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首页> 外文期刊>Measurement and Control: Journal of the Institute of Measurement and Control >Quantitative evaluation of eddy current distribution by relative entropy and cross entropy
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Quantitative evaluation of eddy current distribution by relative entropy and cross entropy

机译：相对熵和交叉熵的涡流分布的定量评估

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摘要

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.
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