基于红外热成像的气密性检测技术探讨  

Research on air tightness detection based on infrared thermal imaging

作　　者：田鹏飞[1] 周骥平[1] 朱兴龙[1] 徐留富[1] 

机构地区：[1]扬州大学机械工程学院,江苏扬州225127

出　　处：《扬州大学学报（自然科学版）》2013年第2期45-48,共4页Journal of Yangzhou University：Natural Science Edition

基　　金：江苏省科技支撑计划(工业)项目资助(BE2010147)

摘　　要：在对现有气密性检测方法和应用分析的基础上,通过理论分析和试验探索,提出一种基于红外热成像的气密性检测方法.分析了基于红外热成像的气密性检测原理,从检测形成条件、热成像图分析技术等方面进行了初步的技术分析.试验结果表明:当容器中有泄漏点时,由于其中充有比环境温度高的气体,故基于焦耳-汤姆逊效应理论,泄漏点气体温度降低,从所得的热成像图中能明显地看出奇异点的存在,从而确定泄漏点;由于热成像仪只能反映表面温度的变化,对于复杂形体的容器,其重叠在容器表面以下的部分难以获得有效的热成像图,因此红外热成像的气密性检测只适用于单一规则容器的气密性测量.On the basis of the analysis of the method and application about the existing air tightness detection,through the theoretical analysis and experimental research, one method of air tightness detection based on infrared thermal imaging is proposed. The experimental results show that if there is a leak in the container filled with high temperature gas, based on the theory of the Joule- Thomson effect, the temperature of leak gas is reduced and the singular point can be seen from the heat map, the leakage point is therefore detected. Because thermal imager can only reflect the change of surface temperature, for complex form of container, the effective thermal imaging figure behind the back of the container surface is difficult to be obtained, so the air tightness of infrared imaging detection rules can only be applied to a single container.

关 键 词：气密性检测 红外热成像 技术分析 

分 类 号：TN219[电子电信—物理电子学] TP391.41[自动化与计算机技术—计算机应用技术]