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

被引：5

作者：

Chen, Nan ^{[1
,2
]}

Fan, Shangchun ^{[1
]}

Zheng, Dezhi ^{[1
]}

机构：

[1] Beihang Univ, Sch Instrumentat & Optoelect Engn, Beijing 100191, Peoples R China

[2] Beijing Polytech, Sch Mech & Elect Engn, Beijing 100176, Peoples R China

来源：

MEASUREMENT SCIENCE REVIEW | 2019年 / 19卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Coriolis mass flowmeter; phase difference; extended Kalman filter; Mallat algorithm;

D O I：

10.2478/msr-2019-0008

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

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.

引用

页码：48 / 52

页数：5

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