Measurement circuits and image reconstruction techniques of electrical resistance tomography system for two-phase flow measurement

刘铁军 王保良 黄志尧 李海青

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Measurement circuits and image reconstruction techniques of electrical resistance tomography system for two-phase flow measurement

更新时间：2025-12-10

- Measurement circuits and image reconstruction techniques of electrical resistance tomography system for two-phase flow measurement
- CIESC Journal Issue 4, (2007)
- 作者机构：
  
  1. 浙江大学控制科学与工程系工业控制技术国家重点实验室
  2. 中国计量学院计量技术与工程分院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 April 2007，
  
  Published：05 April 2007
- 稿件说明：
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刘铁军王保良黄志尧李海青. Measurement circuits and image reconstruction techniques of electrical resistance tomography system for two-phase flow measurement[J]. CIESC Journal, 2007, (4).
DOI：

刘铁军王保良黄志尧李海青. Measurement circuits and image reconstruction techniques of electrical resistance tomography system for two-phase flow measurement[J]. CIESC Journal, 2007, (4). DOI：

摘要

提出一种用于两相流测量的高速电阻层析成像（electrical resistance tomography，ERT）系统。该系统采用双极性脉冲电流源为激励电极对提供激励信号，避免了直流激励造成的电极极化效应，同时简化了滤波电路的设计，相对于常规的交流激励ERT系统显著提高了数据采集速度。针对成像速度较快但成像质量差的线性反投影算法（linear back projection

LBP），采用离线预迭代技术对其进行改进，提出一种改进型线性反投影算法（modified LBP

MLBP），可高速重建较好质量的ERT图像。数值仿真和采用实际测量数据重建图像的结果表明，基于高速数据采集技术和改进的图像重建算法的高速ERT系统可实现两相流实时在线测量。

Abstract

A high speed electrical resistance tomography (ERT) system was developed

in which the electrodes were excited with a bi-directional pulse current source. The main advantages of this new design included absence of polarization effect at electrodes and high speed data acquisition due to the simplified filters design. Based on the linear back projection (LBP) image reconstruction algorithm

a modified LBP(MLBP) method was developed for this ERT system. By adopting an offline iteration technique and incorporating it with the LBP

the MLBP could reconstruct images of better quality than the LBP with similar image reconstruction speed. Experimental results showed that the new ERT system had the advantages of high image reconstruction speed and good image quality. It could implement realtime measurement of two phase flow.

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