JP2010003238A - Driving support device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a driving support device for surely stopping a vehicle at a stop location while promoting highly safe driving corresponding to a peripheral environment. <P>SOLUTION: In a driving support device 1, when the vehicle speed of a self-vehicle 10 is equal to or less than a speed limit, normal first conditions are applied as warning conditions, and stop support is executed under the first conditions. When the vehicle speed of the self-vehicle 10 exceeds the speed limit, second conditions which are more strict than the first conditions are applied as warning conditions, and stop support is executed under the second conditions. Therefore, when the vehicle speed of the self-vehicle 10 exceeds the speed limit, stop support is executed under second conditions K2, and the vehicle is stopped at a stop location while a driver is encouraged to observe the speed limit. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a driving support apparatus that performs stop support for stopping a vehicle such as an automobile.

As a conventional driving support device, for example, as described in Patent Document 1, a device including a support execution unit that executes stop support under a stop support condition is known. In such a driving assistance device, for example, a lighting state of a traffic light installed at an intersection is predicted to be a red signal, and a vehicle entering the intersection is predicted to be difficult to stop at a stop line (stop position) at the intersection. Stop support such as warnings is executed.
Japanese Patent Laid-Open No. 11-53686

  Here, in the driving support device as described above, for example, the condition for executing the stop support is a uniform condition regardless of whether the vehicle speed exceeds the speed limit. That is, the condition for executing the stop support only considers whether or not the vehicle can be stopped at the stop position regardless of the surrounding environment of the vehicle. For this reason, in the driving support apparatus as described above, the driving prompted by the stop support may be less safe depending on the surrounding environment.

  Then, this invention makes it a subject to provide the driving assistance device which can stop a vehicle reliably in a stop position, encouraging the driving | operation with high safety | security according to the surrounding environment.

  In order to solve the above problems, a driving support device according to the present invention is a driving support device that performs stop support for stopping a vehicle, and includes a support execution unit that performs stop support under a stop support condition, and a vehicle. Surrounding environment acquisition means for acquiring information related to the surrounding environment, wherein the support execution means changes the stop support condition in accordance with the information acquired by the surrounding environment acquisition means.

  According to this driving support device, the stop support condition is changed according to the surrounding environment of the vehicle, and the stop support is executed under the changed stop support condition. Therefore, for example, when the vehicle speed exceeds the speed limit, the stop support condition is changed to a stricter condition than the normal condition, and the stop speed is executed under the changed condition so that the speed limit is observed. The vehicle is stopped at the stop position while promptly driving. Therefore, according to the present invention, the vehicle can be surely stopped at the stop position while urging highly safe driving according to the surrounding environment.

  Further, the surrounding environment acquisition means acquires information on traffic rules around the vehicle, and the support execution means changes when the vehicle deviates from the traffic rules so that the stop support conditions are changed to be stricter. When the traffic rules deviate, it is preferable to change so that the stop support conditions become strict. In this case, the vehicle can be surely stopped at the stop position while prompting driving so as to comply with the traffic rules.

  Further, it is preferable that the support execution means execute stop support for stopping the vehicle at a stop line of the intersection when the signal state of the intersection where the vehicle enters is a red signal. In this case, the vehicle can be reliably stopped at the stop line at the intersection of the red light.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to stop a vehicle reliably at a stop position, encouraging the driving | operation with high safety | security according to the surrounding environment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a schematic configuration diagram showing a driving assistance apparatus according to an embodiment of the present invention. As shown in FIG. 1, the driving assistance apparatus 1 of this embodiment performs stop assistance to the host vehicle (vehicle) 10 entering the intersection. The driving support device 1 is mounted on the host vehicle 10 and includes an infrastructure information acquisition device (ambient environment acquisition means) 2, a vehicle information acquisition device 3, an alarm device 4, and an ECU 5.

  The infrastructure information acquisition device 2 is for receiving and acquiring infrastructure information. For example, an optical beacon or a navigation system is used. The infrastructure information acquisition device 2 here acquires the speed limit of the target section R (see FIG. 3) where the host vehicle 10 is traveling, the lighting state of the traffic light at the intersection, the distance to the stop line, and the like as infrastructure information. . Note that the speed limit of the target section R is not only acquired by reception, but may be used in advance, for example, in a navigation system.

  The vehicle information acquisition device 3 is for obtaining vehicle information such as the vehicle speed of the host vehicle 10. The alarm device 4 outputs an alarm for stopping support to the driver. Instead of or in addition to the alarm device 4, an information providing device that provides information for stop support to the driver and an alert device that performs alert for stop support to the driver may be used.

  The ECU 5 includes, for example, a CPU, a ROM, a RAM, and the like. The ECU 5 operates the alarm device 4 under an alarm condition (stop support condition). The ECU 5 changes the alarm condition according to the surrounding environment of the host vehicle 10 and operates the alarm device 4 under the changed alarm condition (details will be described later).

  Next, the process of the drive assistance apparatus 1 demonstrated is demonstrated, referring the flowchart shown in FIG. In the following description, as shown in FIG. 3, an example is given in which alarm output is performed as stop support at an intersection 12 where a traffic light 11 is installed, and the host vehicle 10 is stopped at a stop line (stop position) 13. I will explain.

  First, the infrastructure information acquisition device 2 receives a signal from the infrastructure facility 15 to acquire infrastructure information, and the vehicle information acquisition device 3 acquires vehicle information (S1). Subsequently, the speed limit of the target section R is recognized (S2). Then, the ECU 5 performs the following processing.

  That is, it is determined whether or not the host vehicle 10 deviates from the traffic rules. Specifically, it is determined whether or not the vehicle speed of the host vehicle 10 is equal to or less than the speed limit (S3). When the vehicle speed of the host vehicle 10 is equal to or lower than the speed limit, the first condition that is a normal alarm condition is applied as an alarm condition for executing the alarm output (S4). On the other hand, when the vehicle speed of the host vehicle 10 exceeds the speed limit, the second condition, which is a warning condition that is severer (early issued) than the first condition, is applied as the warning condition (S5).

  FIG. 4 is a diagram showing an example of alarm conditions. In the figure, the horizontal axis indicates the distance L between the stop line 13 at the intersection 12 and the host vehicle 10, and the vertical axis indicates the vehicle speed V of the host vehicle 10. A solid line K1 indicates the first condition, and a broken line K2 indicates the second condition. As shown in FIG. 4, the first condition K1 is set based on the distance L and the vehicle speed V in a region where the vehicle speed is equal to or less than the limit speed α. Here, the first condition K1 is a condition that is proportional to the distance L and the vehicle speed V. For example, the first condition K1 includes a condition such that an arrival time TTC (Time To Collision) from reaching the current position of the host vehicle 10 to the intersection 12 is 3.

  On the other hand, the second condition K2 is set based on the distance L and the vehicle speed V in a region where the vehicle speed is faster than the speed limit α. Here, the second condition K2 is a condition that is a proportional relationship between the distance L having a slope smaller than the slope of the first condition K1 and the vehicle speed V. For example, the second condition K2 includes a condition such that TTC = 5.

  Subsequently, it is determined whether or not the own vehicle 10 can pass through the intersection 12 (S6). If it is possible to pass through the intersection 12, the process is terminated as it is. On the other hand, if it is impossible to pass through the intersection 12 (that is, the traffic light 11 is red), a transition is made to a standby state for alarm output (S7).

  When the applied alarm condition is met in the alarm output standby state, the alarm output by the alarm device 4 is executed (S8 → S9). And when the vehicle state of the own vehicle 10 exists in the area | region A above the conditions K1 and K2 shown in FIG. 4, execution of alarm output is continued. Further, when a condition that does not correspond to the alarm condition and the vehicle 10 is determined to have deviated from the lane (hereinafter referred to as “service-out condition”) is satisfied, the process ends (S8 → S10). On the other hand, when the service-out condition is not satisfied, the process returns to S3 and the subsequent processing is repeatedly performed.

  In the above, the alarm device 4 and the ECU 5 that operates the alarm device 4 constitute support execution means.

  As described above, in the driving support device 1, when the vehicle speed of the host vehicle 10 is equal to or lower than the speed limit, the normal first condition K1 is applied as the alarm condition, and when the vehicle speed of the host vehicle 10 exceeds the speed limit, the alarm condition is The second condition K2, which is stricter than the first condition K1, is applied. That is, the alarm condition is changed according to the surrounding environment of the host vehicle 10 (here, the speed limit). Then, stop support is executed under the changed alarm condition. Therefore, when the vehicle speed of the host vehicle 10 exceeds the speed limit, stop assistance is executed under the second condition K2, and the vehicle is stopped at the stop position while driving to comply with the speed limit is urged. It will be. Therefore, according to the present embodiment, the host vehicle 10 can be reliably stopped at the stop line 13 while urging highly safe driving according to the surrounding environment.

  In the present embodiment, as described above, when the vehicle speed of the host vehicle 10 exceeds the speed limit, the second condition K2 that is stricter than the first condition K1 is applied as the alarm condition. That is, when the own vehicle 10 deviates from the traffic rules, the warning condition is changed to be strict. Therefore, it is possible to reliably stop the host vehicle 10 at the stop line 13 while urging driving so as to comply with traffic rules, and it is possible to provide excellent stop support in terms of enlightenment society.

  In the present embodiment, since the alarm condition is changed based on the vehicle speed of the host vehicle 10, stop support for stopping the host vehicle 10 only at the stop line 13 is not provided, but the meaning of the vehicle speed is taken into consideration. It can be said that stop support is made.

  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 alarm condition is changed according to the speed limit of the target section R, but the alarm condition may be changed according to the surrounding environment of the host vehicle 10. Specifically, for example, at least one of a reference speed obtained from a road width, whether or not a traveling lane is a single-seater lane, an actual speed, a vehicle speed of surrounding vehicles, an average vehicle speed of surrounding vehicles, and the like. The alarm condition may be changed according to the information obtained by inter-vehicle communication or road-to-vehicle communication.

  In the above embodiment, the second condition K2 is more severe than the first condition K1, but the second condition K2 may be milder than the first condition K1. In this case, it is possible to suppress overconfidence of the driver due to the stop support.

  Moreover, although the said embodiment performs the stop assistance which makes the stop line 13 of the intersection 12 a stop position, it is not limited to this, The present invention can perform the stop support stopped at various stop positions. In the above embodiment, the alarm condition is changed so as to be switched between the first condition and the second condition. However, the alarm condition may be changed continuously according to the surrounding environment of the vehicle.

  In the case where the speed limit changes in the middle of the target section R, the condition may be changed at the time of the change. In addition, when it is known in advance that the speed limit changes in the middle of the target section R, a constant speed (for example, the minimum speed limit, the maximum speed limit, or the final speed limit in the target section R is taken into account). Speed) may be used as a condition change threshold.

It is a block diagram which shows schematic structure of the driving assistance device which concerns on one Embodiment of this invention. It is a flowchart which shows the operation | movement flow of the driving assistance device of FIG. It is a top view which shows the road structure around an intersection. It is a diagram which shows an example of alarm conditions.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Driving assistance apparatus, 2 ... Infrastructure information acquisition apparatus (ambient environment acquisition means), 4 ... Alarm apparatus (support execution means), 5 ... ECU (support execution means), 10 ... Own vehicle (vehicle), 12 ... Intersection, 13: Stop line (stop position).

Claims (3)

A driving support device that provides stop support for stopping a vehicle,
Support execution means for executing the stop support under a stop support condition;
Ambient environment acquisition means for acquiring information related to the surrounding environment of the vehicle,
The driving support device, wherein the support execution unit changes the stop support condition according to the information acquired by the ambient environment acquisition unit. The ambient environment acquisition means acquires information on traffic rules around the vehicle,
The driving support device according to claim 1, wherein the support execution unit changes the stop support condition to be strict when the vehicle deviates from the traffic rule. The said assistance execution means performs the said stop assistance for stopping the said vehicle at the stop line of the said intersection when the signal state of the intersection which the said vehicle approachs is a red signal. 2. The driving support device according to 2.

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