Vehicular proximity sensing system

  • US 5,173,881 A
  • Filed: 03/19/1991
  • Issued: 12/22/1992
  • Est. Priority Date: 03/19/1991
  • Status: Expired due to Term
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First Claim
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1. A vehicular proximity sensing system to detect the relative approach of an external object to a motorized vehicle, the system havinga plurality of reflectable energy transmitting-receiving distance-detecting devices disposed around the vehicle'"'"'s periphery;

  • driver-alert means responsive to signals received from the distance-detector devices to alert a driver to approach of the vehicle to within a preselected distance of the external object; and

    electronic signal-processing means for coding a reflected energy signal to be transmitted by the distance-detector devices to have a unique character distinguishing the signal from signals emitted by other vehicles equipped with a similar vehicular proximity sensing systemwherein the electronic signal-processing means includes received-signal analyzer means to recognize said coding in received signals and accept or reject them accordingly.

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