基于PLC的全自动洗衣机的设计毕业论文

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毕业论文

题目基于PLC的全自动洗衣机的设计

姓名学号系（院）班级指导教师职称

20XX年X月XX日

摘要

在现代的社会，全自动洗衣机进入每个家庭，本文介绍了PLC用于全自动洗衣机的控制系统，该设计描述了洗衣机由进水、洗涤、排水、脱水、报警到自动停机的循环过程，并设计相应的系统软件，结合相应的硬件系统，提高控制系统的可靠性.全自动洗衣机应用了可编程控制器，它的功能强、可靠性极强、编程简单、使用方便、体积小。它结合全自动洗衣机控制系统的要求，进行程序的设计，从主要部件的选择、流程的分析、程序思路的产生来完成本次设计任务。从而实现对可编程控制。

此设计主要介绍了全自动洗衣机的工作原理，控制系统的plc造型和资源的配置，控制系统程序设计与调试。根据全自动洗衣机的工作原理，利用可编程控制器实现控制。

关键词：洗衣机；全自动；可编程控制器

ABSTRACT

In the modern time, the Full-automatic washer is entering every family. The article describes the PLC control system ,which is used in fully-auto washing machine ,The design is described how the water washing machine drains away water from water--entering,clearing,dehydration and gives an alarm to the circulation process stopping calculation voluntarily. Have designed the appropriate system software, combined with the appropriate hardware system to improve control system reliability, application of a programmable automatic washing machine controller, Its function is strong,the reliability is high,the plait distance is simple and the usage is convenient.Automatic washing machine control system which combines the requirements for the design process, from the main part of the selection, process analysis, idea generation process to complete this design task. To realize the programmable control.

This design introduces a fully automatic washing machine works, plc control system modeling and resource allocation, control system programming and debugging. According to the working principle of automatic washing machine, using a programmable controller for control.

Keywords: washing machine; automatic; programmable controller

第一章绪论 ???????????????????????7

1.1选题背景意义 ????????????????????????7 1.2 洗衣机的发展历史??????????????????????7 1.3控制系统选择?????????????????????????9

第二章全自动洗衣机控制方案确定?????????????10

2.1总体控制方案确定??????????????????????10 2.1.1 控制系统的比较???????????????????10 2.2洗衣机的PLC控制系统概述???????????????????10 2.3PLC的设计步骤???????????????????11

第三章全自动洗衣机的基本结构??????????????13

3.1全自动洗衣机的原理和构造??????????????????13 3.2电气控制系统的硬件设计 ?????????????????14 3.2.1电动机控制电气元件的选择??????????????14 3.2.2电动机控制线路图?????????????????14 3.3 PLC控制系统硬件部分设计?????????????????14 3.3.1 PLC输入元件选择?????????????????14 3.3.2 PLC输出元件选择?????????????????15 3.3.3 PLC输入输出元件分配?????????????????16 3.3.4 PLC I/O接线图?????????????????17

第四章电气控制系统???????????????????18

4.1控制系统结构??????????????????????18 4.2控制系统原理??????????????????????18 4.3检测电路系统??????????????????????19

第五章主要器件的选择??????????????????21

5.1电动机的选择??????????????????????21 5.2传感器的选择???????????????????????21

5.2.1 水温传感器的选择?????????????????21 5.2.2 水位传感器的选择??????????????????21 5.2.3 衣质传感器的选择????????????????21 5.3可编程控制器外部设计???????????????????22 5.3.1 可编程控制器的选择????????????22 5.3.2 外围接线图???????????????23

第六章软件设计?????????????????????24

6.1系统控制顺序功能图设计?????????????????24 6.2.全自动洗衣机的控制要求????????????????24 6.3控制系统顺序功能图????????????????????25 6.4控制系统的梯形图设计?????????????????26

第七章课程设计总结???????????????????28 参考文献 ????????????????????????29 致谢 ??????????????????????????30