基于PLC和变频器的物料搅拌控制系统设计.doc

LANZHOU UNIVERSITY OF TECHNOLOGY 毕业设计(论文) 题 目 基于PLC和变频器的物料搅拌系统设计 学生姓名 陈建龙 学 号 专业班级 电气工程及其自动化（2）班 指导教师 杨巧玲 学 院 电信工程学院 答辩日期  摘要 随着近代工业技术的发展，物料混合技术技术也得到了迅速的发展，它广泛应用与化学工艺与生产中，但在应用中，传统的物料搅拌工艺也存在严重的问题和产能的制约。PLC是以计算机技术为核心的通用自动控制装置，也可以说它是一种用程序来改变控制功能的计算机。随着微处理器、计算机和通信技术的飞速发展，可编程序控制器PLC已在工业控制中得到广泛应用，而且所占比重在迅速的上升。PLC主要由CPU模块、输入模块、输出模块和编程装置组成。它应用于工业混合搅拌设备，使得搅拌过程实现了自动化控制、并且提升了搅拌设备工作的稳定性，为搅拌机械顺利、有序、准确的工作创造了有力的保障。本文介绍的物料搅拌系统以PLC作为控制核心，结合变频器等完成物料搅拌的自动控制系统，能够较好的满足搅拌系统的要求。 关键词：可编程控制器PLC；变频器；电动调节阀；物料搅拌系统；PID控制；电动调节阀 Abstract With the development of modern industrial technology, material mixing technology has been rapid development, it is widely used and the chemical technology and production, but in the application, the traditional material mixing process also exists serious problems and capacity constraints。Computer technology as the core of PLC in the general automatic control equipment, it is a kind of program to change control function of the computer. As microprocessors, computer and communication technology, the rapid development of PLC programmable controller has widely applied in industrial control, and the proportion of the rapid rise in. PLC mainly consists of CPU module, input and output module and programming module device. It is applied in industry, mixing equipment mixing process realized automation control, and improved the stability, agitate equipment work for the mixing machine smoothly, orderly, accurate working creates powerful guarantee. In this paper, the material mixing system with PLC as control core, combined with frequency converter, etc material stirring of the automatic control system. Key words: PLC programmable controller；frequency converter； material mixing system；PID control; Electric control valve 目 录 第一章 绪论