科氏质量流量计相位差检测新方法  

The Novel Method of Phase Difference Detection in Coriolis Mass Flowmeter

作　　者：郑德智[1] 樊尚春[1] 邢维巍[1] 

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100083

出　　处：《仪器仪表学报》2005年第5期441-443,477,共4页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(60274039)资助项目。

摘　　要：基于科氏质量流量计的工作机理和实际工作情况下的信号频谱分析,提出了切实可行的相位差检测新方法。设计了改进的FIR数字滤波器,实现了对原始输出信号的实时滤波处理,有效地抑制了噪声的干扰,为科氏质量流量计的高精度测量提供了保证。同时该新方法提高了系统的动态品质。实验结果表明,所提出的方法和设计的信号处理系统具有实用价值。Based on the sensing mechanism of Coriolis mass flowmeter and analyzing signal spectrum in actual working, the novel applied method is devised for phase difference detection. The improved FIR filter is designed and used for filtering original signals, so the noise is restrained effectively and the measurement precision of the mass flowmeter is guaranteed. Meanwhile, the dynamic response performance of the system is improved by this novel method. The experimental results showed that the method is well worthy applying.

关 键 词：科氏质量流量计 相位差检测 FIR数字滤波器 信号频谱分析 信号处理系统 高精度测量 工作情况 工作机理 滤波处理 输出信号 动态品质 实用价值 设计 

分 类 号：TH814.6[机械工程—仪器科学与技术] TN713.7[机械工程—精密仪器及机械]