A thermal insulation method for a piezoelectric transducer

This study deals with the sources of signal distortion of a piezoelectric transducer heated by measured gas flow. These signal distortions originate from both unloading of preload on a piezocrystal because of expansion of a diaphragm in the test apparatus and the pyroelectric effect of a heated piez...

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Published in:Chinese science bulletin 2007-09, Vol.52 (17), p.2305-2309
Main Authors: Wu, Song, Chen, Hong, Gu, JiaHua, Yu, HongRu
Format: Article
Language:English
Subjects:
信号失真
压电式换能器
瞬时压力测量
绝热方法
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description This study deals with the sources of signal distortion of a piezoelectric transducer heated by measured gas flow. These signal distortions originate from both unloading of preload on a piezocrystal because of expansion of a diaphragm in the test apparatus and the pyroelectric effect of a heated piezoelectric crystal. A plastic film on the diaphragm of the transducer can effectively insulate the diaphragm and the piezocrystal within transducer from heating by gas flow, eliminating the sources of distortion. A method for evaluating the thickness of the film is proposed.
doi_str_mv 10.1007/s11434-007-0366-y
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subjects 信号失真
压电式换能器
瞬时压力测量
绝热方法
title A thermal insulation method for a piezoelectric transducer
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