毕业设计论文英文翻译

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1、英文翻译年级：2004级学号：姓名：魏超专业：机械设计制造及其自动化指导老师：肖世德2007年6月英文翻译一英文DevelopmentofamonitoringandcontrolplatformforPLC-basedapplicationsAbstractThispaperdiscussesthedesignandimplementationofaplatformtoremotelymonitorandcontrolPLC-basedprocessesoverTCP/IPorbyusingtheGSMnetwork.Theplatformi

2、sbuiltusingindustry-standardoff-the-shelfPLCs.IntegratedwitheachPLCarecommunicationprocessorsthatcanbeusedforconnectivitytothenetworkandtoaGSMmodem.Thecommunicationprocessormodule(Ethernetmodule)usedinthiswork,providesanindustrialcompatibleprotocoloverTCP/IPthatachievesthesa

3、mefunctionalityasProfinetbutatamuchhigherbandwidth(10/100Mbps).Additionally,amobile-basedcommunicationprotocolthatfacilitatesremotemonitoringandcontrolofPLCsusingSMSmessageshasalsobeendeveloped.Theintenthereistoprovidesystemuserswithaback-upcommunicationmechanismincaseofanet

4、workfailure.Keywords:PLCTCP/IPGSMRemotemonitoring1.IntroductionTherecentgrowthofnetworkstechnologyandspeciallythewidespreadoftheInternethavepromotedthedevelopmentofdistributedmeasurementsystemsforavarietyofindustrialapplications.Thesedistributedmeasurementsystemscanbeusedint

5、hemonitoringandcontrolofvariousinstrumentsinthenetwork.AProgrammableLogicController(PLC)ismicroprocessor-basedcontrolsystemthatcanbeprogrammedtosense,activateandcontrolindustrialequipmentandthereforeincorporatesanumberofinput/outputterminalsforinterfacingtoanindustrialproces

6、s.AcontrolprogramstoredinthePLCmemorydeterminestherelationshipbetweentheinputsandoutputsofthePLC.PLCsareintelligentautomationstationsthatpossesshighlyusefulanddesirablefeaturessuchas:•Robustness.•Highdegreeofscalability:modernPLCfamilieshaveawidespectrumofCPUtypesthatallowse

7、asyscalabilityinfunctionalityandperformance.•Extensibility:themodulardesignofPLCsenablestheextensionwithawiderangeofdigitalandanalogI/Omodules.Also,variousintegratedtechnologymodulesareavailableforvariousapplicationareas.•Sophisticatedcommunicationcapabilities:modernPLCshave

8、communicationportsthatprovideforcentralizedordistributedconnectivity.•Power