ThecontrolofElectronicCommunicationWithcomputertechnology,communicationstechnology,therapiddevelopmentofintegratedcircuittechnologytoall-digitalfieldbus-representedon-sitecontrolinstruments,equipment,alargenumberofapplications,thetraditionalsiteofthecontroltechnologyandcontrolequipmentatthescenehaschangeddramatically.Thesitewascumbersometoconnectasinglesimplefieldbusnetworkinplaceofthesystemdesignflexibility,easymaintenance,qualityofthesignaltransmissionisalsogreatlyenhanced,inordertocontroltheon-siteindustrialuserstremendousadvantages.Afteralongperiodofdevelopment,hasbecomeHart,Lonworks,Profibus,Bitbusandavarietyofon-site,suchasCANbusprotocol.Withtherapiddevelopmentofelectronictechnologyinthecarandonthewideruseofelectronicvehiclebecomingmore,especiallymicro-controllerintothecarinthefieldofcontrol,tothedevelopmentoftheautomobilehasbroughtepoch-makingchangesinthecardrivingforce,Stabilityoperations,safety,fueleconomy,environmentalfriendlinesshavebeenincreaseddramatically.Theapplicationofalargenumberofelectronicdevices,wiringbodyisboundtoleadtothemorecomplicatedthelongerruntoreducethereliability,faultrepairsdifficult.Inparticulartheelectroniccontrolunitofthelargescaleintroduction,inordertoraisetheutilizationrateofthesignal,alargenumberofrequestsforinformationinvariouselectronicunitsshared,integratedvehiclecontrolsysteminalargenumberofcontrolsignalsneedtoexchangereal-time,CambodiahasbeenfarfromthetraditionallineThiscannotmeetthedemand.Inresponsetotheseproblems,thechoiceofnetworktechnologyincomputernetworktechnologyfromthesceneandcontroltechnologyonthebasisofthedevelopmentoftheautomobileenvironmentappliestoallkindsofcarnetworkingtechnology.Andotheron-sitecontrol,thecartemperaturerange-45-100℃,electromagneticinterferenceandotherelectronicnoise-keung,environment,networkreliabilityintheoperationofthecarisespeciallyimportantthatthisnotonlyreflectedinthestructureofthenetworkitselfThefault-toleranceandanti-interferenceability,butalsointhesignalencodingandtransmissionmethods.AutomotiveLAN,withoutexception,haveadoptedaserialsynchronoustransmission,dataandthePWMsignaltheuseofNRZencoding,bitrateisusuallyhigherthanthatofNRZencodedusing100kbps,whichislowerthan100kbpsencodingusingPWM.Manywell-knowninternationalcarcompanyintheearly80''sontheactivenetworkdedicatedtoautomotivetechnologyresearchandapplication.Todate,avarietyofnetworkstandardssuchasSAE''sJ1850,Germany''spublicABUS,theBoschCAN,theAmericanBusinessMachinesAutoCAN,ISO''sVAN,suchasMazda''sPALMNET.InaccordancewithChina''sautomotiveelectronicstechnologydevelopmentplanning,intothe21stcenturycarelectronicsuptothelevelof90foreigncountries,willalsobealargenumberofintelligentelectroniccontrolunitwasintroduced.Toshortenthecarwithforeignskills,improvetheirowncompetitiveness,relyingontechnologyaloneisnotconducivetolong-termgrowth,digestion,absorption,researchanddevelopmentofitsownnetworkofautomotiveapplicationsisimperative。
黄知坤2019-11-06 15:02:51