Wetness Measurement Theory Based on Microwave Differential Technique

摘要：

A wet steam humidity measurement method based on microwave differential technique is presented in this paper. The calculation model of equivalent dielectric constant of wet steam at different temperature and pressure is established. The measurement system is designed,which substitutes additional instrument for integrated module and uses two resonators to counteract system error. The principle of system is deduced,and the relationship of variation of steam humidity and output of system is given.System is simulated by use the S parameter of practical resonator.Data show that humidity and system output have high linear relationship. The consistency of theory and simulated data shown the validity of this theory and can be used for the online measurement of flowing wet steam. The accuracy of system in this paper can reach ±0.1% near the temperature 30 V.

关键词： microwave humidity measurement differential technique steam turbine resonator

作者: Shu-e Zhang Qiuyue Xia Hua Xiong Zhonghe Han

作者单位: Department of Electronic and Communication Engineering North China Electric Power UniversityBaoding,Hebei Province,China

会议类型: 国际会议

会议名称: 2009 9th International Conference on Electronic Measurement & Instruments(第九届电子测量与仪器国际会议 ICEMI2009)

会议地点: 北京

会议语种:英文

页码: 579-584

在线出版日期: 2009-08-16（万方平台首次上网日期，不代表论文的发表时间）