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Forward collision warning system with road-side target filtering

  • US 8,577,552 B1
  • Filed: 08/13/2012
  • Issued: 11/05/2013
  • Est. Priority Date: 08/13/2012
  • Status: Active Grant
First Claim
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1. A method of forward collision warning for a motor vehicle comprising:

  • operating a sensor system to detect a target ahead of the vehicle;

    identifying a Collision Threat Zone (CTZ) along a predicted path of the vehicle;

    continuously measuring a steering input angle (SIA) change rate and a yaw rate of the vehicle;

    continuously tracking a near-past maximum absolute value of the SIA change rate during a first look-back period;

    continuously tracking a far-past variation of the yaw rate during a second look-back period longer than the first look-back period;

    applying a first width-reduction to at least a portion of the CTZ in the event that a) the near-past maximum absolute value of SIA change rate exceeds a first SIA change rate threshold, andb) the far-past variation of yaw rate exceeds a first yaw rate threshold value; and

    suppressing a threat warning based on detection of the target if the target is outside of the CTZ with the first width-reduction applied.

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