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A two-stage braking active collision avoidance system and collision avoidance method for right-turning intelligent vehicles based on collision time

A time-to-collision, intelligent vehicle technology, applied in the direction of brakes, automatic starting devices, etc.

Active Publication Date: 2020-05-15
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also many scholars who have developed forward collision warning systems and large vehicle turning blind spot warning systems, but they have not been combined with active braking, and automatic emergency braking cannot be performed through electronic information systems.

Method used

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  • A two-stage braking active collision avoidance system and collision avoidance method for right-turning intelligent vehicles based on collision time
  • A two-stage braking active collision avoidance system and collision avoidance method for right-turning intelligent vehicles based on collision time
  • A two-stage braking active collision avoidance system and collision avoidance method for right-turning intelligent vehicles based on collision time

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] like Figure 6 As shown, in this embodiment, when the vehicle turns right and merges into the lane, it merges into the same lane with the left side of the target vehicle as an example. A two-stage braking active collision avoidance method for a right-turning intelligent vehicle includes the following steps:

[0110] Set the time interval as T, that is, calculate whether a collision occurs every T time, if the collision does not occur, continue sampling until the collision occurs, and output the time t at this time as the collision time t.

[0111] Define the vehicle speed V 1 , turning radius R, target vehicle speed V 2 , calculate the rotation angle θ through the speed of the vehicle, and the calculation method is θ=V 1 ×t×R -1 ;

[0112] The whole process considers that the target vehicle is stationary, the position of the target vehicle is (a, b), the position coordinates of the vehicle are (x(t), y(t)), and the size of the force applied to the vehicle is V 2 , ...

Embodiment 2

[0124] like Figure 7 As shown, in this embodiment, taking the collision condition of the vehicle with a pedestrian crossing the road ahead when turning right as an example, a two-stage braking active collision avoidance method for a right-turning intelligent vehicle includes the following steps:

[0125] Set the time interval as T, that is, calculate whether a collision occurs every T time, if the collision does not occur, continue sampling until the collision occurs, and output the time t at this time as the collision time t.

[0126] Define the vehicle speed V 1 , turning radius R, pedestrian speed V 2 , calculate the rotation angle θ through the speed of the vehicle, and the calculation method is θ=V 1 ×t×R -1 ;

[0127] The whole process considers that the pedestrian is stationary, the position of the pedestrian is (a, b), the position coordinates of the vehicle are (x(t), y(t)), and the size of the force applied to the vehicle is V 2 , and the speed in the opposite ...

Embodiment 3

[0138] like Figure 8 As shown, in this embodiment, the vehicle collides with a pedestrian crossing the road when turning right and merges into the lane as an example. A two-stage braking active collision avoidance method for a right-turning intelligent vehicle includes the following steps:

[0139] Set the time interval as T, that is, calculate whether a collision occurs every T time, if the collision does not occur, continue sampling until the collision occurs, and output the time t at this time as the collision time t.

[0140] Define the vehicle speed V 1 , turning radius R, pedestrian speed V 2 , calculate the rotation angle θ through the speed of the vehicle, and the calculation method is θ=V 1 ×t×R -1 ;

[0141] The whole process considers that the pedestrian is stationary, the position of the pedestrian is (a, b), the position coordinates of the vehicle are (x(t), y(t)), and the size of the force applied to the vehicle is V 2 , and the speed in the opposite direct...

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Abstract

The invention discloses a right-turning intelligent vehicle two-stage braking active collision avoidance system based on a collision time, and the collision avoidance system comprises the following parts: an information sensing system which is used for detecting the information of a target vehicle and the state information of a pedestrian, and outputting the information of the target vehicle and the state information of the pedestrian; a collision time calculation system that is used for receiving the target vehicle information and the pedestrian state information, classifying collision conditions, calculating collision time and outputting the collision time; and a two-stage braking active collision avoidance system that is used for receiving the collision time and executing collision avoidance after performing grade judgment. The invention discloses a right-turning intelligent vehicle two-stage braking active collision avoidance method based on the collision time.

Description

technical field [0001] The invention relates to the field of active collision avoidance for right-turning intelligent vehicles at intersections, in particular to a two-stage braking active collision avoidance system and collision avoidance method for right-turning intelligent vehicles based on collision time. Background technique [0002] With the continuous development of intelligent vehicles, the safety of intelligent vehicles is becoming more and more important. At intersections, there are more and more traffic accidents caused by intelligent vehicles turning. At the intersection, the traffic situation is more complicated, and there are many traffic participants. In order to realize the intelligent driving of the vehicle, it is necessary to solve the safety problem of the vehicle at the intersection, so the safety of the right turning process of the intelligent vehicle should be guaranteed first. When the vehicle is turning right, the driver is often unaware that a coll...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T7/22B60T8/172B60T8/58
Inventor 沈传亮张山高镇海周斌宇苏卫胡艺博杜英辰
Owner JILIN UNIV
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