VIRTUAL RFID-BASED TAG SENSOR
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United States of America Patent
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app pub date -
Jun 21, 2007
filing date -
Dec 30, 2005
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Abandoned
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Abstract
A method for implementing a virtual sensor in an RFID tag reading system, including an RFID reader and at least one RFID tag having tag memory in which sensor data is stored. Initially, sensor data is read from the tag memory. The sensor data is then stored in sensor cache memory in the reader. Sensor data is accordingly read and stored at a predetermined interval. The sensor data in sensor cache memory is periodically updated, via predictive modeling software stored in and executed by the reader, to determine a present or future estimated value for the sensor data from observed changes in the data.
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