初一关于科技的英语演讲的英语作文大约3分钟

ThecontrolofElectronicCommunication

Withcomputertechnology,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