DEVICE AND PROCESS FOR NONDESTRUCTIVE AND NONCONTACT DETECTION OF FAULTS IN A TEST PIECE

摘要

A device for nondestructive and noncontact detection of faults in a test piece, with a stationary measurement device (16) for taking an eddy current or a magnetic stray flux measurements on a test piece (10) continuously advanced relative to the measurement device; and a device (12) for positioning the test piece with respect to the measurement device in a plane perpendicular to the direction of movement of the test piece. The device also has a monitoring unit (20) with at least three distance sensors (22) arranged distributed around the test piece in the peripheral direction for contactless detection of the distance between the surface of the test piece facing the respective sensor and the respective sensor, as well as a unit for evaluating the signals from the sensors.