Sensors (2015-12-01) An Integrated Instrumentation System for Velocity, Concentration and Mass Flow Rate Measurement of Solid Particles Based on Electrostatic and Capacitance Sensors Jian Li, Ming Kong, Chuanlong Xu, Shimin Wang, Ying Fan; Affiliations ...

velocity measurement method using an electrostatic sensor array (ESA) can be classified into two categories, namely the local velocity measurement method in the near-electrode region and the tomography method.

Feb 18, 2010· Abstract: This paper reports recent developments of electrostatic sensors for the continuous velocity measurement of particles in pneumatic conveying pipelines. The optimization of intrusive electrostatic sensors is investigated through finite-element modeling and experimental evaluation. The effects of electrode dimensions and intrusion depth on sensor signals and correlation-based velocity ...

(2015). Local Particle Mean Velocity Measurement in Pneumatic Conveying Pipelines Using Electrostatic Sensor Arrays. Particulate Science and Technology: Vol. 33, 2013 Conference on Powder and Granular Bulk Solids: Innovations and Applications (PGBSIA), Part 1, pp. 81-90.

The electrostatic sensors are used for particle mean velocity measurement in combination with the cross-correlation technique, while the capacitance sensor with helical surface-plate electrodes, which has relatively homogeneous sensitivity distribution, is employed for the measurement of particle concentration and its capacitance is measured by ...

Oct 04, 2019· Abstract: The minimum conveying velocity or the lowest point of pressure drop curve can reflect the characteristics of particles moving from deposition to suspension in pneumatic conveying. However, when the mass flow rate is low, the change of particles flow cannot be effectively reflected by the above methods. In this paper, based on a 4-arc electrode electrostatic sensor…

Recently, the ring-shaped electrostatic sensor has been used to measure particle average velocity and characterize the nonlinear behavior of the particle movement in the dense-phase pneumatic transport system [7, 17]. However, it has the limitations of characterizing the local particles velocity …

Oct 01, 2012· Particle velocity is one of the important parameters describing the flow state of gas–solid two-phase systems. In this paper, a novel spatial filtering method based on an electrostatic sensor matrix (ESM) is proposed for local particle mean velocity measurement in a …

The accuracy of local particle mean velocity measurement with spatial filtering method based on an electrostatic sensor matrix (ESM) is closely related to its sensitivity and spatial filtering characteristics. In this paper, the three-dimensional electrostatic field generated by a point charge in the sensing zone of the ESM is solved by using a finite element method to obtain the spatial ...

Jul 02, 2019· An electrostatic sensor is a powerful tool for measuring flow parameters of gas-solid flow. In this study, a linear electrostatic sensor matrix (LESM) is designed to measure local particle average velocity within pipeline. The 3D simulation model of the LESM is built, and its spatial filtering effect is analyzed by the finite element method.

electrostatic sensor was proposed in the literatures (Xu et al 2006, Xu and Wang 2007,Xu2006). Based on the frequency analysis and the determination of the peak frequency of the output signal of the sensor, the new method achieves particle velocity measurement only using a single electrostatic sensor…

Aug 01, 2017· The associated particle size reduction was monitored. Three electrostatic sensors were embedded along the pipeline to monitor the flow. The results indicated a decreasing trend in the electrostatic sensor outputs with decreasing particle size, which suggested the attenuation of the flow velocity fluctuation.

Three electrostatic sensors were embedded along the pipeline to monitor the flow. The results indicated a decreasing trend in the electrostatic sensor outputs with decreasing particle size, which suggested the attenuation of the flow velocity fluctuation.

Jan 07, 2008· This property of the electrostatic sensor is defined as the spatial sensitivity s(x, y). In equation , it can be seen that if the particle velocity profile is uniform, the velocity measured by the spatial filter is equal to the average velocity …

Electrostatic Sensor 40 Solids Particle Velocity Measurement using Electrostatic Sensor 45 Doppler Method to Measure the Velocity 46 Cross Correlation Method to Measure the Velocity 49 Spatial Filtering Method to Measure the Velocity 53 Optimization of Electrostatic Sensor 54 Particle Swarm Optimization Technique 55

filter, and the radial position, the axial length of the electrode, particle velocity and particle size have important effects on the temporal frequency characteristics of the measurement system. Comment: Different sizes of particles will induces different charge. 3 Characterization of electrostatic sensors …

Jul 14, 2016· Xu C, Tang G, Zhou B, Wang S (2009) The spatial filtering method for solid particle velocity measurement based on an electrostatic sensor. Meas Sci Technol 20(4):045404. Article Google Scholar 8. Krabicka J, Yan Y Finite element modelling of intrusive electrostatic sensors for the measurement of pulverised fuel flows.

The paper proposes a method to measure the mean velocity of solid particles based on the spatial filtering effect of the electrostatic sensor. To determine the relationship between the spatial frequency characteristics of the sensor and solid particle velocity, a general formula is derived by analyzing quantitatively the spatial filtering characteristics of the electrostatic sensor along with ...

Apr 20, 2020· The flow dynamics of binary particle mixtures in the fluidized bed needs to be monitored in order to optimize the related industrial processes. In this paper, electrostatic sensing and high-speed imaging are applied to measure the velocities of polyethylene and sand particles in the binary particle …

Thus, an electrostatic sensor array comprising eight arc-shaped electrodes was designed. The relationship between the cross-correlation (CC) velocity and the distribution of particle velocity, charge density and electrode spatial sensitivity was analysed. Then the …

Jul 14, 2016· Xu C, Tang G, Zhou B, Wang S (2009) The spatial filtering method for solid particle velocity measurement based on an electrostatic sensor. Meas Sci Technol 20(4):045404. Article Google Scholar 8. Krabicka J, Yan Y Finite element modelling of intrusive electrostatic sensors …

Apr 01, 2021· Abstract. This paper presents a study of aero-engine exhaust gas electrostatic sensor array to estimate the spatial position, charge amount and velocity of charged particle. Firstly, this study establishes a mathematical model to analyze the inducing characteristics and obtain the spatial sensitivity distribution of sensor array.

Feb 08, 2019· Particle velocity is an important parameter of dense-phase gas–solid flow for both monitoring and control purposes. This paper presents a recent development in the noncontact measurement of solid particle velocity using an electrostatic sensor array (ESA).

Jan 02, 2021· In this study, an inner-inserted electrostatic sensor array consisting of nine pairs of electrodes is implemented to measure the cross-sectional velocity and concentration profiling of particles over the whole cross section in a square-shaped pipe.

Feb 01, 2020· Since 1980s, electrostatic sensors are applied to indicate the particle flow and are gradually improved , , . Electrostatic sensors are used for several applications including tomography system , Solid particles velocity …

An electrostatic sensor is a powerful tool for measuring flow parameters of gas-solid flow. In this study, a linear electrostatic sensor matrix (LESM) is designed to measure local particle average velocity within pipeline. The 3D simulation model of the LESM is built, and its spatial filtering effect is analyzed by the finite element method.

Feb 01, 2021· The particle velocity and solid distribution (or profile) in the pipe cross section can also be obtained using an array of electrostatic sensors , which normally consist of a number of identical strip-shaped electrodes across the cross section of the pipe.

Keywords: electrostatic sensor array, particle velocity measurement, pulverized coal, coal-fired power plant. 1. Introduction Multi-phase flows have been widely applied in coal-fired power industries. For example, the pulverized coal in pneumatic conveying pipelines is dilute gas-solid two-phase flow, and the particle velocity …

Sep 04, 2012· Abstract: The signal quality and accuracy of the spatial filtering method for solid particle velocity measurement based on a linear electrostatic sensor array (LESA) are dependent on the spatial filtering characteristics of the LESA and particle distribution in a pneumatic conveying pipeline. In this paper, the charge induced on a circular LESA with different geometric sizes from a single ...

Nov 09, 2015· This is achieved using an array structure of five electrostatic sensors across the whole diameter of the pipe to measure the particle velocity and concentration profiles. Experimental tests were carried out on a laboratory-scale test rig over a range of particle velocities.

The inside of the plates is serrated to eliminate particles striking the sides. A post-analysis electrostatic lens consisting of two wire grids, one at the potential of the inner plate and one at the potential of ground, focuses particles strongly upon the center of the sensor. A spiraltron particle sensor detects the charged particles.

Mar 10, 2009· The spatial filtering method for solid particle velocity measurement based on an electrostatic sensor. Chuanlong Xu, Guanghua Tang, Bin Zhou and Shimin Wang. Published 10 …

Using electrostatic sensors, previous researches studied particle sizing using magnitude dependent analysis which is a highly conditional method where the results can be affected by other parameters such as particle mass flow rate, velocity and

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