A New Truncation Strategy for Regularized D-Bar Method Used for ERT Image Reconstruction

Guo, Qi; Wang, Chao; Pang, Ran; Ye, Jiamin

doi:10.1109/jsen.2022.3158748

Cited by 4 publications

(2 citation statements)

References 33 publications

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“…The Calderon algorithm is often used to solve low-contrast problems, and its overall imaging quality is not as good as the D-bar algorithm. , There has been much research on the D-bar algorithm in the field of ET. It has been proved that the D-bar algorithm can reconstruct the true value of the electrical parameters (conductivity/permittivity/permeability) of the distribution with high quality. − , Therefore, to obtain a more accurate holdup distribution image, the D-bar algorithm is used to reconstruct the true values of conductivity and permeability in this paper. First, Dirichlet-to-Neumann (DN) maps are constructed from the boundary measurement data obtained by ERT and TMR-EMT.…”

Section: Theory and Methodsmentioning

confidence: 99%

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Measurement of Three-Phase Holdup Distribution in Gas–Liquid–Solid Fluidized Bed Based on ERT/TMR-EMT

Wang,

Zhang,

Guo

et al. 2023

Ind. Eng. Chem. Res.

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The measurement of three-phase holdup distributions in the gas−liquid−solid fluidized bed has guiding significance for the fluidized bed's characterization, design, and optimization. Aimed at the measurement of three-phase holdup distribution simultaneously, an image reconstruction method for electrical resistance tomography and electromagnetic tomography based on tunnel magnetoresistance (ERT/TMR-EMT) dual-modality system is proposed. The distributions of equivalent conductivity and equivalent permeability are reconstructed by the D-bar algorithm based on ERT and TMR-EMT, respectively. Then, the three-phase holdup distribution is reconstructed through equivalent media theory. From the results of the reconstructed image and threephase average holdup in simulation, the holdup variations of the gas, liquid, and solid are principally consistent with the phantom sets. From the measurement results of the dynamic experiments, clusters with high solid holdup and bubbles with high gas holdup can be accurately reflected and the variation of three-phase holdup distribution and average holdup can correctly reflect changes in experimental states in the fluidized bed.

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Section: Theory and Methodsmentioning

confidence: 99%

“…h i b i t e d . ability) of the distribution with high quality [32][33][34]41. Therefore, to obtain a more accurate holdup distribution image, the D-bar algorithm is used to reconstruct the true values of conductivity and permeability in this paper.…”

mentioning

confidence: 99%