Transient Thermal Behavior of Eddy-Current Pulsed Thermography for Nondestructive Evaluation of Composites
Transient Thermal Behavior of Eddy-Current Pulsed Thermography for Nondestructive Evaluation of Composites
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DOI：
10.1109/tim.2013.2243505
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发表时间：
2013-05-01
影响因子：
5.6
通讯作者：
Tian, Gui Yan
中科院分区：
文献类型：
--
作者：
Cheng, Liang;Tian, Gui Yan
碳纤维增强塑料（CFRP）材料因其重量轻、强度高而广泛应用于飞机和风力涡轮机叶片。表面裂纹、冲击损伤和分层是CFRP复合材料最常见的缺陷。本文提出了一种基于主成分分析（PCA）的涡流脉冲热成像方法，用于从瞬态热图像或视频中检测和可视化缺陷。更具体地说，三种类型的缺陷进行分类的基础上，他们的瞬态温度行为使用PCA在像素级和光流图案在图像级。此外，通过光流法的特征提取，在图像级检索关于缺陷的定量信息，例如缺陷区域。
Carbon fiber reinforced plastic (CFRP) materials are widely used in aircraft and wind turbine blades due to their low weight and high strength. Surface cracks, impact damages, and delaminations are the most common defects for CFRP composites. In this paper, the principal component analysis (PCA)-based eddy-current pulsed thermography method is proposed to detect and visualize defects from transient thermal images or videos. More specifically, three types of defects are classified based on their transient temperature behaviors using PCA at the pixel levels and optical flow patterns at the image levels. In addition, through feature extraction from optical flow method, the quantitative information about the defects, such as a defective area, is retrieved at the image levels.