Power conserving active RFID label
First Claim
1. A radio frequency identification (RFID) tag comprising:
- a substrate;
an antenna on the substrate; and
an integrated circuit operably coupled to a temperature sensor and to the antenna to receive a time interval from a RFID interrogator, the time interval indicating a time when a temperature and a battery voltage associated with the RFID tag are measured, wherein the integrated circuit configured to increase the time interval in the event that a value corresponding to the measured battery voltage is less than a predetermined voltage such that the temperature is measured less frequently than when the battery voltage is greater than or equal to the predetermined voltage.
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0 Petitions
Accused Products
Abstract
Methods and apparatus, including computer program products, for a power conserving active RFID label. A system for performing radio frequency (RF) communications includes a radio frequency identification (RFID) tag attached to one or more items to be tracked, the RFID tag configured to receive a request and a time interval indicating a time for determining a temperature and a battery voltage, and to adjust the time interval at a time of determining the temperature and the battery voltage if the detected voltage is less than a predetermined voltage, and an interrogator communicatively coupled to one or more antennas to transmit one or more requests to the RFID tag and to receive one or more responses, at least one response including a time, temperature and battery voltage.
18 Citations
14 Claims
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1. A radio frequency identification (RFID) tag comprising:
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a substrate; an antenna on the substrate; and an integrated circuit operably coupled to a temperature sensor and to the antenna to receive a time interval from a RFID interrogator, the time interval indicating a time when a temperature and a battery voltage associated with the RFID tag are measured, wherein the integrated circuit configured to increase the time interval in the event that a value corresponding to the measured battery voltage is less than a predetermined voltage such that the temperature is measured less frequently than when the battery voltage is greater than or equal to the predetermined voltage. - View Dependent Claims (2, 3)
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4. A radio frequency identification (RFID) interrogator comprising:
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one or more antennas; a receiver communicatively coupled to at least one of the one or more antennas to receive a response from a radio frequency identification (RFID) tag, the response including a time when a temperature and a battery voltage associated with the RFID tag were measured, and values corresponding to the measured temperature and battery voltage; a transmitter communicatively coupled to at least one of the one or more antennas to transmit requests; and a control unit communicatively coupled to the transmitter and the receiver, wherein the receiver is configured to receive the response and increase a time interval indicating a time for measuring the temperature and the battery voltage associated with the RFID tag in the event that the value corresponding to the measured battery voltage in the response is less than a predetermined voltage such that the temperature is measured less frequently than when the measured battery voltage is greater than or equal to the predetermined voltage. - View Dependent Claims (5, 6, 7)
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8. A system for performing radio frequency (RF) communications, the system comprising:
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a radio frequency identification (RFID) tag attached to one or more items to be tracked, the RFID tag being configured to receive a request and a time interval indicating a time for measuring a temperature and a battery voltage, associated with the RFID tag, and to increase the time interval in the event that a value corresponding to the measured battery voltage is less than a predetermined voltage such that the temperature is measured less frequently than when the battery voltage is greater than or equal to the predetermined voltage; and an interrogator communicatively coupled to one or more antennas to transmit one or more requests to the RFID tag and to receive one or more responses, at least one response including a time, when the temperature and the battery voltage associated with the RFID tag were measured, and values corresponding to the measured temperature and battery voltage. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification