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Updated: Dec 8, 2025

High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition
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A Frequency-Correcting Method for a Vortex Flow Sensor Signal Based on a Central Tendency.

Bin Li1, Chengyi Wang1, Jie Chen1

  • 1School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, China.

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|September 23, 2020
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This study introduces a novel generalized mode method to improve vortex flow meter accuracy by filtering vibration noise. The new method enhances signal processing, ensuring reliable measurements even in noisy environments.

Keywords:
central tendencysignal processingvortex flow sensor

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Area of Science:

  • Engineering
  • Signal Processing
  • Measurement Science

Background:

  • Vortex flow meters using piezoelectric sensors are prone to vibration noise, affecting measurement accuracy.
  • Existing filter bank methods struggle to remove noise within specific frequency sub-bands.

Purpose of the Study:

  • To propose and validate a generalized mode method for vortex signal processing.
  • To enhance the anti-interference capabilities of vortex flow meters.
  • To improve the accuracy and real-time performance of vortex flow measurement systems.

Main Methods:

  • Developed a generalized mode method leveraging the central tendency of vortex signals.
  • Combined the generalized mode method with the filter bank technique.
  • Applied the integrated method to the signal-processing system of a vortex flow meter.

Main Results:

  • The combined filter bank and generalized mode method effectively filters sub-band noise, a limitation of traditional filter banks.
  • Simulation experiments confirmed the algorithm's feasibility and superior anti-interference performance.
  • Comparison with Fast Fourier Transform (FFT) methods showed the new algorithm requires a smaller sample size and offers better real-time performance.

Conclusions:

  • The proposed signal-processing system significantly improves the accuracy and repeatability of vortex flow meters.
  • The generalized mode method offers a robust solution for mitigating vibration noise in vortex flow measurements.
  • The developed algorithm presents a more efficient and effective alternative to existing FFT-based spectrum analysis methods.