DEFECT MEASUREMENT METHOD, DEFECT MEASUREMENT DEVICE, AND TESTING PROBE

摘要

In order to quickly carry out quantitative evaluation of a defect in a magnetic material member, a testing probe (100) provided with a third magnet (4), which is polarized in a direction that intersects with a surface opposing the magnetic material member, and with a Hall element (11), which detects the density of the magnetic flux passing through the third magnet (4) and the magnetic material member, is used to apply, to the output signal of the Hall element (11), an evaluation algorithm that is selected in accordance with whether the defect surface is the front or rear surface.