金属无损检验已越来越引起国内外重视,并相应研制了不少无损检验方法及其设备,较广泛地应用于生产实践,从而对产品安全使用起到了积极作用。但至今无论是超声波或涡流探伤法,被检测管材必须要受一定压力而作转动或前进运动,这样管材运动方式有其一定局 Metal non-destructive testing has attracted more and more attention at home and abroad, and the corresponding development of a number of non-destructive testing methods and equipment, more widely used in production practices, thus the safe use of products has played a positive role. But so far, whether ultrasonic or eddy current testing method, the pipe must be tested under certain pressure for rotation or forward movement, so the pipe movement has its certain