The popular non destructive test methods for the foam-cored sandwich structure are reviewed; including air coupled ultrasonicmethod, pulse-echoultrasonicmethod 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。
2
The used ultrasonic testing method is only limited to A-scope pulse-echo method.
所用的超声探伤方法仅限于八型显示脉冲反射法。
3
A new method for ultrasonic distance measurement based on ultrasonic circulation and multi pulseecho principle is presented in the paper.