In situ health monitoring of piezoelectric sensors
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United States of America Patent
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Mar 19, 2013
Grant Date -
Apr 8, 2010
app pub date -
Sep 24, 2009
filing date -
Oct 3, 2008
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Abstract
An in situ health monitoring apparatus may include an exciter circuit that applies a pulse to a piezoelectric transducer and a data processing system that determines the piezoelectric transducer's dynamic response to the first pulse. The dynamic response can be used to evaluate the operating range, health, and as-mounted resonance frequency of the transducer, as well as the strength of a coupling between the transducer and a structure and the health of the structure.
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