Electromagnetic pulsed thermography for natural cracks inspection.
Electromagnetic pulsed thermography for natural cracks inspection.
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用于自然裂纹检测的电磁脉冲热成像
DOI：
10.1038/srep42073
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发表时间：
2017-02-07
影响因子：
4.6
通讯作者：
Li K
中科院分区：
文献类型：
--
作者：
Gao Y;Tian GY;Wang P;Wang H;Gao B;Woo WL;Li K
越来越需要新兴的材料退化和裂缝的集成传感和监测来表征基础设施的结构完整性和安全性。然而，大多数传统的无损评价（NDE）方法是基于单一的模态传感，这是不足以评估结构的完整性和自然裂缝。本文提出了电磁脉冲热成像快速和全面的缺陷表征。它将漏磁、感应涡流和感应加热等多种物理现象与物理学相结合，结合信号处理算法，提供丰富的材料性能和缺陷信息。提出了一种新的基于一阶导数的多物理场时空行为特征，以提高对不同方向裂纹的检测能力。实验结果表明，该方法对人工裂纹和自然裂纹的检测具有很好的鲁棒性，显著提高了缺陷检测能力。它开辟了多物理场传感和集成NDE，对自然理解和更好地定量评估自然裂纹（包括应力腐蚀裂纹（SCC）和滚动接触疲劳（RCF））具有潜在影响。
Emerging integrated sensing and monitoring of material degradation and cracks are increasingly required for characterizing the structural integrity and safety of infrastructure. However, most conventional nondestructive evaluation (NDE) methods are based on single modality sensing which is not adequate to evaluate structural integrity and natural cracks. This paper proposed electromagnetic pulsed thermography for fast and comprehensive defect characterization. It hybrids multiple physical phenomena i.e. magnetic flux leakage, induced eddy current and induction heating linking to physics as well as signal processing algorithms to provide abundant information of material properties and defects. New features are proposed using 1st derivation that reflects multiphysics spatial and temporal behaviors to enhance the detection of cracks with different orientations. Promising results that robust to lift-off changes and invariant features for artificial and natural cracks detection have been demonstrated that the proposed method significantly improves defect detectability. It opens up multiphysics sensing and integrated NDE with potential impact for natural understanding and better quantitative evaluation of natural cracks including stress corrosion crack (SCC) and rolling contact fatigue (RCF).