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Robust non-destructive measurement system for extraction of ultrasonic wave parameters using the prism technique

机译：使用棱镜技术提取超声波参数的稳健的无损测量系统

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摘要

In this paper we propose a measurement system to evaluate the elastic constants of materials using only one experiment. This measurement system is based on the ultrasonic prism technique for the nondestructive measurement of both compressional and shear waves, and on the matching pursuit combined with genetic algorithms (MP-GA) to estimate these two backscattered echo waves. Under this framework, samples are realized in prism-shaped forms using a special molding box. Then, the MP-GA method is used to derive the time of flight of the measured data by a deconvolution process. The backscattered echoes are constructed using a parametric model-based vector for which the corresponding parameters are closely related to the physical properties of the ultrasonic signal propagating through the investigated material. The effectiveness of the measurement system is approved by estimating the elastic properties of homogeneous and non-homogeneous solid materials. Further, several tests have shown that this measurement system works well even for low SNR levels.
机译：在本文中，我们提出了一种仅使用一个实验即可评估材料弹性常数的测量系统。该测量系统基于用于压缩波和切变波的无损测量的超声棱镜技术，并且基于匹配追踪与遗传算法（MP-GA）一起估算了这两个反向散射的回波。在此框架下，可以使用特殊的成型盒将样品制成棱柱形。然后，使用MP-GA方法通过反卷积过程得出测量数据的飞行时间。使用基于参数模型的矢量构造反向散射回波，其矢量与通过研究材料传播的超声信号的物理特性密切相关。通过估计均质和非均质固体材料的弹性，可以证明测量系统的有效性。此外，一些测试表明，即使在低SNR水平下，该测量系统也能很好地工作。

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