大型金属蜂窝构件的现场激光错位散斑检测

In-Situ Inspection of Large Metal Honeycomb Structure by Shearography

对航空航天大型金属蜂窝制件运用激光错位散斑技术在大厂房进行现场检测时,发现当测试对象由人工缺陷试样换成大型的飞行器部件,原本一流的检测设备可能不再灵敏、好用,甚至难以调节到实验室中平常检测所呈现的正常状态。描述了在现场检测中针对干扰因素所采取的解决措施:尽量夜间检测并用帆布在检测场地搭建遮蔽棚。检测结果表明这些措施是有效的,此类现场检测是成功的。

Some in-situ non-destructive tests for large honeycomb components were undertaken and described in this paper. When environmental condition changed, our first class equipment could no longer be sensitive, it was even difficult to make them work as normal as usual. The effects of surroundings disturbances were presented and the concerned solutions were found. The key point is to carry out testing always in the evening, and if in the case that working in day time is absolutely needed, then making a shade environment for the instruments and using canvas shield for the object to be detected is recommended. The measuring results show that the nondestructive testing on site for these assembly parts is successful.