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1. 发明授权

US07505853B2 Inspection of composite materials 失效
标题翻译：复合材料检验
公开(公告)号：US07505853B2
公开(公告)日：2009-03-17
申请号：US11495902
申请日：2006-07-27
申请人： Cody Royce Engstrand , Ronald Alan Kline
发明人： Cody Royce Engstrand , Ronald Alan Kline
IPC分类号： G01B5/30
CPC分类号： G01N29/069 , G01N29/262 , G01N29/44 , G01N2291/106 , G01N2291/263
摘要： Since ultrasonic velocities in anisotropic media can change by a factor of 3 or more depending on the direction of propagation, accounting for these changes is extremely important. Also many anisotropic materials are made up of multiple layers of varying orientation, hence the need to account for refraction at ply boundaries. In the present invention, an algorithm is used to calculate these velocities and travel times and properly account for refraction phenomena. Specifically a multilayer SAFT algorithm has been developed that will calculate the time shift, shift and sum A-scan waveforms in layered anisotropic media at any given depth, ply orientation, and number of plies. The algorithm showed an improvement in signal to noise ratio with synthetic data as was expected. This algorithm can be used as a replacement for homogenizing material properties in layered media and will calculate time shifts with increased accuracy since exact material properties are used.
摘要翻译：由于各向异性介质中的超声速度可以根据传播方向改变3倍以上，因此考虑到这些变化是非常重要的。还有许多各向异性材料由多个不同取向的层组成，因此需要考虑层间边界处的折射。在本发明中，使用算法来计算这些速度和行进时间并适当地考虑折射现象。具体来说，已经开发了一种多层SAFT算法，它可以计算任何给定深度，层取向和层数的层状各向异性介质中的时移，移位和和A扫描波形。该算法显示出合成数据的信噪比有所改善。该算法可以用作层状介质中均质材料性质的替代物，并且将使用精确的材料性质，以更高的精度计算时间偏移。

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