VIRTUAL RFID-BASED TAG SENSOR
First Claim
1. A method for implementing a virtual sensor in an RFID tag reading system including an RFID reader and at least one RFID tag including tag memory in which sensor data, read from a sensor, is stored, the method comprising:
- (a) reading the sensor data from the tag memory;
(b) storing the sensor data in sensor cache memory in the reader;
(c) repeating steps (a) and (b) at a predetermined interval; and
(d) periodically updating the sensor data in the sensor cache memory, via predictive modeling software stored in and executed by the reader, to determine an estimated value for the sensor data from observed changes in the data.
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Accused Products
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.
129 Citations
31 Claims
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1. A method for implementing a virtual sensor in an RFID tag reading system including an RFID reader and at least one RFID tag including tag memory in which sensor data, read from a sensor, is stored, the method comprising:
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(a) reading the sensor data from the tag memory;
(b) storing the sensor data in sensor cache memory in the reader;
(c) repeating steps (a) and (b) at a predetermined interval; and
(d) periodically updating the sensor data in the sensor cache memory, via predictive modeling software stored in and executed by the reader, to determine an estimated value for the sensor data from observed changes in the data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 19, 20, 21)
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14. A method for implementing a virtual sensor in an RFID tag reading system including an RFID reader and at least one RFID tag including tag memory in which sensor data, read from a sensor, is stored, the method comprising:
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(a) periodically sampling sensor data and storing the data in the tag memory;
(b) reading the sensor data from the tag memory;
(c) storing the data thus read in sensor cache memory in the reader;
(d) periodically updating sensor data in the sensor cache memory using a predictive modeling technique;
(e) after a delay period has expired, again reading sensor data stored in the tag memory; and
(f) repeating steps (b) through (e) at a predetermined interval. - View Dependent Claims (15, 16, 17, 18)
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22. A method for implementing a virtual sensor in an RFID tag reading system including an RFID reader and a plurality of RFID tags, each of which periodically samples an associated sensor and stores sensor data thus sampled in a respective RFID tag memory, the method comprising:
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systematizing the plurality of RFID tags to form a grid;
reading the sensor data from the tag memory in each of the tags in the grid;
storing the sensor data thus read in sensor cache memory in the reader; and
periodically updating the sensor data in the sensor cache memory, using a predictive modeling technique, to determine an estimated value for the sensor data from observed changes in the data read from the sensors. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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30. A system for implementing a virtual sensor in an RFID tag reading system including an RFID tag that periodically samples a sensor and stores sampled sensor data in tag memory, the system comprising:
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an RFID reader including cache memory; and
predictive modeling software stored in the reader;
wherein the sensor data is;
read from the memory of the RFID tag by the reader;
stored in the cache memory in the reader; and
periodically updated in the cache memory, using the predictive modeling software executed by the reader. - View Dependent Claims (31)
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Specification