外文翻译--工业控制与PLC.doc

IndustrialControlandPLCIndustrialcontrolautomationtechnologyisanapplicationofcontroltheory,instrumentation,computersandotherinformationtechnology,industrialproductionprocessesfordetection,control,optimization,scheduling,managementanddecision-making,toincreaseproduction,improvequality,reduceconsumption,toensurethesafetyThepurposeoftheintegratedtechnology,includingindustrialautomationsoftware,hardwareandsystemsinthree.Industrialcontrolautomationtechnologyasthe20thcentury,theareaofmodernmanufacturingtechnology,oneofthemostimportant,themainsolutiontotheissueofproductivityandconsistency.Althoughtheautomationsystemitselfdoesnotdirectlycreateeffective,butitsproductionprocesstoenhancetheroleofobvious.Chinasindustrialautomationcontrolthepathofdevelopmentaretheintroductionofcompletesetsofequipmenttocarryoutdigestionandabsorptionatthesametime,andthenthedevelopmentandapplicationofasecond.Chinasindustrialcontrolautomationtechnology,industriesandapplicationshavealotofdevelopment,Chinasindustrialcomputersystemsindustryhasbeenformed.Atpresent,industrialcontrolautomationtechnologyistheintelligent,network-basedandintegrateddirection.Tomicro-PLC,network,PCandopendevelopmentAlongperiodoftime,PLCinindustrialcontrolautomationhasalwaysbeenthemainbattlefieldofthefieldforawiderangeofautomationcontrolequipmenttoprovidehighlyreliablecontrol,DCSandindustrialPCwithatrendofthethree.Atthesametime,PLCalsosufferfromtheimpactofothertechnologyproducts,especiallyindustrialimpactofPC.Currently,thePLCmanufacturersaroundtheworldabout200,producingover300kindsofproducts.PLCisstillabroad,thedomesticmarketproducts,suchasSiemens,Modicon,AB,OMRON,Mitsubishi,GEproducts.Afteryearsofdevelopment,thedomesticmanufacturersPLCabout30,butthereisnolarge-scaleproductioncapacityandbrand-nameproducts,itcanbesaidPLChasnotyetformedinourmanufacturingindustry.PLCapplicationinChinaisveryactive,theapplicationofawiderangeofindustries.Expertsestimatethatin2000thedomesticmarketsalesofPLCfor15(20millionunits(ofwhichabout90%ofimports),about25(35billionyuan,anannualgrowthrateofabout12%.Estimatedthatin2005thedemandforNationalPLCwillreachabout250,000units,about35(45billionyuan.PLCmarketisalsoreflectedinthestateoftheworldsmanufacturingsector,fellsharplyafter2000.However,inaccordancewiththeAutomationResearchCorpforecasts,despitetheglobaleconomicdownturn,PLCmarketwillrecover,itisestimatedthattheglobalPLCmarketin2000for7.6billionU.S.dollars,bytheendof2005to7.6billionU.S.dollarswillreturnandcontinuetoincreaseslightly.Miniaturization,networking,PC-basedPLCandopennessarethemaindirectionsoffuturedevelopment.PLC-basedautomationintheearly,PLCbulkyandexpensive.However,inrecentyears,micro-PLC(lessthan32I/O)hasoccurred,thepriceonlyafewhundredeuros.WiththesoftPLC(SoftPLC)controlconfigurationsoftwaretofurtherimproveanddevelop,isequippedwithsoft-PLCconfigurationsoftwareandPC-basedcontrolofthemarketsharewillgraduallyincrease.Atpresent,thefieldofprocesscontrol,oneofthebiggesttrendsistheexpansionofEthernettechnology,PLCisnoexception.PLCisnowagrowingnumberofsuppliersprovidingEthernetinterface.Itisbelievedthat,PLCwillcontinuetoopenthedirectionofthetransferofcontrolsystems,especiallyPC-basedindustrialcontrolsystems.(Source:IndustrialNetwork)Smallsize,diversification,PCandopenthefuturedevelopmentdirectionofDCS.DCSiscurrentlyasmallmarketsharehasbeengraduallyandPLC,industrialPC,FCSsharing.Firstofall,thefuturemaybesmall-scaleDCSsystemwiththeintegrationofthesethree,andsoftDCStechnologywillfirstbedevelopedsmall-scaleDCS.PC-basedcontrolwillbemorewidelyusedinsmallandmedium-sizedprocesscontrol,theDCSwillalsobevendorshavebeenofferingPC-basedsmall-scaleindustrialDCSsystems.OpentotheDCSsystematthesametimetwo-wayupwardanddownwardextensionoftheproductionprocessfromfielddataacrosstheenterprisewithinthefreeflowofinformationtechnologyandcontroltechnology,seamlesslyintegratedtocontrolthedirectionofthedevelopmentofmonitoringandcontrol.Informationtechnologyindustryisdefinedasindustrialproduction,management,businessprocess,throughtheinformationinfrastructure,inanintegratedplatformofinformationacquisition,informationtransmission,informationprocessingandcomprehensiveutilizationofsuchinformation.Todevelopasaresultofindustrialautomationistospeedupthetransformationoftraditionalindustriestoupgradeandimprovetheoverallqualityofenterprises,improvethecountrysoverallnationalstrength,adjustingtheindustrialstructure,toinvigoratelargeandmedium-sizedenterprises,therapidandeffectivewaysandmeans,thestatewillcontinuethroughtheimplementationofaseriesofhigh-techindustryofindustrialprocessautomationofspecial,usinginformationtechnologytostimulateindustrializationandthepromotionofindustrialautomationtechnologytofurtherdevelopandstrengthentechnologicalinnovation,toachieveindustrializationandeconomicdevelopmenttosolvetheunderlyingproblem,tofurtherimprovetheoverallqualityofthenationaleconomyandoverallnationalstrength,thedevelopmentbyleapsandbounds.Todevelopasaresultofindustrialautomationistospeedupthetransformationoftraditionalindustriestoupgradeandimprovetheoverallqualityofenterprises,improvethecountrysoverallnationalstrength,adjustingtheindustrialstructure,toinvigoratelargeandmedium-sizedenterprises,therapidandeffectivewaysandmeans,thestatewillcontinuethroughtheimplementationofaseriesofhigh-techindustryofindustrialprocessautomationofspecial,usinginformationtechnologytostimulateindustrializationandthepromotionofindustrialautomationtechnologytofurtherdevelopandstrengthentechnologicalinnovation,toachieveindustrializationandeconomicdevelopmenttosolvetheunderlyingproblem,tofurtherimprovetheoverallqualityofthenationaleconomyandoverallnationalstrength,thedevelopmentbyleapsandbounds.工业控制与PLC工业控制自动化技术是一种运用控制理论、仪器仪表、计算机和其它信息技术，对工业生产过程实现检测、控制、优化、调度、管理和决策，达到增加产量、提高质量、降低消耗、确保安全等目的的综合性技术，主要包括工业自动化软件、硬件和系统三大部分。工业控制自动化技术作为20世纪现代制造领域中最重要的技术之一，主要解决生产效率与一致性问题。虽然自动化系统本身并不直接创造效益，但它对企业生产过程有明显的提升作用。我国工业控制自动化的发展道路，大多是在引进成套设备的同时进行消化吸收，然后进行二次开发和应用。目前我国工业控制自动化技术、产业和应用都有了很大的发展，我国工业计算机系统行业已经形成。目前，工业控制自动化技术正在向智能化、网络化和集成化方向发展。PLC在向微型化、网络化、PC化和开