Journal ArticleDOI
Mass flow measurement of pneumatically conveyed solids using electrical capacitance tomography
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TLDR
In this paper, a measurement system for mass flow measurement in a pneumatic pipeline is described, which consists of a volumetric concentration sensor and a velocity sensor, which is used to detect various velocity profiles and solids distributions and provide an absolute mass flow rate of solids within a good agreement with the reference reading from load cells.Abstract:
This paper describes a measurement system for mass flow measurement in a pneumatic pipeline. The system mainly consists of a volumetric concentration sensor and a velocity sensor. The concentration sensor is an electrical capacitance sensor which has eight electrodes; the velocity sensor is based on cross-correlating two signals derived from a pair of capacitance sensors. A cyclone is employed in this system where the sensors are placed in order to compensate the inhomogeneity of the sensor sensitivity. Experimental results obtained on a pneumatic conveyer circulating coal ash demonstrate that this system is capable of detecting various velocity profiles and solids distributions and providing an absolute mass flow rate of solids within a good agreement with the reference reading from load cells.read more
Citations
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Review of techniques for the mass flow rate measurement of pneumatically conveyed solids
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TL;DR: In this article, a review is presented on the recent measurement techniques of solids' mass flow rate measurement in pneumatic conveying systems on basic principle and configuration of each technique, performances and limitations of these techniques in industrial applications.
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Application of electrical capacitance tomography in particulate process measurement – A review
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Image reconstruction technique of electrical capacitance tomography for low-contrast dielectrics using Calderon's method
Zhang Cao,Lijun Xu,Huaxiang Wang +2 more
TL;DR: In this article, Calderon's method was introduced to electrical capacitance tomography for low-contrast dielectrics, and the image reconstruction process was fast and resulted in images of high quality.
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The spatial filtering method for solid particle velocity measurement based on an electrostatic sensor
TL;DR: In this paper, the relationship between solid particles mean velocity in a pneumatic pipeline and the power spectrum of the output signal of an electrostatic sensor was mathematically modeled and the effects of the length of the sensor, the thickness of the dielectric pipe and its length on the spatial filtering characteristics of sensor were also investigated using the finite element method.
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Acoustic Analysis of Particle–Wall Interaction and Detection of Particle Mass Flow Rate in Vertical Pneumatic Conveying
TL;DR: In this article, a passive acoustic emission (AE) monitoring technique has been established for analyzing particle-wall collision and friction separately in pneumatic conveying pipe, using power spectrum density analysis.
References
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Journal ArticleDOI
Image reconstruction algorithms for electrical capacitance tomography
Wuqiang Yang,Lihui Peng +1 more
TL;DR: In this article, a review of existing image reconstruction algorithms for electrical capacitance tomography (ECT) is presented, including linear back-projection, singular value decomposition, Tikhonov regularization, Newton-Raphson, steepest descent method, Landweber iteration, conjugate gradient method, algebraic reconstruction techniques, simultaneous iterative reconstruction techniques and model-based reconstruction.
Journal ArticleDOI
Mass flow measurement of bulk solids in pneumatic pipelines
TL;DR: A detailed and comprehensive review of the techniques and the current state of knowledge and experience can be found in this article, where the techniques are classified under three main categories: direct measurement of mass flow rates, measurement of volumetric concentrations of solids and measurement of solid velocity.
Book
Cross Correlation Flowmeters, Their Design and Application
M. S. Beck,A. Plaskowski +1 more
TL;DR: This book provides a comprehensive review of the theory and practice of cross correlation flowmetering, and is aimed at three potential audiences: the graduate student in engineering or science who requires an introduction to the relevant signal processing theory; the advanced research and development engineer who requires the Theory and its practical implementation in considerable depth; and the industrial instrument engineer who is interested in the practical aspects of transducers and installation features for specific applications.
Journal ArticleDOI
Optimization of an iterative image reconstruction algorithm for electrical capacitance tomography
Shu-Qing Liu,L Fu,Wuqiang Yang +2 more
TL;DR: In this article, a method to determine the optimal step length for an iterative algorithm is proposed for electrical capacitance tomography, and the efficiency of the method has been demonstrated experimentally.
Journal ArticleDOI
Prior-online iteration for image reconstruction with electrical capacitance tomography
TL;DR: In this article, a linear back-projection (LBP) based image reconstruction algorithm for electrical capacitance tomography (ECT) was proposed, which can produce similar quality images to the Landweber iteration algorithm but at the same speed as the LBP.
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