Vehicle backing aid

  • US 4,937,796 A
  • Filed: 01/10/1989
  • Issued: 06/26/1990
  • Est. Priority Date: 01/10/1989
  • Status: Expired due to Fees
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First Claim
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1. A system for effectively assisting in the backing of a vehicle comprising:

  • sonar ranging means having a transducer mounted to the rear of said vehicle, said sonar ranging means including means for generating and projecting a beam of pulsed acoustic energy horizontally through the air behind said vehicle, and for receiving returned pulses and generating therefrom a number corresponding to the distance from said transducer to an object reflecting said beammeans for converting said number into an audible human speech equivalent, whereby the operator of said vehicle is assisted in the backing thereof through the range callout; and

    ,means for detecting a rapid change of detected range in terms of Δ

    R/Δ

    T for predetermined Δ

    R/Δ

    T and means for providing an alarm indication responsive thereto.

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