摘要智能温室控制实训模型主要由温度设定、风机变速、光照控制和等几部分组成。温度的控制过程是将温度检测传感器采集的内、外部环境温度与设定温度值进行比较,PLC模拟量模块根据温差值输出模拟量来控制加热器电压从而控制加热的快慢，根据温差值给出风机相应信号来切换风机的高速、低速、停止三种运行模式。光照控制是根据温差值及内外光照信号来控制遮阳网的动作。整个实训过程既可以通过西门子S7-200PLC来控制温度系统进行控制和实时监控又可迸行手动控制还能开展对智能温室的安装、维护和设备操作等技能训练。而西门子S7-200PLC则是其控制核心，其编程方式采用PID闭环控制！关键词：智能温室控制、西门子S7-200PLC.PID闭环控制1ThisdocumentisproducedbytrialversionofPrint2Flash.Visitwww.print2flash.comformoreinformationAbstractIntelligentgreenhousecontroltrainingmodelismainlycomposedoftemperaturesetting,fanspeed,lightcontrolandPCsoftwarecontrolandsoonseveralparts.Temperaturecontrolofthetemperaturedetectionsensoracquisitionprocessistheinternalenvironmenttemperatureandsettingtemperaturevalue,PLCanalogoutputmoduleaccordingtothetemperaturedifferencevalueanalogvoltagetocontroltheheatertocontrolthespeedoftheheat,accordingtothetemperaturedifferencevaluetoswitchthefanfanisgiventhecorrespondingsignalofhighspeed,lowspeed,stopthreeoperationmodes.Lightcontrolisaccordingtothetemperature击fferencevalueandtheinternalandexternallightsignaltocontroltheactionofsun-shadenet.Thewholetrainingprocesscancontrolandreal-timemonitoringthroughthehostcomputersoftwarecanalsobeusedfbrmanualcontrolcancarryouttheinstallation,maintenanceandequipmentoperationskillstrainingfbrintelligentgreenhouse.AndSiemensS7-200PLCisthecontrolcore,thewayofprogrammingusingPIDclosed-loopcontrol!Keywords:temperaturecontrolPLCprogrammablecontroller2ThisdocumentisproducedbytrialversionofPrint2Flash.Visitwww.print2flash.comformoreinformation目录摘要.................................................................1第一章任务与要求.....................................................11.1课题概述............................................................11.1.1温度控制对象...................................................11.1.2试验的开■发与调试...............................................11.2设计内容与要求......................................................11.3参数要求.................................................