METHOD AND DEVICE FOR THE NEAR-SURFACE, NON-DESTRUCTIVE INSPECTION BY MEANS OF ULTRASOUND OF A ROTATIONALLY SYMMETRIC WORKPIECE HAVING A DIAMETER THAT CHANGES FROM SECTION TO SECTION

摘要

The invention relates to a method and device for the near-surface, non-destructive inspection by means of ultrasound of a rotationally symmetric workpiece (1) having a diameter that changes from section to section. The method and device are based on the insonification of an ultrasonic test pulse into the workpiece (1) at a defined insonification angle Theta and the subsequent recording of an ultrasonic echo signal from the workpiece (1). Echo signals that trace back to a near-surface region ROI of the workpiece are identified and evaluated. Then, a graphic representation of the surface of the workpiece is generated.