SYSTEMS AND METHODS FOR OBJECT LOCALIZATION AND PATH IDENTIFICATION BASED ON RFID SENSING
First Claim
1. A radio frequency system comprising:
- a first RF tag comprising a radio frequency transmitter logic coupled to a first antenna having a first set of radiating elements forming a radiation pattern;
a second RF tag comprising a radio frequency receiver logic coupled to a second antenna having a second set of radiating elements forming a radiation pattern;
a sensor;
a computer system coupled with the first and the second RF tags;
a plurality of semantic attributes stored in the computer system;
the computer system being configured to determine a location for the second RF tag based on a signal received by the second RF tag from the first RF tag;
the computer system further being configured to infer a first semantic attribute from among a plurality of semantic attributes based on an input from sensor and the determined location for the second RF tag; and
wherein the computer system instructs at least one of the first RF tag and the second RF tag to adjust the radiation pattern of the first RF tag or the radiation pattern of the second RF tag based on the first semantic attribute.
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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
25 Claims
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1. A radio frequency system comprising:
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a first RF tag comprising a radio frequency transmitter logic coupled to a first antenna having a first set of radiating elements forming a radiation pattern; a second RF tag comprising a radio frequency receiver logic coupled to a second antenna having a second set of radiating elements forming a radiation pattern; a sensor; a computer system coupled with the first and the second RF tags; a plurality of semantic attributes stored in the computer system; the computer system being configured to determine a location for the second RF tag based on a signal received by the second RF tag from the first RF tag; the computer system further being configured to infer a first semantic attribute from among a plurality of semantic attributes based on an input from sensor and the determined location for the second RF tag; and wherein the computer system instructs at least one of the first RF tag and the second RF tag to adjust the radiation pattern of the first RF tag or the radiation pattern of the second RF tag based on the first semantic attribute. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A radio frequency system comprising:
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a first radio frequency tag and a second radio frequency tag; wherein the first radio frequency tag includes a radio frequency transmitter logic and a first antenna coupled to the radio frequency transmitter logic, wherein the first antenna comprises a first set of radiating elements; wherein the second radio frequency tag includes a radio frequency receiver logic and a second antenna coupled to the radio frequency receiver logic, wherein the second antenna comprises a second set of radiating elements; a sensor; a computer system coupled with the first and the second radio frequency tags; the computer system storing a plurality of semantic attributes; the computer system being configured to determine a location for the second radio frequency tag based on a signal received by the second radio frequency tag from the first radio frequency tag; wherein the computer system is configured to infer a first semantic attribute from among a plurality of semantic attributes based on an input from sensor and the determined location for the second radio frequency tag; and wherein the computer system instructs at least one of the first and second radio frequency tags to tune specific radiating elements from among the first antenna or the second antenna based on the first semantic attribute. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification