《基于PLC的自动分拣系统设计》-毕业论文.doc
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XXXXXX学院
毕业设计
题 目： 基于PLC的自动分拣系统设计
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摘 要
PLC控制是目前工业上最常用的自动化控制方法，由于其控制方便，能够承受恶劣的环境，因此，在工业上优于单片机的控制。PLC将传统的继电器控制技术、计算机技术和通信技术融为一体，专门为工业控制而设计，具有功能强、通用灵活、可靠性高、环境适应性强、编程简单、使用方便以及体积小、重量轻、功耗低等一系列优点,因此在工业上的应用越来越广泛。
本文主要讲述PLC在材料分拣系统中的应用，利用可编程控制器( PLC) ，设计成本低、效率高的材料自动分拣装置。以PLC 为主控制器，结合气动装置、传感技术、位置控制等技术，现场控制产品的自动分拣。 系统具有自动化程度高、运行稳定、精度高、易控制的特点，可根据不同对象，稍加修改本系统即可实现要求。
关键词： PLC，分拣装置，变频器，传感器
目 录
封面···········································I
摘要··········································II
目录·········································III
绪论···········································1
第1章 材料分拣装置结构及总体设计··············2
1.1 材料分拣装置工作过程概述···························2
1.2 系统的技术指标·····································3
1.3 系统的设计要求·····································3
1.3.1 功能要求·········································3
1.3.2 系统的控制要求 ································3
第2章 控制系统的硬件设计······················4
2.1 系统的硬件结构·····································4
2.2 系统关键技术·······································4
2.2.1确定I/ O点数····································4
2.2.2 PLC的选择·······································4
2.2.3 PLC的I/O分配···································4
2.2.4 PLC输入输出接线端子图···························5
2.3检测元件与执行装置的选择····························6
2.3.1 光电式旋转编码器·································6
2.3.2 电感式接近开关 ································8
2.3.3 光纤传感器·······································9
2.3.4变频器···········································10
2.3.5电动机···········································13
2.3.6 磁控开关·········································14
2.3.7光电开关··········································16
2.3.8电磁阀及气缸······································17
第3章 控制系统的软件设计······················18
3.1 控制系统流程图设计································18
3.2 控制系统程序设计 ·······························18
第4章 控制系统的调试·································23
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