FIELD: nondestructive flaw detection. SUBSTANCE: ultrasonic vibrations are excited in part under inspection and, while part is rotating, signal excited by contactless method is measured at chosen point of part surface by means of off-line ultrasonic vibration transducer mounted on inspected part and passed remotely to computer storage, compared with similar signal excited under static conditions at same point of part surface and entered in computer storage; difference in signals indicates condition of part. EFFECT: improved reliability of ultrasonic inspection. 1 dwg
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