皖西学院本科论文（设计）基于PLC温室温度检测与控制系统的设计作者XXX指导教师XXX摘要：温度检测和控制对人类日常生活、工业生产、气象预报、物资仓储等都起着极其重要的作用。在许多场合，及时准确获得目标的温度信息是十分重要的，近年来，温度测控领域发展迅速，并且随着数字技术的发展，温度的测控芯片也相应的登上历史的舞台，能够在工业、农业等各领域中广泛使用。本系统是通过温度传感器采集温度数据，利用温度测量与温度控制相关理论知识设计的PLC温控系统。运用PLC设计温室温度测控系统，从自动化运行的角度出发，分析讨论其产生故障的可能原因。同时从实际硬件电路出发，分析电路的工作原理，根据设计具体情况提出修改方案和解决办法。我所使用的温度传感器是XP-TP-A-V010-D，它具有体积小，精度高和功耗低等特点。温度传感器采集到的温度数据是模拟信号，因此在系统中，我将PLC增加了一个模拟量扩展模块EM235,采集到的温度信号便能通过该模块直接输入到PLC中，PLC则对数据进行分析、处理，并通过执行部件对温度进行控制，这种自动化、智能化的处理方式在温室温度检控系统中将有着无限的应用和发展空间。关键字：PLC，温度传感器，检测,控制DesignofdetectionandcontrolsystemofgreenhousetemperaturebasedonPLCAbstract:Temperaturemeasurementandcontrolplaysanextremelyimportantroleinhumandailylife,includingindustrialproduction,weatherforecast,materialstorage,etc..Inmanycases,itisveryimportanttoacquirethetimelyandaccurateinformationofthetemperatureofthetargets.Recently,alongwiththedevelopmentofdigitaltechnology,therapiddevelopmentoftemperaturemeasurementandcontrolhasbeenwidelyusedinvariousindustrialagriculturalfields,meanwhile,thechipsofmeasurementandcontrolthetemperaturehavebeenonthehistoricalstage.Thissystem,bycollectingtemperaturedatathroughthetemperaturesensor,withtheapplicationofPLCcontrolsystembasedonthetheoreticalknowledgeabouttemperaturemeasurementandcontrol,intendstoanalyzethepotentialcausesofthebreakdownsintheirautomaticoperation.Atthesametime,startingfromthecircuitsofactualhardware,andviaanalyzingoperatingprinciplesoftheseelectriccircuits,thissystemisaimingatputtingforwardtherevisingproposaslandsolutionsaccordingtothespecificsituations.ThetemperaturesensorusedbytheauthorisXP-TP-A-V010-D,whichis皖西学院本科论文（设计）distinguishedwithsmallsize,highprecisionandlowpowerconsumption.Thetemperaturedatacollectedbythetemperaturesensorisananalogsignal.Therefore,inthesystem,ananalogextendedmoduleofEM235.IwillbeaddedtothePLCsothattemperaturesignalcollectedbythemodulecanbedirectlyinputtoPLC,andPLCwillanalyze,processthedata,andcontrolthetemperaturethroughregulatingthecomponents.Thiskindofautomaticandintelligentdisposurewillbedefinitelyininfiniteapplicationandtremendousdevelopmentinthetemperaturecontrollingsysteminthegreenhouse.Keyword:PLC,Temperaturesensors,Detection,Control皖西学院本科论文（设计）目录1.绪论.......................................................12.系统总体设计方案..................................22.1.总体方案..........................................22.2.系统硬件连接图................................43.可编程逻辑器件（PLC）...........................53.1.PLC的定义............................................53.2.PLC的分类............................................53.3.PLC的基本结构.....................................53.4.PLC的工作原理...................................63.5.PLC主要厂家及西门子S7—200....................74.温度传感器............................................94.1.温度传感器的分类............................94.2.温度变送器...
