Study of the influence of temperature on the measurement accuracy of transit-time ultrasonic flowmeters

Ge, Liang; Deng, Hongxia; Wang, Qing; Hu, Ze; Li, Junlan

doi:10.1108/sr-01-2018-0005

Cited by 10 publications

(7 citation statements)

References 14 publications

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“…Based on Faraday's law of electromagnetic induction, the ideal output induction electromotive force for an ideal laminar flow circle channel is expressed as [21]:…”

Section: A Basic Theory Of Downhole Annular Flow Electromagnetic Meamentioning

confidence: 99%

“…In this experiment, P is 30 percent. If some finite elements satisfy formula (21), it can be considered that the region composed of the points satisfying this condition is the vector weight function w uniform region in the annular channel, while the region composed of the points not satisfying the above formula is the vector weight function w non-uniform region in the annulus channel. Assuming that the number of points constituting the non-uniform region is N1 and the number of points constituting the uniform region is N2, the definition of the proportion of the uniform range can be proposed as shown in equation (22).…”

Section: A Aluation Systemmentioning

confidence: 99%

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Electrodes Optimization of an Annular Flow Electromagnetic Measurement System for Drilling Engineering

Huang

et al. 2020

IEEE Access

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The early monitoring of downhole overflow can be effectively realized by the downhole annular electromagnetic flow detection system. In order to improve the accuracy of the electromagnetic measurement system of downhole annular flow, it is important to optimize the excitation system and electrodes of this system. This research focuses on the optimization of the electrodes for the electromagnetic measurement system of downhole annular flow, whose excitation system has been optimized. First, the basic principle of electromagnetic measurement of downhole annular flow is analyzed. Then, the influence of different positions of the four-point electrodes on the virtual current distributions is analyzed, and the optimum electrode positions and distributions are introduced. On this basis, the influence of shape and size of the large electrode on virtual current density distribution is analyzed. Based on the theoretical study of the influence of electrode on virtual current density distribution, taking hemispherical electrodes and arc electrodes as examples, this paper optimizes hemispherical electrodes and arc electrodes with different shapes and sizes by using finite element simulation method, and proposes three indexes to evaluate the annular virtual current density distributions when the electrodes of different shapes are used. The optimum parameters of shapes and sizes of the hemisphere electrodes and arc electrodes under specific structures of the downhole annular electromagnetic flow measurement system are obtained. This research has great significance for the optimization of electrodes in the downhole annular electromagnetic flow measurement system, and can also be used as reference for the electrode optimization of the traditional electromagnetic flowmeter.

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“…Based on Faraday's law of electromagnetic induction, the ideal output induction electromotive force for an ideal laminar flow circle channel is expressed as [21]:…”

Section: A Basic Theory Of Downhole Annular Flow Electromagnetic Meamentioning

confidence: 99%

Section: A Aluation Systemmentioning

confidence: 99%

Electrodes Optimization of an Annular Flow Electromagnetic Measurement System for Drilling Engineering

Huang

et al. 2020

IEEE Access

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“…The Laboratory Annular Flow Electromagnetic Measurement System. Based on previous studies [20][21][22][23][24][25][26][27], the block diagram of the annular flow electromagnetic measurement system using double-frequency excitation was designed, as shown in Figure 6. The system hardware included an electromagnetic flow sensor and electromagnetic sensor converter.…”

Section: System Design and Experiments Workmentioning

confidence: 99%

Measurement of Annular Flow for Drilling Engineering by Electromagnetic Flowmeter Based on Double-Frequency Excitation

Tian

et al. 2019

Journal of Sensors

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Using downhole annular electromagnetic flow measurement to obtain annular flow in real-time is a foundation of microflow control drilling technology. The existing annular flow electromagnetic measurement method based on low-frequency rectangular excitation is affected by slurry interference and formation fluid invasion, which results in large noise generated on the electrode output signal. These noise causes the instability of the flow measurement system output and lower accuracy. Double-frequency rectangular wave excitation has the advantages of excellent zero-point stability attributed to low-frequency rectangular wave excitation and fast response speed with great ability to suppress slurry interference. First, the double-frequency rectangular wave excitation for annular flow electromagnetic measurement is researched, and its corresponding electromagnetic induction signal process is investigated. In order to verify the feasibility of downhole annular electromagnetic flow measurement, a flow verification platform for comparison of standard and detected parameters is established for simulation experiment, and the ability to suppress slurry interference and response speed of the technology in downhole slurry flow measurement are analyzed. The test results show that the downhole annular electromagnetic flow measurement based on double-frequency rectangular wave excitation can not only satisfy the requirements of regular electromagnetic flow measurement but also suppress the annular slurry interference effectively.

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“…At present, fluidic flow-monitoring technologies mainly include electromagnetic, mechanical, ultrasonic, and so on . However, these monitoring methods generally have some problems, such as low measurement accuracy of pressure flow sensors, poor anti-interference ability of ultrasonic flow sensors, and high cost of electromagnetic flow sensors. − Therefore, it is necessary to propose a novel method for the non-full pipe fluidic flow monitoring of large pipelines.…”

Section: Introductionmentioning

confidence: 99%

Self-Powered Sensing for Non-Full Pipe Fluidic Flow Based on Triboelectric Nanogenerators

Wang

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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Fluidic flow monitoring of a non-full pipe is of great significance in the field of energy measurement and pipeline transportation. In this work, a monitoring method based on triboelectric nanogenerators for non-full pipe fluidic flow of large pipelines is proposed. Specifically, a triboelectric non-full pipe flow sensor (TNPFS) is fabricated, which can monitor the flow velocity and the liquid level simultaneously, and then the flow can be obtained by conversion. For flow velocity monitoring, the flexible blades slide between electrodes, generating periodic electrical signals. Interestingly, the frequencies of the voltage and flow velocities show a good linear relationship. For liquid level monitoring, according to the principle of liquid–solid contact electrification, a variable area interdigital electrode with a stable signal distributed on a polytetrafluoroethylene tube is designed. The experiments demonstrate that the peak number and trend of the voltage derivative curve are related to the liquid level. Finally, a real-time flow-monitoring system is established to effectively monitor the flow from 94 to 264 L/min. Compared with the actual measured flow, the error rate is under 1.95%. In addition to this, the TNPFS also has good responsiveness in sewage. This work provides a novel method for fluidic flow monitoring, especially the non-full pipe flow of large pipelines.

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Study of the influence of temperature on the measurement accuracy of transit-time ultrasonic flowmeters

Cited by 10 publications

References 14 publications

Electrodes Optimization of an Annular Flow Electromagnetic Measurement System for Drilling Engineering

Electrodes Optimization of an Annular Flow Electromagnetic Measurement System for Drilling Engineering

Measurement of Annular Flow for Drilling Engineering by Electromagnetic Flowmeter Based on Double-Frequency Excitation

Self-Powered Sensing for Non-Full Pipe Fluidic Flow Based on Triboelectric Nanogenerators

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