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1、四层杂物电梯PLC控制外文翻译Abstractmicroelectronictechnology'sdevelopment,elevator'sdraggingwayandthecontrolmethodhashadtheverybigchange,theexchangevelocitymodulationisthecurrentelevatordraggingmaindevelopmentdirection.Atpresenttheliftcontrolsystemmainlyhasthreec
2、ontrolmodes:Followingelectriccircuitcontrolsystem(“earlyinstallmentelevatormanyblack-whitecontrolsystem),PLCcontrolsystem,microcomputercontrolsystem.Becausetheblack-whitecontrolsystemthefailurerateishigh,thereliabilityisbad,controlmodenotnimbleaswella
3、sconsumedpowerbigandsoonshortcomings,atpresenthasbeeneliminatedgradually.Althoughthemicrocomputercontrolsystemhasthestrongfunctionintheintelligentcontrolaspect,butalsohastheinterferencerejectiontobebad,thesystemdesigniscomplex,generallytheservicemenma
4、sterflawswithdifficultyandsoonitsservicetechnology.ButPLCcontrolsystem,becausemovesthereliabilitytobehigh,theuseserviceisconvenient,anti-jamming,thedesignandthedebuggingcycleisshortandsoonmerits,timeistakenseriouslythepeopleandsoonmerits,havebecomepre
5、sentusemostcontrolmodesintheliftcontrolsystem,atpresentalsowidelyuseinthetraditionblack-whitecontrolsystem'stechnologicaltransformations.TheoriginanddevelopmentoftheelevatorElevatorintheChinesedictionaryexplanation:buildingelectricitypoweredlift,inste
6、adofwalkingupanddownthestairs.Whenitcomestoliftfromtheoriginofthe2600BCEgyptiansbuiltinPyramidusingtheoriginalliftingsystemtostart,butthiskindofcraneenergyarehuman.By1203,twoFrenchmonasteryinstalledacrane,thedifferenceisjustthemachineistheuseofdonkeya
7、spower,loadbyaroundalargedrumropeforhoisting.ThismethodhasbeenusedtomodernuntilWattinventedthesteamengine,inabout1800,mineownerscanusethecranetomineincoaltransportation.Forhundredsofyears,peoplemadevarioustypesofelevators,theyallhaveacommondefect:aslo
8、ngastheliftingropesnaps,liftingladderherapidlyhitbottomlayer.1854Otisdesignabrake:intheliftplatformmountedontopofatruckwithaspringandabrakeleverandLiftWellsRoadonbothsidesoftheguiderailisconnectedwiththeliftingrope,wagonsprings,thisisonlytheli
