Method of tracking and sensing position of objects

  • US 6,442,476 B1
  • Filed: 10/13/2000
  • Issued: 08/27/2002
  • Est. Priority Date: 04/15/1998
  • Status: Expired due to Fees
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First Claim
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1. A method for determining the position of a movable object, including the steps of:

  • (a) initiating the method when said object is at an initial known location in three-dimensions;

    (b) obtaining data indicative of the three-dimensional location relative to said object of one or more fixed reference features by way of one or more sensors associated with said object to determine the displacement of said object from said reference feature(s);

    (c) moving said object to a new object location;

    (d) at the new object location, obtaining new data indicative of the new location of said fixed reference feature or features relative to said object via said sensor(s);

    (e) determining from said new data, the displacement of said object relative to said fixed feature or features;

    (f) determining from said displacement of said object and knowledge of said initial known location, the new three-dimensional location of said object;

    (g) if the object is moving out of view of said fixed reference feature(s), and/or when a new fixed reference feature or features come into view, obtaining data via said sensor(s) indicative of the three-dimensional location of said new fixed feature or features which may be used as new reference locations relative to said object; and

    h) repeating steps (c) to (g) as required until predetermined conditions are fulfilled.

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