Patent ID: 8803516

Claim:
An eddy current testing method which involves for rotating an eddy current testing probe in which a detection coil is arranged within an exciting coil so that coil planes of the both coils are orthogonal to each other, and testing an object to be inspected in which a liftoff between an inspection surface of the object and the detection coil changes depending on a rotational position of the detection coil, comprising the steps of: setting a detection sensitivity to a flaw signal at a predetermined rotational position of the detection coil as a reference value of detection sensitivity; and adjusting a detection sensitivity to a flaw signal at a rotational position of the detection coil based on the reference value of detection sensitivity, wherein the inspection surface of the object has a predetermined curvature so that the liftoff oscillates between a maximum value and a minimum value in a continuous fashion depending on the rotational position of the detention coil.