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Obstacle detection device for vehicle

  • US 6,903,680 B2
  • Filed: 10/28/2003
  • Issued: 06/07/2005
  • Est. Priority Date: 11/29/2002
  • Status: Active Grant
First Claim
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1. An obstacle detection device for a vehicle comprising:

  • radar means which radiates transmitted waves outside the vehicle and detects reflected waves of the transmitted waves;

    sensing means which senses a distance to an obstacle around the vehicle based on a result of detection of the reflected waves by the radar means;

    determining means which determines a limit distance within which the sensing means is capable of sensing, wherein the determining means determines the limit distance based on a result of detection of reflected waves whose signal level is lower than a preset signal level; and

    judging means which compares the limit distance determined by the determining means with a preset sensing reference distance and thereby judges an operating state of the device, wherein the sensing means includes signal level judging means which judges a signal level of the reflected waves.

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