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Proceedings Article

Temperature and stiffness correction of SAW devices for wireless strain sensing

[+] Author Affiliations
Irving J. Oppenheim, Nicola S. Carey, T.-L. Chin, Peng Zheng, David W. Greve

Carnegie Mellon Univ. (USA)

Proc. SPIE 7981, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011, 79811F (April 13, 2011); doi:10.1117/12.880176
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From Conference Volume 7981

  • Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011
  • Masayoshi Tomizuka
  • San Diego, California, USA | March 06, 2011

abstract

Surface acoustic wave (SAW) devices are solid-state components in which a wave propagates along the surface of a piezoelectric material. Changes in strain or temperature cause shifts in the acoustic wave speed and/or the path length, enabling SAW devices to act as sensors. We present experimental studies on lithium niobate SAW devices acting as passively-powered devices. Sensitivity, reproducibility, and linearity are excellent when measuring strain at constant temperature, but the devices are also sensitive to temperature changes. We show experimental results of strain measurement incorporating temperature compensation.

© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Citation

Irving J. Oppenheim ; Nicola S. Carey ; T.-L. Chin ; Peng Zheng and David W. Greve
"Temperature and stiffness correction of SAW devices for wireless strain sensing", Proc. SPIE 7981, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011, 79811F (April 13, 2011); doi:10.1117/12.880176; http://dx.doi.org/10.1117/12.880176


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