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Proceedings Paper

Sensor self-diagnostics for piezoelectric transducers operating in harsh temperature environments
Author(s): Yan Zheng; Christian Martinez; Daniel Easton; Gyuhae Park; Kevin Farinholt
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Paper Abstract

In many condition and health monitoring applications, it is necessary to be able to differentiate between response characteristics that result from structural and sensor specific damage types. An investigation is presented in this paper that considers the effectiveness of sensor self-diagnostic techniques for piezoelectric-based transducers that operate in harsh temperature environments. The motivation behind this work is to develop a method for interrogating sensor health when embedded within high-cost research systems. The theoretical basis for this approach is first presented, along with several analytical test cases in which temperature effects are examined within models of the piezoelectric transducer. Following this, a series of experiments are presented in which transducers with varying types and degrees of damage are subject to repeated temperature cycling from cryogenic to room temperature. The results of this study indicate that capacitive-based self-diagnostic techniques are capable of detecting both sensor delamination and cracking at room and liquid nitrogen temperatures.

Paper Details

Date Published: 28 April 2011
PDF: 7 pages
Proc. SPIE 7979, Industrial and Commercial Applications of Smart Structures Technologies 2011, 79790O (28 April 2011); doi: 10.1117/12.882009
Show Author Affiliations
Yan Zheng, Stanford Univ. (United States)
Christian Martinez, Rice Univ. (United States)
Daniel Easton, Atomic Weapons Establishment plc (United Kingdom)
Gyuhae Park, Los Alamos National Lab. (United States)
Kevin Farinholt, Los Alamos National Lab. (United States)

Published in SPIE Proceedings Vol. 7979:
Industrial and Commercial Applications of Smart Structures Technologies 2011
Kevin M. Farinholt; Steve F. Griffin, Editor(s)

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