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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >On-Line Corrosion Monitoring of Plate Structures Based on Guided Wave Tomography Using Piezoelectric Sensors
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On-Line Corrosion Monitoring of Plate Structures Based on Guided Wave Tomography Using Piezoelectric Sensors

机译：基于压电传感器的导波层析成像的板结构在线腐蚀监测

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摘要

Corrosion is a major safety and economic concern to various industries. In this paper, a novel ultrasonic guided wave tomography (GWT) system based on self-designed piezoelectric sensors is presented for on-line corrosion monitoring of large plate-like structures. Accurate thickness reconstruction of corrosion damages is achieved by using the dispersive regimes of selected guided waves and a reconstruction algorithm based on full waveform inversion (FWI). The system makes use of an array of miniaturised piezoelectric transducers that are capable of exciting and receiving highly dispersive A0 Lamb wave mode at low frequencies. The scattering from transducer array has been found to have a small effect on the thickness reconstruction. The efficiency and the accuracy of the new system have been demonstrated through continuous forced corrosion experiments. The FWI reconstructed thicknesses show good agreement with analytical predictions obtained by Faraday’s law and laser measurements, and more importantly, the thickness images closely resemble the actual corrosion sites.
机译：腐蚀是各个行业关注的主要安全和经济问题。本文提出了一种基于自行设计的压电传感器的新型超声波导波层析成像（GWT）系统，用于在线监测大型板状结构。通过使用所选导波的色散范围和基于全波形反演（FWI）的重建算法，可以实现腐蚀破坏的精确厚度重建。该系统利用了一系列微型压电换能器，这些换能器能够在低频下激发和接收高度分散的A0 Lamb波模式。已经发现来自换能器阵列的散射对厚度重建影响很小。通过连续的强制腐蚀实验证明了新系统的效率和准确性。 FWI重建的厚度与通过法拉第定律和激光测量获得的分析预测高度吻合，更重要的是，厚度图像与实际腐蚀部位非常相似。

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