METHOD FOR NON-DESTRUCTIVE ULTRASONIC TESTING AS WELL AS DEVICE FOR THE IMPLEMENTATION OF THE METHOD

摘要

The invention relates to a method for non-destructive ultrasonic testing, in which ultrasonic pulses with a pulse repetition frequency are radiated by means of an ultrasonic transmitter into a workpiece to be tested and the ultrasonic pulses are reflected to bounding surfaces in the workpiece and the reflected ultra sound is recorded by means of an ultrasonic receiver and the signals are displayed in time- or position-dependent resolution. The method is characterized in that the pulse repetition frequency is changed at least once during the method.