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Proceedings Paper

Temperature and stiffness correction of SAW devices for wireless strain sensing
Author(s): Irving J. Oppenheim; Nicola S. Carey; T.-L. Chin; Peng Zheng; David W. Greve
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Paper 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.

Paper Details

Date Published: 13 April 2011
PDF: 8 pages
Proc. SPIE 7981, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011, 79811F (13 April 2011); doi: 10.1117/12.880176
Show Author Affiliations
Irving J. Oppenheim, Carnegie Mellon Univ. (United States)
Nicola S. Carey, Carnegie Mellon Univ. (United States)
T.-L. Chin, Carnegie Mellon Univ. (United States)
Peng Zheng, Carnegie Mellon Univ. (United States)
David W. Greve, Carnegie Mellon Univ. (United States)


Published in SPIE Proceedings Vol. 7981:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011
Masayoshi Tomizuka, Editor(s)

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