Mr. Ke Sun Profile

Ke Sun

at Univ de Puerto Rico Mayagüez

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Proceedings Article | 11 April 2006 Paper

Thick film wireless and powerless strain sensor

Yi Jia, Ke Sun

Proceedings Volume 6174, 61740Z (2006) https://doi.org/10.1117/12.660365

KEYWORDS: Sensors, Electrodes, Capacitors, Antennas, Capacitance, Dielectrics, Polymers, Ferroelectric polymers, Electromagnetism, Prototyping

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The development of an innovative wireless strain sensing technology has a great potential to extend its applications in manufacturing, civil engineering and aerospace industry. This paper presents a novel wireless and powerless strain sensor with a multi-layer thick film structure. The sensor employs a planar inductor (L) and capacitive transducer (C) resonant tank sensing circuit, and a strain sensitive material of a polarized polyvinylidene fluoride (PVDF) piezoelectric thick film to realize the wireless strain sensing by strain to frequency conversion and to receive radio frequency electromagnetic energy for powering the sensor. The prototype sensor was designed and fabricated. The results of calibration on a strain constant cantilever beam show a great linearity and sensitivity about 0.0013 in a strain range of 0-0.018.

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