Liquid Flow Measurement Using Silicone Polymer Wedge Clamp-On Ultrasonic Transducers

Li, Zhichao; Hughes, F.; Kerr, Noel C.; Wilson, Richard A.; Dixon, Steve

doi:10.1109/tim.2019.2954235

Cited by 7 publications

(2 citation statements)

References 22 publications

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“…The piezoelectric element in transducer A, shown in green, will be driven to emit a pulse of ultrasound which mode converts to a shear wave in the pipe wall, with the angle of refraction determined by Snell's law. The angle of the transducer wedge is usually chosen such that the angle of incidence is beyond the critical angle for the compression wave [8]. At the pipe wall -fluid boundary, the shear wave is mode converted again into a compression wave in the fluid.…”

Section: Theorymentioning

confidence: 99%

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Transducer Design for Clamp-on Guided Wave Flow Measurement in Thin-Walled Pipes

Smith

Dixon

2022

IEEE Sensors J.

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Clamp-on ultrasonic transit time difference flow meters provide opportunities for metering where it is impractical or undesirable to cut into an existing pipeline to install an alternative flow meter. Up until now, it has been difficult to perform this type of measurement on thin-walled metal pipes, due to the difficulty of interpreting the guided wave modes in the combined pipe wall and internal fluid system, but a new method has been reported recently that utilises these guided wave modes for flow measurement. Through computational modelling, and construction and testing of different transducers, the design considerations for clamp-on transducers are highlighted and their impact on guided wave flow rate measurement is evaluated. The design features considered include a curved contact face to provide focusing of the ultrasound within the pipe and a scattering surface to reduce internal reflections. It is found that additional unwanted ultrasonic modes can be minimised by ultrasonic transducer wedge design features such as profiling the curvature of the transducer to conform to the pipe wall or creating a scattering edge to minimise internal wedge reflections. It is also observed that minimising these unwanted modes does not offer any advantage for the transit time difference measurement used in calculating flow.

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Section: Theorymentioning

confidence: 99%

“…1, where the TTD is 20ns. It can be shown that the relationship between the flow velocity, v l , and the TTD, t, is given by [8], [9]…”

Section: Theorymentioning

confidence: 99%

Transducer Design for Clamp-on Guided Wave Flow Measurement in Thin-Walled Pipes

Smith

Dixon

2022

IEEE Sensors J.

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A critical review of the state of the art literature in the monitoring of ultrasonic machining process and tool failure prediction

Mirad

Das

2021

Engineering Failure Analysis

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Simultaneous data acquisition for improved performance in transit time difference ultrasonic flowmeters

Smith

Greenshields

Burton

et al. 2023

Flow Measurement and Instrumentation

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Liquid Flow Measurement Using Silicone Polymer Wedge Clamp-On Ultrasonic Transducers

Abstract: Please refer to published version for the most recent bibliographic citation information. If a published version is known of, the repository item page linked to above, will contain details on accessing it.

Cited by 7 publications

References 22 publications

Transducer Design for Clamp-on Guided Wave Flow Measurement in Thin-Walled Pipes

Transducer Design for Clamp-on Guided Wave Flow Measurement in Thin-Walled Pipes

A critical review of the state of the art literature in the monitoring of ultrasonic machining process and tool failure prediction

Simultaneous data acquisition for improved performance in transit time difference ultrasonic flowmeters

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