【作者】 曹阳； 董峰； 张福生；

【Author】 CAO Yang,DONG Feng,ZHANG Fusheng Tianjin Key Laboratory of Process Measurement and Control,School of Electrical Engineering and Automation,Tianjin University Tianjin 300072,P.R.China

【机构】 天津市过程检测与控制重点实验室天津大学电气与自动化工程学院；

【摘要】 多相流动状态广泛存在于自然界和人类生产活动中.多相流参数的准确检测和多相流过程的有效监控,对保障生产设备安全运行、提高生产效率具有重要的意义.基于电学敏感原理的电阻层析成像技术具有无扰动、无辐射、可视化等特点,在多相流检测中有着广泛的应用前景.为满足多相流测试现场条件下的应用,设计了应用PXI模块化仪器的多工作模式智能电阻层析成像系统.该系统通过采用不同的工作模式实现流体介质分布的图像重建和相关流动信息的提取.实验测试表明,系统的数据采集速度在双截面同时工作时,16电极模式为625幅/秒,8电极模式为1562幅/秒,4电极模式为3125幅/秒,系统的实时性能基本满足实际测试要求.通过多相流动态模拟实验测试,对系统所获取的流动截面测试数据的提取,可较清晰的获取不同流型条件下的流动特征.更多还原

【Abstract】 Multi-phase flows are commonly encountered in the industry processes.It is very significant to monitor and test multi-phase flow.Electrical Resistance Tomography(ERT) technique has great prospective in industrial measurement and monitoring with merits of non-intrusive,non-radiant,visualization and etc.However,the application of this technique is restricted by its real-time performance.In this paper,the scheme of the intelligent ERT system based on PXI modular instruments has been proposed.The system can realize the image construction and flow information extracted with the method of multi-working mode.The result shows that,when the intelligent ERT system is working in dual-plane,the speed of each plane is 625 frames/s with 16 electrodes working mode,1562frames/s with 8 electrodes working mode,and 3125 frames/s with 4 electrodes working mode.The real-time performance of the system satisfies the test requirements.Through the test of multi-flow dynamic simulated experiment,the characteristic value which is extracted from the measured data of each cross section can acquire the flow features distinctly of different flow patterns.更多还原