【作者】 谭超； 董峰； 王斌斌；

【Author】 Tan Chao1,2,Dong Feng1,2,Wang Binbin1 1.School of Electrical Engineering and Automation,Tianjin University,Tianjin 300072,P.R.China 2.Tianjin Key Laboratory of Process Measurement and Control,Tianjin University,Tianjin 300072,P.R.China

【机构】 天津大学电气与自动化工程学院； 天津市过程检测与控制重点实验室；

【摘要】 电阻层析成像技术(Electrical Resistance Tomography,简称ERT)通过测量敏感场内电导率变化,得到不透明容器内的对象特性,并通过成像算法再现测量对象的截面图象,具有非侵入、无辐射、可视化等特点。多截面ERT系统在工业过程测量与监测中有广泛的应用前景,然而它的动态实时性能往往局限了其在工业现场的应用范围。为此,本论文提出了基于数字I/O卡与高速并行A/D转换卡的并行多截面ERT系统的设计方案。该系统通过减少测量信号的切换次数,可实现系统工作速度的大幅提高。更多还原

【Abstract】 Electrical Resistance Tomography(ERT)obtains the characteristic of the measured object in opaque containers by measuring the change of the conductivity in the sensing field that established by injecting exciting current into measured cross-section,and reconstructs the section image through certain reconstruction algorithm.The characteristic of this technique is non-intrusive,non-radiant,visualization and etc.Multi-plane ERT system has great prospective in industrial measurement and monitoring,however,the application is restricted by its real-time performance.In this paper,the scheme of new multi-plane ERT system based on parallel data-acquisition system has been proposed.This new system uses digital I/O card and high speed A/D transition card to decrease the switch time of measured signal and to improve system performance.更多还原