METHOD FOR THE ULTRASONIC DETECTION OF A FLAW IN A REGION OF INTEREST IN A TRAIN WHEEL ROTATABLE ABOUT AN AXIS AND A DEVICE THEREFOR

摘要

The invention relates to a method for the non-destructive testing of a train wheel (101) by means of ultrasound. The method is based on the generation of a pulsed ultrasonic field in the train wheel (101) to be tested by means of an array (102) of individually controllable ultrasonic transmitting transducers (110) acoustically coupled to the train wheel (101). For this purpose, the ultrasonic transmitting transducers (110) are each controlled with a specific analog transient excitation signal, each analog transient excitation signal being generated based on an ultrasonic transmitting transducer- specific stored digital transient excitation function. Preferably, the resulting echo signals from the train wheel (101) to be tested are recorded by means of an array (102) of individually controllable ultrasonic receiving transducers (110). Each ultrasonic receiving transducer (110) is capable of providing an analog, time-resolved echo signal. The received analog time-resolved echo signals can be digitized in a transducer-specific way and temporarily stored in the form of an echo signal set. A plurality of different reception processing rules can then be applied to the latter. Furthermore, the invention relates to a device for carrying out the method.