自动售货机-毕业设计论文.doc-2

I本科毕业设计（论文）题目基于PLC的自动售货机的设计学院电气与自动化工程学院年级专业电气工程及其自动化班级学号学生姓名指导教师职称论文提交日期II基于PLC的自动售货机的设计摘要随着现在城市的发展规模越来越大，在很多公共场所都放置了自动售货机，方便快捷的满足了人们的需求，为人们在对简单物品采购的时候提供了一种便利。传统的一些自动售货机大多采用的是单片机控制方式，抗干扰的能力相对较差，系统硬件设计比较复杂，系统的稳定性以及可靠性很难得到保证，维修和维护困难。本次设计一套基于PLC的自动售货机的控制系统，简单阐述了自动售货机的发展前景与背景，详细分析其主要功能和特点，提出了总的设计方案；此次设计基于WinCC和西门子S7-300PLC，主要是对自动售货机的硬件方面和软件方面进行仿真设计，采用了顺序控制的程序设计思路，设计了系统的控制程序，包括投币程序、购买程序和退币程序。关键词：售货机PLC自动化WinCCIIIThedesignofthevendingmachinebasedonPLCAbstractNowwiththedevelopmentofthecityscaleismoreandmorebig,thevendingmachineswereplacedinmanypublicplaces,convenient,satisfypeople'sdemandforpeopleatthetimeofpurchaseofsimpleitemsprovidesaconvenient.SomeofthetraditionalvendingmachineismostlyUSESasingle-chipcomputercontrolmode,anti-interferenceabilityisrelativelypoor,thesystemhardwaredesignismorecomplex,itishardtoguaranteethestabilityandreliabilityofthesystem,repairandmaintenancedifficulties.ThedesignofavendingmachinebasedonPLCcontrolsystem,simpleexpoundsthedevelopmentforegroundandthebackgroundofthevendingmachine,detailedanalysisofitsmainfunctionsandcharacteristics,putsforwardthetotaldesignscheme;ThisdesignbasedonWinCCandSiemensS7-300PLC,mainlytothevendingmachinehardwareandsoftwareaspectsofsimulationdesign,usedthesequencecontrolprogramdesignthinking,designthesystemcontrolprogram,includingthecoinprogram,purchasingproceduresandrefundmoney.Keywords:Vendingmachine;PLC;automation;WinCCIV目录前言............................................................................................................................................................1第1章自动售货机的介绍.............................................................................................................21.1自动售货机概述..............................................................................................................................21.2自动售货机前景分析.....................................................................................................................31.2自动售货机功能分析.....................................................................................................................4第2章总体设计方案........................................................................................................................52.1系统整体设计方案.........................................................................................................................52.2自动售货机的组态设计方案.......................................................................................................52.3系统硬件结构框图..........................................................................................................................62.4总体方案设计...................................................................................................................................7第3章自动售货机硬件结构设计.............................................................................................93.1硬件选择...........................................................................................................................................93.1.1电机的选择.............................................................................................................................93.1.2货币处理装置..........................................................................................................................93.1.3送出机构..................................................................................................................................93.1.4按钮装置................................................................................................................................103.1.5显示装置................................................................................................................................10第4章自动售货机控制系统设计...........................................................................................104.1基于PLC的自动售货机控制系统...........................................................................................104.1.1自动售货机硬件系统的组成部分及工作流程............................................................104.1.2自动售货过程的控制子系统简述...................................................................................114.1.3基于PLC的自动售货机控制...........................................................................................124.2PLC控制系统设计编程要求及基本原则..............................................................................134.2.1PLC控制系统设计编程要求............................................................................................134.2.2PLC控制系统设计的基本原则........................................................................................14V4.3自动售货机PLC控制方案设计................................................................................................144.4PLC选型..........................................................................................................................................154.4.1PLC的介绍............................................................................................................................154.4.2PLC概述..........................................................................