display 54, no sound or alarm may be output.

  When the host vehicle 100 passes through the service area (S20), the alerting history display 54 is terminated (S24). In addition, when the communication media which acquired information, such as the other vehicle 200, is the optical beacon communication apparatus 11 and the information cannot be updated (S17), the contact between the other vehicle 200 and the host vehicle 100 thereafter. Since no information indicating the possibility of this is obtained, the alert display 53 is not performed again.

  On the other hand, when the communication medium from which the information of the other vehicle 200 or the like has been acquired is the road-vehicle communication device 12 or the vehicle-to-vehicle communication device 13 using non-directional radio waves and the information can be updated (S17). The HMI control unit 25 of the ECU 20 shifts the display on the display 31 to the alerting history screen in the same manner as when the communication medium is the optical beacon communication device 11 (S21). When the own vehicle 100 has not passed through the service area (S22) and the above alert condition is satisfied (S23), the HMI control unit 25 shifts the display on the display 31 to the alert screen again (S14). ). When the host vehicle 100 passes through the service area (S20), the alerting history display 54 is terminated (S24).

  According to the present embodiment, the optical beacon communication device 11, the road-to-vehicle communication device 12, the vehicle-to-vehicle communication device 13 that acquires information related to a moving object such as the other vehicle 200 outside the host vehicle 100 by communication, and these communication devices. Is provided with the vehicle alerting device 1 including the HMI control unit 25 that alerts the driver of the host vehicle 100 to the other vehicle 200 or the like based on the acquired information. The HMI control unit 25 causes the display 31 to display a caution display 53 when it is determined from the information obtained through communication that there is a possibility of contact between the moving object and the host vehicle 100. As a result, the driver of the host vehicle 100 is alerted to a moving object that may be in contact with the host vehicle 100. When it is determined that there is no possibility of contact between the moving object and the host vehicle 100 from the information obtained through communication when the alert display 53 is displayed, the HMI control unit 25 is at least predetermined. For the time, the alerting history display 54 having a lower alerting degree than the alerting display 53 is displayed on the display 31. Thereby, even when it is determined that there is no possibility of contact between the moving object and the host vehicle 100 from the information obtained through communication, the driver continues to receive alerts for a predetermined time. For this reason, it is possible to suppress a decrease in safety awareness of the driver. For this reason, it becomes possible to alert the driver to the moving object more effectively.

  Further, according to the present embodiment, when it is determined that there is a possibility of contact between the moving object and the host vehicle 100 from the information obtained by communication when the alert history display 54 is performed. The HMI control unit 25 causes the display 31 to display the alert display 53 again. Accordingly, when the possibility of contact between the moving object and the host vehicle 100 occurs again, it is possible to give an appropriate alert to the driver.

  When the communication media cannot update the information after acquiring the information once like the optical beacon communication device 11, the accuracy of the information decreases with the passage of time. When the driver is alerted that there is a possibility of contact with the moving object based on the information with reduced accuracy, the driver feels bothersome and distrustful with the device. According to the present embodiment, the HMI control unit 25 displays the alert display 53 for a predetermined specified time when it is impossible to update the information once the communication medium has acquired the information. The alerting history display 54 is displayed. Accordingly, it is possible to prevent the driver from feeling complicated and distrust due to a high level of alerting to the driver based on the information with reduced accuracy.

  Further, according to the present embodiment, the HMI control unit 25 performs the alert display 53 and the alert history display 54 by changing the color of the display screen 50 of the display 31. This makes it easier for the driver to visually grasp the difference between the alert display 53 and the alert history display 54.

  Further, in the present embodiment, when the alert display 53 and the alert history display 54 are respectively displayed, the HMI control unit 25 uses the speaker / buzzer 32 to change the sound volume and frequency of the sound and alarm. Output sound. This makes it easier for the driver to grasp the difference between the alert display 53 and the alert history display 54 by hearing.

  Hereinafter, a second embodiment of the present invention will be described. In the present embodiment, the troublesome feeling and display ambiguity given to the driver due to excessive repetition of the alerting display 53 and the alerting history display 54 are eliminated.

  In the present embodiment, the steps S11 to S17 shown in FIG. 2 are similarly performed by the apparatus having the configuration shown in FIG. When the communication media from which information such as the other vehicle 200 is acquired is the optical beacon communication device 11 and information cannot be updated (S17), as shown in FIG. Then, on the condition that a predetermined time for the predetermined alert display (for example, the display time of the green light at the intersection) has passed (S101), the display on the display 31 is shifted to the alert history screen (S102). In this case, the HMI control unit 25 displays the display in which the alert display 53 is displayed in the alert window 52 as shown in FIG. 8 and the alert history display 54 in the alert window 52 as shown in FIG. Switch to the displayed display.

  The HMI control unit 25 measures the elapsed time from the start of display of the alert history display 54 (S103). The HMI control unit 25 of the ECU 20 determines that the elapsed time from the start of the display of the alert history display 54 is a predetermined time of the alert history display (for example, the display time of a green signal in the traveling direction of the host vehicle 100 at the intersection, or The warning history display 54 is terminated (S24) on the condition that the time until the green signal in the intersection direction of the host vehicle 100 at the intersection is displayed (S104). Even if the elapsed time from the start of display of the alert history display 54 is less than the prescribed time for the alert alert history display (S104), if the vehicle 100 passes through the service area (S105), the alert is issued. The history display 54 is terminated (S24).

  On the other hand, when the communication medium from which the information of the other vehicle 200 or the like has been acquired is the road-vehicle communication device 12 or the vehicle-to-vehicle communication device 13 using non-directional radio waves and the information can be updated (S17). As shown in FIG. 11, the HMI control unit 25 of the ECU 20 determines that the number of times of switching between the alert display 53 and the alert history display on the display screen 50 is a predetermined limit value (for example, normally 3 to 10 times). ) Is determined (S201).

  When the number of times of switching between the alert display 53 and the alert history display 54 on the display screen 50 does not exceed the limit value (S201), the HMI control unit 25 of the ECU 20 indicates that the communication medium is the optical beacon communication device 11. As in the case of, the display on the display 31 is shifted to the alerting history screen (S202).

  The HMI control unit 25 measures the elapsed time from the display start of the alert history display 54 (S203). The HMI control unit 25 of the ECU 20 determines that the elapsed time from the start of the display of the alerting history display 54 is less than the predetermined time of the predetermined alerting history display (S204), and the host vehicle 100 passes the service area. (S205), the alerting history display 54 is terminated (S24). In this case, when the own vehicle 100 does not pass through the service area (S205) and the above-described alerting condition is satisfied (S206), the HMI control unit 25 displays the alerting display 53 and the alerting history display. 1 is added to the number of times the switching is repeated (S207), and the display on the display 31 is shifted again to the alerting screen (S14). When the own vehicle 100 does not pass through the service area (S205) and the above alert condition is not satisfied (S206), the HMI control unit 25 repeats steps S204 to S205.

  On the other hand, when the number of repeated switching between the alert display 53 and the alert history display 54 on the display screen 50 exceeds the limit value (S201), the HMI control unit 25 of the ECU 20 displays the alert history display 54. The minimum display time for display is set (S208). The minimum display time may be about 2 to 3 seconds when the driver does not feel the flickering of the display screen 50 of the display 31. The HMI control unit 25 of the ECU 20 shifts the display on the display 31 to the alerting history screen (S209). Thereafter, since the limit value of the number of repetitions is exceeded, there is no direct transition from the alerting history display 54 to the alerting display 53.

  When the minimum display time has elapsed (S210), or when the elapsed time from the start of display of the alert history display 54 is equal to or longer than the specified time of the alert history display in S204, the HMI control unit 25 of the ECU 20 alerts The history display 54 is terminated (S211). If the initialization condition of the elapsed time from the display start of the alerting history display 54 or the number of repetitions of switching between the alerting display 53 and the alerting history display 54 on the display screen 50 is satisfied (S212), the ECU 20 The HMI control unit 25 initializes the elapsed time or the number of repetitions satisfying the initialization condition to 0 (S213). Thereafter, the steps from S12 are repeated as described above.

  The initialization condition for the elapsed time from the start of display of the alerting history display 54 or the number of repetitions of switching between the alerting display 53 and the alerting history display 54 on the display screen 50 is the size of the intersection and the vehicle 100. It depends on the waiting place. For example, when waiting for a right turn or the like and the host vehicle 100 is at the head of the train near the intersection, it is desirable to initialize the elapsed time and the number of repetitions.

  On the other hand, the warning display 53 is displayed while waiting for a right turn, etc. However, since there are many vehicles waiting for a right turn, the own vehicle 100 cannot pass through the intersection during a single green light display period, and the next green light When the display period is reached, it is desirable not to initialize the elapsed time and the number of repetitions. Also, if you are waiting for a right turn, etc., and your vehicle 100 is just moving slightly in the right turn lane, etc., and you cannot pass through the intersection immediately after starting, and you are likely to remain at the intersection, the elapsed time and number of repetitions It is desirable not to initialize.

  If the alerting history display 54 is displayed for too long after the possibility of contact between the moving object and the host vehicle 100 disappears, the driver will feel bothersome and distrustful with the device. According to the present embodiment, the HMI control unit 25 ends the alerting history display 54 after a predetermined time has elapsed. For this reason, it is possible to prevent the driver from feeling bothered and distrustful because the alerting history display 54 is continuously performed.

  In addition, if the alert display 53 is repeated again and again while the alert history display 54 is being performed, the driver will feel bothersome and distrustful with the device. According to the present embodiment, the HMI control unit 25 displays the alert history display 54 after the number of times the alert display 53 is performed again while the alert history display 54 is performed exceeds a predetermined limit number. Even when it is determined that there is a possibility of contact between the moving object and the host vehicle 100 from the information obtained by communication, the alert display 53 is not displayed again. For this reason, it is possible to prevent the driver from feeling uncomfortable or distrustful due to excessive repetition of the alert display 53.

  If the alert history display 54 performed after the alert display 53 is finished in a very short time, the driver feels that the alert history display 54 is flickering or noisy on the display screen. You will have a feeling. According to the present embodiment, the HMI control unit 25 is after the number of times that the alert display 53 is performed again when the alert history display 54 is performed exceeds the predetermined limit number, and the alert is displayed. When the display 53 is not performed again, the alerting history display 54 is terminated after a predetermined minimum display time has elapsed. For this reason, the alerting history display 54 performed after the alerting display 53 is performed is performed for a sufficient time. For this reason, it is possible to prevent the driver from feeling troublesome and distrustful because the alerting history display 54 ends in a very short time.

  Hereinafter, a third embodiment of the present invention will be described. In the present embodiment, between the two periods in which the alert display 53 is performed, the troublesome feeling and display given to the driver due to the excessively short period during which the alert is not performed and the period during which the alert history display 54 is performed To eliminate ambiguity.

  In the present embodiment, the steps shown in FIG. 2 or FIGS. 10 to 11 are similarly performed by the apparatus having the configuration as shown in FIG. In the connector A between S12 and S14 in FIG. 2, as shown in FIG. 12, the HMI control unit 25 sets an alerting execution time during which the alerting display 53 is performed (S301). The HMI control unit 25 sets a schedule for a period during which the alert display 53 is displayed (hereinafter referred to as ON) and a period during which the alert display 53 is not performed (hereinafter referred to as OFF). A / OFF schedule is created (S302). The OFF period may or may not include a period in which the alert history display 54 is performed after the alert display 53.

  When the time during which the alert display 53 is OFF is less than or equal to a predetermined time (for example, the time during which the vehicle 100 can pass through the intersection due to the size of the intersection, etc.) (S303), the HMI control unit 25 The time for which the alert display 53 is performed is changed so that the OFF time exceeds the specified time (S304). Specifically, the schedule is changed so that the alert display 53 or the alert history display 54 is performed even during the OFF period that is less than the specified time.

  Further, in the present embodiment, in the connector B between S16 and S17 in FIG. 2, as shown in FIG. 13, the HMI control unit 25 sets the alert execution time for the alert history display 54 ( S401). The HMI control unit 25 creates a reminder on / off schedule in which a period during which the alert history display 54 is displayed (hereinafter referred to as “on”) and an OFF period are set (S402).

  When the time when the alerting history display 54 is OFF is less than or equal to a predetermined time (for example, the time that the vehicle 100 can pass through the intersection due to the size of the intersection, etc.) (S403), the HMI control unit 25 The time during which the alerting history display 54 is performed is changed so that the OFF time exceeds the specified time (S404). Specifically, the schedule is changed so that the alerting history display 54 or the alerting display 53 is performed even during an OFF period that is less than or equal to the specified time.

  In the apparatus of Patent Document 1, as shown in FIG. 14A, an ON period in which the alert display 53 is performed and an OFF period in which only the map display 51 is performed without the alert display 53 are set. The ON period is preceded by the time ta with respect to the progress of the other vehicle 200, and a warning display is made. In this case, when the OFF period when the alert display 53 is not performed is a sufficiently long time tb, the host vehicle 100 can pass through the intersection. However, when the OFF period is a short time tc, the host vehicle cannot pass through the intersection within the OFF period, and the driver has a distrust of the apparatus and a complicated feeling of display.

  Therefore, in the present embodiment, as shown in FIG. 14B, the ON period in which the alert display 53 is performed, the on period in which the alert history display 54 is performed, and the alert display 53 is not performed, and only the map display 51 is performed. In the device in which the OFF period is set, as shown in FIG. 14C, the ON period in which the alert history display 54 is performed and the OFF period in which the alert display 53 is not performed and only the map display 51 is performed are predetermined. Is shorter than the specified time, the period is an ON period in which the alert display 53 is performed. Alternatively, as shown in FIG. 14D, when the OFF period in which the alert display 53 is not performed and only the map display 51 is performed is shorter than a predetermined specified time, the alert history display 54 is performed during the period. Period.

  If the period during which the alerting history display 54 is performed during the period during which the alerting display 53 is performed is too short, the host vehicle 100 cannot pass through during that period. For this reason, the driver has a sense of complexity and distrust with the apparatus. According to the present embodiment, when the period during which the alert history display 54 is predicted to be performed is less than or equal to a predetermined specified time between the two periods in which the alert display 53 is predicted to be performed. The HMI control unit 25 performs the alert display 53 during a period in which the alert history display 54 is predicted to be performed. As a result, it is possible to prevent the driver from feeling complicated and distrust due to an excessively short period of the alert history display 54.

  In addition, when the period during which the alerting is not performed during the period during which the alert is performed is too short, the vehicle 100 cannot pass through during that period. For this reason, the driver has a sense of complexity and distrust with the apparatus. According to the present embodiment, the HMI control unit 25 predicts that no alerting is performed between two periods in which either the alerting display 53 or the alerting history display 54 is predicted to be performed. When the OFF period to be performed is equal to or shorter than the predetermined specified time, either the alert display 53 or the alert history display 54 is performed during the OFF period. As a result, it is possible to prevent the driver from feeling uncomfortable and distrustful due to the excessively short period of time when alerting is not performed.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention. For example, in the above embodiment, the screen of the alerting history display 54 gradually fades and becomes darker with the passage of time from the start of the display of the alerting history display 54, and when the specified time has elapsed. A display method in which all the alerting history display 54 disappears can also be adopted. Alternatively, it is possible to adopt a display method in which the color is gradually changed over time at the time of transition from the alert display 53 to the alert history display.

DESCRIPTION OF SYMBOLS 1 ... Vehicle alerting device, 11 ... Optical beacon receiver, 12 ... Road-to-vehicle communication device, 13 ... Vehicle-to-vehicle communication device, 14 ... GPS-ECU, 15 ... Map database, 16 ... Vehicle speed sensor, 17 ... Shift position, DESCRIPTION OF SYMBOLS 18 ... Brake lamp SW, 19 ... Winker SW, 20 ... ECU, 21 ... Communication control part, 22 ... Transmission signal processing part, 23 ... Reception data processing determination part, 24 ... Driving assistance calculating part, 25 ... HMI control part, 31 ... Display, 32 ... Speaker / buzzer, 33 ... Accelerator control unit, 34 ... Brake control unit, 50 ... Display screen, 51 ... Map display, 52 ... Attention window, 53 ... Attention display, 54 ... Attention history display, DESCRIPTION OF SYMBOLS 100 ... Own vehicle, 200 ... Other vehicle, 300 ... Optical beacon transmitter, 302 ... Communication range, 400 ... Monitoring sensor.

Claims (8)

An information acquisition unit for acquiring, through communication, moving object information relating to a moving object outside the host vehicle;
Based on the moving object information acquired by the information acquisition unit, a warning unit that alerts the driver of the host vehicle to the moving object;
With
The alert unit is
When it is determined from the moving object information that there is a possibility of contact between the moving object and the host vehicle, a first alert is given to the driver of the host vehicle,
When it is determined from the moving object information that there is no possibility of contact between the moving object and the host vehicle when the first alerting is being performed, at least the predetermined time There the first note second row alerted of a low degree of caution than arouse the driver of the vehicle,
When it is determined from the moving object information that there is a possibility of contact between the moving object and the host vehicle when the second alert is being performed, the driver of the host vehicle is Reminder 1 again,
After the number of times of performing the first alerting again exceeds a predetermined limit number when the second alerting is being performed, when the second alerting is being performed, Even when it is determined from the moving object information that there is a possibility of contact between the moving object and the host vehicle, the first alert is not issued again to the driver of the host vehicle. Arousing device.   The vehicle alert device according to claim 1, wherein the alert unit finishes the second alert after a predetermined time has elapsed. The alerting unit may be configured to perform the first alerting after the number of times that the first alerting is performed again exceeds a predetermined limit when the second alerting is being performed. when no longer performed again, terminating the second reminder after a predetermined minimum display time, reminder apparatus for a vehicle according to claim 1 or 2. In the alerting unit, the period during which the second alert is predicted to be performed is less than or equal to a predetermined specified time between the two periods during which the first alert is predicted to be performed. 4. The vehicle alert device according to claim 1, wherein the first alert is performed during a period in which the second alert is predicted to be performed. The alerting unit is configured to alert that the alert is predicted not to be performed between two periods in which either the first alert or the second alert is expected to be performed. when the interruption period is equal to or less than the predetermined specified time, the alert interruption period to perform any of the first alert and the second alert, according to any one of claims 1 to 4 Vehicle alert device. When the communication unit for the information acquisition unit to acquire the moving object information is once unable to update the moving object information after the information acquisition unit has acquired the moving object information, The vehicle alert device according to any one of claims 1 to 5 , wherein the second alert is performed after the first alert is performed for a predetermined time. The vehicle alert device according to any one of claims 1 to 6 , wherein the alert unit performs the first alert and the second alert by changing a color of a screen display. . The vehicle according to any one of claims 1 to 7 , wherein the alerting unit performs the first alerting and the second alerting by changing at least one of sound volume and frequency. Warning device for use.

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