Method for operating a pre-crash sensing system in a vehicle having a counter-measure system
First Claim
1. A pre-crash sensing system coupled to a counter-measure system for sensing an object comprising:
- a vision system producing a plurality of frames at a rate of at least about 100 frames per second;
a video processor coupled to said vision system, said video processor determining a distance, velocity and an acceleration of the object from said plurality of frames; and
a controller coupled to said vision system for deploying said counter measure in response to said object distance, object velocity and said object acceleration.
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Abstract
A pre-crash system (10) has a controller (12) coupled to an object sensor (18). Object sensor (18) has a vision system (22) that includes image sensors to detect an impact and in particular, a side impact. The image sensors provide a high frame rate to a video-processing chip (32) which in turn is coupled to a general purpose controller (34). The general-purpose controller 34 determines whether an object is an impending threat and controls the deployment of an airbag through an airbag controller (36) or other counter-measure. The high frame rate used in the present invention allows not only the distance to the object but the velocity of the object as well as the acceleration of the object to be determined and factored into the deployment decision.
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Citations
21 Claims
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1. A pre-crash sensing system coupled to a counter-measure system for sensing an object comprising:
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a vision system producing a plurality of frames at a rate of at least about 100 frames per second;
a video processor coupled to said vision system, said video processor determining a distance, velocity and an acceleration of the object from said plurality of frames; and
a controller coupled to said vision system for deploying said counter measure in response to said object distance, object velocity and said object acceleration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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10. A pre-crash side-impact sensing system for an automotive vehicle for sensing an object comprising:
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a camera vision system producing a plurality of frames at a rate of at least about 100 frames per second;
a video processor coupled to said vision system, said video processor determining a distance, velocity and an acceleration of the object from said plurality of frames; and
a controller coupled to said vision system for deploying said counter measure in response to said object distance, object velocity and said object acceleration. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 19)
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18. A method for operating a pre-crash sensing system for an automotive vehicle having a counter-measure system, said method comprising:
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generating a plurality of images of the object from an image device having a frame rate of at least 100 frames per second camera;
determining an object distance with the image device;
determining an object speed and acceleration with the image device as a function of frame rate; and
activating the counter measure system in response to the object size, object distance and object acceleration. - View Dependent Claims (20, 21)
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Specification