脉冲涡流阵列成像检测

基金项目:

国家自然科学基金资助项目(51067007)

航空科学基金资助项目(2008ZE56008)

详细信息

Study of Pulsed Eddy Current Array Imaging Detection

摘要: 飞机多层铆接结构中内层埋藏缺陷的检测是无损检测领域的一个难点。设计了一套脉冲涡流阵列检测系统，包括线性霍尔阵列探头和软件成像系统。应用该系统对铝合金深层裂缝及铆接结构内层裂纹腐蚀缺陷进行检测，通过时间切片分析法获取缺陷信号特征值，组成特征幅值的矩阵，实现成像扫描。试验结果表明，采用时间切片分析法能够有效地对试件近表面及内层的缺陷进行成像检测。
- 脉冲涡流 /
- 阵列 /
- 时间切片 /
- 成像
Abstract: It is difficult to detect flaw buried in the multi-layer riveted structure of aircraft. This paper designed a pulsed eddy current testing system, including the linear array probes and imaging system. The riveted aluminum alloy sample fabricated with both inner crack and corrosion was tested by the proposed system, and an imaging scan was achieved by the way of time slice applied in getting eigenvalue matrix from characteristic signal. The results of experimentation showed that the use of time slice analysis method can be efficiently used to detect subsurface and inner defects in multi-layer structure.
- Pulsed eddy current /
- Array /
- Time slice /
- Imaging

[1]	Moulder J C, Bieber J A, Ward III W W, et al. Scanned pulsed-eddy-current instrument for non-destructive inspection of aging aircraft［J］. Nondestructive Evaluation of Aging Aircraft, Airports and Aerospace Hardware, Proceedings of SPIE,1996,(2945):1-13.
[2]	Moulder J C, Bieber J A. Pulsed eddy-current measurements of corrosion and cracking in aging aircraft［C］. Materials Research Society Symposium Proceedings of Nondestructive Characterization of Materials in Aging Systems,1998:263-268.
[3]	Yuri Plotnikov,GE Global Research. Pulsed eddy current technology and aerospace applications［R］. GE Inspection Technologies,2005:1-23.
[4]	Tian G Y, Sophian A, Taylor D, et al. Multiple sensors on pulsed eddy current detection for 3-D subsurface crack assessment［J］. IEEE Sensors,2005,5(1):90-96.
[5]	Raimond Grimberg, Lalita Udpa, Adriana Savin, et al. 2D Eddy current sensor array［J］. NDT&E International,2006,39:264-271.
[6]	Smith R A, Hugo G R. Deep corrosion and crack detection in aging aircraft using transient eddy current NDE［J］. The Proceedings of the Fifth Joint NASA/FAA/DOD Conference on Aging Aircraft, Orlando: 2001.
[7]	杨宾峰，罗飞路，张玉华，等.脉冲涡流在飞机铆接结构无损检测中的应用研究［J］.计量技术,2005(12):15-17.
[8]	Giguère S, Lepine B A, Dubois J M S. Pulsed eddy-current(PEC) characterization of material loss in multi-layer structures［J］.Canadian Aeronautics and Space Journal,2000,46(4):204-208.