安徽某大学电气工程及其自动化毕业论文

XXXX毕业设计

系别：机械与电子工程系 专业：电气工程及其自动化 班级： XXXX 姓名：XXX 学号：XXXXXXXX 指导老师：XXX

2013年5月

基于PLC液体药品成分混合的控制设计

作 者 指导教师

XXX XXX

摘要：可编程序控制器（PLC）是以微处理器为基础的通用工业控制装置，是一种数字运算操作的电子系统。它采用可编程序的存储器，用来在其内部存储执行逻辑运算、顺序控制、定时、计算和算术运算等操作指令，并通过数字式、模拟式的输入和输出，广泛应用在各种机械设备和生产过程的自动控制系统中。本课题是使用三菱PLC控制两种不同液体的混合。根据生产需求，通过液面传感器控制生产对两种液体需求的量，由定时器对搅拌机进行定时控制，从而使液体进行充分混合，最后将混合液体排出容器罐，同时实现生产的循环。

关键词：可编程序控制器 自动控制 液面传感器

The mixed control design based on PLC liquid

pharmaceutical composition

Abstract: Programmable Logic Controller (PLC) is a microprocessor-based general-purpose

industrial control device, a digital electronic computers operating system. It uses a programmable memory used in its internal storage for performing logic operations, sequential control, timing, calculation and arithmetic operation instruction, and is widely used in various mechanical devices through digital and analog inputs and outputs, and the automatic control system of the production process. This topic is Mitsubishi PLC control two different liquid mixture. Controlled by the liquid level sensor according to the produce requirements, the amount of the production of two liquid are wanted by the timer timing control mixer, so that the liquid is thoroughly mixed, the mixed liquid discharge container tank, while achieving a production cycle.

Keywords: Programmable Logic Controller automatic control liquid level senor

目 录

摘要 .................................................................................................................................................. 1 Abstract ............................................................................................................................................. 2 1 PLC简介 .................................................................................................................................... 5

1.1 PLC的发展史 .................................................................................................................... 5 1.2 PLC的结构 ..................................................................................................................... 5 1.3 PLC的工作原理 ................................................................................................................ 6 1.4 PLC的应用领域 ................................................................................................................ 6 1.5 PLC的发展趋势 ................................................................................................................ 7 2 总体设计....................................................................................................................................... 8

2.1 方案设计 ............................................................................................................................ 9 2.2 液体混合装置的示意图 .................................................................................................. 10 2.3 方案结构框图 .................................................................................................................. 10 2.4 设计要求 .......................................................................................................................... 11 3 硬件设计..................................................................................................................................... 11

3.1 硬件选型 .......................................................................................................................... 11

3.1.1 PLC机型选择 .................................................................................................... 11 3.1.2 搅拌机的选择 ....................................................................................................... 13 3.1.3 液面传感器 ........................................................................................................... 14 3.1.4 电磁阀选择 ........................................................................................................... 15 3.2 外部接线图 ...................................................................................................................... 16

3.2.1 I/O端口分配表 ..................................................................................................... 16 3.2.2 硬件接线图 ......................................................................................................... 16

4 程序设计..................................................................................................................................... 17

4.1 流程图 .............................................................................................................................. 17 4.2 梯形图 .............................................................................................................................. 18 5 系统仿真..................................................................................................................................... 19 总 结................................................... …… 此处隐藏：7991字，全部文档内容请下载后查看。喜欢就下载吧 ……