Design and realization of all digital closed-loop system of Coriolis mass flowmeter

Shuai Wang*, Dezhi Zheng, Shangchun Fan, Jing Tian

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The digital closed-loop system of Coriolis mass flowmeter (CMF), in which the field-programmable gate array (FPGA) and digital signal processing methods were used to realize stable and accurate closed-loop control, has good real time and high precision. The speed parallel component FPGA was adopted as core of calculation and control. The first in first out (FIFO) module was brought in the phase control, which change time difference by controlling the read and write request signals of FIFO, to realize the stable and accurate control of phase difference between vibrating and exciting signal. The amplitude was set rapidly and precisely by using nonlinear amplitude control manner with well adaption, which combined discontinuous and continuous amplitude control. It gets the good amplitude control to the vibrating signals, which was output stable by controlling. The measurement accuracy and stability were improved. The experimental results show that the dynamic response and stability of the system is improved. From the real-flow calibration tests, that CMF digital closed-loop is better than traditional analogue closed-loop in stability, dynamic response and repeatability. Furthermore, the measuring precision of CMF is enhanced.

Original languageEnglish
Pages (from-to)844-848+854
JournalBeijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics
Volume37
Issue number7
Publication statusPublished - Jul 2011
Externally publishedYes

Keywords

  • Amplitude control
  • Closed-loop systems
  • Coriolis force
  • Flowmeters
  • Phase control

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