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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 application of coatings on carbon fiber materials makes it difficult for conventional non-destructive testing techniques to measure coating thickness and to detect defects. Proposed infrared thermal wave non-destructive testing of the coating thickness and internal defects for testing. Infrared thermal wave non-destructive testing technology initiative to be tested sample thermal excitation, thermal wave propagation in a uniform sample, encountered thermal interface after the interface changes, through the continuous monitoring of the thermal imaging camera changes in the cooling curve to find the heat transfer time to measure Coating thickness. The difference of thermal properties under the coating layer produces anomalous heat map on the surface temperature field to detect the internal defects. The experimental results show that the coating thickness and defect detection can be performed by infrared thermal wave non-destructive technology on the carbon fiber base coating sample with coating thickness of 0.35 ~ 2 mm, the coating thickness detection accuracy is 0.1 mm. Infrared heat wave detection technology can achieve coating thickness measurement and coating defects detection.