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- Title
Quantitative evaluation of eddy current distribution by relative entropy and cross entropy.
- Authors
Chen, Guolong; Cao, Zheng
- Abstract
Koch curve exciting coil of an eddy current probe can adjust the eddy current distributing in more directions at a small domain to enhance the sensitivity of eddy current probe for short defect detection. In this study, a relative entropy and a cross entropy of tangential intersection angle spectrum are proposed to evaluate the eddy current distributions in the different directions when the eddy current probe is positioned at different lift-off distances and excited by different exciting frequency alternative currents. The eddy current distributions induced by a circular and a fractal Koch curve exciting coils are analyzed by the two entropy indices. With the increasing of the lift-off distance or the decreasing of the exciting frequency, the eddy current distributions induced by the Koch curve exciting coil are close to those induced by the circular exciting coil.
- Subjects
EDDY currents (Electric); CURRENT distribution; EDDIES; EDDY current testing; FRACTAL analysis
- Publication
Measurement & Control (0020-2940), 2021, Vol 54, Issue 3/4, p164
- ISSN
0020-2940
- Publication type
Article
- DOI
10.1177/0020294020984201