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Tagging system and method

  • US 20020070863A1
  • Filed: 10/16/2001
  • Published: 06/13/2002
  • Est. Priority Date: 03/16/1999
  • Status: Abandoned Application
First Claim
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1. A tagging system for persons or objects, the tagging system comprising:

  • tags to be carried by the persons or objects, each tag being adapted to transmit a signal carrying an identification code unique to the tag;

    at least one first tag detector for arrangement at one or more entrances to areas, and for detecting the identification code carried by the signals from tags passing through the or each respective entrance, the detection region of said at least one first tag detectors being limited to the region of a respective said entrance;

    entrance processing means for processing the detected identification codes to generate an invalid tag signal if a received signal is invalid;

    at least one second tag detector for detecting the identification code carried by the signal from tags in the areas, the detection range of said at least one second tag detector being substantially larger than said at least one first tag detector; and

    database means for holding informnation on respective persons or objects and said codes for tags being carried by respective persons or objects, and for identifying respective persons or objects using identification codes detected by said first and second detectors.

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