Scheme of the system for detecting cracks.
Magnetic field distributions around a distribution line.
Definition of parameter .
Simple model for the distribution line that consists of seven conductive wires considering crack depth.
Parameter with and without a crack at sample number 100.
The distributions of parameter at location with and without crack.
The accuracy rate of judgment that the line has crack or none by using .
The highest accuracy rate using optimum with various combinations of sensors.
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