| 摘要 |
PURPOSE:To discriminate various factors concerning defects and surface conditions by obtaining an amplitude and a phase from a phase detection output and obtaining a defect depth, an aperture angle, and a depth direction on a basis of a defect distribution on a preliminarily set amplitude-phase plane with respect to a maximum amplitude point in a series of sections which exceed a specific threshold. CONSTITUTION:An amplitude A and a phase theta are obtained from phase detection outputs QX and QY of a flaw detector in accordance with formulas I and II, and a point Pmax where the amplitude A is maximum is detected from a series of points exceeding the preliminarily set threshold, and an indication 2 which does not exceed the threshold is removed from discrimination object. Values Amax and thetamax of the amplitude A and the phase theta at the point Pmax are obtained in accordance with formulas I and II. These values Amax and thetamax are applied to a factor-classified distribution chart C on the preliminarily set amplitude-phase plane to discriminate factors of the indication on a basis of the position. |
