Passive radio frequency data logger
First Claim
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1. A method comprising:
- receiving, using a passive RFID tag, a first radio frequency transmission including first identification data configured to identify a sender of the first radio frequency transmission;
using the first radio frequency transmission to generate first electrical energy;
storing the first identification data in a log data storage using the first electrical energy;
receiving a second radio frequency transmission including second identification data configured to identify a sender of the second radio frequency transmission;
using the second radio frequency transmission to generate second electrical energy;
storing the second identification data in the log data storage using the second electrical energy;
switching from a logging mode to an upload mode, where switching from the logging mode to the upload mode includes using a circuit to change a state value stored in a static storage location, the state value being a digital value indicative of the logging mode; and
uploading the first identification data and the second identification data stored in the log data storage, in the upload mode.
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Abstract
A radio frequency identification device is configured as a data logger. In a logging mode the radio frequency identification device logs information received from a transmitter. In an upload mode the radio frequency identification device is configured to upload to a receiver logged information and/or information identifying the radio frequency identification device. Optionally, the logging mode is used when there is insufficient power to send a readable response signal to the transmitter.
87 Citations
30 Claims
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1. A method comprising:
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receiving, using a passive RFID tag, a first radio frequency transmission including first identification data configured to identify a sender of the first radio frequency transmission; using the first radio frequency transmission to generate first electrical energy; storing the first identification data in a log data storage using the first electrical energy; receiving a second radio frequency transmission including second identification data configured to identify a sender of the second radio frequency transmission; using the second radio frequency transmission to generate second electrical energy; storing the second identification data in the log data storage using the second electrical energy; switching from a logging mode to an upload mode, where switching from the logging mode to the upload mode includes using a circuit to change a state value stored in a static storage location, the state value being a digital value indicative of the logging mode; and uploading the first identification data and the second identification data stored in the log data storage, in the upload mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification