基于嵌入式ARM处理器的电阻率测量系统设计
毕业论文关 键 词： 电阻层析成像、数据采集、串口通信、流程图
Title Resistivity measurement system design based on embeddedARM processor
ABSTRACT Resistance tomography (ERT) is an electrical tomography (PT) technology,visualization, non-invasive, no radiation, high speed and low cost,two-phase detection with a wide range of industrial applicationsprospects.After nearly two decades of development, has gradually shiftedfrom the stage of laboratory research and practical industrial fieldapplication stage, a higher demand in the industrial field applications,testing equipment, low-power, portable, intelligent, smallandintegration.In view of the external device embedded ARM systems, controlability, this project was designed and implemented based on the embeddedgas-liquid two-phase flow resistivity measurement system on the basis ofthe special gas-liquid two-phase flow measurement circuit,Control of thecore module design is based on the detection of embedded systems and controlsoftware designed to detect, measure the resistivity of the gas-liquidtwo-phase flow, provide the raw data and technical support for electricalresistance tomography study.1 .Summarizes the Resistance Tomography (ERT) and research status of thedevelopment process, to understand the principles of ERT.2 .Designed a two-phase flow resistivity measurement system's overall plan,and the upper plate S3C2440A chip hardware mastering each module pinassignment, drawing module interface circuit.3 .ADS1.2 development environment in the development of control code flowchart drawing program operation, the ultimate load compiled program.
Key Words: Resistance tomography, data acquisition, serialcommunication, flow charts
目 录
1 绪论 1
1.1 课题研究的背景及意义 .. 1
1.2 电阻层析成像及电阻率测量技术的发展历程及前景 . 2
1.3 嵌入式 ARM 处理器的简介及优势 . 4
1.4 本课题研究的主要内容 . 7
1.5 论文结构 . 8
2 电阻率测量系统的原理及总体设计方案 9
2.1 电阻率测量的基本原理 . 9
2.2 电阻率测量系统的总体设计方案 . 9
3 电阻率测量系统的主控模块硬件设计 .. 11
3.1 电源模块设计 ... 11
3.2 串行通信接口设计 ... 11
3.3 底层板控制模块设计 ... 12
3.4 控制管脚的分配 ... 17
4 电阻率测量系统的软件设计 .. 18
4.1 开发环境介绍及 AXD 调试介绍 ... 18
4.2 GPIO 接口的介绍和串口通信原理及程序编写 .. 21
4.3 直流转交流模块软件设计 ... 24
4.4 电极的激励与测量切换软件设计 ... 25
4.5 程控放大模块软件设计 ... 26