Rear collision avoidance system for vehicle

Patent metadata

Field	Value
Publication number	US-9327693-B2
Application number	US-201414248602-A
Country	US
Kind code	B2
Filing date	Apr 9, 2014
Priority date	Apr 10, 2013
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

A collision avoidance system of a vehicle includes a camera disposed at a vehicle and having a field of view exterior of and rearward of the vehicle. An image processor is operable to process image data captured by the camera. Responsive to image processing of captured image data, the collision avoidance system is operable to determine an approach of a vehicle rearward of the vehicle and to determine an excitation level depending on a difference between the speed of the approaching vehicle and the speed of the equipped vehicle and a distance between the approaching vehicle and the equipped vehicle. Responsive to the determined excitation level, the collision avoidance system may provide an alert to the driver of one or both vehicles, prepare for impact, control a vehicle braking system, vehicle steering system and/or vehicle acceleration system and/or communicate information to the approaching vehicle via a telematics system.

First claim

The invention claimed is:

1. A collision avoidance system of a vehicle, said collision avoidance system comprising:
a camera disposed at a vehicle equipped with said collision avoidance system, said camera having a field of view exterior of and rearward of the equipped vehicle;
a plurality of other sensors disposed at the equipped vehicle so as to sense forwardly and sidewardly of the equipped vehicle, said plurality of other sensors capturing sensor data;
an image processor operable to process image data captured by said camera;
wherein, responsive to image processing of captured image data, said collision avoidance system is operable to determine an approach of a vehicle rearward of the equipped vehicle and to determine an excitation level depending on (i) a difference between the speed of the approaching vehicle and the speed of the equipped vehicle and (ii) a distance between the approaching vehicle and the equipped vehicle;
wherein, responsive to a determined excitation level, said collision avoidance system is operable to at least one of (a) provide an alert to the driver of the equipped vehicle, (b) provide a visual alert to the driver of the approaching vehicle, (c) prepare the equipped vehicle for impact, (d) control a braking system of the equipped vehicle and (e) control an acceleration system of the equipped vehicle;
wherein, responsive to a determined excitation level, said collision avoidance system is operable to at least one of (i) transmit an alert to the driver of the approaching vehicle via a telematics system and (ii) communicate information to the approaching vehicle via a telematics system; and
wherein said collision avoidance system is operable to process sensor data captured by said plurality of other sensors to determine at least one avoidance path of travel for the equipped vehicle to follow, and wherein, responsive to the determined excitation level being greater than a threshold level, said collision avoidance system controls a steering system of the equipped vehicle to follow the determined avoidance path of travel.

2. The collision avoidance system of claim 1 , wherein, responsive to a determined excitation level, said collision avoidance system is operable to transmit an alert to the driver of the approaching vehicle via the telematics system.

3. The collision avoidance system of claim 1 , wherein, responsive to a determined excitation level, said collision avoidance system is operable to communicate information to the approaching vehicle via the telematics system.

4. The collision avoidance system of claim 3 , wherein, responsive to a determined excitation level being at a first threshold level, said collision avoidance system is operable to communicate speed and deceleration rates to the approaching vehicle.

5. The collision avoidance system of claim 4 , wherein, responsive to a determined excitation level being at a second threshold level, said collision avoidance system is operable to request a brake intervention to the approaching vehicle to control the brake system of the approaching vehicle.

6. The collision avoidance system of claim 5 , wherein said collision avoidance system is operable to request an increased degree of braking of the approaching vehicle responsive to an increased determined excitation level.

7. The collision avoidance system of claim 5 , wherein, responsive to a determined excitation level being at a third threshold level, said collision avoidance system is operable to communicate with the approaching vehicle to determine respective collision avoidance paths for the vehicles to mitigate collision.

8. The collision avoidance system of claim 1 , wherein, responsive to a determined excitation level being indicative of an imminent collision, said collision avoidance system is operable to prepare the equipped vehicle for impact.

9. The collision avoidance system of claim 8 , wherein said collision avoidance system prepares the equipped vehicle for impact by at least one of (i) pretensioning a seat belt of the equipped vehicle, (ii) adjusting a seat of the equipped vehicle, (iii) adjusting a seat of the equipped vehicle to an upright position, (iv) adjusting a headrest of the equipped vehicle and (v) deploying a roll over bar of the equipped vehicle.

10. The collision avoidance system of claim 1 , wherein, responsive to a determined excitation level being at a first threshold level, said collision avoidance system is operable to (a) provide an alert to the driver of the equipped vehicle and (b) provide an alert to the driver of the approaching vehicle.

11. The collision avoidance system of claim 10 , wherein, responsive to a determined excitation level being at a second threshold level, said collision avoidance system is operable to (a) control a braking system of the equipped vehicle, (b) control the steering system of the equipped vehicle and (c) control an acceleration system of the equipped vehicle.

12. The collision avoidance system of claim 11 , wherein said collision avoidance system provides a variable visible alert to the driver of the equipped vehicle and wherein said variable visible alert at least one of (i) increases intensity as the determined excitation level increases and (ii) increases a rate of flash as the determined excitation level increases.

13. The collision avoidance system of claim 11 , wherein said collision avoidance system provides a variable visible alert to the driver of the approaching vehicle and wherein said variable visible alert at least one of (i) increases intensity as the determined excitation level increases and (ii) increases a rate of flash as the determined excitation level increases.

14. A collision avoidance system of a vehicle, said collision avoidance system comprising:
a camera disposed at a vehicle equipped with said collision avoidance system, said camera having a field of view exterior of and rearward of the equipped vehicle;
a plurality of other sensors disposed at the equipped vehicle so as to sense forwardly and sidewardly of the equipped vehicle, said plurality of other sensors capturing sensor data;
an image processor operable to process image data captured by said camera;
wherein, responsive to image processing of captured image data, said collision avoidance system is operable to determine an approach of a vehicle rearward of the equipped vehicle and to determine an excitation level depending on (i) a difference between the speed of the approaching vehicle and the speed of the equipped vehicle and (ii) a distance between the approaching vehicle and the equipped vehicle;
wherein, responsive to a determined excitation level, said collision avoidance system is operable to at least one of (a) control a braking system of the equipped vehicle and (b) control an acceleration system of the equipped vehicle;
wherein, responsive to a determined excitation level and processing of sensor data captured by said plurality of other sensors, said collision avoidance system is operable to determine an avoidance path of travel for the equipped vehicle;
wherein, responsive to a determined excitation level, said collision avoidance system is operable to at least one of (i) transmit an alert to the driver of the approaching vehicle via a telematics system and (ii) communicate information to the approaching vehicle via a telematics system;
wherein, responsive to a determined excitation level being at a first threshold level, said collision avoidance system is operable to (a) provide an alert to the driver of the equipped vehicle and (b) provide a visible alert to the driver of the approaching vehicle;
wherein, responsive to a determined excitation leve

Assignees

• Magna Electronics Inc

Inventors

• Wolf Johannes

Classifications

• B60W30/09 Primary

  Taking automatic action to avoid collision, e.g. braking and steering · CPC title

• B60W10/18

  including control of braking systems · CPC title

• B60W10/20

  including control of steering systems · CPC title

• B62D15/0265

  Automatic obstacle avoidance by steering · CPC title

• B60W2050/143

  Alarm means · CPC title