Online monitoring of transit-time ultrasonic flowmeters based on fusion of optical observation

Dadashnialehi, Amir; Moshiri, Behzad

doi:10.1016/j.measurement.2011.02.010

Cited by 15 publications

(4 citation statements)

References 14 publications

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“…2019, 9, 1648 2 of 11 velocity distribution across the pipe [16]. A large amount of studies have been carried out to reduce the uncertainty caused by these three reasons [17][18][19][20]. For the first reason, Mahadeva et al [21,22] improved measurement accuracy by changing the distance between transducers.…”

Section: Introductionmentioning

confidence: 99%

Effects of Velocity Profiles on Measuring Accuracy of Transit-Time Ultrasonic Flowmeter

2019

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Ultrasonic wave carries the information for flowing velocity when it is propagating in flowing fluids. Flowrate can be obtained by measuring the propagation time of ultrasonic wave. The principle of transit-time ultrasonic flowmeters used today was based on that the velocity is uniform along the propagation path of the ultrasonic wave. However, it is well known that the velocity profiles in a pipe are not uniform both in laminar flow and turbulent flow. Emphasis on the effects of velocity profiles across the pipe on the propagation time of ultrasonic wave, theoretical flowrate correction factors considering the real velocity profile were proposed for laminar and turbulent flow to obtain higher accuracy. Experiment data of ultrasonic flowmeter and weighting method are compared to verify the proposed theoretical correction factors. The average relative error of proposed correction factor is determined to be 0.976% for laminar flow and 0.25% for turbulent flow.

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Section: Introductionmentioning

confidence: 99%

Effects of Velocity Profiles on Measuring Accuracy of Transit-Time Ultrasonic Flowmeter

2019

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“…The two key parameters liquid level and flow velocity are required for archiving this method. Earlier, several techniques and sensors are used for liquid level measurement such as liquid level sensor using float, capacitance liquid level sensor, static pressure liquid level sensor, and ultrasonic liquid level sensors [11]. Considering the characteristics and applications of various methods, ultrasonic liquid level sensor is adopted to measure the liquid level of mine open channel.…”

Section: Introductionmentioning

confidence: 99%

High-precision Ultrasonic Flowmeter for Mining Applications based on Velocity-area

Zhang

Rai

2018

TELKOMNIKA

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“…The possibility of focusing images for small sands in sediment-laden flow has come true with the development of modern ultrasound imaging technology [11,12]. Using B-mode ultrasound device [13][14][15] to show moving sediments in the water has the advantages of direct observation, high sensitivity and real time [16][17][18]. Consequently, experimental research on relationships between B-mode ultrasound imaging signals and SSCs is necessary.…”

Section: Introductionmentioning

confidence: 99%

Relationships between B-mode ultrasound imaging signals and suspended sediment concentrations

et al. 2016

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Ultrasound imaging technique is applied to river model test in recent years, but the imaging features and inner relationships of sediments are still waiting for further study. This paper proposes some new relationships between B-mode ultrasound imaging signals and suspended sediment concentrations (SSC) after kinds of model experiments are conducted in a glass flume. And the influences of particle size, sediment material, ultrasonic frequency and flow velocity on the relationships are discussed in practical applications. Results show that the imaging area concentration (IAC), gray area concentration (GAC) and gray energy density (GED) of sediment imaging signals increase with the addition of sediments until images are filled with imaging signals. The GAC is the best one because of the widest variation range and better sensitivity when compared with the IAC. The GED is the most sensitive to the change of SSC, but it is easiest to reach saturation. The relationship between the GAC and actual SSC can be used to estimate unknown SSC and its vertical distribution when the concentration is below 4.0 ‰ with advantages of direct observation and real time.

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Online monitoring of transit-time ultrasonic flowmeters based on fusion of optical observation

Cited by 15 publications

References 14 publications

Effects of Velocity Profiles on Measuring Accuracy of Transit-Time Ultrasonic Flowmeter

Effects of Velocity Profiles on Measuring Accuracy of Transit-Time Ultrasonic Flowmeter

High-precision Ultrasonic Flowmeter for Mining Applications based on Velocity-area

Relationships between B-mode ultrasound imaging signals and suspended sediment concentrations

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