低导热系数物质在红外成像检测中的影响及其处理

INFLUENCE AND TREATMENT OF LOW THERMAL CONDUCTIVITY SUBSTANCE IN INFRARED IMAGING TESTING

讨论了红外成像技术检测金属管内壁腐蚀时管壁外表面所覆盖的低导热系数（ＬＴＣ）层所产生的噪声．从理论和实验上研究了ＬＴＣ层对不同加载方式所产生的不同影响，还从理论上提出了一种处理严重ＬＴＣ层影响的新方法．

The noise produced by a randomly distributed low thermal conductivity (LTC) layer on the outer surface of a metal tube when using infrared imaging technique to detect the corrosion defects on the inner surface of the tube was studied. The different influences of LTC layer on different heat loading methods were also studied both theoretically and experimentally. A new approach to diminish the high power noise produced by LTC layer was proposed in the end.