石河子大学2011届毕业设计《基于单片机的温度与湿度解耦控制系统设计》外文文献AbstractClimateconditionscontrolemphasesofautomaticcontrolgreenhousesintroducedfromabroadaredifferentfromtheseinhomeandtheintroducingandproductioncostofthemissohigh,soitisdifficulttopopularizeandusecosmically.Atpresent,ingreenhousesdesignedandbuiltinhomeitself，thedegreeofenvironmentcontrolandmodernmanagementofmostofthemissolow,sotheycannotsatisfycrops'demandforhighproductionandplantingalltheyear;somecanonlycarryoutcontrolonpartialenvironmentfactorswithoutconsideringmutualaffectandcouplingofthemintheprocessofcontrol;somestillneedmanualcontrol;sothesefactorsgreatlyrestrictexertionofeconomicbenefitofgreenhouses.Changingtraditionalmodesofcontrol;practicingcomputermonitoringandestablishinggreenhouseautomaticmonitoringsystemaccordwiththesituationofChinahaveimportantmeaningforquickeningmoderndegreeofgreenhouseproductioninourcountryandincreasingbenefitofgreenhouses.Basedonsummarizingformers'researches,thepaperanalyzesenvironmentalparameters，theintegrativecontrolpropertyofgreenhousesystemsandthecontrolprocesswhichisanonlinear,delayandcomplicatedsystem;Basedonanalyzingmodesofcurrentgreenhousemonitoringsystemsandpropertiesofsingle-chipmicrocomputers,apracticalautomaticmonitoringsystemforgreenhouseenvironmentisdesignedwhichcanrealizethemonitoringofeveryparameteringreenhouseenvironmentbysyntheticallyusingsensortechnology,fuzzycontroltheory,communicationtechnologyandmicrocomputertechnologyThesystemhardwareiscomposedoftwoparts:alower-levelandahigher-levelcomputer.Thehigher-levelcomputerisaPCmicrocomputerwhichistheheadquarterofthesystemandfinishestheunifiedmanagementandcontrolofagreenhousebywayofCOMportRS-232connectingwiththelower-levelcomputer.Inmonitoringenvironment,thesystemcanfinishmonitoringforthisnonlinearanddelaysystemandrealizecrops'demandforgreenhouseenvironmentbyusingfuzzycontroltheoryandtechnology.Thecentralcomponentofthelower-levelcomputeris8098single-chipmicrocomputerofMCS-96series,whichisusedtocollect,retreatcontroland