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Compensation method of propagating distance for guided wave

机译：导波传播距离的补偿方法

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摘要

Guided wave has been utilised in various manners for non-destructive evaluation and testing. The dispersion and attenuation characteristics of guided wave restrict and complicate the accurate estimation of echo propagation distance. The study focuses on how to reduce the estimation error of propagation distance caused by these characteristics. The propagation of guided wave with attenuation and dispersion characteristics is analytically modelled in general cases. The flight-time compensation technique is developed based on the analytical model of wave propagation and the algorithm of chirplet matching pursuit. Numerical simulations are given to verify the efficacy of the developed compensation method. Finally, this study demonstrates the use of experimentally measured data for echoes identification and propagation distance estimation.
机译：导波已经以各种方式用于无损评估和测试。导波的色散和衰减特性限制了回声传播距离的精确估计，并使之复杂化。研究重点在于如何减少由这些特性引起的传播距离的估计误差。一般情况下，具有衰减和色散特性的导波的传播都经过分析建模。基于波传播的解析模型和线性调频追赶算法，开发了飞行时间补偿技术。通过数值模拟验证了开发的补偿方法的有效性。最后，这项研究证明了将实验测量的数据用于回波识别和传播距离估计。

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