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Multipath Ultrasonic Gas Flow-meter Based on Multiple Reference Waves by Hongliang Zhou; Tao Ji; Ruichen Wang; Xiaocheng Ge; Xiaoyu Tang; Shizhen Tang is a Engineering article available to read on EtoBox.

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Several technologies can be used in ultrasonic gas flow-meters, such as transit-time, Doppler, cross-correlation and etc. In applications, the approach based on measuring transit-time has demonstrated its advantages and become more popular. Among those techniques which can be applied to determine time-of-flight (TOF) of ultrasonic waves, including threshold detection, cross correlation algorithm and other digital signal processing algorithms, cross correlation algorithm has more advantages when the received ultrasonic signal is severely disturbed by the noise. However, the reference wave for cross correlation computation has great influence on the precise measurement of TOF. In the applications of the multipath flow-meters, selection of the reference wave becomes even more complicated. Based on the analysis of the impact factors that will introduce noise and waveform distortion of ultrasonic waves, an averaging method is proposed to determine the reference wave in this paper. In the multipath ultrasonic gas flow-meter, the analysis of each path of ultrasound needs its own reference wave. In case study, a six-path ultrasonic gas flow-meter has been designed and tested with air flow

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Author

Hongliang Zhou; Tao Ji; Ruichen Wang; Xiaocheng Ge; Xiaoyu Tang; Shizhen Tang

Publisher

Elsevier BV

Published

2018

Language

EN

Field

Engineering (Physical Sciences)