Strain sensor development

Kevin B. McKenney; Shoko Yoshikawa; Marco Giovanardi

doi:10.1117/12.472643

27 June 2002 Strain sensor development

Kevin B. McKenney, Shoko Yoshikawa, Marco Giovanardi

Proceedings Volume 4694, Smart Structures and Materials 2002: Smart Sensor Technology and Measurement Systems; (2002) https://doi.org/10.1117/12.472643
Event: SPIE's 9th Annual International Symposium on Smart Structures and Materials, 2002, San Diego, California, United States

Abstract

The application of PZN-PT single crystal piezoceramic in low-cost, high-resolution strain sensors was examined using an ACX QuickPack PZT strain sensor as a basis for the new design, with active structural control of precision machinery as the target application. A study was performed to determine the influence of mechanical feedthrough on the sensor signal. Mechanical feedthrough appears when an actuator is close to the sensor and near-field effects dominate the actuator-to-sensor transfer function. Both voltage follower and charge amplifier signal conditioning electronics were tested, and the benefits of each on the nonlinear characteristics of PZT and PZN-PT were analyzed. Finally, the coherence between the sensor characteristics was analyzed. The results show that the QuickPack strain sensor compares favorably with some higher cost off-the-shelf products in terms of noise and resolution, at a significantly lower cost. The single crystal sensors show significantly higher sensitivity than their conventional multi-crystalline counterparts, though less than expected due to the softer base material.

Citation Download Citation

Kevin B. McKenney, Shoko Yoshikawa, and Marco Giovanardi "Strain sensor development", Proc. SPIE 4694, Smart Structures and Materials 2002: Smart Sensor Technology and Measurement Systems, (27 June 2002); https://doi.org/10.1117/12.472643

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