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Road surface condition detector for automotive vehicle

  • US 5,521,594 A
  • Filed: 02/24/1994
  • Issued: 05/28/1996
  • Est. Priority Date: 02/25/1993
  • Status: Expired due to Term
First Claim
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1. A road surface condition detector for an automotive vehicle for detecting a dry/wet condition of a road surface, comprising:

  • receiver means mounted on a body of an automotive vehicle for receiving ultrasonic noise generated by a road wheel tire of said automotive vehicle, said receiver means being arranged on the body so as to be directed toward a contact surface between said road wheel tire and a road surface;

    intensity detector means, coupled to said receiver means, for detecting an intensity of said ultrasonic noise from an output of said receiver means and generating an intensity signal corresponding to said intensity of said ultrasonic noise; and

    judgement means, coupled to said intensity detector means, for determining a dry/wet condition of said road surface from said intensity signal output from said intensity detector means.

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