【作者】 尹冬梅；

【导师】 鲍鸿；

【作者基本信息】 广东工业大学 ， 检测技术与自动化装置， 2007， 硕士

【摘要】 随着现代科技的发展，生产自动化程度的不断提高，基于PC的工控机和单片机已经越来越不能满足应用对象的需求。嵌入式微处理器以其强大的功能，更加快的处理速度，逐渐成为嵌入式系统设计的主流。再加上一个运行于嵌入式微处理器上的操作系统，就使其如虎添翼，在社会各个层面各个领域，扮演着重要角色。本文以工业锅炉嵌入式系统为背景，设计开发一套通用的测控系统。课题首先介绍了嵌入式技术。对嵌入式微处理器，特别是ARM各系列微处理器进行了介绍和对比，同时，详细介绍了本设计所选用的ARM9系列AT91RM9200芯片。选择Linux操作系统作为系统的软件平台。其次，本文介绍了嵌入式工业测控系统硬件的设计。系统以基于AT91RM9200处理器最小系统为核心，集成LCD、触摸屏、语音报警、工业以太网、RS—485、A／D、D／A、USB接口、I／O口扩展等模块的硬件电路。最后，详细阐述了此测控系统的远程通信。测控系统为下位机，控制中心以一台PC机为上位机。在软件上，采用MODBUS作为通信协议，它具有简单易实现的优点。在硬件上，根据控制对象的特点和现有条件，采用RS—485总线，它适合于远距离传输。此外，下位机以Linux系统为软件平台，使用C语言进行程序设计；上位机的操作系统为WindowsXP，利用VC++的MSComm控件进行MODBUS协议的串口的程序设计。本课题采用嵌入式技术，实现对工业锅炉及类锅炉系统的控制，其控制的参数有温度、压力、水位和火力等。此外系统还具有LCD显示、触摸屏人机交互、自动报警、通信、采集大量输入信号和输出大量控制信号等功能，具有实时性、稳定性、安全性、可靠性、通用性和可拓展性等特点。更多还原

【Abstract】 With the development of modern science and technology and the unceasingenhancement of production automaticity, industry control computer and One-chipComputer based on PC cannot satisfy the need of object-oriented application.By theformidable function and the the faster processing speed, the embedded microprocessorgradually becomes the mainstream in the embedded system design. Moreover, there isan operating system embedded in the microprocessor, which makes the system evenmore powerful,and makes it play an important role in every field in society.This article designs a set of embedded industry measurement and controlsystem,with the background of industrial boiler.First, the article discusses theembedded technology. The embedded microprocessors,especially the ARMseries,were introduced and compared.However,AT91RM9200,whitch is one of the chips of ARM9 series,is elaborated.Then, the design of embedded industry measurement and control system ispresents. The system takes the smallest system of the AT91RM9200 processor whichis based on ARM9 as a core, and integrates some hardware circuit, such as, the LCD,the touching screen, the pronunciation alarm, the industry ethernet, RS-485, A/D, D/A,the USB connection,the integrated I/O expansion control module and so on.In th end,the paper elaborates the communication of this system. The system isconsidered as the lower computer, and the upper computer is a PC of controlcenter.They select MODBUS protocol as the correspondence agreement.and theprotocol has the advantage of simplicity.In the aspect of hardware,according to thecharacter controller object and the situation,the system adopts RS-485 bus,whitchsuits long-distance communication.Besides,Linux system is the platform of the lowercomputer, and C language is used. The upper computer takes WindowsXP as theplatform,and uses MSComm controls of VC++ programming.The article adopts embedded technology, realizes the control of industrial boilersand devices resembled boiler.It can control the parameters of temperature,pressure,water level etc.Moreover, the system has the function of LCDshow, automatic alarm,communication,collect mass input signals and output masssignals. This system has the ablity of real time,stability, secutity, credibility andexpandability.更多还原