摘要
系统地回顾了空气耦合超声检测技术的发展进程，阐述了空气耦合超声检测基本原理及其理论，分析归纳出影响检测性能的4大技术瓶颈及其相关解决手段，即：①气／固分界面强反射影响；②气／固分界面强折射影响；③超声传播中空气吸收影响；④弱信号处理。从理论研究和实际工程应用出发，以航天复合材料构件的非接触超声检测技术为背景，基于穿透式空气耦合超声检测模式，建立空气耦合超声检测实验系统，并与传统浸入式超声检测技术相比较，分析和评估了空气耦合超声在实际应用中的检测性能。开展空气耦合式超声检测技术研究对提高我国无损检测水平具有理论参考和工程应用价值。
The developments of air-coupled ultrasonic testing have been reviewed, and then the principles with its theories are presented generally, based on which four bottle-neck problems with its solutions are concluded, namely： （1） high reflection influence at air/solid interface;（2） strong refraction influence at air/solid interface; （3） high absorption of ultrasonic energy in air transportation;（4） low signal to noise ratio processing. Starting from the theory research and practical engineering application, meanwhile, the background of the non contacted ultrasonic testing for advanced aerospace composite materials, based on the through-transmissionces, the air-coupled experimental system has been set up. The performance of the testing system is evaluated comprehensively by compared with the conventional immersed ultrasonic testing. Making a study of the air-coupled ultrasonic testing is valued for the improving of non destructive testing in both the theory research and engineering application.
出处
《装备指挥技术学院学报》
2007年第2期79-84,共6页
Journal of the Academy of Equipment Command & Technology
基金
部委级资助项目
关键词
非接触
空气耦合
超声检测
穿透式
non-contact
air-coupled
ultrasonic testing
through-transmission
