A Phase Difference Measurement Method Based on the Extended Kalman Filter for Coriolis Mass Flowmeters

作     者：Chen, Nan Fan, Shangchun Zheng, Dezhi 

作者机构：Beihang Univ Sch Instrumentat & Optoelect Engn Beijing 100191 Peoples R China Beijing Polytech Sch Mech & Elect Engn Beijing 100176 Peoples R China 

出 版 物：《MEASUREMENT SCIENCE REVIEW》 (Meas. Sci. Rev.)

年 卷 期：2019年第19卷第2期

页      面：48-52页

核心收录：

学科分类：07[理学] 0804[工学-仪器科学与技术] 0701[理学-数学] 070101[理学-基础数学] 

基　　金：Innovative Research Team in Beihang University, National Natural Science Foundation of China National Natural Science Foundation of China 

主　　题：Coriolis mass flowmeter phase difference extended Kalman filter Mallat algorithm 

摘      要：According to the characteristics of stable single-phase flow, a phase difference measurement method based on the extended Kalman filter is proposed in this paper for use with Coriolis mass flowmeters. Firstly, the Mallat algorithm is applied to filter out interference signals. Then, the frequency and phase difference of the two reconstructed signals are detected through the extended Kalman filter. Compared with the sliding Goertzel algorithm or discrete time Fourier transform, the proposed method does not need to predict the signal frequency and avoids quadratic error. Simulations and experiments show that the proposed method has stronger anti-interference, higher measurement accuracy and lower relative error than the existing method based on the Hilbert transformation.