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Laser perimeter awareness system

  • US 6,985,212 B2
  • Filed: 05/19/2003
  • Issued: 01/10/2006
  • Est. Priority Date: 05/19/2003
  • Status: Expired due to Fees
First Claim
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1. Method of laser scanning a perimeter zone of a target site for the detection of an object, said method comprising the steps of:

  • pulsing a laser beam at a predetermined pulse repetition rate;

    oscillating said pulsed laser beam through a predetermined angle in a first direction;

    scanning said oscillating pulsed laser beam in a second direction across said perimeter zone;

    receiving echoes from said pulsed laser beam during said perimeter zone scan;

    deriving range data corresponding to said received echoes;

    determining two-dimensional position data of said received echoes in said perimeter zone;

    forming a three-dimensional scene image of a scan of said perimeter zone based on said range and two-dimensional position data of said received echoes thereof;

    repeating the steps of scanning, deriving, determining and forming for a plurality of perimeter zone scans to form three-dimensional scene images of each scan of said plurality; and

    comparing the three-dimensional scene images of said plurality to detect the object in said perimeter zone.

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