外文翻译-自动浇花系统.doc

外文翻译-自动浇花系统.doc

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本科毕业设计

（外文翻译）

题目自动浇花系统的设计

姓名刘富强

专业自动化

学号201042048

指导教师赵明冬

郑州科技学院电气工程学院

二○一四年五月

外文翻译

NewEnvironmentParametersMonitoringAndControlSystemForGreenhouseBasedOnMaster-slaveDistributed

Abstract

Accordingtotheactualneedofmonitoringandcontrolofgreenhouseenvironmentparametersinruralareas,amaster-slavedistributedmeasurementandcontrolsystemisdesigned,inwhichPCistakenasthehost.ThesystemconsistsofPC,soilmoisturemeasurementandcontrolmodule,temperatureandhumidity,andCO2monitoringandcontrolmodule.Inthesystem,PChaslargeamountofdatastoragewhichiseasytomakeuseoffuzzycontrolexpertsystem,configurationsoftware-KingViewisusedtodevelopsoftwareforPC,bywhichthedevelopmentcycleisshortenandafriendlyhuman-computerinteractionisprovided.EachmonitoringandcontrolmoduleconsistsofSTC12seriesofmicrocontrollers,sensors,relaysetc.Differentmodulesareselectbasedontheneedifsystemtoachievecontrolgreenhouseinpartitionandblock.

IINTRODUCTION

Tomodernindooragriculture,theautomaticmeasurementandcontrolofenvironmentparametersisthekeytoachievecropyieldandqualityofgreenhouse.Inrecentyears,facilitiesagriculturedevelopsvigorouslyinourcountry,matchedwithit,themonitoringandcontrolinstrumentofgreenhousehavealsomadecertaindevelopment.Afternearly10yearsofunremittinghardwork,ourresearchteamofmeasurementandcontrolsystemofagricultureenvironmentparameters,designedanintelligentmeasurementandcontrolsystemofdistributioncombinedofgreenhousewhichcanbepopularizedinthevastruralareas.Thissystemismainlycontroloftemperature,humidity,CO2concentration,soilmoistureandilluminationofgreenhouse.OFSCM,asthedatastorageissmall,displayinterfaceissingle,amountofinformationislimited,butitscapabilitypriceratioishigh,soitisusedasafrontunitofdataacquisitionandcontrol;andofPC,ithasalargeamountofdatastorage,richsoftware,convenienthuman-computerinteraction,andsoon.Ifweuseoutdatedandlow-pricedPC,takingthePCastheuppermachine,takingthedifferentfunctioncontrolmodulescomposedofmultiplemicrocomputersasthelowermachines,thenamaster-slavedistributedandintelligentcontrolsystembasesonmicrocomputerismadeup,bywhichbothbettermonitoringandcontrol,displayanddatacollectionormanagementareachieved,butalsolowercostofsystemisgetaccordingtotheactualneed.

IISYSTEMSTRUCTUREANDPRINCIPLE

Themostmarkedfeatureofthedistributioncombinedandintelligentcontrolsystemgreenhouseisthatofincorporatingwithdataacquisition,controlandmanagementasawhole,modulecombination,simplestructure,convenienthuman-computerinteraction,andusingtechnologyofintelligentexpertfuzzycontrol,whichcanadapttoavarietyofcropmanagementcontrolingreenhouse.ThebasicstructureofthesystemisshowninFig.1.

Thestructureofthedistributedsystemiscomposedoftwolayers:

theupperandlower.Inthetop-pricePCistakenasthehosttomakesystemmanagementandexpertsfuzzyoperationinintelligent,andtoprovideafriendlyhuman-computerinterface,andtorealizetheunitedmonitoringandmanagementofgreenhouse;theloweriscomposedofaseriesofmodulesofdifferentfunction,andineachmodule,asinglechipofAT89Cisadoptedasthelowermachine,RS485isusedtocommunicatePCwithallAT89C,andthenthecollection,processingandcontrolofthegreenhouseparametersisachieved.Eachfunctionmoduleiscompletelyisolatedinelectrical,anyfailureonthenoduledoesnotproduceanyeffectonothermodules.Thesystemcollectsseparatelywaysofenvironmentinformationthrougheachmonitoringandcontrolmodule,andsendsittohostPCthroughtheRS485interface.AndinthePCconfigurationcontrolsystem,theacquiredparametersarecomparedwiththevaluesofsetting,thenaccordingtoavarietyofexpertintelligentfuzzycontrolsystemofcropsatdifferentgrowthstages,thefuzzycontrolinstructionsontheenvironmenttemperature,humidity,CO2concentration,soilwatercontentandthecorrespondingoperationinstructionsoralarmaregiven.

ThesystemisappliedinruralgreenhousesinQinhuangdao.Usuallyat1/4nearEastandWestendinagreenhouse,andattheheightof1.5mfromthegroundinthemiddleinthenorthernhalf（nearthewetcurtain）andthesouthernhalf（nearthefan）,amoduleofairtemperatureandhumidity,CO2concentrationandamoduleofsoilmoisturecontentareset;amoduleofsoilmoisturecontentwillbeaddedinthemiddleofthegreenhouseaccordingtotheactualcondition;attheheightof1.5minthemainentrance,awatertankisset,ofwhichthesolenoidofdriptubeshouldbesetba