RFID sensor device based on pulse-processing
OwnerBaohua Qiinventor
Life of this patent
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Abstract
A radio frequency identification device having sensing elements incorporated in the clock generators of its tags, which generate a leading code and an identification code. In the interrogator, the leading code is detected and its pulse width is measured for calculating sensing values and the baud rate in receiving the identification code. No analog to digital converter is needed in digitizing sensing values and only discrete signals exist in sensing signal generation and communication. The tag device is insensitive to variations in its power supply voltage obtained from a continuous wave RF carrier.
Claims20
A radio frequency identification tag device, comprising:
- a clock generator with sensing elements incorporated;
- a logic circuit for generating a serial code sequence;
- a radio frequency tuned circuit;
- a circuit for loading and unloading said radio frequency tuned circuit;
- a circuit for providing power for said radio frequency identification tag device by converting radio frequency continuous wave signals into direct current power.
A radio frequency interrogator device, comprising
- a circuit that detects a code sequence generated by a radio frequency tag device;
- a pulse processing unit for measuring the width of the pulses in said code sequence;
- a sensing value processing unit that calculates sensing values based on the pulse width measured by said pulse processing unit;
- a continuous wave generation circuit;
A system for identifying and reading a sensor value, comprising:
- a radio frequency identification device including a clock generator with sensing elements incorporated, a logic circuit for generating a serial code sequence, a radio frequency tuned circuit, a circuit for loading and unloading said radio frequency tuned circuit, and a circuit for providing power for said radio frequency identification tag device by converting radio frequency continuous wave signals into direct current power;
- a radio frequency interrogator device having a circuit that detects a code sequence generated by a radio frequency tag device, a pulse processing unit for measuring the width of the pulses in said code sequence, a sensing value processing unit that calculates sensing values based on the pulse width measured by said pulse processing unit, and a continuous wave generation circuit;
- said continuous wave generated by said radio frequency interrogator device has a frequency compatible with said tuned circuit;
Dependencies are inferred from the claim text.