文档介绍：学号_
密级___________________
武汉大学东湖分校本科毕业论文
基于PLC的材料分拣装置设计
院(系) 名称: 工学院
专业名称:电气工程及其自动化
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二○一○年五月
郑重声明
本人呈交的学位论文,是在导师的指导下,独立进行研究工作所取得的成果,所有数据、图片资料真实可靠。尽我所知,除文中已经注明引用的内容外,本学位论文的研究成果不包含他人享有著作权的内容。对本论文所涉及的研究工作做出贡献的其他个人和集体,均已在文中以明确的方式标明。本学位论文的知识产权归属于培养单位。
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摘要
随着科学技术的飞速发展,现代工业控制系统越来越复杂,传统控制科学面临着新的挑战。PLC以其体积小、功能齐全、价格低廉和可靠性高等方面具有独特的优点,在各个领域获得了广泛应用。PLC的使用大大提高了控制系统的可靠性和自控程度,为企业提供了更可靠的生产保障。如何在PLC自动控制领域充分发挥PLC的优势,是目前自动控制学科的重要课题之一。
本课题正是在这样的背景下,围绕基于PLC的材料分拣装置设计展开研究。论文首先叙述了PLC的材料分拣装置的发展背景、现状和发展方向。然后,说明了PLC自动分拣控制系统工作原理和与传统继电器的区别。
本文详细叙述了一种基于PLC的材料分拣装置设计及自动控制编程,以及怎样通过PLC程序设计来实现材料分拣和自动控制。其电路结构简单,投资少(可利用原有设施改造),分拣系统不仅自动化程度高,还具有在线修改功能,灵活性强,系统具有数据采集准确、可靠性高及系统成本低等优点。
关键词:PLC;材料分拣;自动控制;传感器
ABSTRACT
With the rapid development of science and technology, modern industrial control systems e plicated, the traditional control of science is facing new challenges. PLC with its small size, full-featured, low cost and high reliability has unique advantages, in various fields has been applied widely. The use of PLC control system greatly improved the reliability and automation level, providing a more reliable production and protection. How to give full play to PLC automatic control advantages, is an important subject in one of the automatic control.
This topic is in this context, the surrounding material sorting device based on PLC design of a study. Paper first describes the material sorting device PLC backs the development, current status and future directions. Then, show the work of PLC control system for automatic sorting principle and the difference between traditional relays.
This paper describes the material sorting based on PLC control device design and programming, PLC programming and how to achieve by material sorting and automatic control. The circuit structure is simple, less investment (transformation of existing facilities can be used), sorting system is not only a high degree of automation, but also changes with the online features, flexib