For arc ultrasonic excitation, both the continuous and the pulse signal was separately applied to the test system including a conventional arc welding circuit.
在常规弧焊回路中采用了连续波和脉冲敲击式等不同的激励方式获得电弧超声信号。
The acoustic source of plane circular pistons with the radiating transient pulse wave finds wide application in the ultrasonic inspection and test.
幅射瞬态脉冲波的圆形活塞声源在超声检测中得到广泛应用。
The popular non destructive test methods for the foam-cored sandwich structure are reviewed; including air coupled ultrasonic method, pulse-echo ultrasonic method and shearogragh method.
回顾了泡沫夹层结构常用的无损检测方法：空气耦合超声方法、脉冲回波超声方法以及激光错位散斑干涉方法。
The popular non destructive test methods for the foam-cored sandwich structure are reviewed; including air coupled ultrasonic method, pulse-echo ultrasonic method and shearogragh method.
回顾了泡沫夹层结构常用的无损检测方法：空气耦合超声方法、脉冲回波超声方法以及激光错位散斑干涉方法。
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