Comparison of results of measuring the magnetic field of a crack by flux-gate meters with calculated data obtained within a model of constant magnetic charge density

Detection of back-side pit on a ferrous plate by magnetic flux leakage method with analyzing magnetic field vector

“…As a result, measurement of the imaginary part as described by was effective, compared to the directly measured magnetic field or phase change independently. Many numerical and experimental estimations for defect characterization have been reported [2][3][4][5], and the detailed spatial distribution of the magnetic flux leakage using theoretical models such as the magnetic dipole has been discussed. In this paper, we evaluated the imaginary part of the y-component for estimating the cylindrical shape of the flaws using the low magnetization method.…”

“…To evaluate and inspect flaws in metallic materials using electromagnetic methods, various measurement methods, such as eddy current testing (ECT) [1], MFL [2][3][4][5][6][7][8], remote field testing (RFT) [9], magnetic particle inspection (MPI) and pulsed eddy current (PEC) [10], have been developed. These techniques are categorized into the two methods of eddy current and magnetic flux leakage measurements.…”