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Method for detecting an obstacle around a vehicle

  • US 7,271,762 B2
  • Filed: 01/27/2005
  • Issued: 09/18/2007
  • Est. Priority Date: 11/29/2002
  • Status: Active Grant
First Claim
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1. A method for detecting an obstacle around a vehicle, comprising the steps of:

  • radiating transmitted waves outside the vehicle, the transmitted waves being radiated by a radar;

    detecting reflected waves of the transmitted waves, the reflected waves being detected by the radar;

    sensing a distance to an obstacle around the vehicle based on a result of detection of the reflected waves by the radar, including judging a signal level of the reflected waves;

    determining a limit distance within which the distance can be sensed, wherein the determining step determines the limit distance based on certain waves of the detected reflected waves, the certain waves having the signal level lower than a preset level; and

    comparing the limit distance determined by the determining step with a preset sensing reference distance, and thereby determining whether the obstacle can be detected.

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