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首页> 外文会议>Vibration Measurements by Laser Techniques: Advances and Applications >Non-destructive testing technique combining ultrasonic Lamb waves and double-pulse TV holography
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Non-destructive testing technique combining ultrasonic Lamb waves and double-pulse TV holography

机译：超声波兰姆波与双脉冲电视全息相结合的无损检测技术

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The combination of ultrasonics with optics has led to the development of emergent technologies for nondestructive testing with outstanding capabilities. In this work we describe a combination that, in our knowledge, was up to now unexplored, directed to the detection of cracks and other types of flaws in metallic plates of medium thickness (several millimeters). We selected a special kind of surface acoustic waves, i.e. Lamb waves, to explore the volume of the plates in the search for flaws, while a whole field interferometric technique, namely double-pulse TV holography, is employed to generate a map of the surface displacements in which the signature of the defects can be seen as a perturbation of the initially smooth wavefronts. Several examples of detection of artificially generated flaws are presented.
机译：超声与光学技术的结合导致了无损检测技术的发展，并具有出众的性能。在这项工作中，我们描述了一种组合，据我们所知，该组合到目前为止尚未被开发出来，用于检测中等厚度（几毫米）的金属板中的裂纹和其他类型的缺陷。我们选择一种特殊的表面声波（即兰姆波）来探索板的体积以寻找缺陷，同时采用全场干涉技术（即双脉冲电视全息术）生成表面图。缺陷特征的位移可以看作是对初始光滑波前的扰动。提出了一些检测人工生成的缺陷的示例。

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