SYSTEMS AND METHODS FOR OBJECT LOCALIZATION AND PATH IDENTIFICATION BASED ON RFID SENSING
First Claim
1. A radio frequency identification (RFID) system for localizing an RFID tag, the system comprising:
- a plurality of radio frequency identification (RFID) tag readers;
a computer in signal communication with the plurality of RFID tag readers 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 composite semantic attribute to the RFID tag by;
assigning a first semantic attribute to a first oriented link;
assigning a second semantic attribute to a second oriented link;
defining the composite semantic attribute based on a combination of the first semantic attribute and the second semantic attribute;
determining that the RFID tag passed the first oriented link at a first time value;
determining that the RFID tag passed a second oriented link at a second time value; and
associating the composite semantic attribute to the RFID tag.
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Accused Products
Abstract
A networked radio frequency identification system includes a plurality of radio frequency identification (RFID) tag readers, a computer in signal communication with the RFID tag readers over a network, and a software module for storage on and operable by the computer that localizes RFID tags based on information received from the RFID tag readers using a network model having endpoints and oriented links. In an additional example, at least one of the RFID tag readers includes an adjustable configuration setting selected from RF signal strength, antenna gain, antenna polarization, and antenna orientation. In a further aspect, the system localizes RFID tags based on hierarchical threshold limit calculations. In an additional aspect, the system controls a locking device associated with an access point based on localization of an authorized RFID tag at the access point and reception of additional authorizing information from an input device.
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Citations
11 Claims
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1. A radio frequency identification (RFID) system for localizing an RFID tag, the system comprising:
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a plurality of radio frequency identification (RFID) tag readers; a computer in signal communication with the plurality of RFID tag readers 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 composite semantic attribute to the RFID tag by; assigning a first semantic attribute to a first oriented link; assigning a second semantic attribute to a second oriented link; defining the composite semantic attribute based on a combination of the first semantic attribute and the second semantic attribute; determining that the RFID tag passed the first oriented link at a first time value; determining that the RFID tag passed a second oriented link at a second time value; and associating the composite semantic attribute to the RFID tag. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification