微量气体体积分数测试方法的研究与实现  

Development and implementation of trace gas volume fraction testing method

作　　者：魏金成[1] 杜焕勇[1] 徐莎莎[1] 韩金霞[1] 

机构地区：[1]西华大学电气信息学院,四川成都610039

出　　处：《传感器与微系统》2011年第4期28-30,共3页Transducer and Microsystem Technologies

基　　金：四川省重点学科基金资助项目(SZD0503-09-0)

摘　　要：基于超声理论与复杂可编程逻辑器件(CPLD)技术的先进测试方法,用于空气绝缘开关(GIS)现场的六氟化硫气体体积分数检测。在分析二元气体体积分数计算公式的基础上,设计完成基本测试方法,进而又提出改进的相对相位时间差测试方法。实验证明:该方法较传统方法有着成本低、精度高及实现方便等优点,并克服了一般的测试方法中电路设计复杂、受环境影响大和不便于体积分数补偿等问题,在高压工控现场有着广泛的适用性和较高的应用价值。An advanced testing method for trace gas volume fraction,based on the ultrasonic theory and CPLD technology is described.It is used in gas insulated switch（GIS）-site.It can help to design and accomplish a primary test method.To take a further step,an advice is given on improved method of relative phase lag method,on the basic of analyzing the calculation formula for volume fraction of binary gas.Experimental results show that the method has the advantage of low cost,high precision and easy to operate than traditional way,and overcomes some troubles in normal test such as complex circuit design,environmental influences,awkward compensation density.Due to these advantages,this method has high value and wide application in industrial control fields.

关 键 词：气体体积分数 超声波 复杂可编程逻辑器件 测试方法 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]