Velocity Distribution Measurement Using Pixel-Pixel Cross Correlation of Electrical Tomography

• 作者: DENGXiang PENGLihui YAODanya ZHANGBaofen
• 来源期刊: 电子学报(英文版)
• 学科: 工学
• 关键词: 电层析X射线摄影术 像素交叉相关 速度测量 两相流动
• 年，卷（期）: 2004,（3）
• 页码范围: 548-551
• 页数: 4页
• 分类号: TB879
• 语种: 中文

摘要

Electrical tomography (ET) provides a novel means of visualizing the internal behavior of twophase flow in industrial process. Using a dual-sensingplane Electrical resistance tomography (ERT) or Electrical capacitance tomography (ECT) system, the raw data of two different section images can be acquired synchronously and the two images reflecting the inner medium distribution respectively can also be reconstructed by using imaging algorithm. Further, the analysis of pixel-pixel cross correlation is able to be setup and the measurement of velocity distribution of two-phase flow could be achieved. The principle is described in the paper. The FFT algorithm for gray value computation and cross correlation function calculation is also introduced. Some experimental results of velocity distribution measurement using pixelpixel cross correlation in vertical slug flow are presented.