MACROBUTTONMTEditEquationSection2EquationChapter1Section1SEQMTEqn\r\h\*MERGEFORMATSEQMTSec\r1\h\*MERGEFORMATSEQMTChap\r1\h\*MERGEFORMAT2014届分类号:TP单位代码:10452毕业论文（设计）基于PLC的温室大棚控制2014年04月09日临沂大学2014届本科毕业论文（设计）摘要温室已成为当今时代反季节作物培育的主要场所，随着科技的发展，温室技术已日臻成熟。同时，温室技术合理利用农业资源、保护生态环境、提高农产品产量及在国际市场竞争力的这一特性，深受广大反季节作物培育者的喜爱。如何能使温室实现全自动化控制，减少人力的参与，已成为温室技术的重要研究课题之一。随着过程控制技术、自动检测技术、通信技术的发展，将工业上较为成熟的、先进的控制方法和管理手段引入到农业的生产设施中，实施有效的温室环境控制，已成为现阶段温室技术的主要研究方向。本文介绍了温室工作环境的控制原理，讨论了在温室控制中引入PLC技术构成分布式控制系统的方法,详细介绍了系统的特点、组成、硬件设计、实时动态监控系统及通信问题。分布式的控制结构,使各子系统相对独立,管理与控制功能分开,易于实现群控化管理,提高了系统的可靠性,且易于扩展。关键词:温室大棚;PLC;集散控制；智能控制ABSTRACTGreenhousehasbecomethemainplaceintoday’seraanti-seasoncropcultivation.Withthedevelopmentofscienceandtechnology,thegreenhousebecomesmoreandmoremature.Atthesametime,greenhouseutilizingagriculturalresources,protectingtheenvironment,improvingagriculturalproductionandthecharacteristicsofthecompetitivenessintheinternationalmarket,wasdeeplylovedbythemajorityofanti-seasoncropbreeders.Howtomakethegreenhousefullyautomatedcontrolandreducehumaninvolvement,hasbecomeanimportantresearchtopicingreenhousetechnology.Withthedevelopmentoftheprocesscontroltechnology,automaticdetectiontechnologyandthecommunicationtechnology,advancedcontrolmethodsandmanagementtoolsintroducedintheindustrytoagricultureproductionfacilities,theimplementationofeffectivecontrolofthegreenhouseenvironment,greenhousetechnologyhasbecomeamainresearchdirectionofpresentgreenhousetechnology.Thispaperintroducesthecontrolprincipleofgreenhouseenvironment,discussestheintroductionofPLCtechnologyinthegreenhousecontrolsystemofdistributedcontrolsystem,detailedintroducesthesystemcomposition,characteristics,hardwaredesign,real-timedynamicmonitoringsystemandcommunicationproblems.Distributedcontrolstructure,makeeachsubsystemarerelativelyindependentandseparatemanagementandcontrolfunction,easytoimplementmanagement,thegroupcontrol,improvethereliabilityofthesystem,andeasytoextend