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Flow Velocity Measurement Using a Spatial Averaging Method with Two-Dimensional Flexural Ultrasonic Array Technology.

Lei Kang1, Andrew Feeney2, Riliang Su3

  • 1Department of Physics, University of Warwick, Coventry CV4 7AL, UK. l.kang.1@warwick.ac.uk.

Sensors (Basel, Switzerland)
|November 7, 2019
PubMed
Summary
This summary is machine-generated.

A new spatial averaging method using flexural ultrasonic array transducers improves average flow velocity measurement accuracy. This technology reduces measurement uncertainty compared to traditional single-path ultrasonic flow meters.

Keywords:
flexural ultrasonic array transducerflow velocityspatial averagingtransit-time ultrasonic flow measurement

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Area of Science:

  • Fluid dynamics
  • Ultrasonic measurement technology
  • Industrial instrumentation

Background:

  • Accurate average flow velocity is critical for industries like automotive, chemical, and oil/gas.
  • Current ultrasonic transit-time methods face accuracy limitations due to turbulence, swirls, and meter errors.
  • Existing methods struggle with inherent fluid dynamic effects and systematic errors.

Purpose of the Study:

  • To introduce a novel spatial averaging method for enhanced ultrasonic flow velocity measurement.
  • To improve the accuracy and reduce the uncertainty of average flow velocity determination.
  • To overcome limitations of conventional ultrasonic flow measurement techniques.

Main Methods:

  • Development of a novel two-dimensional flexural ultrasonic array transducer with eight elements.
  • Implementation of a spatial averaging technique utilizing the array transducer.
  • Distribution of transducer paths across two chordal planes adjacent to a diametral plane.

Main Results:

  • The spatial averaging method achieved a root-mean-square deviation of 2.94% for average flow velocity.
  • Individual paths showed higher deviations, ranging from 3.65% to 8.87% (average 6.90%).
  • The proposed method significantly reduces measurement uncertainty compared to individual path measurements.

Conclusions:

  • The flexural ultrasonic array transducer and spatial averaging method enhance ultrasonic flow measurement accuracy.
  • This technology offers advantages for both single-path and multi-path ultrasonic flow meters.
  • The findings are expected to advance ultrasonic flow measurement in diverse industrial applications.