DETERMINATION OF THE REFLECTOR TYPE FROM THE AMPLITUDES OF THE GLARE OF IMAGES RECONSTRUCTED ACCORDING TO DIFFERENT ACOUSTIC SCHEMES
In ultrasonic flaw detection, methods for recording and analyzing echo signals have been developed to determine the type of reflector and its size. The method of digital antenna focusing (DFA) allows you to restore the image of the entire boundary of the discontinuity, using echo signals reflected from the bottom of the control object, taking into account the transformation of the wave type. However, this approach is not always applicable in practice, since the shape of the bottom of the object of control may be unknown. Using the features of the behavior of the reflection coefficient for different types of waves, it is possible to make a conclusion about the type of reflector from the images only on the direct beam. Numerical and model experiments confirmed the efficiency of the proposed approach.