基于PLC的啤酒发酵自动控制系统设计

1广州大学松田学院毕业论文（设计）题目___基于PLC的啤酒发酵自动控制系统设计______基于PLC啤酒发酵自动控制系统设计摘要：啤酒发酵是啤酒生产中最重要的一道工序，是决定啤酒质量的最关键的一步。啤酒的发酵是把糖化的姜汁分解成乙醇，由于发酵时间长，过程机理复杂，影响发酵因素很多，对发酵过程缺乏精确的数学模型。从原料到发酵过程，如何控制好温度，压力，让发酵满总生产工艺曲线，决定了啤酒的生产质量和生产效率，发酵过程是啤酒生产过程中的重要环节，2发酵控制系统的任务就是将发酵酒液的实际温度控制在和标准发酵曲线相差有限的误差范围内。过去的啤酒发酵过程，啤酒发酵罐多为人工现场操作调节，手工记录。但随着啤酒产量的不断增加，所需发酵罐也会增多，给生产啤酒带来极大的不便，造成生产质量的稳定，如何提高啤酒生产的综合自动化水平，增强啤酒产业实力成为一个好的研究课题。为止，本文通过对啤酒生产发酵过程的工艺及关键问题的分析，基于PLC设计啤酒生产过程中啤酒发酵自动控制系统。关键词：PLC啤酒发酵温度控制BasedonthedesignofPLCautomaticcontrolsystemofbeerfermentationAbstract:Beerfermentationisoneofthemostimportantprocedureinbeerproduction,isthemostcrucialstepindeterminingthequalityofbeer.Beerfermentationisthebreakdownofsaccharificationgingerintoethanol,duetothelongfermentationtime,theprocessmechanismis3complex,manyfactorsinfluencingthefermentation,thefermentationprocessisalackofaccuratemathematicalmodel.Fromrawmaterialtothefermentationprocess,howtocontrolthetemperature,pressure,andmakefullofthetotalfermentationtechnologycurve,determinestheproductionqualityandproductionefficiencyofbeer,thefermentationprocessistheimportantlinkintheprocessofbeerproduction,fermentationcontrolsystemofthetaskistocontrolthefermentationliquidofactualtemperaturefermentationandstandardcurveislimitedwithintheerrorrange.Thebeerfermentation,beerfermentationtankforartificialfieldoperationadjustment,manualrecord.Butastheincreaseofbeerproduction,thefermentationtankwillbeneededtoincrease,producedbeertobringhugeinconveniencecausedbythestablequalityofproduction,howtoimprovethecomprehensiveautomationlevelofbeerproduction,strengthenthebeerindustrytobecomeagoodresearchtopic.Sofar,thisarticlethroughtothefermentationprocessofbeerproductionprocessandtheanalysisofthekeyproblemsofbeerproductionintheprocessofbeerfermentationbasedonPLCdesignofautomaticcontrolsystem.Keywords:beerfermentationtemperaturecontrolbyPLC4目录1绪论..............................................................................................................................................11.1课题的背景........................................................................................................................11.2国内啤酒生产过程控制概况............................................................................................21.3啤酒生产过程自动控制的作用和意义............................................................................32啤酒发酵........................................................................................................................................32.1啤酒发酵概述....................................................................................................................32.2啤酒发酵的具体过程........................................................................................................32.3啤酒发酵设备....................................................................................................................42.4啤酒发酵工艺曲线............................................................................................................53啤酒发酵自控系统PLC选型和配置..........................................................................................63.1PLC选型..............................................................................................................................63.2S7-200主要功能及特点..................................................................................................83.3文本显示器TD200...........................................................................................................103.4电磁阀PWM.......................................................................................................................103.5PID控制的原理和特点..................................................................................................103.6PLC其他资源配置.........................................................................错误!未定义书签。4啤酒发酵自控系统PLC程序......................................................................................................104.1设计思路..........................................................................................................................104.2系统硬件配置..................................................................................................................134.2.1CPU的选型...........................................................................................................134.2.2模拟量扩展模块...................................................................................................144.2.4控制系统硬件配置...............................................................................................154.2.5其他资源配置........................................................................................................164.3啤酒发酵温度PLC控制系统的I/O分配.....................................................................164.3.1I/O地址分配.........................................................................................................164.4编程软件的介绍..............................................................................................................194.4.1指令系统.........................................................