An Extracting Algorithm of Ultrasonic Doppler Shift for Multiphase Fluid Flow Measurement

Xin Liang Cao; Wei Cui; Meng De Wang

doi:10.4028/www.scientific.net/AMM.494-495.817

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 494-495An Extracting Algorithm of Ultrasonic Doppler...

An Extracting Algorithm of Ultrasonic Doppler Shift for Multiphase Fluid Flow Measurement

Abstract:

Because of the complexity for the frequency measurement about echo signal of ultrasonic Doppler flow, the acquisition methods directly affect the accuracy of Doppler frequency shift. The algorithm of power spectrum extraction has accurate to detection echo Doppler frequency of stationary signal for the flow-velocity measurement. The key is to obtain relative useful frequency information from complex echo velocity. This study is based on the principle of Doppler velocity measurement, by studying the average frequency algorithm of echoes, and the Fourier transform method is adopted to identify Doppler signal frequency and Doppler frequency shift which was polluted by aliasing noise. The MATLAB simulation results show: the useful frequency to obtain reliable, accurate, and also laid the foundation for the measurement of multiphase flow non-stationary signals.

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Periodical:

Applied Mechanics and Materials (Volumes 494-495)

Pages:

817-820

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.494-495.817

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Online since:

February 2014

Authors:

Xin Liang Cao*, Wei Cui, Meng De Wang

Keywords:

Doppler Effect, Flow Velocity, Frequency Extraction, Ultrasonic

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* - Corresponding Author

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