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1、外文翻译Energy-savingsolutionforcommercialbuildingsCommercialbuildingsenergy-savingsolutionforthestatusquoofChina'selectricityindustrygovernmentagencies,enterprises,universities,hotels,hospitalsandotherbuildingshavewecannotignorethecost,thatis,hightariffs,andweoftenspend
2、alotofenergythroughadministrativemeanstoEnergymanagementandenergyconservationannouncedAnalog-to-digital(A/D)converter:Thepartofamicroprocessor-basedcontrollerthatchangesananaloginputsignaltoadigitalvalueforusebythemicroprocessorinexecutingsoftwareprograms.Analoginput
3、valuestypicallycomefromtemperature,pressure,humidity,orothertypesofsensorsortransducers.Applicationsoftware:Programsthatprovidefunctionssuchasdirectdigitalcontrol,energymanagement,lightingcontrol,eventinitiatedoperations,andotheralarmandmonitoringroutines.Configurabl
4、econtroller:Acontrollerwithasetofselectableprogramswithadjustableparametersbutwithouttheabilitytomodifytheprograms.Digital-to-analog(D/A)converter:Thepartofamicroprocessor-basedcontrollerthatchangesdigitalvaluesfromasoftwareprogramtoanalogoutputsignalsforuseinthecont
5、rolsystem.Theanalogsignalsaretypicallyusedtopositionactuatorsoractuatetransducersandrelays.Directdigitalcontrol:Acontrolloopinwhichadigitalcontrollerperiodicallyupdatesaprocessasafunctionofasetofmeasuredcontrolvariablesandagivensetofcontrolalgorithms.Microprocessor-b
6、asedcontroller:Adeviceconsistingofamicroprocessorunit,digitalinputandoutputconnections,A/DandD/Aconverters,apowersupply,andsoftwaretoperformdirectdigitalcontrolandenergymanagementroutinesinaHVACsystem.Operatingsoftware:Themainoperatingsystemandprogramsthatscheduleand
7、controltheexecutionofallotherprogramsinamicroprocessor-basedcontroller.Thisincludesroutinesforinput/output(I/O)scanning,A/DandD/Aconversion,schedulingofapplicationprograms,andaccessanddisplayofcontrolprogramvariables.System-levelcontroller:Amicroprocessor-basedcontro
8、llerthatcontrolscentrallylocatedHVACequipmentsuchasvariableairvolume(VAV)supplyunits,built-upairhandlers,andcentralchillerandboiler
