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Vehicle guidance mechanism

  • US 3,935,922 A
  • Filed: 07/16/1974
  • Issued: 02/03/1976
  • Est. Priority Date: 07/16/1974
  • Status: Expired due to Term
First Claim
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1. Vehicle guidance means for guiding a vehicle along a surface, said guidance means comprising a guide line which is substantially invisible under ordinary ambient lighting conditions and which contains material that emits radiation in a first frequency range in response to stimulation by radiation in a second frequency range, said guidance means further comprising:

  • radiation means in the vehicle adapted to direct radiation in said second frequency range on the guide line so as to cause the guide line to emit said first frequency radiation;

    sensor means mounted in the vehicle and adapted to sense the first frequency radiation emitted by the guide line and in response thereto to generate an error output signal representative of the variation of the vehicle position from a predetermined lateral position with respect to the guide line; and

    control means in the vehicle adapted to steer the vehicle in response to the error signal generated by the sensor means so as to maintain the vehicle in said predetermined lateral position with respect to the guide line as the vehicle moves along the guide line.

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