基于PLC的温室大棚控制系统设计

山东科技大学泰山科技学院本科毕业设计论文题目：基于PLC的温室大棚控制系统设计系部名称：机电工程系班级名称：电气工程及其自动化学生姓名：学号：指导老师：完成日期：2016年6月6日山东科技大学泰山科技学院学士学位论文I摘要温室大棚是用来栽培农作物的设施，它能改变农作物的生长环境，使其能够外界的四季变化和恶劣气候，为农作物的生长创造适宜的条件。温室大棚作为高效农业的重要组成部分，已经成为我们研究的方向。如何利用科学技术控制温室内的各种环境因子，已成为我国温室大棚行业研究的重要课题之一。本论文主要介绍了基于PLC控制的温室大棚系统设计方案，该研究中将采用温度传感器、CO２浓度传感器、光照传感器对温室大棚中各项指标进行检测，将测量值送入PLC中，在PLC中将其与设定值进行比较，再发出相应的指令驱动外围设备来调控温室大棚内的环境参数，从而实现了温室大棚的自动化、智能化控制。在此基础上，实现监测、数据记录、数据输出显示等功能，实现了控制系统优良的人机界面，为温室大棚的研究提供新的方向。关键词：温室大棚；可编程控制器（PLC）；传感器；控制；山东科技大学泰山科技学院学士学位论文IIABSTRACTGreenhousesareusedforgrowingplantsinarangeoffacilities,itcanchangethecropgrowingenvironment,enablingittotheoutsideoffourseasonsandharshclimate,creatingsuitableconditionsforcropgrowth.Greenhousesasimportantcomponentofagriculture,hasbecomeourresearchdirections.Howtousescienceandtechnologytocontrolenvironmentalfactorswithinthegreenhouse,greenhouseindustryhasbecomeanimportantsubjectofstudy.Describedinthispaper,basedonSiemensS7-200seriesPLCcontrolsystemdesignofgreenhouseTheresearchwillbeusedtemperaturesensor,andCO2concentrationsensor,andlightsensorongreenhousebigshedinthetheindexfordetection,willmeasurementvalueintoPLCinthe,inPLCwillbeitsandsetvalueforcompared,againissuedcorrespondingofinstructiondriveperipheralequipmenttoRegulationgreenhousebigshedwithinofenvironmentparameter,toachievedhasgreenhousebigshedofautomation,andintelligentofcontrol.Onthisbasis,usingconfigurationsoftwareconfigurationdesignofcontrolsystems,monitoring,datalogging,dataoutputfunction,achievingexcellentcontrolsystemhuman-machineinterface,forgreenhouseresearchtoprovidenewdirection.Keywords:greenhouse;programmablelogiccontrollers(PLC);sensor;control;application.山东科技大学泰山科技学院学士学位论文III目录摘要....................................................................................................................ⅠABSTRACT..........................................................................................................Ⅱ目录....................................................................................................................Ⅲ1绪论.................................................................................................................11.1课题概述...............................................................................................11.1.1课题简介...................................................................................11.1.2研究目的及意义.......................................................................11.2国内外研究现状...................................................................................21.2.1国内研究现状...........................................................................21.2.2国外研究现状...........................................................................21.3研究内容...............................................................................................32控制系统的整体控制方案.......................................................................42.1控制系统的设计任务...........................................................................42.2系统的控制方案...................................................................................43控制系统的硬件设计................................................................................73.1电气控制系统设计................................................................................73.1.1系统主电路设计........................................................................73.1.2控制系统各部分控制电路设计................................................73.2PLC简介...............................................................................................123.2.1PLC的产生和系统组成...........................................................123.2.2PLC的工作原理.......................................................................123.3PLC控制系统设计的基本原则及步骤...............................................14山东科技大学泰山科技学院学士学位论文IV3.3.1设计PLC控制系统的基本原则...............................................143.3.2PLC控制系统的设计步骤.......................................................143.4PLC硬件电路设计...............................................................................173.4.1PLC型号的选择.......................................................................173.4.2传感器的选型..........................................................................173.4.3模拟量输入模块EM235............................................................193.4.4PLCO/I地址分配表...............................................................213.4.5PLC硬件接线图设计...............................................................234控制系统的软件设计..............................................................................244.1PLC程序设计方法...............................................................................244.2编程软件STEP7-MICRO/WIN概述.......................................................244.3控制系统的程序设计..........................................................................254.3.1程序的设计思路......................................................................254.3.2程序控制流程图......................................................................264.3.3控制程序设计及分析..............................................................29结论......