Ultra-high resolution phase difference measurement method

2012 ◽  
Author(s):  
Shaofeng Dong ◽  
Wei Zhou ◽  
Baoqiang Du ◽  
Changzhe Jiao
Keyword(s):  
High Resolution ◽  
Phase Difference ◽  
Measurement Method ◽  
Difference Measurement

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

2019 ◽  
Vol 19 (2) ◽  
pp. 48-52
Author(s):  
Nan Chen ◽  
Shangchun Fan ◽  
Dezhi Zheng
Keyword(s):  
Kalman Filter ◽  
Extended Kalman Filter ◽  
Phase Difference ◽  
Measurement Method ◽  
Measurement Accuracy ◽  
Single Phase ◽  
Signal Frequency ◽  
Difference Measurement ◽  
Mallat Algorithm ◽  
Interference Signals

Abstract 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.

A New Phase Difference Measurement Method and Its Implementation Based on FPGA

2012 ◽  
Vol 10 (5) ◽  
pp. 1270-1275 ◽  
Author(s):  
LV Chang-Zhi ◽  
Di Fan ◽  
Mao-Yong Cao ◽  
Qin-Guang Cai ◽  
Hong Yu
Keyword(s):  
Phase Difference ◽  
Measurement Method ◽  
Difference Measurement ◽  
New Phase

scholarly journals Phase Difference Measurement Method Based on Progressive Phase Shift

Electronics ◽  
2018 ◽  
Vol 7 (6) ◽  
pp. 86 ◽  
Author(s):  
Min Zhang ◽  
Hai Wang ◽  
Hongbo Qin ◽  
Wei Zhao ◽  
Yan Liu
Keyword(s):  
Phase Shift ◽  
Phase Difference ◽  
Measurement Method ◽  
Difference Measurement
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