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 system communicatively coupled with the plurality of RFID tag readers over a network;
a memory associated with the computer system, the memory storing a network semantic 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 network semantic model further comprising at least one semantic attribute associated with at least one of the oriented links;
at least one sensor;
the computer system being configured to localize the RFID tag based on data received from the RFID tag readers;
the computer system further being configured to associate an RFID tag rating with the RFID tag;
the computer system further being configured to adjust the network semantic model as a function of a measured parameter from the sensor;
the computer system further being configured to determine that the RFID tag has traversed the oriented link and further to adjust the RFID tag rating associated with the RFID tag based on the determination that the RFID tag has traversed the oriented link, the adjusted RFID tag rating further being a function of the semantic attribute associated with the oriented link.
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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
9 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 system communicatively coupled with the plurality of RFID tag readers over a network; a memory associated with the computer system, the memory storing a network semantic 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 network semantic model further comprising at least one semantic attribute associated with at least one of the oriented links; at least one sensor; the computer system being configured to localize the RFID tag based on data received from the RFID tag readers; the computer system further being configured to associate an RFID tag rating with the RFID tag; the computer system further being configured to adjust the network semantic model as a function of a measured parameter from the sensor; the computer system further being configured to determine that the RFID tag has traversed the oriented link and further to adjust the RFID tag rating associated with the RFID tag based on the determination that the RFID tag has traversed the oriented link, the adjusted RFID tag rating further being a function of the semantic attribute associated with the oriented link. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification