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首页> 外文期刊>Journal of Basic and Applied Physics >Estimation of a Drill Hole’s Center Location from the Wavefront in Scattering Waves Visualized by Pulsed Laser Scanning
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Estimation of a Drill Hole’s Center Location from the Wavefront in Scattering Waves Visualized by Pulsed Laser Scanning

机译：从散射波中的波前估计钻孔中心位置，通过脉冲激光扫描可视化

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摘要

The center location of a defect (a drill hole, DH) in a solid material was estimated using the circular-shaped wavefront of scattering waves. Measurement data recorded by a pulsed laser scanning system were used in the calculation. For data preprocessing, two techniques were applied: with the waveform peaks being extracted from the original measurement signals, and then a suitable threshold level being applied to the peak-extracted data. The center location of the hole was detected using the scattering wavefront of the snapshot images obtained immediately after reflection from the hole. Efficient calculation can be achieved as a result of decreasing a great number of pixel points in the snapshot images. This imaging technique is a promising candidate for use in an automatic defect inspection system that employs ultrasonic waves excited by pulsed laser scanning.
机译：使用散射波的圆形波阵面估计固体材料中缺陷（钻孔，DH）的中心位置。计算中使用了脉冲激光扫描系统记录的测量数据。对于数据预处理，应用了两种技术：从原始测量信号中提取波形峰值，然后将适当的阈值级别应用于提取的峰值数据。使用从孔反射后立即获得的快照图像的散射波阵面检测孔的中心位置。由于减少了快照图像中的大量像素点，因此可以实现高效的计算。该成像技术是用于自动缺陷检查系统中的有希望的候选者，该系统使用通过脉冲激光扫描激发的超声波。

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