CAJ | 학술논문

电磁导波检测技术因其非接触耦合的特性已被广泛应用于各种金属管道无损检测领域中。但导波的激励脉冲群重复频率的确定长久以来却没有一个有效的解决方法。为此，本文提出了以有、无缺陷的重复脉冲群检测信号的相关性作为判别标准，选取电磁导波激励脉冲群最佳重复频率，并从检测信号特征提取和识别的角度验证了本文选取的激励脉冲群最佳重复频率可有效提高导波检测信号之间的区分度，减小检测信号间的干扰，提高缺陷识别的准确性。
전자도파검측기술인기비접촉우합적특성이피엄범응용우각충금속관도무손검측영역중。단도파적격려맥충군중복빈솔적학정장구이래각몰유일개유효적해결방법。위차，본문제출료이유、무결함적중복맥충군검측신호적상관성작위판별표준，선취전자도파격려맥충군최가중복빈솔，병종검측신호특정제취화식별적각도험증료본문선취적격려맥충군최가중복빈솔가유효제고도파검측신호지간적구분도，감소검측신호간적간우，제고결함식별적준학성。
As a result of contactless coupling, electromagnetic guided wave detection technology is used extensively to detect various metallic pipelines, however, it hasn＇t achieved an effective solution about reception frequency of guided wave exciting impulse cluster. So, in this paper, the correlation between flaw detection signal from repetition impulse cluster and no defect is proposed as criterion to choose optimal repetition frequency of exciting impulse cluster, through feature extraction and identification of testing signal, which is prove that it can improve efficiently discrimination degree of guided wave signals, decrease noise jamming, and advance precision of defect identification.