Applied digital signal processing systems for vortex flowmeter with digital signal processing
Related Experiment Video
Updated: Jun 25, 2026

High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition
Published on: June 27, 2025
Ke-Jun Xu1, Zhi-Hai Zhu, Yang Zhou
1Institute of Automation, Hefei University of Technology, Hefei 230009, People's Republic of China. xukejun@mail.hf.ah.cn
Abstract:
The spectral analysis is combined with digital filter to process the vortex sensor signal for reducing the effect of disturbance at low frequency from pipe vibrations and increasing the turndown ratio. Using digital signal processing chip, two kinds of digital signal processing systems are developed to implement these algorithms. One is an integrative system, and the other is a separated system. A limiting amplifier is designed in the input analog condition circuit to adapt large amplitude variation of sensor signal. Some technique measures are taken to improve the accuracy of the output pulse, speed up the response time of the meter, and reduce the fluctuation of the output signal. The experimental results demonstrate the validity of the digital signal processing systems.
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