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Automotive collision avoidance and/or air bag deployment radar

  • US 4,673,937 A
  • Filed: 07/24/1985
  • Issued: 06/16/1987
  • Est. Priority Date: 07/24/1985
  • Status: Expired due to Term
First Claim
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1. An automotive vehicle radar for a vehicle, said vehicle having a body and steerable wheels comprising:

  • a transmitter for transmitting an FM CW radar signal of a selected beam width in a selected direction relative to the direction of said steerable wheels;

    a receiver for receiving the transmitted radar signals reflected from objects within said selected direction and producing a plurality of separate and distinct analog voltage level signals therefrom, each signal having a different voltage level range which represent different vehicle to object relationships;

    vehicle means for producing a plurality of separate and distinct analog DC voltage level signals each having a different range of predetermined value levels and representing different relative vehicle conditions;

    summing means for adding together the DC levels of the plurality of separate and distinct analog DC voltage level signals from said receiver and vehicle means and producing a single DC voltage amplitude level signal therefrom equal in amplitude to the total amplitude of the voltage levels thereof;

    means for producing a first predetermined analog DC voltage level signal which represents a maximum voltage level of said single DC voltage amplitude level signal for safe vehicle operation;

    comparator means for comparing said single DC voltage amplitude level signal with said first predetermined DC voltage level signal and producing a first command signal therefrom only when said single DC voltage amplitude signal exceeds the level of said first predetermined DC voltage level signal.

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