Temperature and stiffness correction of SAW devices for wireless strain sensing

Irving J. Oppenheim; Nicola S. Carey; T.-L. Chin; Peng Zheng; David W. Greve

doi:10.1117/12.880176

13 April 2011 Temperature and stiffness correction of SAW devices for wireless strain sensing

Irving J. Oppenheim, Nicola S. Carey, T.-L. Chin, Peng Zheng, David W. Greve

Proceedings Volume 7981, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2011; 79811F (2011) https://doi.org/10.1117/12.880176
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2011, San Diego, California, United States

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.

Citation Download 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 (13 April 2011); https://doi.org/10.1117/12.880176

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