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Method and apparatus for detection and tracking of objects within a defined area

  • US 7,671,718 B2
  • Filed: 01/21/2005
  • Issued: 03/02/2010
  • Est. Priority Date: 01/27/2004
  • Status: Active Grant
First Claim
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1. A method of locating an object within a defined area, comprising:

  • interrogating the defined area with a narrow, directed beam emanating from a combined action of phased signals simultaneously transmitted from more than one location to determine the presence of an object within the defined area, the narrow, directed beam providing power to at least one passive information device associated with the object to enable transmission of a responsive signal, wherein multiple interrogation devices simultaneously provide the phased signals, are within communication range of at least one master controller unit, transmit the narrow, directed beam within the defined area, and receive the signal from the at least one passive information device if the object is within the defined area, the responsive signal including data indicative of the presence of the object within the defined area;

    transmitting the data from the multiple interrogation devices to the at least one master controller unit and storing the data received in a memory therein;

    compiling the data received from the multiple interrogation devices at the at least one master controller unit; and

    interpreting the data compiled by at the least one master controller unit to determine characteristic information of the object within the defined area.

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