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Distance measuring equipment for a car

  • US 5,160,971 A
  • Filed: 09/27/1991
  • Issued: 11/03/1992
  • Est. Priority Date: 09/28/1990
  • Status: Expired due to Fees
First Claim
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1. Distance measuring equipment for a car having a non-reflecting protective glass with a wiper outside the car comprising:

  • first means provided inside the car for optically measuring a distance between the car and one of obstacles forward or backward of the car;

    second means for optically detecting a condition where the non-reflecting protective glass reflects light and for providing an output;

    third means for driving the wiper in response to the output of said second means upon the detection of the reflection conditionfourth means for detecting a driving angle of said third means; and

    fifth means for interrupting the operation of said first means only when the driving angle of said third means resides within a range of a predetermined measuring angle of said first means.

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