New measurement method for very low liquid flow rates using ultrasound

Terabe, Masaki; Ishikawa, Hideaki; Shimizu, Katsuyuki; Monji, Hideaki; Matsui, Goichi

doi:10.1016/s0955-5986(01)00023-1

Cited by 36 publications

(22 citation statements)

References 1 publication

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“…In practice, each time interval is measured several times (difference between two single wave packets). In the result, the average time interval obtained during the measurement process (a single time interval measurement) is described by the equation: 1 …”

Section: Input Circuit and Time Interval Measurement Methodsmentioning

confidence: 99%

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Ultrasonic Flow Measurement with High Resolution

Grzelak

Czoków

Kowalski

et al. 2014

Metrology and Measurement Systems

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The ultrasonic flowmeter which is described in this paper, measures the transit of time of an ultrasonic pulse. This device consists of two ultrasonic transducers and a high resolution time interval measurement module. An ultrasonic transducer emits a characteristic wave packet (transmit mode). When the transducer is in receive mode, a characteristic wave packet is formed and it is connected to the time interval measurement module inputs. The time interval measurement module allows registration of transit time differences of a few pulses in the packet. In practice, during a single measuring cycle a few time-stamps are registered. Moreover, the measurement process is also synchronous and, by applying the statistics, the time interval measurement uncertainty improves even in a single measurement. In this article, besides a detailed discussion on the principle of operation of the ultrasonic flowmeter implemented in the FPGA structure, also the test results are presented and discussed.

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Section: Input Circuit and Time Interval Measurement Methodsmentioning

confidence: 99%

“…Ultrasonic flowmeters are a very fast-growing type of flow measurement devices [1,2]. Although the measurement principle was well known at the end of the XIX century, the first devices appeared in the second half of the XX century.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Flow Measurement with High Resolution

Grzelak

Czoków

Kowalski

et al. 2014

Metrology and Measurement Systems

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show abstract

“…The authors also presented several advantages of ultrasonic flowmeters such as minimized loss of pressure, low consumption cost and full functionality. A very small ultrasonic flowmeter for liquids with measuring pipe diameter 85 down to 0.5 mm was developed using disk ultrasonic transducers in [8]. This flowmeter can measure a liquid flow rate below 1 ml/min, which corresponds to a Reynolds number of about 40.…”

Section: Introductionmentioning

confidence: 99%

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

Zhang

Rai

2018

TELKOMNIKA

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“…1(b) [2,3]. One transducer vibrating in the radial direction generates axisymmetric elastic waves on the pipe.…”

Section: Introductionmentioning

confidence: 99%

“…When the waves are detected by the other transducer, the flow speed in the pipe is measured. This method was applied to measure the flow rate in a pipe of 0.5 mm-diameter by using piezoelectric discs with a hole at its center [2].…”

Section: Introductionmentioning

confidence: 99%

Generation and propagation of elastic waves on a pipe by open-shell transducers

Kim

2011

J Mech Sci Technol

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This paper deals with the generation and propagation of elastic waves on an empty pipe and on a water-filled pipe by open-shell transducers theoretically, numerically, and experimentally. The dispersion equations relating wave speed to frequency were derived by using the cylindrical shell theory. The theoretical analysis was verified by comparing the calculated dispersion curves with the frequencywavenumber spectrums obtained from the finite-element analysis and by comparing the calculated wave speeds with the results measured by using open-shell transducers as transmitters and receivers. The finite-element analysis revealed that the waves of only evennumbered wave modes were generated by the open-shell transducers symmetrically located along the circumference of the pipe and that the axisymmetric wave propagates faster than non-axisymmetric waves.

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New measurement method for very low liquid flow rates using ultrasound

Cited by 36 publications

References 1 publication

Ultrasonic Flow Measurement with High Resolution

Ultrasonic Flow Measurement with High Resolution

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

Generation and propagation of elastic waves on a pipe by open-shell transducers

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