联合时频分析在脉冲涡流信号识别中的应用
Analysis of Influence Factors on Pulsed Eddy Current NDT System
摘 要
脉冲涡流主要用于对飞机多层结构中出现的腐蚀缺陷进行定量检测。针对实际检测过程中由于探头提离变化和腐蚀缺陷同时存在时的信号难以识别的问题，应用时频分析的方法能同时得出信号随时间和频率变化的特性，为脉冲涡流检测信号提供了一种很好的可视化识别途径。
时频分析
平滑伪Wigner-Ville展开
Pulsed eddy current testing
Time-frequency analysis
Smoothed pseudo-Wigner-Ville distribution
Abstract
Pulsed eddy current (PEC) nondestructive testing is a new technology developed in recent years, mainly used to detect corrosion of aircraft fuselage lap splices quantificationally, aimed at the problems that variations in the probe lift-off makes signal change resemble as variations of corrosion, joint time-frequency analysis is used in this paper, the result of experimentation shows that time-frequency analysis can describe the characteristic of signal changing with time and frequency, which provide a intuitive approach for the PEC nondestructive testing.
中图分类号 TG115.28 TP391
所属栏目 科研成果与学术交流
基金项目
收稿日期 2005/10/12
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备注杨宾峰(1976-)，男，博士，研究电磁无损检测。
引用该论文: YANG Bin-feng,LUO Fei-lu,CAO Xiong-heng,XU Xiao-jie. Analysis of Influence Factors on Pulsed Eddy Current NDT System[J]. Nondestructive Testing, 2007, 29(12): 690～693
杨宾峰,罗飞路,曹雄恒,徐晓杰. 联合时频分析在脉冲涡流信号识别中的应用[J]. 无损检测, 2007, 29(12): 690～693
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参考文献
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【3】Smith R A, Hugo G R. Deep corrosion and crack detection in aging aircraft using transient eddy current NDE[J]. Review of Progress in Quantitative NDE,1999,43(1):1401-1408.
【4】Smith R A, Hugo G R. Transient eddy current NDE for ageing aircraft-capabilities and limitations[J]. Insight,2001,43(1):14-24.
【5】Sophian A, Tian G Y, Taylor D, et al. Design of a pulsed eddy current sensor for detection of defects in aircraft lap-joints[J]. Sensors and Actuators A,2002,101(1):92-98.
【6】向 阳,史习智.混凝土结构超声检测信号的时频分析研究[J].数据采集与处理,2001,16(2):150-154.
【7】沈国际,陶利民,温熙森,等.基于Wigner分布的齿轮箱振动信号相位估计[J].机械工程学报,2004,40(9):185-189.
【8】邹 剑,陈 进,董广明.基于Wigner-Wille转子分布裂纹识别的仿真[J].上海交通大学学报,2004,38(7):1201-1204.
【9】Dai X W, Ludwig R, Palanisamy R. Numerical simulation of pulsed eddy current nondestructive testing phenomena[J]. IEEE Transactions on Magnetics,1990,26(6):3089-3096.
【10】Qian S, Chen D. Joint Time-Frequency Analysis[M]. America, New Jersey: Prentice-Hall,1996.
【11】陈 君,闫 述,李正斌,等.联合时频分析在电磁测深问题中的应用[J].电波科学学报,2003,18(4):393.
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