碳纤维材料上涂层的应用使得常规无损检测技术难以实现涂层的厚度测量和缺陷检测。提出红外热波无损检测技术对涂层厚度及内部缺陷进行检测。红外热波无损检测技术主动对被检测样件进行热激励, 热波在均匀试样中传播, 遇到界面后热传导发生变化, 通过红外热像仪连续监测的降温曲线的变化找到热传导时间来测量涂层厚度。涂层下的缺陷热属性差异对表面温场产生热图异常, 从而进行内部缺陷检测。实验结果表明, 对涂层厚度在0.35～2 mm的碳纤维基底涂层样件可用红外热波无损技术进行涂层厚度和缺陷检测, 涂层厚度检测精度为0.1 mm。红外热波检测技术可以实现涂层厚度测量和涂层下缺陷的检测。

The traditional nondestructive technique can not realize the coatings quality evaluation on carbon fiber floors. Infrared thermal wave nondestructive technique was proposed to fulfill the coating thickness measurement and defects detection. The Infrared thermal wave nondestructive technique heats the sample actively, and uses an infrared camera to sequentially detect the surface temperature change. The thermal wave in the sample will change the conduction process once meeting the interface. Then the thickness can be measured based on the temperature break time. On the other hand, the thermal images captured by the focal plane infrared camera will display different depth information with interior defects. Coating thickness measurement samples were designed for each has three different thickness steps. The results show that in the range of 0.35～2 mm, the infrared thermal wave nondestructive measurement can realize the thickness measurement with error less then 0.1 mm and defects detection.