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Obstacle detection apparatus

  • US 4,722,410 A
  • Filed: 06/26/1986
  • Issued: 02/02/1988
  • Est. Priority Date: 06/26/1986
  • Status: Expired due to Fees
First Claim
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1. Apparatus for detecting failure of an obstacle sensing device associated with a vehicle, said vehicle having a power supply and a vehicle brake and brake control circuit, comprising:

  • a plurality of radiant energy emitting devices each associated with a respective radiant energy receiving device;

    a vehicle control means for controllably producing first and second energization signals in response to a predetermined condition of said vehicle;

    first and second switch means for receiving respective ones of said first and second energization signals, and responsively controllably supplying electrical power from said power supply to predetermined ones of said radiant energy emitting and receiving devices;

    first and second solenoid coils each serially connected to respective first and second sets of radiant energy receiving devices, said first and second sets of radiant energy receiving devices being mutually exclusive;

    first and second electrical contact sets serially connected between said power supply and said brake control circuit, each of said first and second electrical contact sets being responsive to a respective one of said first and second solenoid coils; and

    logic mean for controllably producing a fault signal in response to failure of at least one of said radiant energy emitting devices, said radiant energy receiving devices, said first and second solenoid coils, and said first and secnd electrical contact sets.

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