基于单片机的压力液位控制系统的设计研究.doc

文档介绍：基于单片机的压力/液位控制系统的设计研究
摘要
本文介绍了国内外过程控制系统研究的发展过程、进展状况以及提高自动化
程度的若干新技术:研究了过程控制实验装置TKGK—l的内在结构、控制对象以
及主要特点;选取过程控制中的典型参数液位/压力为控制对象,设计了以Pc
机为上位机、以89(;51单片机为下位机,并辅之以传感器、变频器阻及相关接口
部件的二级集散控制系统;着重介绍了基于TLC2543单片机的数据采集与处理系
统和基于Rs一232C通信标准的数据通信系统程序模块的设计思路、工作过程;
介绍了提高系统抗干扰能力的看门狗电路。
基于单片机的TKGK一1过程控制系统的硬件和软件都采用模块化设计,硬件
模块便于生产和维护;软件模块便于修改和升级。文中的数据采集与处理程序、
上位机与下位机之间的通信程序都使用执行效率较高的汇编语言来完成,上位机
的人机交互界面与数据输出程序采用高级语言vB来开发。
通过本文的研究,总结出了基于单片机过程控制系统的优势:体积小,实际
应用系统简单实用,成本低,效益好;具有较高的性能价格比;系统不易受到干
扰,可靠性高。本文为基于单片机的过程控制系统应用到实际生产过程做了有益
的尝试,为提高我提供了有参考价值的设计思路。
关键词:过程控制单片机数据采集串行通信程序设计
Research of

Pressure/Liquid
Which iS Based
-11Oil

Position Control
Single ChiD

System
Abstract
This paper introduces the development of process control system,the
nowadays
situation and several
mew
techniques。which
are
good for the
improvement of automatization,in both China and other countries.
This paper has done many research,including:the immanent structure,
controliing objects
and the main
features
of TKGf(_一I Process
Control
System;choosing the typical
parameter--hydraulic
position/pressure
as
the main object,we have designed
a
Distributed Control System,which is
composed by PC,cal2ed puter,AT89C51,calied hypogyny single
chip,and other assistant
equipments,such
as
sensor,transducer and
related the emphasis
on
the introduction
of data collecting and disposing system,which is based
on
the single chip
TLC2543,and the data traffic is based
on
munication
standard

introduction
contains
the
designing idea
and
working process of the formality module the Watch Dog
circuit which ie used to improve the
anti--jamming
ability of the system.
The hardware and software of the TKGI卜一l Process Control
is based
on
the single chip,both
use
the modularize hardware
module is easy
to produce and
maintenance;the software mo