| 脉冲涡流无损检测中腐蚀缺陷边缘的识别 |
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| 引用本文： | 杨宾峰,罗飞路,潘孟春. 脉冲涡流无损检测中腐蚀缺陷边缘的识别[J]. 机械工程学报, 2008, 44(12): 75-79. DOI: 10.3901/JME.2008.12.075 |
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| 作者姓名： | 杨宾峰 罗飞路 潘孟春 |
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| 作者单位： | 空军工程大学电讯工程学院,西安,710077;国防科技大学机电工程与自动化学院,长沙,410073 |
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| 基金项目： | 国家自然科学基金 ， 国家科技支撑计划 |
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| 摘 要： | 对腐蚀缺陷的边缘进行准确识别是无损检测领域的一个难点，直接影响着腐蚀成像的效果。采用阵列脉冲涡流对腐蚀缺陷进行检测，针对传统无损检测中只从时域提取特征造成识别正确率较低的问题，根据脉冲涡流具有丰富频率成分的特点，从时域和频域分别提取特征量，提出一种基于主成分分析的阵列脉冲涡流腐蚀缺陷边缘识别方法，提高缺陷边缘识别的正确率，理论分析与试验结果相一致，验证了所采用方法的正确性。
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| 关 键 词： | 阵列脉冲涡流 腐蚀 特征提取 主成分分析 边缘识别 |
Identification of Corrosion Fringe in Pulsed Eddy Current Nondestructive Testing |
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| YANG Binfeng,LUO Feilu,PAN Mengchun. Identification of Corrosion Fringe in Pulsed Eddy Current Nondestructive Testing[J]. Chinese Journal of Mechanical Engineering, 2008, 44(12): 75-79. DOI: 10.3901/JME.2008.12.075 |
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| Authors: | YANG Binfeng LUO Feilu PAN Mengchun |
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| Affiliation: | Institute of Telecommunication Engineering, Air Force Engineering University College of Mechatronic Engineering and Automation, National University of Defense Technology |
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| Abstract: | It is difficult to accurately identify corrosion fringe in nondestructive testing (NDT), which will directly in fluence the effect of corrosion imaging. Array pulsed eddy current (APEC) is used to detect corrosion. With the purpose of overcoming the problem of low identification accuracy in conventional NDT which only extracts features in the time domain, on the basis that PEC has a broadband frequency, features are extracted in both time and frequency domains. A method based on principal component analysis (PCA) is proposed to enhance the accuracy of identification of corrosion fringe, the agreement between theory and experiment shows that the present method is correct. |
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| Keywords: | Array pulsed eddy current Corrosion Feature extraction Fringe identification Principal component analysis |
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