A universal attachment for standard ultrasonic flaw detectors and thickness gages

A brief analysis of facilities for nondestructive testing with the use of a contactless EMA method of exciting and detecting ultrasonic vibrations has been performed. A universal electromagnetic-acoustic (EMA) attachment for standard ultrasonic flaw detectors and thickness gages is described. The characteristics of the attachment and its main components—devices for generating radio signals, a generator of probe pulses, a preamplifier, a generator of biasing pulses, and EMA transducers—are presented. Examples of the use of this attachment are given.