現(xiàn)場總線儀表網(wǎng)絡的研究.pdf

1、西安電子科技大學碩士學位論文現(xiàn)場總線儀表網(wǎng)絡的研究姓名：張琪申請學位級別：碩士專業(yè)：計算機應用技術指導教師：張彤201102AbstractFieldbusisacoretechnologyofmodemindustrialautomationandcontrolsystemItmakesindustrialautonlationandcontrolsystemhaVedistributed，open，hi曲lyintelligentf

2、eaturesItalsomakesindustrialmeasurementandcontrolproductsofthedi虢renttypesa11ddi低relltmanufacturersbeeasilyconllectedItgreatlyenhallcesthee幣ciency，stabilityandad印tabilitytotheenvironmentofindustrialautom“onandcontrolsyst

3、em，andreducesthecostsignmcantlyFieldbusdevicenetworkisanessentialpanofthe療eldbussystem，itsperfoHIlanceisofgreatimportanttot11eindustrialcontrolsystemAtpresent，fieldbusisintheconditionofmulti—standardco—existingandwillbec

4、oexistenceinlong—tenn，theappIicationlayerproto‘：olsofeachinstmmentmanu矗cturers，thesystemintegratorsa11dindust巧professionshaVealotofdi銥；rences，aI：ldtheindustrialenvironmentsarealsoV撕ousThissituatiollleadstoalotofproblemss

5、tillexistinginfieldbusdevicenetworks，includecompl：tibility，networkmanagementemciency，net、vorkajltimterferenceperformaJlce，etcThisthesisworksinthef01lowingt1reeareastostudvandcopewiththesep10blems：1)Designandimplementanem

6、beddedplatfom，whichhastheabilitiesofprotI)colconVersion，computation，dataStorage，forwardingandsignalrepeatingTheplat硒rmismainlytosolvetheproblemofdatacompatibilityandproVidethesuppoIrttotheoptimizationofnetwo水scheduling2)

7、Thenetworkstmctureandschedulingmethoda1eimproved，andthestructureoffieldbusnetworkwhichbasedonfourporrts，twosetsoftwistedpairconnectionsandsubmeterrelayisdesignedAnetworkschedulingmethodofhierau∞hicalandclustermaJlagement

8、ispresent，andthesystem’sstabilityaJldspeedofthewholenetworkpatrolareimproved3)Forsomestronglyelectromagneticinterferenceenviro哪ent，adatatransfermethodwhichbasedonspreadspectrumtechn0109yisproposedThismethodcangreatlyimpr

9、ovenoiseimmunity、vhileredueesthetr觚smissionratelessInthisthesis，weVerifythevalidityofembeddedplatfomldesignedthroughtheapplication，aJldVerilIythee仃ectiVenessoftheproposednetworkstmcture，scheduling，anddatatr觚sfe玎ingthough