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浙江大学学报(工学版)
浙江大学学报(工学版)
机械与电气工程     
多层导电结构内部状态脉冲涡流检测分析方法
赵凌1, 黄平捷1, 刘宝玲1,2, 赵树浩1, 侯迪波1, 张光新1
1.浙江大学 控制科学与工程学院,浙江 杭州 310027； 2.南昌工程学院 机械与电气工程系,江西 南昌 330000
Pulsed eddy current detection and analysis method for internal state of multi layer conductive structure
ZHAO Ling1, HUANG Ping jie1, LIU Bao ling1,2, ZHAO Shu hao1,HOU Di bo1, ZHANG Guang xin1
1. College of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China;2. Department of Mechanical and Electrical Engineering, Nanchang Institute of Technology, Nanchang 330000, China
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摘要：
针对脉冲涡流多层导电结构内部状态检测问题及检测中提离抖动的干扰,采用Fisher线性判别分析(FLDA)进行脉冲涡流检测信号特征提取,抑制提离抖动的影响；应用支持向量机(SVM)进行多层导电结构内部状态的检测与分类；以双金属片温控器内部状态检测为实例进行实验验证.理论和实验分析表明,在多层导电结构内部状态检测时,FLDA可以通过选取最佳的投影方向,最大程度地分离有用特征信息和干扰信息,相较于基于峰值、峰值时间的时域特征法,能够有效地减小提离抖动的干扰,提高内部状态的检测准确度；在减小训练集样本的情况下,FLDA检测方法具有较高的检测准确率
Abstract:
Fisher linear discrimination analysis (FLDA) was used to extract signal features and restrain lift off fluctuation in order to solve the problem of pulsed eddy current detection for internal state of multi layer conductive structure and the interference of probe lift off. Then the support vector machine (SVM) method was investigated for multi layer structure internal states automated classification. Detection for internal state of bimetallic temperature controller structure was taken as an example to validate the method by experiment. The theoretical and experimental results show that the proposed method FLDA can realize the maximum separation of the useful information and disturbance information by choosing the best projection direction. FLDA helps to restrain lift off effect and obtain higher recognition accuracy compared with time domain feature extract method based on peak value and peak time. In the case of smaller sample size, the proposed method has a high detection rate
出版日期: 2016-04-01
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基金资助:

国家自然科学基金资助项目(50505045, 61174005)；浙江省教育厅资助项目(Y201432539).
通讯作者: 黄平捷，男，副教授.ORCID: 0000 0002 5487 6097.     E-mail: huangpingjie@zju.edu.cn
作者简介: 赵凌(1990—)，女，硕士生，从事涡流无损检测的研究.ORCID: 0000 0002 3219 7739. E-mail：zhaoling_zju@zju.edu.cn
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引用本文:

赵凌, 黄平捷, 刘宝玲, 赵树浩, 侯迪波, 张光新. 多层导电结构内部状态脉冲涡流检测分析方法[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2016.04.002.

ZHAO Ling, HUANG Ping jie, LIU Bao ling, ZHAO Shu hao,HOU Di bo, ZHANG Guang xin. Pulsed eddy current detection and analysis method for internal state of multi layer conductive structure. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2016.04.002.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2016.04.002    或    http://www.zjujournals.com/eng/CN/Y2016/V50/I4/603

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