Minimizing the Zero-Flow Error in Transit-Time Ultrasonic Flow Meters

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Minimizing the Zero-Flow Error in Transit-Time Ultrasonic Flow Meters

Conference Paper (2018)

Author(s)

Douwe van Willigen (TU Delft - Electrical Engineering, Mathematics and Computer Science)

Paul van Neer (TNO, ImPhys/Acoustical Wavefield Imaging )

Jack Massaad (ImPhys/Acoustical Wavefield Imaging )

Martin Verweij (Erasmus MC, ImPhys/Acoustical Wavefield Imaging )

Nicolaas de Jong (Erasmus MC, ImPhys/Acoustical Wavefield Imaging )

Michiel Pertijs (TU Delft - Electrical Engineering, Mathematics and Computer Science)

Research Group

Electronic Instrumentation

Resonance frequency Measurement uncertainty Impedance RLC circuits Transducers Impedance measurement Meters

DOI related publication

https://doi.org/10.1109/ULTSYM.2018.8579771 Final published version

To reference this document use

https://resolver.tudelft.nl/uuid:2a04a883-7ca0-49a3-8e19-e6a0a8e7e317

More Info

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Publication Year

2018

Language

English

Abstract

Transit-time ultrasonic flow meters are based on the fundamental idea that the flow is the only non-reciprocal effect between an upstream and downstream measurement. Non-identical transducers can be used in a reciprocal manner if the circuit is made reciprocal. In this paper we analyze the effect of driver- and readout electronics on the zero-flow error in transit-time ultrasonic flow meters by simulation and measurement. Using the frequency characteristic of two nonidentical transducers, the cause of the zero-flow error in nonreciprocal circuits is evaluated. Both simulation and measurement results show that the lowest zero-flow error can be obtained by using circuits that have an impedance significantly higher or lower than the impedance of the transducers.