AVGUR 3.1 COMPUTERIZED ULTRASONIC FLAW DETECTOR

The hardware of the computerized flaw detector described in the articl e comprises two modules in the form of printed circuit boards installe d in an IBM PC/AT personal computer. The flaw detector is furnished wi th advanced software, which is capable of forming A displays of echo s ignals in real time, averaging signals over time, processing input dat a by matched and Wiener filtering, and working with complex signals (B arker code and M sequences). It can be used to perform spectral analys is of echo signals, to measure their parameters, and to determine the sound velocity and attenuation in the testpiece material. Examples are given, illustrating the use of complex signals and various techniques for processing A displays to increase the reception sensitivity and e nhance beam resolution. The flaw detector has broad capabilities for r esearch, the development of new testing procedures, and the training o f specialists in ultrasonic flaw detection.