准平衡态下的流量式泄漏检测容积补偿研究  

Research on Volume Compensation for Flow-measurement Leakage Detection in Quasi-balanced State

作　　者：纪春华[1] 葛楠[1] 朱煜[1] 

机构地区：[1]清华大学摩擦学国家重点实验室,北京100084

出　　处：《中国机械工程》2012年第5期515-517,524,共4页China Mechanical Engineering

基　　金：国家基础研究发展计划(973计划)资助项目(2009CB724205);中国博士后科学基金资助项目(20100470299)

摘　　要：为研究并联型流量式气体泄漏检测中容器容积与泄漏量之间的内在关系,解决检测中的多参数耦合问题,从泄漏检测机理出发,通过分析检测过程中的准平衡状态,把压力变化率作为搭建基准容器与被测容器间的桥梁,建立了适用于并联型流量式泄漏检测的容积补偿模型,并提取层流管流量与泄漏量关系中的容积影响因子作为容积补偿系数。实验结果验证了模型的正确性,即采用容积补偿的方法,能初步建立起泄漏量与差压信号间的线性关系。In order to study the volume effects on the leakage detection results in parallel flow-measurement leakage detection,a volume compensation model was proposed by analyzing the quasi-balanced state in detection phase under the assumption that the pressure difference ratio of the base container is equal to that of the test container.Considering the volume variation influence on the relationship between capillary flow and leakage,a volume compensation coefficient was derived,which can be used to decouple the volume parameter from others.Experimental results verify the proposed model to be of validity,and a primary linear relationship between leakage and differential pressure has been established with volume compensation method.

关 键 词：泄漏检测 流量 容积补偿 差压 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]