Remote measurement of motion employing RFID
First Claim
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1. A measurement system, comprising:
- a transceiver configured to send and receive radio frequency signals;
a first transponder configured to receive radio frequency signals from the transceiver and to send radio frequency signals to the transceiver when in range of the transceiver, the first transponder comprising an accelerometer motion sensor;
wherein the transceiver is configured to send an activation signal to the first transponder thereby enabling the accelerometer motion sensor to make a motion measurement and wherein the first transponder makes and holds the motion measurement while outside the range of the transceiver.
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Abstract
A system and method for making measurements using and RFID system includes a transceiver, a transponder and a sensor configured within the transponder. The transceiver is configured to send and receive radio frequency signals. The transponder is configured to receive radio frequency signals from the transceiver and to send radio frequency signals to the transceiver. The transponder includes a sensor. The transceiver is configured to send an activation signal to the transponder thereby enabling the first transponder sensor to make a vibration measurement and to hold the measurement.
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Citations
19 Claims
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1. A measurement system, comprising:
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a transceiver configured to send and receive radio frequency signals; a first transponder configured to receive radio frequency signals from the transceiver and to send radio frequency signals to the transceiver when in range of the transceiver, the first transponder comprising an accelerometer motion sensor; wherein the transceiver is configured to send an activation signal to the first transponder thereby enabling the accelerometer motion sensor to make a motion measurement and wherein the first transponder makes and holds the motion measurement while outside the range of the transceiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of making a measurement comprising:
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sending radio frequency signals from a transceiver to a transponder while the transponder is within range of the transceiver; making a vibration measurement with an accelerometer sensor within the transponder while the transponder is outside the range of the transceiver; and holding the vibration measurement within the transponder. - View Dependent Claims (12, 13)
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14. A method of making a measurement comprising:
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sending radio frequency signals from a transceiver to a transponder; charging an analog circuit within the transponder from the radio frequency signals received from the transceiver; transporting the transponder outside the range of the transceiver; activating an accelerometer within the transponder using the charged analog circuit; making a measurement with the accelerometer; transporting the transponder back into the range of the transceiver; interrogating the transponder with the transceiver via radio frequency signals such that the transceiver receives the measurement made by the accelerometer. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification