MULTI COIL EDDY CURRENT INSPECTION DEVICE

摘要

An eddy current inspection device which is able to control a sensitivity decrease, and is able to reliably detect a defect. An eddy current inspection device (1) is provided with an orthogonal detection mode which measures an electromotive force signal using a coil pair which is configured by two coils (112) within the first row coil group (R1), a first intersection detection mode which measures the electromotive force signal using the first coil pair which is configured by the two coils (112) within the first row and second row coil groups (R1) and (R2) that are lined up in a direction which intersects with the scanning direction, and a second intersection detection mode which measures the electromotive force signal using the second coil pair which is configured by the two coils (112) within the first row and second coil groups (R1) and (R2) that are lined up in a direction in which a direction which intersects with the scanning direction is on the same side as the direction through which the first coil pair intersects and has a larger coil pair intersection angle than the coil pair intersection angle of the first coil pair. By evaluating the signal strength and the phase angle, a defect can be detected.