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A Novel Algorithm of Time Delay Estimation for the Ultrasonic Multi-mode Lamb Waves

机译:超声多模兰姆波的时延估计新算法

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摘要

To estimate the time delay of Lamb wave in NDT, a novel algorithm based on the Chirplet dispersion transform which can be used to estimate the time delay of multi-mode Lamb waves is proposed in this paper. The estimated results of time delay for experiment signal show that the novel algorithm can not only represent dispersion characteristics of multi-mode Lamb waves but also improve the resolution of time delay estimation of multi-mode Lamb waves in the non-prior knowledge aluminum thin plate.
机译:为了估计无损检测中兰姆波的时延,提出了一种基于Chirplet色散变换的新算法,该算法可用于估计多模兰姆波的时延。实验信号的时延估计结果表明,该算法不仅可以表示多模兰姆波的色散特性,而且可以提高非先验铝薄板中多模兰姆波的时延估计的分辨率。 。

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