电阻层析成像系统的硬件设计
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摘要
电阻层析成像是利用多相介质具有不同的电导率,通过传感器测得数据,运用适当的算法重建电导率分布的一种过程层析成像技术。针对现有的成像技术存在的成本高、响应速度慢、不能测量导体的问题,设计了一种新型高精度电阻层析成像系统。硬件部分主要设计了DDS信号产生电路、电流源产生电路、微弱电压信号接收与调理电路、RS485通讯以及STM32F407和CPLD最小系统电路。实际实验搭建了固液两相流测量装置,结果表明该系统成像精度高、实时性好。
Electrical resistance tomography utilizes the multi-phase medium having a different conductivity,obtains the measurement data by the sensor,and then uses appropriate imaging algorithms to reconstruct the conductivity distribution,thereby obtaining the distribution of each phase. A new type of high-precision resistive tomography system was designed for the existing imaging technology,which has high cost,slow response and cannot measure conductor. The hardware part mainly designed the DDS signal generation circuit,current source generation circuit,weak voltage signal receiving and conditioning circuit,RS485 communication and STM32 F407 and CPLD minimum system circuit. The solid liquid two-phase flow measurement device was built in the actual experiment,and the results show that the system has high accuracy and good real-time performance.
Electrical resistance tomography utilizes the multi-phase medium having a different conductivity,obtains the measurement data by the sensor,and then uses appropriate imaging algorithms to reconstruct the conductivity distribution,thereby obtaining the distribution of each phase. A new type of high-precision resistive tomography system was designed for the existing imaging technology,which has high cost,slow response and cannot measure conductor. The hardware part mainly designed the DDS signal generation circuit,current source generation circuit,weak voltage signal receiving and conditioning circuit,RS485 communication and STM32 F407 and CPLD minimum system circuit. The solid liquid two-phase flow measurement device was built in the actual experiment,and the results show that the system has high accuracy and good real-time performance.
引文
[1]郭康.三维电阻层析成像(ERT)硬件系统设计[D].沈阳:东北大学,2014.
[2]电阻层析成像(ERT)技术及其在两相流检测中的应用[D].西安:西安电子科技大学,2012.
[3]杨道业,许传龙,周宾,等.基于PCI总线的小口径高压力电容层析成像系统[J].仪器仪表学报,2007,28(8):1399-1404.
[4]杨道业,周宾,许传龙,等.气力输送电容层析成像在线标定方法[J].中国电机工程学报,2010,30(14):31-35.
[5]李小科.生物阻抗电磁层析成像系统研究[D].天津:天津大学,2012.
[6]孙犇渊.油水两相流的双模层析成像系统[D].天津:天津大学,2013.
[7]杨道业,徐锌锋,李鹏.双阵列式电容传感器特性研究[J].传感器技术学报,2014,27(10):1336-1342.
[8]黄芳.电容层析成像系统的设计及其应用[D].杭州:浙江工业大学,2010.
[9]李涛.基于ARM的嵌入式电阻层析成像测量系统研究[D].北京:中国石油大学,2011.
[10]刘亚.基于内阵列电极双模态层析成像系统研究[D].天津:天津大学,2012.
[2]电阻层析成像(ERT)技术及其在两相流检测中的应用[D].西安:西安电子科技大学,2012.
[3]杨道业,许传龙,周宾,等.基于PCI总线的小口径高压力电容层析成像系统[J].仪器仪表学报,2007,28(8):1399-1404.
[4]杨道业,周宾,许传龙,等.气力输送电容层析成像在线标定方法[J].中国电机工程学报,2010,30(14):31-35.
[5]李小科.生物阻抗电磁层析成像系统研究[D].天津:天津大学,2012.
[6]孙犇渊.油水两相流的双模层析成像系统[D].天津:天津大学,2013.
[7]杨道业,徐锌锋,李鹏.双阵列式电容传感器特性研究[J].传感器技术学报,2014,27(10):1336-1342.
[8]黄芳.电容层析成像系统的设计及其应用[D].杭州:浙江工业大学,2010.
[9]李涛.基于ARM的嵌入式电阻层析成像测量系统研究[D].北京:中国石油大学,2011.
[10]刘亚.基于内阵列电极双模态层析成像系统研究[D].天津:天津大学,2012.