Experimental Verification of Eddy-Current Flaw Theory
Chapter
Abstract
Carefully machined flaw samples in plates and tubes were examined with eddy-current coils of accurately known dimensions. Both near- and far-side flaws were measured using absolute and differential coil modes. The experimental data were compared with computer calculations based on the flaw theory of Burrows and the analytical solutions of Dodd and Deeds. The experimental and theoretical data are in good agreement whenever the flaw size is small compared to the other significant dimensions, but large enough to give a reasonable signal-to-noise ratio for the measuring instrument. The experimental and analytical readings are also used to check our flaw inversion theory.
Keywords
Impedance Change Flaw Theory Cylindrical Conductor Pancake Coil Pulse Eddy Current
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References
- 1.C. V. Dodd, W. E. Deeds, and J. W. Luquire, Integral Solutions to Some Eddy-Current Problems, Int. J. Nondestr. Test. 1:29–90 (1969).Google Scholar
- 2.C. C. Cheng, C. V. Dodd, and W. E. Deeds, General Analysis of Probe Coils Near Stratified Conductors, Int. J. Nondestr. Test. 3(2):109–30 (1971).Google Scholar
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- 4.M. L. Burrows, “A Theory of Eddy-Current Flaw Detection” (Ph.D. Dissertation), University Microfilms, Inc., Ann Arbor, Michigan (1964).Google Scholar
- 5.W. E. Deeds and C. V. Dodd, Determination of Multiple Properties with Multiple Eddy-Current Measurements, Int. Advances Nondestr. Test. 8:317–33 (1981).Google Scholar
Copyright information
© Plenum Press, New York 1985