电阻层析成像激励电极加权研究

电阻层析成像（ERT）技术逐步进入到了工业应用研究阶段，根据物体内部介质的电阻率（或电导率）的不同，通过对物体表面电流、电压的施加、测量来获知物体内部电导率的分布，进而重建出反应物体内部结构的图像，与传统的过程参数技术相比，具有非侵入、无辐射、成本低等许多优点。计算发现相邻激励模式电流密度过于集中，气泡出现在激励附近时，场域电流密度变化很大，提出对于泡状流气泡出现在气泡附近进行主动检测，获得的数据用于电极主动加权，加大激励电极权值和减少激励电极权值可分别对边界处成像和对中心处成像有利。

Research on the Weight Disposal of Electrical ResistanceTomography Magnetism Boundary Condition

Electrical resistance tomography technology has been developed rapidly and now has come to the stage of industrial applications It reconstructs the internal conductivity (or impedance) profile of an object from boundary measurements of voltages and the corresponding current fluxes ERT has several advantages over other traditional process parameter measurement techniques,such as its non invasion,low xost,lack of radiation,visualization The object of this thesis is gas/liquid two phase flow At present,the common model in Electrical Resistance Tomography (ERT) is adjacent data collection method Current density is very high near the inspiring electrode When a gas bubble comes out near the inspiring electtrode,current density varies greatly A method is presented,if a gas bubble comes in the area near an electrode,the information is used in the weight disposal Big weight or small weight is good to the boundary and center area in image reconstruction