Effects of noise on fluidized bed characteristics measurements by electrical capacitance tomography  

作　　者：Kai Huang Chunlei Pei Shuanghe Meng Wuqiang Yang Hua Li Mao Ye Jinlong Gong 

机构地区：[1]Joint School of National University of Singapore and Tianjin University,International Campus of Tianjin University,Binhai New City,Fuzhou 350207,China [2]Key Laboratory for Green Chemical Technology of Ministry of Education,School of Chemical Engineering and Technology,Collaborative Innovation Center of Chemical Science and Engineering,Tianjin University,Tianjin 300072,China [3]Dalian National Laboratory for Clean Energy and National Engineering Laboratory for MTO,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China [4]Department of Electrical and Electronic Engineering,The University of Manchester,Manchester M139PL,UK [5]Tianjin Normal University,Tianjin 300387,China

出　　处：《Chinese Journal of Chemical Engineering》2025年第3期219-233,共15页中国化学工程学报(英文版)

基　　金：National Key Research and Development Program of China(2021YFA1501302);the National Natural Science Foundation of China(22121004,22122808);the Haihe Laboratory of Sustainable Chemical Transformations and the Program of Introducing Talents of Discipline to Universities(BP0618007)for financial support;supported by the XPLORER PRIZE.

摘　　要：Noise is inevitable in electrical capacitance tomography(ECT)measurements.This paper describes the influence of noise on ECT performance for measuring gasesolids fluidized bed characteristics.The noise distribution is approximated by the Gaussian distribution and added to experimental capacitance data with various intensities.The equivalent signal strength(Ф)that equals the signal-to-noise ratio of packed beds is used to evaluate noise levels.Results show that the Pearson correlation coefficient,which indicates the similarity of solids fraction distributions over pixels,increases with Ф,and reconstructed images are more deteriorated at lower Ф.Nevertheless,relative errors for average solids fraction and bubble size in each frame are less sensitive to noise,attributed to noise compromise caused by the process of pixel values.These findings provide useful guidance for assessing the accuracy of ECT measurements of multiphase flows.

关 键 词：Noise Electrical capacitance tomography Fluidized bed Signal-to-noise ratio MEASUREMENT 

分 类 号：TQ021.1[化学工程]