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外文翻译--温室控制系统.doc

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外文翻译--温室控制系统.doc

Greenhousecontrolsystemone,automaticcontrol.Usingthecomputertechnologyandthemoderncontroltheorytothegreenhouseeachkindofenvironmentfactor,includingthetemperature,theillumination,thehumidity,theCO2densityandappliesfertilizerandsoon,carriesontheautomaticcontrolandadjustsintothegreenhousecontrolthefundamentalmode.Accordingtothegreenhousecropshabitofgrowthandthemarketneed,thepartevencompletelygetsridofthenaturalenvironmenttherestraint,makestheartificialcreationbeingsuitablecropstogrowthebestenvironmentautomaticcontroltechnologicalmeanstobecomethemainstream.Thistimesgreenhousehasthequitecompletecontrolsystem,haseachkindofsensortogatherthegreenhouseenvironmentaldata,thesupervisorysystemrealtimemonitorenvironmentalvariationandthecontrolimplementingagencymovement,thegoodmanmachinecontactsurfacecausesgrowersoperatingprocessimagemoreovertobesimple.Thiskindofcontrolsystemneedsthegrowertoinputthegreenhousecropstogrowneedstheenvironmentthetargetcomponent,thecomputerwiththetargetvaluewhichestablishesbeforehandcarriesonthecomparisonaccordingtosensorsactualobservedvalue,decidedthatthegreenhouseenvironmentfactorthecontrolledprocess,thecontrolcorrespondingorganizationcarriesontheheating,todecreasetemperatureandtoventilateandsoonmovements.Thecomputerautomaticcontrolsgreenhousecontroltechnologyhasrealizedtheproductionautomation,suitstheformalizationproduction,thelaborproductivityhastheenhancement.Throughchangesthegreenhouseenvironmenthypothesistargetvalue,maycarryonthegreenhouseinnerrimboundaryclimatecontrolautomatically,butthiscontrolmodemakestheresponsepromptlywithdifficultytothecropsgrowthconditionschange,involvestheinherentlawswhichwithdifficultythecropsgrow.Atpresentourcountrymajorpartindependentdevelopmentslargescalemodernizedgreenhouseandtheintroductionoverseasequipmentbelongstothiscontrolmode.Second,intellectualizedcontrol.Thisisinthegreenhouseautomaticcontroltechnologyandintheproductionpracticefoundation,throughthesummary,thecollectionagriculturedomainknowledge,thetechnologyandeachkindoftentativedataconstructstheexpertsystem,takeestablishestheplantgrowththemathematicalmodelasthetheorybasis,onekindwhichtheresearchdevelopsthegreenhouseexpertcontrolsystemtechnologywhichsuitsthedifferentcropstogrow.Thiskindofintellectualizationscontroltechnologytheagronomistsystemandthegreenhouseautomaticcontroltechnologyorganicsynthesis,takesbythegreenhousecombinedenvironmentfactorgatheringandtheanalysisobject,throughexpertsystemsconsultationandthedecisionmaking,givesthebestenvironmentparameterwhichthedifferenttimecropsgrowneed,andrestsonthisoptimumparametertothedatawhichrealtimeobtainstocarryonfuzzyprocessing,theautomaticselectionisreasonable,theoptimizedadjustmentscheme,thecontrolimplementingagencyscorrespondingmovement,realizesthegreenhouseintellectualizedmanagementandtheproduction.Theagronomistsystemhasprovidedonebrandnewprocessingcomplexagriculturequestionthinkingmethodandthetechnologicalmeansforus.Itcanactaccordingtothegreenhouseenvironmentalconditionandthecropsgrowthcondition,appliesthesuitableknowledgeexpressionandtheregularization,theinferencedecisionmakingleavesmostsuitsthegreenhouseenvironmentwhichthecropsgrow.Appliestheagronomistsysteminthegreenhouserealtimemonitoringandtheautomaticregulationisthegreenhousedevelopmentnewluminescentspot.Thiscontrolmodebothcanmanifesttheinherentlawswhichthecropsgrow,thedisplayagronomistsinagriculturalproductioninstructionfunction,andmayusethecomputertechnologyfullythesuperiority,causessystemsregulationtobeconvenientandeffective,realizesthegreenhousecompleteintellectualizedcontrol.Therefore,thegreenhouseexpertcontrolsystemtechnologyisonekindisquiteideal,thecomparisontohavethecareerdevelopmentcontrolmode.Modernlargescalegreenhousetoachieveintelligentcontrol,computercontrolsystemmusthavenaturalventilationsystem,externalshadingsystems,internalinsulationandfinishsystems,wetcurtain/fanforcedcoolingsystem,CO2AirSystem,micromistsystem,premiumopticalsystem,irrigation/fertilizationsystem,breedingsystem,topspraysystem,heatingsystem,plantprotectionsystems,lightingsystems,pickingsystemsequipment.Asavectorcontrolgreenhousecontrolsystemfromthecontrollersadvancedandreliableperformanceofthesensor,asoundartcontrolprocedures,suchasprintersandmonitors,toachievetheabovementionedgreenhouseequipmenttomonitortheoptimaloperation.Changringdevelopedautomatedcontrolsystemtoautomaticmeasurementofgreenhouseclimateandsoilparameters,andallgreenhouseequipmentcanbeconfiguredtoachieveoptimaloperationofautomaticcontrol,suchaswindows,heating,cooling,humidity,light,CO2supplementedirrigation,fertilization,andcirculationandsoon.Changringgreenhousedevelopedintelligentcontrolsystemclosedloopcontrolmethodofoutdoorwindspeed,winddirection,sunlightradiation,temperatureandindoortemperatureandhumidityfactors,suchascollection,processingthroughthecontrollerwillcontroltheoutcomeofreturntothesceneandadjustthesceneimplementingagencies,theclimaticfactorsontheindoorrealtimecontrolimplementation,inordertoguaranteethecontrolofthereliabilityofprecisionandcontrol.Intelligentcontrolsystemofgreenhousegreenhouseenvironmentcontrolprocessparametersandoperatingparametersoftheexecutingagencyandotherinformationthroughthesensorintoelectricalsignalssenttothecomputer,theagriculturalexpertsystembasedondifferentcropsatdifferenttimesofthephysiologicalneedsofcropgrowthindifferentperiodsoftimesetautomaticallytemperature,humidity,lightandCO2concentrationasanidealrangeofthebestdataandtheactualtestingdataanddeviationsfromtheidealdatafortheregulationoftheamountofgreenhousegases.Whenthegreenhousetemperaturedeviationovertheupperlimitset,theissueofregulationofcomputerinstructions,theexecutingagencytoopentheventilationcoolingsystemifthegreenhousetemperaturebelowthesetminimumdeviation,theissueofregulationofcomputerinstructions,opentheventilationsystemwhenthehumidityislowerthanforHumiditywillbeunderthelimit,theissueofregulationofcomputerinstructions,openthehumidificationheatingsystemwhenCO2concentrationsexceedingtherangelimit,thecomputerautomaticallyswitchesventilationsystemandtheCO2generator.Greenhousecontrolsystemintelligentgreenhouseprospectsforthedevelopmentofstrategiesforsustainabledevelopmentintheopen,undertheguidanceofthenewdirectionofagriculture.Cropyieldsfromthepointofview,ithasahighoutputvalueperunitareaonenvironmentalprotectionpointofview,itcannotonlyoutputcleanfruitsandvegetables,andasaresultofprecisecontrolofchemicalfertilizersandotheradditivesusedalsotoavoidtheonsoilandgroundwaterpollution.Greenhousevegetableproductionhasbeenextendedfromtheflowers,fruitsandlivestock,aquaculture,forestnursery,mushroom,Chineseherbalmedicineandotherfields.ThemodernizationofChinasgreenhouse,withtheexceptionofintelligentcontrolsystems,thebasichardwaresystemtoachievesynchronizationwiththeinternationallevel.Canbeseenthattheagriculturalexpertsystemappliedtorealtimegreenhousemonitoringandautomaticcontroltechnologyisnodoubtanewbrightspotinthegreenhouse,thegreenhouseisalsoatrendinthedevelopmentofcontroltechnology.Itsdevelopmentpotentialandapplicationofalargespace,theactualproductionofthefarmersareveryimportantguidingsignificance.Meettheneedsofthegreenhouseproductionandeasethecontradictionbetweenthelackofexpertsinthefield,therebygreatlyimprovingtheconversionrateofscienceandtechnology,inplaceandthepenetrationrate.温室控制系统一、自动控制。利用计算机技术及现代控制理论对温室内的各种环境因子,包括温度、光照、湿度、CO2浓度和施肥等,进行自动控制和调节成为温室控制的主要方式。根据温室作物的生长习性和市场的需要,部分甚至完全摆脱自然环境的约束,使人为创造适宜作物生长最佳环境的自动控制技术手段成为主流。此时的温室有比较完整的控制系统,有各种传感器采集温室环境数据,监控系统实时监测环境变化及控制执行机构的动作,良好的人机界面使种植者的操作过程形象而且简便。这种控制系统需要种植者输入温室作物生长所需环境的目标参数,计算机根据传感器的实际测量值与事先设定的目标值进行比较,以决定温室环境因子的控制过程,控制相应机构进行加热、降温和通风等动作。计算机自动控制的温室控制技术实现了生产自动化,适合规模化生产,劳动生产率得到提高。通过改变温室环境设定目标值,可以自动地进行温室内环境气候调节,但是这种控制方式对作物生长状况的改变难以及时作出反应,难以介入作物生长的内在规律。目前我国绝大部分自主开发的大型现代化温室及引进的国外设备都属于这种控制方式。二、智能化控制。这是在温室自动控制技术和生产实践的基础上,通过总结、收集农业领域知识、技术和各种试验数据构建专家系统,以建立植物生长的数学模型为理论依据,研究开发出的一种适合不同作物生长的温室专家控制系统技术。这种智能化的控制技术将农业专家系统与温室自动控制技术有机结合,以温室综合环境因子作为采集与分析对象,通过专家系统的咨询与决策,给出不同时期作物生长所需要的最佳环境参数,并且依据此最佳参数对实时测得的数据进行模糊处理,自动选择合理、优化的调整方案,控制执行机构的相应动作,实现温室的智能化管理与生产。农业专家系统为我们提供了一种全新的处理复杂农业问题的思想方法和技术手段。它能够根据温室环境条件和作物生长状况,应用适当的知识表达和规则化,推理决策出最适合作物生长的温室环境。将农业专家系统应用于温室的实时监控与自动调控是温室发展的新亮点。这种控制方式既能体现作物生长的内在规律,发挥农业专家在农业生产中的指导作用,又可充分利用计算机技术的优势,使系统的调控非常方便和有效,实现温室的完全智能化控制。因此,温室专家控制系统技术是一种比较理想、比较有发展前途的控制方式。现代化大型温室实现智能化控制,必须具备计算机控制系统、自然通风系统、外遮阳系统、内保温系统、湿帘/风扇强制降温系统、CO2补气系统、微雾系统、补光系统、灌溉/施肥系统、育苗系统、顶喷淋系统、加热系统、植保系统、照明系统、采摘系统等配套设备。而作为温室控制载体的控制系统则由先进的控制器、性能可靠的传感器、完善的尖端控制程序、打印机和显示器等组成,以实现对上

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