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Tracking system and method for controlling the field of view of a camera

  • US 5,920,288 A
  • Filed: 06/07/1995
  • Issued: 07/06/1999
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Term
First Claim
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1. A method of calculating the angle of displacement of an object from a reference angle having an origin at a reference position comprising the steps of:

  • A. transmitting an electromagnetic signal from the object to the reference position after receiving by the object an initial transmitted sync signal as a timing reference;

    B. receiving the electromagnetic signal transmitted at the reference position at two electromagnetic receiver locations spaced a known distance apart;

    C. synchronizing the initiation of the electromagnetic signal transmitted in step A with the receiving thereof in step b at each of the two electromagnetic receiver locations;

    D. determining the distance between each respective spaced location and the object by determining the time of flight of the electromagnetic signal between the respective spaced location and the object; and

    E. computing the angle of displacement of the object from the reference from the determinations of step D.

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