摘要随着科学技术的发展以及人民生活质量的提高,液位控制系统逐渐成为人民生活以及工业生产过程中不可或缺的部分。液位过低会使得液体供应不足、烧坏容器,引起安全隐患,液位过高则会溢出,因此液位控制是工业控制过程中一个重要的方面。 39764
本文主要研究双容水箱液位控制系统,采用PID算法对水箱液位进行精度较高的控制,它在食品加工、溶液过滤、化工生产等方面均有着广泛应用。在本设计中充分利用单片机技术,MCGS技术,计算机控制技术,通讯技术和自动控制技术,以实现对水箱液位的串级控制。
首先,对被控对象的模型进行分析,设计出整体框架及功能实现方案。其次,根据被控对象模型和被控过程设计串级控制系统,设计并组建单片机最小控制系统,A/D和D/A模块,通讯模块以及键盘显示部分。然后,利用proteus软件对水箱液位控制系统的下位机部分进行功能仿真。最后,通过MCGS组态软件实现对液位控制系统上位机部分的仿真以及监测功能。
毕业论文关键词: 双容水箱 液位控制 单片机 PID算法
Abstract
With the development of science and technology, as well as the improvement of people’s quality of life, the system of water level control has been an indispensable part in people’s daily life and in the process of industry production. It will lead to the lack of liquid supply and destroy the container if the level is too low. And if the level is too high, the liquid would flow over.
This text mainly study the double tank liquid level control system, which uses PID to control the level accuarately. It has been widely used in drinking, food processing,filtering solution, chemical production and so on. In this design, it makes full use of the technology of controller, MCGS, computer, communication and automation so as to achieve the liquid level cascade control.
Firstly, make an analysis on the model of the controlled object and design a overall framework and the solution to achieve the function. Then, design and construct the minimum system control of the controller, A/D module, D/A module,communication module,the keyboard part and the display part according to the controlled model and controlled process design of cascade control system. Besides, analyse the overall performance of the control system by the simulation of proteus. Lastly, detect and monitor the system of level control by the simulation of MCGS .
Keywords: double tank,liquid level control, controller system, PID control
目录
摘 要 I
Abstract II
1 绪论 1
1.1 研究背景与意义 1
1.2 国内外发展现状 1
1.2.1 国外发展现状 1
1.2.2 国内发展现状 2
1.3 本设计的主要任务 2
2 系统设计方案分析论证 3
2.1 系统整体功能介绍 3
2.2 已有控制方案的比较 3
2.2.1 液位的检测方案比较 3
2.2.2 液位的控制方案比较 4
2.3 双容水箱液位控制系统模型 5
2.3.1 系统组成 5
2.3.2 系统原理 6
3 下位机硬件设计 7
3.1 下位机硬件结构设计方案 7
3.2 单片机的选型及功能介绍 8
3.2.1 单片机的选型 8
3.2.2 单片机的内部资源 8 单片机和MCGS的双容水箱液位控制系统设计+电路图+程序:http://www.751com.cn/zidonghua/lunwen_40430.html