Improved impact damage characterisation in CFRP samples using the fusion of optical lock-in thermography and optical square-pulse shearography images
Improved impact damage characterisation in CFRP samples using the fusion of optical lock-in thermography and optical square-pulse shearography images
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DOI：
10.1016/j.ndteint.2020.102215
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发表时间：
2020-04-01
影响因子：
4.2
通讯作者：
Schmitt, Robert H.
中科院分区：
文献类型：
--
作者：
de Oliveira, Bernardo C. F.;Nienheysen, Philipp;Schmitt, Robert H.
提出了利用光学锁定热成像(OLT)和光学方形脉冲剪切成像(OSS)图像融合的方法来表征碳纤维增强塑料(CFRP)板的冲击损伤。样品被低能量撞击损坏，并使用OLT、OSS和参考超声(US)飞行时间C扫描进行检查。共提出了1113种分解、预处理、分割和融合工具的组合，并使用等效直径准则和马修斯相关系数与OLT、US和OSS的结果进行了比较。结果表明，融合后当量直径测量误差减小了72.21%，测量增强了8.05%，表明所提出的图像融合方法能够成功地进行冲击损伤检测。
Image fusion methods with optical lock-in thermography (OLT) and optical square-pulse shearography (OSS) images are proposed to characterise impact damages in carbon fibre reinforced plastic (CFRP) plates. The samples were damaged with low-energy impacts and inspected using OLT, OSS and the reference ultrasound (US) time-of-flight C-scans. A total of 1113 combinations of decomposition, preprocessing, segmentation and fusion tools were proposed and compared with OLT, US and OSS results using the equivalent diameter criterion and the Matthews' correlation coefficient. The results indicated a reduction of 72.21% in the equivalent diameter measurement error and a metric enhancement of 8.05% when using the fusion, showing that one of the developed image fusion methods can successfully perform improved impact damage inspections.