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Defect characterisation using pulsed eddy current thermography under transmission mode and NDT applications

机译：在传输模式和无损检测应用中使用脉冲涡流热成像进行缺陷表征

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摘要

Pulsed eddy current (PEC) thermography has been successfully applied to detect cracks in metal alloy and carbon fibre reinforced plastic (CFRP) in previous works. In these applications, an inductor and infrared camera are on the same side of components, named reflection mode. In this work, the transmission mode, where the inductor and infrared camera are on opposite sides of component is investigated for defect characterisation through the analytical analysis and experimental studies. The studies show that the detection mechanisms for impact and delamination in CFRP are totally different. Carbon structure can be observed on the early stage of heating phase and impact leading to decreasing conductivity can be also detected in heating phase. However, delamination can be characterised using late stage of cooling phase. Combing the detection mechanisms, principal components analysis and independent components analysis, image reconstruction method is used to improve the sensitivity.
机译：在以前的工作中，脉冲涡流（PEC）热成像已成功应用于检测金属合金和碳纤维增强塑料（CFRP）中的裂纹。在这些应用中，电感器和红外热像仪位于组件的同一侧，称为反射模式。在这项工作中，通过分析分析和实验研究，研究了电感和红外摄像头位于组件相对侧的传输模式，以进行缺陷表征。研究表明，CFRP中撞击和分层的检测机制完全不同。可以在加热阶段的早期观察到碳结构，并且在加热阶段也可以检测到导致电导率降低的冲击。但是，可以使用冷却阶段的后期来表征分层。结合检测机制，主成分分析和独立成分分析，采用图像重建方法提高灵敏度。

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  • 来源
    《NDT & E international》 |2012年第2012期|p.28-36|共9页
  • 作者

    Mengchun Pan; Yunze He; Guiyun Tian; Dixiang Chen; Feilu Luo;

  • 作者单位

    College of Mechatronics and automation, National University of Defense Technology, Changsha 410073, PR China,School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom;

    College of Mechatronics and automation, National University of Defense Technology, Changsha 410073, PR China,School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom,National University of Defense Technology, College of Mechatronics and Automation, No 47, Yanwachi street, Changsha 410073,China;

    School of Electrical and Electronic Engineering, Newcastle University, Newcastle upon Tyne, NE1 7RU, United Kingdom;

    College of Mechatronics and automation, National University of Defense Technology, Changsha 410073, PR China;

    College of Mechatronics and automation, National University of Defense Technology, Changsha 410073, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    pulsed eddy current thermography; transmission mode; CFRP characterisation; delamination; impact; image reconstruction;

    机译：脉冲涡流热成像传输方式CFRP表征;分层影响;影像重建;

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