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RFID system for locating people, objects and things

  • US 20050270158A1
  • Filed: 05/26/2005
  • Published: 12/08/2005
  • Est. Priority Date: 05/28/2004
  • Status: Active Grant
First Claim
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1. A monitoring and location system for mobile objects, the system comprising:

  • a control center to monitor the movement of mobile objects to and from a prescribed local area and a prescribed wide area;

    a separate RFID tag for each mobile object of a group being monitored;

    each RFID tag having a unique electronic indicia stored thereon for transmission by a radio frequency signal upon request from an RFID interrogation unit;

    wherein the prescribed local areas comprise a plurality of zones which include egress zones and ingress zones, each zone having its own RFID interrogation unit for monitoring the ingress and egress, respectively, of its own group of RFID tags; and

    wherein, when an RFID tag has egressed or ingressed one of the zones, said RFID transmits its unique electronic indicia to the RFID interrogation unit of one of the zones, and when the RFID interrogation unit has received the indicia, the RFID interrogation unit transmits a signal including such indicia to the control center.

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