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

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.