Crack characterization method with invariance to noise features for eddy current inspection of fasterner sites

Journal of Nondestructive Evaluation

Volumn 25, Issue 4, 2006, Pages 165-181

  Aldrin, John C ^a,b   Knopp, Jeremy S ^b  

^a Computational Tools ^*  (United States)

^b AIR FORCE RESEARCH LABORATORY   (United States)

Author keywords

Cracks; Eddy current; Feature extraction; Modeling; Noise invariance

Indexed keywords

ACOUSTIC NOISE; ALGORITHMS; CRACKS; FASTENERS; FEATURE EXTRACTION; LEAST SQUARES APPROXIMATIONS; SIGNAL PROCESSING;

LOCALIZED CRACK FEATURE; MULTI-LAYER STRUCTURES; NOISE INVARIANCE;

EDDY CURRENT TESTING;

EID: 33751549453     PISSN: 01959298     EISSN: 15734862     Source Type: Journal    
DOI: 10.1007/s10921-006-0014-5     Document Type: Article

References (17)

1. N. Nakagawa, Theory of eddy current inspection of corner cracks, Rev. Prog. Quant. Nondestr. Eval. 10, pp. 249-254 (1991).
2. N. Nakagawa and J. C. Moulder, A model of bolt hole inspection via eddy currents, Rev. Prog. Quant. Nondestr. Eval. 12, pp. 259-263 (1993).
3. R. E. Beissner, G. L. Burkhardt, E. A. Creek, and J. L. Fisher, Eddy current probe design for second-layer cracks under installed fasteners, Rev. Prog. Quant. Nondestr. Eval. 12, pp. 1017-1023 (1993).
4. F. Thollon, B. Lebrun, N. Burais, and Y. Jayet, Numerical experimental study of eddy current probes in ndt of structures with deep flaws, NDT & E International 28(2), pp. 97-102 (1995).
5. J. L. Rasolonjanahary, F. Thollon, and N. Burais, Study of eddy current non destructive testing system in riveted assemblies, IEEE Transactions on Magnetics 32(3), pp. 1585-1588 (1996).
6. C. Chao, L. Xuan, L. Udpa, G. Fitzpatrick, D. Thome, and W. Shih, Parametric studies of magneto optic imaging using finite-element models, Rev. Prog. Quant. Nondestr. Eval. 19, pp. 1017-1023 (2000).
7. R. Murphy, H. Sabbagh, A. Chan, and E. Sabbagh, A volume-integral code for electromagnetic nondestructive evaluation, In Proceedings of the 13th Annual Review of Progress in Applied Computational Electromagnetics 1997 (Monterey, CA).
8. J. S. Knopp, J. C. Aldrin, R. Ko, and H. Sabbagh, Numerical and experimental study of eddy current crack detection around fasteners in multi-layer structures, Rev. Prog. Quant. Nondestr. Eval. 23, pp. 336-343 (2004).
9. J. S. Knopp and J. C. Aldrin, Numerical studies of eddy current nde for small crack detection around fastener holes in multi-layer structures, Rev. Prog. Quant. Nondestr. Eval. 24, pp. 417-424 (2005).
10. S. Mandayam, L. Udpa, S. S. Udpa, and W. Lord, Invariance transformation for magnetic flux leakage signals, IEEE Trans Magnetics 32(3), pp. 1577-1580 (1996).
11. M. S. Safizadeh, B. A. Lepine, D. S. Forsyth, and A, Fahr, Time-frequency analysis of pulsed eddy current signals, J. Nondestr. Eval. 20, pp. 73-86 (2001).
12. S. N. Rajesh, L. Udpa, and S. S. Udpa, Numerical model based approach for estimating probability of detection in nde applications, IEEE Trans Magnetics 29 (2), pp. 1857-1861 (1993).
13. R. B. Thompson, Using physical models of the testing process in the determination of probability of detection, Materials Evaluation, 59 (7), pp. 861-865 (2001).
14. T. Dogaru and S. T. Smith, Novel eddy current probes for detection of deep cracks around fastener holes, Fifth Joint NASA/FAA/DoD Conference on Aging Aircraft, 2001 (Orlando, FL, September 10-13).
15. T. Dogaru, C. H. Smith, R. W. Schneider, and S. T. Smith, Deep crack detection around fastener holes in airplane multi-layered structures using GMR-based eddy current probes, IEEE Transactions Magnetics 37 (5), pp. 3831-3838 (2001). Rev. Prog. Quant. Nondestr. Eval. 24, pp. 417-424 (2005).
16. K. Fukunaga, An Introduction into Statistical Pattern Recognition Academic Press, 1990.
17. C. M. Bishop, Neural Networks for Pattern Recognition 1995 (Clarendon Press, Oxford).