METHODS AND SYSTEMS OF DETERMINING PHYSICAL CHARACTERISTICS ASSOCIATED WITH OBJECTS TAGGED WITH RFID TAGS
First Claim
1. A method comprising:
- receiving a first electromagnetic signal from a radio frequency identification (RFID) tag coupled to an object;
calculating a first received signal strength indication (RSSI) based on the first electromagnetic signal;
receiving a second electromagnetic signal from the RFID tag;
calculating a second RSSI based on the second electromagnetic signal; and
determining whether the object is moving using, at least in part, the first and second RSSI.
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Accused Products
Abstract
Methods and systems of determining physical characteristics associated with objects tagged with Radio Frequency Identification (RFID) tags. At least some of the illustrative embodiments are methods comprising making a first reading of a RFID tag coupled to an object (an electromagnetic signal received from the RFID tag having a first received signal strength indication (RSSI)), making a second reading of the RFID tag (an electromagnetic signal received from the RFID tag having a second RSSI), and a determining whether the object is moving using (at least in part) the first and second RSSI. Other illustrative embodiments, may determine (in addition to or in place of determining movement) orientation of the object based, at least in part, on the electromagnetic signals.
65 Citations
26 Claims
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1. A method comprising:
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receiving a first electromagnetic signal from a radio frequency identification (RFID) tag coupled to an object; calculating a first received signal strength indication (RSSI) based on the first electromagnetic signal; receiving a second electromagnetic signal from the RFID tag; calculating a second RSSI based on the second electromagnetic signal; and determining whether the object is moving using, at least in part, the first and second RSSI. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system comprising:
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a frequency identification (RFID) tag configured to couple to an object; a reading antenna in operational relationship to the RFID tag; and a reader circuit coupled to the reading antenna, the reader circuit configured to generate a received signal strength indication (RSSI) for each interrogation of the RFID tag; wherein the system is configured to determine whether the RFID tag is moving based on RSSI as between two interrogations of the RFID tag. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification