容器及泄漏点温度变化对红外气体泄漏检测的影响的研究  

Study of Influence to Leakage Detection of Infrared Gas Based on the Temperature Change of Containers and Leak Point

作　　者：金月丽[1] 王涛[1] 覃鹤宏[1] 张睿智[1] 范伟[1] 

机构地区：[1]北京理工大学自动化学院,北京100081

出　　处：《液压气动与密封》2012年第8期50-52,共3页Hydraulics Pneumatics & Seals

基　　金：国家自然科学基金项目资助(50975025)

摘　　要：红外气体泄漏点检测是利用气体泄漏时在泄漏点处的温度场特性以及热成像装置获取的红外辐射信号对泄漏点进行定位。取得最佳检测效果的关键之一在于尽量增大泄漏点与其周围温度场的温差。充气节流口的直径、充入被测容器的空气压力及温度会对上述温差造成影响。针对上述3个因素,通过理论分析、仿真和实验分析,得到在不同检测条件下充放气过程中容器及泄漏点处的温度变化,从而提出选择泄漏点与其周围容器壁的温度温差ΔT达到极值附近时的红外图像进行图像处理来诊断泄漏点的新策略,并通过实际图像处理算法验证了所提方法的有效性。The leakage detection is using temperature characteristics of the leak point and infrared radiation signals to locate the leak point.The key to achieve the best detection result is to increase the temperature difference between the leak point and around.Diameter of the inflatable orifice,pressure and temperature of the air will impact the temperature difference.Through theoretical analysis,s imulation and experimental analysis,to get the temperature change during charge and discharge process in different testing conditions,and given the new strategy using infrared images when temperature difference ΔT is near the extremum to diagnose the leakage.And the effectiveness is verified through the actual image processing algorithms.

关 键 词：气体泄漏 红外检测 温度变化 图像处理 

分 类 号：TH274.51[机械工程—机械制造及自动化]