Energy transfer model and its applications of ultrasonic gas flow-meter under static and dynamic flow rates

The Review of Scientific Instruments
Min FangZi-Wen Shen

Abstract

Most of the ultrasonic gas flow-meters measure the gas flow rate by calculating the ultrasonic transmission time difference between the downstream and upstream. Ultrasonic energy attenuation occurs in the processes of the ultrasonic generation, conversion, transmission, and reception. Additionally, at the same time, the gas flow will also affect the ultrasonic propagation during the measurement, which results in the ultrasonic energy attenuation and the offset of ultrasonic propagation path. Thus, the ultrasonic energy received by the transducer is weaker. When the gas flow rate increases, this effect becomes more apparent. It leads to the measurement accuracy reduced, and the measurement range narrowed. An energy transfer model, where the ultrasonic gas flow-meter under without/with the gas flow, is established by adopting the statistical analysis and curve fitting based on a large amount of experimental data. The static sub model without the gas flow expresses the energy conversion efficiency of ultrasonic gas transducers, and the dynamic sub model with the gas flow reflects the energy attenuation pattern following the flow rate variations. The mathematical model can be used to determine the minimum energy of the excitation s...Continue Reading

References

Jun 20, 2006·Ultrasonics·L C Lynnworth, Yi Liu
Jan 1, 1989·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·K S Mylvaganam

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Citations

Sep 30, 2021·Bioinspiration & Biomimetics·Ruihao Wang, Rolf Müller

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