Characterisation and decoupling of electromagnetic properties in liquid–solid system using high-frequency electromagnetic tomography

IF 6.1 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Measurement Pub Date : 2026-05-05 Epub Date: 2026-03-05 DOI:10.1016/j.measurement.2026.120996

Xun Zou, Kuohai Yu, Yu Li, Saibo She, Xinnan Zheng, Shu Lin, Wuliang Yin

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引用次数: 0

Abstract

In the liquid–solid fluidised system with conductive fluid and magnetic catalysts, the monitoring of electrical conductivity and magnetic permeability is essential to maintain the desired operating conditions. Conventional electromagnetic tomography (EMT) techniques applied to fluidised beds are limited to magnetic phase detection, while conductivity measurements still rely on contact methods or multimodal integration. Therefore, this study presents a non-contact approach for the characterisation and decoupling of electromagnetic properties in solid–liquid systems with a high-frequency EMT sensor. A pre-calibrated vector decomposition method is developed for the simultaneous estimation of conductivity and permeability. The effectiveness of the method is verified through experiments with magnetite saline dispersions in various concentrations, which give average estimation errors of 3.44% and 0.16% for the conductivity and permeability estimation, respectively. In the imaging experiments, a modified Landweber algorithm integrating Nesterov momentum and weight assignment is developed and applied to the reconstruction, contributing to fast convergence and enhanced image quality. Furthermore, distributions of conductive phase and magnetic phase are decoupled through the reconstruction of distinct voltage response components.

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利用高频电磁层析成像技术表征液固系统的电磁特性并进行解耦

在具有导电性流体和磁性催化剂的液固流化系统中，电导率和磁导率的监测对于维持所需的操作条件至关重要。应用于流化床的传统电磁层析成像（EMT）技术仅限于磁相位检测，而电导率测量仍然依赖于接触方法或多模态积分。因此，本研究提出了一种非接触的方法来表征和解耦高频EMT传感器在固液系统中的电磁特性。提出了一种预校正矢量分解方法，用于同时估计电导率和渗透率。通过不同浓度的磁铁矿盐分散体实验验证了该方法的有效性，其电导率和渗透率的平均估计误差分别为3.44%和0.16%。在成像实验中，提出了一种结合Nesterov动量和权值分配的Landweber算法，并将其应用于图像重建，提高了图像的收敛速度和图像质量。此外，通过重构不同的电压响应分量来解耦导电相位和磁相位的分布。

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来源期刊

Measurement 工程技术-工程：综合

CiteScore

10.20

自引率

12.50%

发文量

1589

审稿时长

12.1 months

期刊介绍： Contributions are invited on novel achievements in all fields of measurement and instrumentation science and technology. Authors are encouraged to submit novel material, whose ultimate goal is an advancement in the state of the art of: measurement and metrology fundamentals, sensors, measurement instruments, measurement and estimation techniques, measurement data processing and fusion algorithms, evaluation procedures and methodologies for plants and industrial processes, performance analysis of systems, processes and algorithms, mathematical models for measurement-oriented purposes, distributed measurement systems in a connected world.