JP5109851B2 - Alarm display control device for vehicles - Google Patents

Description

  The present invention relates to a vehicle alarm display control apparatus that performs display control of an alarm display apparatus that displays an alarm for a driver who drives a vehicle.

  There is an alarm display control device that controls display of an alarm display device that displays an alarm to a driver when a traveling vehicle is likely to be off the road. This type of alarm display device avoids problems by displaying an alarm to the driver. However, if the driver views the alarm display too long, it may delay the confirmation of the surroundings of the vehicle and the driving operation. There is.

There is a vehicle display device that prevents such a situation (see, for example, Patent Document 1). This vehicle display device detects the time when the driver is gazing at the screen (alarm display device), and when this time exceeds a predetermined time, the screen display is reduced by reducing the brightness and contrast of the screen. The contents are erased.
JP 2002-274218 A

  By the way, in the display apparatus for vehicles indicated by the above-mentioned patent documents 1, it erases, after displaying a screen display content uniformly until the gaze time when a driver gazes a screen exceeds predetermined time. At this time, there may be a short time until an event to be alarmed, for example, an event in which the vehicle deviates from the traveling path.

  In such a case, in the vehicle display device described in Patent Document 1, the brightness of the screen is displayed although it is desired to return the line of sight to the outside of the vehicle with respect to the driver who has moved the line of sight to the screen. Etc. will not be reduced. As a result, there is a problem that the driver's line-of-sight return may be delayed.

  Accordingly, an object of the present invention is to provide a vehicle alarm display control capable of promptly returning to the line of sight when the driver wants to prompt the line of sight to return after moving the line of sight to the alarm display performed by the alarm display device. To provide an apparatus.

A vehicle alarm display control device according to the present invention that has solved the above problems is a vehicle alarm display control device that performs display control of an alarm display device that displays vehicle alarm information and notifies a driver of the vehicle alarm information. Vehicle behavior acquisition means for acquiring vehicle target travel point calculation means for calculating the target travel point of the vehicle, predicted arrival point calculation means for calculating the predicted arrival point of the vehicle based on the vehicle behavior of the vehicle, and target travel point Target point deviation amount calculating means for calculating a target point deviation amount that is a deviation between the expected arrival point and a display visual margin time that is a time for the driver to visually recognize the alarm display device based on the target point deviation amount a display visible margin time calculating means for calculating, after the elapse of display viewing margin time, and a display control means for performing control for reducing the visual stimulus effect of the alarm display, display visual margin time calculating means, eye More point shift amount is small, it characterized that you calculate long display viewing margin time.

  In the vehicle alarm display control device according to the present invention, the display visual allowance time is calculated based on the target point deviation amount, which is the deviation between the target travel point and the expected arrival point, and the alarm is displayed after the display visual allowance time has elapsed. The visual stimulation effect of the display device is reduced. For this reason, since the strong visual stimulus effect is given from the alarm display device until the display visual recognition allowance time elapses, it is possible to clearly notify the driver of the alarm, and to the driver the gaze to the alarm display device. Can be moved. Further, after the display visual recognition allowance time has elapsed, the visual stimulus effect is reduced. For this reason, when the driver wants to return the line of sight after the driver has moved the line of sight to the alarm display performed by the alarm display device, the line of sight can be promptly returned.

  Note that the visual stimulus effect in the present embodiment may be brightness, blinking speed, or the like. Specifically, when the visual stimulus effect is luminance, the greater the luminance, the stronger the visual stimulus effect. When the visual stimulus effect is blinking, the visual stimulus effect is increased as the blinking speed is faster. Furthermore, the visual stimulus effect can be adjusted by adjusting the brightness increase / decrease and the blinking speed.

  Here, it is possible to obtain an aspect in which the visual stimulus effect is maintained when the line-of-sight direction of the driver after the display visual recognition margin time has elapsed and the acquired line-of-sight direction of the driver is away from the alarm display device.

  When the driver's line-of-sight direction is away from the alarm display device, the driver does not visually recognize the alarm display device. Therefore, even if control for reducing the visual stimulus effect is performed, it does not contribute to the return of the line-of-sight direction. . In this case, the control for reducing the display luminance of the alarm display device is canceled so as to maintain the visual stimulus effect. In this way, the control load can be reduced by releasing the control for reducing the display brightness of the alarm display device.

  Further, the visual stimulus effect may be an aspect in which luminance is used. Thus, the luminance can be suitably set as the visual stimulus effect.

  According to the vehicle alarm display control device of the present invention, it is possible to promptly return the line of sight when the driver wants to return the line of sight after the driver moves the line of sight to the alarm display performed by the alarm display device. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. For the convenience of illustration, the dimensional ratios in the drawings do not necessarily match those described.

  FIG. 1 is a block diagram of a vehicle alarm display control device according to an embodiment of the present invention. As shown in FIG. 1, the vehicle alarm display control device according to the present embodiment includes a road detection sensor 1, a road recognition ECU (Electronic Control Unit) 2, a line of sight detection sensor 3, a line of sight recognition ECU 4, a vehicle behavior sensor 5, and An alarm processing ECU 6 is provided. Further, an alarm display device 7, a buzzer 8, and a vibrator 9 are connected to the alarm processing ECU 6. The travel path recognition ECU 2, the line-of-sight recognition ECU 4, and the alarm processing ECU 6 are all electronic control units including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an input / output port, and the like.

  The travel path detection sensor 1 includes an external imaging camera attached to a front position of the vehicle. The travel path detection sensor 1 images the outside including the travel path of the vehicle with an imaging camera outside the vehicle. The travel path detection sensor 1 transmits the captured image to the travel path recognition ECU 2. The travel path recognition ECU 2 performs image processing on the image transmitted from the travel path detection sensor 1, detects a white line on the road, and detects the travel path of the vehicle from the detected white line. The travel path detection sensor 1 transmits the detected travel path of the vehicle to the alarm processing ECU 6 as travel path information.

  The line-of-sight detection sensor 3 includes a driver imaging camera attached to the vehicle interior. The line-of-sight detection sensor 3 images the driver's face (front) with a driver imaging camera. The line-of-sight detection sensor 3 transmits an image captured by the driver imaging camera to the line-of-sight recognition ECU 4. The line-of-sight recognition ECU 4 performs image processing on the image transmitted from the line-of-sight detection sensor 3 to detect the line of sight of the driver. The line-of-sight recognition ECU 4 transmits the detected line-of-sight direction of the driver to the alarm processing ECU 6 as line-of-sight direction information.

  The vehicle behavior sensor 5 includes a vehicle speed sensor, a steering angle sensor, a yaw rate sensor, and the like. The vehicle behavior sensor 5 transmits the vehicle speed detected by the vehicle speed sensor, the steering angle calculated by the steering angle sensor, the yaw rate detected by the yaw rate sensor, and the like to the alarm processing ECU 6 as vehicle behavior information.

  Whether the alarm processing ECU 6 generates an alarm based on the vehicle travel path information transmitted from the travel path recognition ECU 2, the line-of-sight direction information transmitted from the line-of-sight recognition ECU 4, and the vehicle behavior information transmitted from the vehicle behavior sensor 5. Make a decision. When an alarm is generated, the alarm information is transmitted to the alarm display device 7, the buzzer 8, and the vibrator 9.

  Further, the alarm processing ECU 6 calculates a travel target point deviation amount based on the vehicle travel route information and the vehicle behavior information. The ROM in the alarm processing ECU 6 stores a map indicating the relationship between the travel target point deviation amount and the display visual allowance time, and the display visual recognition is performed with reference to the map stored in the ROM. Determine the spare time.

  Further, the alarm processing ECU 6 determines the display time and display mode of the alarm display to be displayed on the alarm display device 7 based on the determined display visual recognition allowance time, and alerts the alarm information corresponding to the determined display mode and display time. Transmit to the display device 7.

  The alarm display device 7 includes an alarm lamp provided in a meter portion of the vehicle, and displays an alarm when the vehicle is about to leave the traveling path. The alarm display includes a first level that is very likely to be off the road, a second level that is less likely to be off the road, and a third level that is less likely to be off the road than the second level. Is set. In the alarm display device 7, an alarm display corresponding to the first to third levels is displayed on the alarm lamp.

  The buzzer 8 is provided on a speaker in the vehicle, and emits an alarm sound to the driver when alarm information is transmitted from the alarm processing ECU 6. The vibrator 9 is provided on a driver seat in the vehicle, and applies vibration to the driver seat when alarm information is transmitted from the alarm processing ECU 6. The driver seat vibrates to notify the driver of the presence of an alarm.

  Next, a processing procedure of the vehicle alarm display control apparatus according to the present embodiment will be described. FIG. 2 is a flowchart showing a processing procedure of the vehicle alarm display control apparatus according to the present embodiment. As shown in FIG. 2, in the vehicle warning display control device according to the present embodiment, first, the travel path recognition ECU 2 detects the travel path of the vehicle based on the image captured by the outside camera in the travel path detection sensor 1. To do. The travel path recognition ECU 2 transmits travel path information based on the detected travel path of the vehicle to the alarm processing ECU 6. The alarm processing ECU 6 acquires the travel path information transmitted from the travel path recognition ECU 2 (S1).

  Next, the vehicle behavior sensor 5 detects the vehicle speed, steering angle, yaw rate, and the like of the vehicle, and transmits vehicle behavior information based on these detection results to the alarm processing ECU 6. The alarm processing ECU 6 acquires vehicle behavior information transmitted from the vehicle behavior sensor 5 (S2).

  Subsequently, the alarm processing ECU 6 calculates a travel target line of the vehicle based on the travel path information transmitted from the travel path recognition ECU 2 (S3). For example, as shown in FIG. 3, in the alarm processing ECU 6, when information of two white lines WL1 and WL2 that divide the traveling path of the vehicle M is transmitted as traveling path information, these two white lines WL1 , WL2 is always calculated as a travel target line WL.

  When the travel target line WL is calculated, a travel target point deviation amount D is calculated (S4). In calculating the travel target point deviation amount D, a travel target point P2 of the vehicle M after a predetermined time t on the travel target line WL has been calculated.

  Furthermore, after the predetermined time t has elapsed when the vehicle M continues to travel in the current state based on the vehicle speed, the steering angle, and the yaw rate based on the vehicle behavior information transmitted from the vehicle behavior sensor 5, the vehicle An expected arrival point P1 that M is expected to reach is calculated. Based on the difference between the travel target point P2 thus obtained and the predicted arrival point P1, the travel target point deviation amount D is calculated.

  When the travel target point deviation amount D is calculated, it is determined whether or not an alarm is to be executed based on the calculated travel target point deviation amount D and the vehicle behavior information (S5). Here, based on the vehicle speed, the steering angle, the yaw rate and the like in the vehicle behavior information, it is determined whether or not the driver is performing a driving operation toward the travel target point. As a result, when it is determined that the driving operation toward the travel target point is being performed, it is determined that the alarm is not executed, and the process returns to step S1. On the other hand, if it is determined that the driving operation toward the travel target point is not performed, an alarm is executed.

  If it is determined in step S5 that an alarm is to be executed, the display visual recognition allowance time is calculated (S6). The alarm processing ECU 6 stores a map indicating the relationship between the travel target point deviation amount D shown in FIG. In this map, as the travel target point deviation amount D is smaller, the display viewing allowance time is longer.

  When the display visual recognition margin time is calculated, the line-of-sight direction of the driver is acquired based on the image detected by the line-of-sight detection sensor 3 (S7). Then, it is determined whether or not the driver's line-of-sight direction faces the meter (S8). As shown in FIG. 5, the line of sight of the driver H is the first line of sight SA when looking at the road with respect to the line of sight reference SX, and the second line of sight SB when facing the meter direction. Become. Here, the line-of-sight direction of the driver is determined by obtaining the line-of-sight angle with respect to the line-of-sight reference SX. The line-of-sight angle of the first line of sight SA with respect to the line-of-sight reference SX is the angle α, and the line-of-sight angle of the second line of sight SB with respect to the line-of-sight reference SX is the angle β.

  As a result, if it is determined that the line-of-sight direction of the driver is facing the meter direction, meter display control is performed (S9). In the meter display control, display control of an alarm lamp in the meter is performed. For example, as shown in FIG. 6A, it is assumed that the traveling path of the vehicle M is linear and the steering angle of the vehicle M is a neutral position. In this case, since the travel target point P2 and the expected arrival point P1 coincide, the travel target point deviation amount D becomes zero.

  When the travel target point deviation amount D = 0 obtained here is referred to in the map shown in FIG. 4, the display visual recognition allowance time T becomes the maximum allowance time Tm. In this case, the first level is set until the maximum margin time Tm elapses, and the alarm lamp R is blinked as shown in FIG. Then, after the alarm lamp R starts to blink, the second level is set when the maximum margin time Tm has elapsed, and the display mode of the alarm lamp R is changed from the blinking state to the lighting state shown in FIG. After that, when a certain amount of time has elapsed, the third level is set, and the display mode of the alarm lamp R is changed from the lighting state to the luminance lowering lighting state in which the luminance is lowered as shown in FIG. Then, the alarm lamp R is turned off.

  Further, as shown in FIG. 6B, it is assumed that the traveling path of the vehicle M has a curved shape as shown in FIG. 4 and the steering angle of the vehicle M is in a neutral state. Further, it is assumed that the travel target point deviation amount D, which is the difference between the travel target point P2 and the predicted arrival point P1, is D2. In this case, the display visual recognition margin time T is a margin time T2 shorter than the maximum margin time Tm.

  Then, the first level is set until the allowance time T2 elapses, and the alarm lamp R is blinked as shown in FIG. Then, after the alarm lamp R starts to blink, the second level is set when the margin time T2 elapses, and the display mode of the alarm lamp R is changed from the blinking state to the lighting state shown in FIG. After that, when a certain amount of time has passed, the third level is set, and the display mode of the alarm lamp R is changed from the lighting state to the low-luminance lighting state shown in FIG. Thereafter, the alarm lamp R is turned off.

  While the vehicle is traveling, the driver's line of sight is the first line of sight SA as shown in FIG. 5, but when viewing the information in the meter, the driver moves to the second line of sight SB. Here, the first line of sight SA of the driver during traveling of the vehicle has an important function for performing a driving operation along the traveling path. For example, referring to FIG. 3, in order to travel on the travel path, driver H, for example, with respect to travel target point P2 expected to arrive after t seconds on travel target line WL, T seconds of the current vehicle state Compared with the predicted arrival point P1, which is a later position, the travel target point deviation amount D is estimated. The driver prepares for the next correction steering by cutting the necessary steering angle θ so as to eliminate the travel target point deviation amount D.

  Here, with reference to a driver model using a forward gazing point, the travel target point deviation amount D can be expressed by the following equation (1).

D = L · θ (1)
Where L: distance from the current position of the vehicle to the predicted arrival point P1

  Referring to the scene shown in FIG. 6, the travel target point deviation amount D is 0 on the straight road shown in FIG. 6 (a), and the travel target point deviation amount D is L2 on the curved road shown in FIG. 6 (b).・ It will occur for θ2. For this reason, in the example shown in FIG. 6A, the corrected steering angle = 0 and the corrected steering angle shown in FIG. 6B = θ2. At this time, as shown in FIG. 6 (c), the driver's line of sight L is premised on firmly looking at the front traveling road shape.

  At this time, in the example shown in FIG. 6A, it is not necessary to immediately perform the correction steering, and there is a time margin until the steering is performed. In the example shown in FIG. 6B, the correction steering is immediately required. In this state, there is no time. Therefore, it is considered that there is a map relationship shown in FIG. 4 between the travel target point deviation amount D and the display visual allowance time T. By referring to this map, the display visual recognition allowance time T can be grasped.

  In the vehicular alarm display control apparatus according to the present embodiment, as shown in FIG. 6A, when the travel target point deviation amount D is 0, the maximum margin time Tm as the margin time for the driver to visually recognize the meter. Set. Further, as shown in FIG. 6B, when the travel target point deviation amount D is large and the travel target point deviation amount D = D2, a margin time T2 (<Tm) for the driver to visually recognize the meter is set.

  As described above, in the vehicle alarm display control device according to the present embodiment, the display visual recognition allowance time is obtained based on the travel target point deviation amount D, and the luminance of the alarm display device is reduced according to the display visual recognition allowance time. Control is in progress. For this reason, it is possible to call attention without obstructing the forward gaze required for traveling more than necessary due to the troublesomeness caused by the visual stimulus in the meter and the reduction of the visual load. Furthermore, after the driver moves his / her line of sight to the alarm display performed by the alarm display device 7, the user can promptly return his / her line of sight when he / she wants to prompt the user to return his / her line of sight. As a result, when driving the vehicle, the driver's line of sight can be directed as far as possible in the direction of the forward traveling road, so that information can be provided at a level that does not affect the driving operation.

  Further, in the vehicle alarm display control device according to the present embodiment, the line-of-sight reference that the driver should turn to during driving is taken into consideration in accordance with the shape of the traveling road ahead. For this reason, it can be set as the information provision system adapted to the driving operation of the driver. Furthermore, in the vehicle alarm display control apparatus according to the present embodiment, the meter display control is canceled when the driver's line-of-sight direction is not the meter direction. For this reason, the control when the driver does not visually recognize the meter can be omitted, and the control load when the driver does not see the display can be reduced.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, in the above embodiment, the condition for performing the alarm is that the vehicle is off the road, but when there is an obstacle, a braking operation is performed to avoid contact with the obstacle. You can also. In this case, the display visual recognition margin time is set to the reciprocal of the free running distance. In this way, by determining the display visual recognition allowance time based on the free running distance of the stop distances, it is possible to leave the driver judgment based on the forward view in the alert area. Moreover, the display visual recognition allowance time can also be determined for both of deviating from the traveling road and making contact with the obstacle.

It is a block block diagram of the warning display control apparatus for vehicles. It is a flowchart which shows the process sequence of the alarm display control apparatus for vehicles. It is a typical overhead view which shows the relationship between a vehicle and a road. It is a map which shows the relationship between driving | running | working target point deviation | shift amount D and display visual recognition allowance time. It is a side view of a driver for showing a look direction. (A) is a schematic bird's-eye view showing the relationship between a vehicle on a straight road and the road, (b) is a schematic bird's-eye view showing a relationship between a vehicle on a curved road and the road, and (c) is for showing the line-of-sight direction. It is a side view of a driver. (A) is a figure of the meter which shows the state which a warning lamp blinks, (b) is a figure which shows the warning lamp which lights, (c) is a figure which shows the warning lamp which lights in a brightness reduction lighting state.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Runway detection sensor, 2 ... Runway recognition ECU, 3 ... Gaze detection sensor, 4 ... Gaze recognition ECU, 5 ... Vehicle behavior sensor, 6 ... Alarm processing ECU, 7 ... Alarm display device, 8 ... Buzzer, 9 ... Vibrator , D: Travel target point deviation amount, H: Driver, M ... Vehicle, P1 ... Expected arrival point, P2 ... Travel target point, R ... Warning lamp, SA ... First line of sight, SB ... Second line of sight, SX ... Line of sight reference , T: Display visual recognition margin time, T2: Margin time, Tm: Maximum margin time, WL1, WL2 ... White line.

Claims (3)

A vehicle alarm display control device that performs display control of an alarm display device that displays vehicle alarm information and notifies a driver,
Vehicle behavior acquisition means for acquiring the behavior of the vehicle;
Target travel point calculating means for calculating a target travel point of the vehicle;
Based on the vehicle behavior of the vehicle, a predicted arrival point calculating means for calculating a predicted arrival point of the vehicle;
Target point deviation amount calculating means for calculating a target point deviation amount which is a deviation between the target travel point and the expected arrival point;
Display visual allowance time calculating means for calculating a display visual allowance time that is a time when the driver can visually recognize the alarm display device based on the target point deviation amount;
Display control means for performing control to reduce the visual stimulation effect of the alarm display device after the display visual recognition margin time has elapsed;
With
The display viewing margin time calculating means, the higher the target point deviation amount is small, the display viewing margin time long calculation to the vehicle warning display control device according to claim Rukoto.   2. The vehicle according to claim 1, wherein a visual line direction of the driver after the display visual recognition allowance time has elapsed is acquired, and the visual stimulus effect is maintained when the acquired visual line direction of the driver is away from the warning display device. Alarm display control device.   The vehicle alarm display control device according to claim 1, wherein the visual stimulus effect is luminance.

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