FPGA+LabVIEW气液两相流电阻率测量系统设计
毕业论文关键词： 两相流 电阻率测量系统 FPGA LabVIEW
Title Gas-liquid two-phase flow resistivity measurementsystem design-the software partAbstract Abstract Abstract AbstractT he two-phase flow is one of nature's most widespread flow pattern playsan important role in industrial production and daily life . However, thetwo-phase flow system is a complex nonlinear dynamic system , and whiteinterface effect and the relative velocity detection difficult .Real-timeand accurate measurement of two-phase flow parameters become the field ofengineering and scientific research has not yet been an effective solutionto the problem .Many methods have been applied on measuring two 一 phase flow the one withgreat perspective is Electrical Resistance Tomography(ERT) which canobtain the flow characteristic of two-Phase flow by measuring the changeof the conductivity in the sensing field that estbalished by injectingexciting current into measured cross-section.The characteristic of thistechnique is non-intursive,non 一 radiant,visualization and etc.This paper designs a set of FPGA-based ERT resistivity measurement systems and usesthe adjacent current excitation , adjacent four-electrode voltagemeasurement measuring resistance , the use of constant amplitude bipolarcurrent signal as the excitation signal .The work done in this topic are as follows:1 ． summarizes the the ERT technology development process and researchstatus . Understand the resistance tomography system design and operatingprinciple of the function of each module .2. design and implement resistivity measurement system based on FPGA gas-liquid two-phase flow, specially designed for the driver, the programincludes the key debounce modules, DC current, AC current transformationmodule, the electrode switching module, program-controlled amplifiermodule, serial port to sendmodule, AD conversion module. Details of theresistivity measurement system software module design.3. Designed PC software the ERT measurement system based on LabVIEW . Hostcomputer for data collection , and the data is displayed in real time inorder to monitor data
Keywords: The two-phase flow resistivity measurement systemFPGA LabVIEW
目 录
1 绪论 1
1.1 课题的研究背景及意义 1
1.2 ERT 应用系统设计的国内外研究的发展概况 . 3
1.3 课题的研究内容 .. 6
1.4 论文结构 .. 6
2 ERT 系统的硬件结构介绍 . 8
2.1 ERT 系统的原理及组成 . 8
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