RFID TRACKING
First Claim
1. An RFID sensor tag comprising:
- a processor;
a power source;
an RF transceiver operably associated with the processor;
one or more sensors accessible to the processor via a sensor interface; and
at least one memory device, operably associated with the processor,wherein the memory device contains program instructions accessible to, and executable by, the processor to cause the RFID sensor tag to implement a method comprising steps of;
entering a low power-consumption state;
upon satisfaction of a predetermined condition, entering a medium power-consumption state for performing sensor measurements via the one or more sensors;
upon detecting an RF signal via the RF transceiver, entering a high power-consumption state for engaging in RF communications with an RF signal source; and
upon completion of RF communications or sensor measurements, re-entering the low power-consumption state.
2 Assignments
0 Petitions
Accused Products
Abstract
An RFID sensor tag includes a processor, a power source, an RF transceiver, one or more sensors accessible to the processor via a sensor interface, and at least one memory device. In one example, the tag is configured to operate in a low power-consumption state, a medium power-consumption state in which sensor measurements are performed, and a high power-consumption state used when engaged in RF communications. In another example, power consumption and memory usage are reduced by configuring the tag to record sensor data only upon satisfaction of a predetermined condition. In a further example, the tag is configured to respond to an RF interrogation signal only when the signal includes an instruction in accordance with a predetermined communications protocol. In another example, the tag is configured, upon interrogation, to confirm whether new recorded sensor data is available, to minimise transmission in the event that no new data is available.
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Citations
19 Claims
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1. An RFID sensor tag comprising:
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a processor; a power source; an RF transceiver operably associated with the processor; one or more sensors accessible to the processor via a sensor interface; and at least one memory device, operably associated with the processor, wherein the memory device contains program instructions accessible to, and executable by, the processor to cause the RFID sensor tag to implement a method comprising steps of; entering a low power-consumption state; upon satisfaction of a predetermined condition, entering a medium power-consumption state for performing sensor measurements via the one or more sensors; upon detecting an RF signal via the RF transceiver, entering a high power-consumption state for engaging in RF communications with an RF signal source; and upon completion of RF communications or sensor measurements, re-entering the low power-consumption state. - View Dependent Claims (2, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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3. An RFID sensor tag comprising:
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a processor; a power source; an RF transceiver operably associated with the processor; one or more sensors accessible to the processor via a sensor interface; and at least one memory device, operably associated with the processor, wherein the memory device contains program instructions accessible to, and executable by, the processor to cause the RFID sensor tag to implement a method comprising steps of; upon satisfaction of a predetermined condition, reading at least one sensor value from the one or more sensors; and storing the sensor value in a memory of the RFID sensor tag, along with information associated with the predetermined condition.
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4. An RFID sensor tag comprising:
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a processor; a power source; an RF transceiver operably associated with the processor; one or more sensors accessible to the processor via a sensor interface; and at least one memory device, operably associated with the processor, wherein the memory device contains program instructions accessible to, and executable by, the processor to cause the RFID sensor tag to implement a method comprising steps of; detecting an RF signal at the RF transceiver; determining whether the detected RF signal comprises an instruction in accordance with a predetermined communications protocol; and providing a corresponding response only in the event that the detected RF signal comprises an instruction in accordance with the predetermined communications protocol.
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5. An RFID sensor tag comprising:
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a processor; a power source; an RF transceiver operably associated with the processor; one or more sensors accessible to the processor via a sensor interface; and at least one memory device, operably associated with the processor, wherein the memory device contains program instructions accessible to, and executable by, the processor to cause the RFID sensor tag to implement a method comprising steps of; receiving an RF signal comprising an instruction in accordance with a predetermined communications protocol; transmitting an RF signal comprising a response indicative of availability of recorded sensor data; receiving an RF signal comprising an instruction to transmit recorded sensor data, in accordance with the predetermined communications protocol; and transmitting an RF signal comprising sensor data recorded in the memory. - View Dependent Claims (18, 19)
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Specification