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SYSTEMS AND METHODS FOR OBJECT LOCALIZATION AND PATH IDENTIFICATION BASED ON RFID SENSING

  • US 20130278389A1
  • Filed: 06/19/2013
  • Published: 10/24/2013
  • Est. Priority Date: 07/27/2007
  • Status: Active Grant
First Claim
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1. A radio frequency identification (RFID) system for localizing an RFID tag, the system comprising:

  • a plurality of radio frequency identification (RFID) tag readers;

    at least one sensing entity;

    a computer in signal communication with the plurality of RFID tag readers and at least one sensing entity over a network;

    a memory associated with the computer, the memory storing a network model having a plurality of endpoints and oriented links between the endpoints, wherein the endpoints are associated with physical locations in space, each of the endpoints having associated with it one or more radio frequency identification (RFID) tag readers;

    the computer being configured to operate a software module that localizes the RFID tag based on data received from the RFID tag readers;

    the software module further being configured to associate a semantic attribute the RFID tag by;

    mapping one of the oriented links to a source endpoint at a first physical location and a destination endpoint at a second physical location;

    determining that the RFID tag is present at the source endpoint at a first time value and that the RFID tag is present at the destination endpoint at a second time value;

    determining that the RFID tag has traversed the oriented link from the source endpoint to arrive at the destination endpoint, including a path of travel and a direction assigned to the oriented link;

    determining that a parameter from at least one sensing entity sampled between the first time value and the second time value is within a predetermined measurement interval; and

    associating the semantic attribute to the RFID tag based on the determination that the RFID tag has traversed the oriented link and the determined parameter.

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