Crack imaging by scanning pulsed laser spot thermography
Crack imaging by scanning pulsed laser spot thermography
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DOI：
10.1016/j.ndteint.2010.08.006
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发表时间：
2011-03-01
影响因子：
4.2
通讯作者：
Rees, D. Andrew S.
中科院分区：
文献类型：
--
作者：
Li, Teng;Almond, Darryl P.;Rees, D. Andrew S.
提出了一种基于激光热斑热像二阶导数图像处理的裂纹成像新技术。实验结果表明，该方法与染料渗透检测方法的结果相吻合。一个三维模拟已经开发，以模拟热流从激光加热点在裂纹附近。一种“鬼点”方法被用来有效地处理在微米范围内具有开口的裂缝。研究了裂纹几何形状和系统参数对激光热斑热像的影响。(C) 2010 Elsevier Ltd.版权所有。
A new crack imaging technique is presented that is based on second derivative image processing of thermal images of laser heated spots. Experimental results are shown that compare well with those obtained by the dye penetrant inspection method. A 3D simulation has been developed to simulate heat flow from a laser heated spot in the proximity of a crack. A 'ghost point' method has been used to deal efficiently with cracks having openings in the micometre range. Results are presented showing the effects of crack geometry and system parameters on thermal images of laser heated spots. (C) 2010 Elsevier Ltd. All rights reserved.