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Collision detector for a vehicle

  • US 4,873,452 A
  • Filed: 09/22/1988
  • Issued: 10/10/1989
  • Est. Priority Date: 12/23/1987
  • Status: Expired due to Term
First Claim
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1. A collision detector for a vehicle comprising:

  • an acceleration sensor for detecting acceleration of the vehicle;

    signal processing circuit which provides a collision signal when a value, based on an output of the acceleration sensor, exceeds a predetermined reference collision level;

    a diagnostic pulse generator which applies diagnostic pulses to the acceleration sensor to detect a failure of the acceleration sensor; and

    a diagnostic circuit which stops an output of the output diagnostic oulses the diagnostic pulse generator when the output of the acceleration sensor exceeds a malfunction avoidance level which is lower than the predetermined reference collision level.

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