Passive RFID assisted active RFID tag
First Claim
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1. A radiofrequency identification (RFID) device comprising:
- an active RFID tag that includes a power source and tag identification (TID) data unique to the active RFID tag;
a passive-RFID tag reader, the passive-RFID tag reader electrically coupled to the power source of the active RFID tag, wherein the active RFID tag is configured to;
combine the TID data with data received from the passive-RFID tag reader into a combined data file; and
transmit the combined data file to an active tag reader; and
an optical detector electrically coupled to the active RFID tag and the passive-RFID tag reader, the optical detector configured to;
optically detect a condition; and
output location data to the active RFID tag based on the optically detected condition.
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Abstract
A radiofrequency identification (RFID) device includes an active RFID tag that includes a power source and a passive RFID tag reader, the passive RFID tag reader electrically coupled to the power source of the active RFID tag.
16 Citations
20 Claims
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1. A radiofrequency identification (RFID) device comprising:
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an active RFID tag that includes a power source and tag identification (TID) data unique to the active RFID tag; a passive-RFID tag reader, the passive-RFID tag reader electrically coupled to the power source of the active RFID tag, wherein the active RFID tag is configured to; combine the TID data with data received from the passive-RFID tag reader into a combined data file; and transmit the combined data file to an active tag reader; and an optical detector electrically coupled to the active RFID tag and the passive-RFID tag reader, the optical detector configured to; optically detect a condition; and output location data to the active RFID tag based on the optically detected condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of determining the location of an object coupled to a radiofrequency identification device, the method comprising:
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interrogating a passive tag using a passive-RFID tag reader and receiving electronic product code (EPC) data from the passive tag; transmitting the EPC data to an active RFID tag that is coupled to the passive RFID tag reader; optically detecting a condition using an optical detector electrically coupled to the active RFID tag and the passive-RFID tag reader; outputting location data from the optical detector to the active RFID tag based on the optically detected condition; combining, at the active RFID tag, the EPC data with tag identification (TID) data unique to the active RFID tag to form a combined data file, wherein the TID data includes the location data; transmitting the combined data file from the active RFID tag to an active RFID tag reader; and determining the location of the object using the EPC data and TID data. - View Dependent Claims (11, 12, 13, 14)
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15. A system for determining the location of an object using radiofrequency identification (RFID), comprising:
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an RFID device, including an active RFID tag that includes a power source, a passive-RFID tag reader electrically coupled to the power source of the active RFID tag and an optical detector electrically coupled to the active RFID tag and the passive-RFID tag reader; wherein the optical detector is configured to optically detect a condition and output location data to the active RFID tag based on the optically detected condition;
,wherein the RFID device is configured to combine electronic product code (EPC) data received from the passive-RFID tag reader and tag identification (TID) data unique to the active RFID tag into a combined data file and transmit the combined data file, the TID data including the location data; and an active RFID reader configured to receive the combined data file and determine a location of the RFID device based upon the received EPC data and active RFID data. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification