基于脉冲红外热成像技术的航空发动机封严涂层检测研究

航空发动机封严涂层质量检测仍然没有有效的无损检测手段，目前还是采用外观检查及破坏性检测方法完成。针对航空发动机封严涂层无损检测需求，开展脉冲红外热成像技术研究，采用闪光灯激励，实现对试件表面热激励，通过热像仪采集图像数据；为了提高图像的分辨率，采用1阶导(1-D)进行图像处理。在完成对人工制作厚度为1 mm的封严涂层试件实验检测后，发现该方法能够有效检测出试件中的2个缺陷，并可有效提取出缺陷大小信息，与实际缺陷大小基本一致，验证了脉冲红外热成像技术对封严涂层检测的有效性。

Aeroengine Sealing Coating Detection Based on Pulsed Infrared Thermography Technology

There is still no effective nondestructive testing method for the quality testing of the aeroengine sealing coating, and visual inspection and destructive methods are still used to test it now. In order to meet the requirements of nondestructive testing of the aeroengine sealing coating, the pulsed infrared thermography technology was studied. The flash excitation was used to excite the surface of the specimen, and the image data was collected by thermal imager. In order to improve the resolution of the image, the first-order derivative (1-D) was used for image processing. After the experimental detection of the sealing coating specimen with the thickness of 1 mm was completed, it was found that the method could effectively detect the two defects in the specimen and effectively extract the size information of defects, which was basically consistent with the size of practical defects and verified the effectiveness of pulsed infrared thermography technology for sealing coating.