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Updated: Jun 2, 2026
05:11
High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition
Published on: June 27, 2025
Note: ultrasonic gas flowmeter based on optimized time-of-flight algorithms.
1Department of Electronic Science and Technology, Dalian University of Technology, Dalian, 116023, China.
The Review of Scientific Instruments
|May 3, 2011
Summary
A novel ultrasonic gas flowmeter uses advanced signal processing for accurate flow rate measurements. This digital signal processor-based device meets stringent industry standards, achieving less than 0.8% nominal accuracy.
Area of Science:
- Engineering
- Instrumentation
- Acoustics
Background:
- Accurate gas flow measurement is critical in various industries.
- Existing ultrasonic flowmeters face challenges in achieving high precision under diverse conditions.
Purpose of the Study:
- To design and validate a high-accuracy, single-path ultrasonic gas flowmeter.
- To implement optimized signal processing techniques for improved measurement reliability.
Main Methods:
- Development of a digital signal processor (DSP) based ultrasonic flowmeter.
- Utilizing a transmit-receive technique with amplitude and phase modulation.
- Employing signal-to-noise ratio discrimination and adaptive time-of-flight algorithms.
Main Results:
- The flowmeter prototype successfully passed dry calibration tests, meeting American Gas Association Report No. 9 requirements.
- Wet calibration demonstrated accurate flow rate measurements in practical scenarios.
- Achieved nominal accuracies below 0.8% after flow-weighted mean error (FWME) adjustment.
Conclusions:
- The designed ultrasonic gas flowmeter offers high accuracy and reliability.
- The integrated signal processing methods effectively enhance measurement performance.
- The prototype meets rigorous industry standards for gas flow measurement.
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