中文摘要：

基于锁相红外热成像理论,对复合材料网格加筋结构的几类典型缺陷进行无损检测,采用法国Cedip公司开发的锁相红外热成像系统对检测结果进行分析。讨论了加载频率、输出电压偏移量对检测的影响。结果表明,相位图比幅值图含有更多的缺陷信息。不同的加载频率会产生不同的检测结果,选择恰当的加载频率是检测的关键;增加输出电压偏移量有利于检测。该方法可用于对复合材料未知缺陷的检测。

英文摘要：

Based on infrared lock-in thermography technology,the nondestructive testing of composite grid stiffened structures with typical defects was carried out.The result was also analyzed using infrared lock-in thermography system developed by Cedip in France.The effects of loading frequency and output voltage offset to the testing result were discussed.The result shows that there are more information of phase figures than that of amplitude figures.Different frequencies will lead to different results and the loading frequency is the key to the success.Increasing the output voltage offset will make a useful contribution for better testing.This method is feasible to inspect the unknown defect of composite materials.