Electromagnetic Flow Detection Technology Based on Correlation Theory

Ge, Liang; Li, Hailong; Huang, Qi; Tian, Gui Yun; Wei, Guohui; Hu, Ze; Ahmed, Junaid

doi:10.1109/access.2020.2982474

Cited by 12 publications

(5 citation statements)

References 25 publications

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“…1 is 100 mA, and 2 is 200 mA. Substituting these into (1) and 3 As shown in Fig. 10, the rise time of zero to the first-step excitation current 1 is approximately 243 μs, and the rise time of the first to second-step excitation current 2 is approximately 219 μs .…”

Section: Figure 9 Excitation Current Rising Curve Under Different Vomentioning

confidence: 96%

“…In principle, it is suitable for measuring slurry-type fluids. An EMF will be affected by slurry noise [1] when measuring slurry. Slurry noise is the random noise produced by solid particles colliding with the electrode, which has the basic 1/f characteristic [2] [3] in the frequency spectrum; therefore, it has the following two characteristics.…”

Section: Introductionmentioning

confidence: 99%

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Study of the Ability of an Electromagnetic Flowmeter Based on Step Excitation to Overcome Slurry Noise

Yue

Chen

et al. 2020

IEEE Access

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An electromagnetic flowmeter (EMF) can be used to measure the speed of slurry fluid. In this paper, according to Maxwell's equations and the dB/dt vortex electric field, a step excitation scheme is proposed. The original excitation process of the primary excitation current rise time is divided into a twostep excitation process. Without increasing the excitation current rise time, the equivalent excitation frequency is increased by increasing the primary dB/dt. This method can enhance the EMF's ability to overcome slurry noise. The paper analyzes the design parameters of the step excitation scheme and designs the software and hardware. After that, the paper compares the step excitation scheme with the three-value rectangular wave excitation scheme based on wavelet transform signal processing. Experiments show that the step excitation EMF has a lower steady-state fluctuation rate when measuring mortar and has a stronger ability to overcome slurry noise. Additionally, the step excitation EMF and Yokogawa AXF 040G EMF are compared experimentally. Through flow calibration, clean water measurement, mortar measurement and dynamic response experiment, it is verified that the step excitation EMF has the ability to enhance the resistance to slurry noise at the same excitation frequency.

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Section: Figure 9 Excitation Current Rising Curve Under Different Vomentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Study of the Ability of an Electromagnetic Flowmeter Based on Step Excitation to Overcome Slurry Noise

Yue

Chen

et al. 2020

IEEE Access

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show abstract

“…Moreover, there is no component in the measuring pipeline of the electromagnetic flow sensor that blocks the measured medium, which makes it more suitable for measuring slurry fluid. [11][12][13][14] Therefore, electromagnetic flow sensors are usually used to measure slurry fluid.…”

Section: Problem Of Slurry Noisementioning

confidence: 99%

A study on structure improvement scheme of electromagnetic flow sensor for slurry flow measurement

Gao

2022

Measurement and Control

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A scheme to improve the structure of electromagnetic flow sensor is put forward in this paper, which can effectively solve the slurry noise problem when electromagnetic flowmeter measures slurry fluid. The electromagnetic flow sensor used for measuring slurry fluid has slurry noise interference in the measurement signal. At present, the method of increasing the excitation frequency of electromagnetic flow sensor is widely used to overcome slurry noise. However, high excitation frequency will lead to poor stability of zero point. In view of the shortcomings of existing methods, this paper studies the method of improving sensor structure to overcome slurry noise. Firstly, according to the mechanism of slurry noise, an improved scheme for the installation position of the measuring electrode of electromagnetic flow sensor is proposed, which can greatly reduce the probability of solid particles of slurry fluid colliding with the measuring electrode; Then, the relevant research results of bubble dynamics theory are applied to optimize the improvement scheme, and the improvement scheme is determined, through calibration, it is concluded that the improved sensor can reach the accuracy level of 1.0; Finally, through slurry measurement experiments, it is verified that the improved electromagnetic flow sensor can effectively overcome slurry noise.

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“…The output signal of the electromagnetic flow sensor used for measuring slurry fluid will frequently jump, which is shown as a random large jump signal. This phenomenon is called slurry noise [12][13][14][15].…”

Section: Introduction 1overview Of Slurry Noise Of Electromagnetic Fl...mentioning

confidence: 99%

A Combined Numerical-Experimental Study on the Noise Power Spectrum Produced by an Electromagnetic Sensor for Slurry Flow

Gao¹,

Jin²,

Liu³

2021

Fluid Dynamics &Amp; Materials Processing

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The signals generated by electromagnetic flow sensors used for slurry fluids are often affected by noise interference produced by interaction with the slurry itself. In this study, the power spectrum characteristics of the signal are studied, and an attempt is made to determine the relationship between the characteristics of the related noise and the velocity and concentration of the slurry fluid. Dedicated experiments are conducted and the related power spectrum curve is obtained processing the signal measured by the sensor with Matlab. Numerical simulations are also carried out in the frame of an Eulerian approach in order get additional insights into the considered problem through comparison with the experimental results. The following conclusions are drawn: (1) The intensity of noise is directly proportional to the number of solid particles colliding with the electrode of the electromagnetic flow sensor per unit time, and to the square of the average velocity of the flow layer near the pipe wall. (2) With an increase in the slurry noise intensity, the power spectrum curve shifts upward in the logarithmic coordinate system (and vice versa).

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Electromagnetic Flow Detection Technology Based on Correlation Theory

Cited by 12 publications

References 25 publications

Study of the Ability of an Electromagnetic Flowmeter Based on Step Excitation to Overcome Slurry Noise

Study of the Ability of an Electromagnetic Flowmeter Based on Step Excitation to Overcome Slurry Noise

A study on structure improvement scheme of electromagnetic flow sensor for slurry flow measurement

A Combined Numerical-Experimental Study on the Noise Power Spectrum Produced by an Electromagnetic Sensor for Slurry Flow

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