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首页> 外文期刊>Ultrasonics, Ferroelectrics and Frequency Control, IEEE Transactions on >Piezoelectric transducer self-diagnosis under changing environmental and structural conditions
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Piezoelectric transducer self-diagnosis under changing environmental and structural conditions

机译：不断变化的环境和结构条件下的压电换能器自诊断

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摘要

Surface-mountable wafer-type piezoelectric transducers using lead zirconate titanate (PZT) are widely used to generate and sense guided waves for nondestructive evaluation and structural health monitoring applications. However, little attention has been paid to monitoring PZT transducer integrity, despite possibly being the weakest link in the entire monitoring system. In this study, PZT transducer self-diagnostic techniques, which enable a single PZT transducer to examine its own integrity, are developed based on a time-reversal process; the effects of temperature and structural condition variations are explicitly considered. Two PZT self-diagnosis indices are proposed which allow debonded and cracked PZT conditions to be identified and distinguished from changing environmental and structural conditions. First, the proposed self-diagnosis schemes are theoretically formulated, and then the feasibility of the proposed schemes is validated through simulations and experimental tests under varying temperature and structural conditions.
机译：使用锆钛酸铅（PZT）的可表面安装的晶片型压电换能器被广泛用于生成和感测导波，用于无损评估和结构健康监测应用。但是，尽管可能是整个监视系统中最薄弱的环节，但对监视PZT传感器完整性的关注却很少。在这项研究中，基于时间反转过程开发了PZT传感器自诊断技术，该技术使单个PZT传感器能够检查其自身的完整性。明确考虑了温度和结构条件变化的影响。提出了两种PZT自诊断指标，它们可以识别脱胶和破裂的PZT条件，并与变化的环境和结构条件区分开。首先，从理论上提出了所提出的自诊断方案，然后通过在不同温度和结构条件下的仿真和实验测试，验证了所提出方案的可行性。

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