基于LIN总线的汽车智能雨刷设计外文文献翻译中英文翻译外文翻译.docx

基于LIN总线的汽车智能雨刷设计外文文献翻译中英文翻译外文翻译.docx

《基于LIN总线的汽车智能雨刷设计外文文献翻译中英文翻译外文翻译.docx》由会员分享，可在线阅读，更多相关《基于LIN总线的汽车智能雨刷设计外文文献翻译中英文翻译外文翻译.docx（10页珍藏版）》请在冰豆网上搜索。

基于LIN总线的汽车智能雨刷设计外文文献翻译中英文翻译外文翻译

外文文献及译文

文献、资料题目：

DesignandImplementationIntelligent

CarWiperBasedonLINBus

文献、资料来源：

TransTech期刊

文献、资料发表（出版）日期：

2012年04月12日

学生姓名：

学号：

系别：

专业：

指导教师：

职称：

2017年5月19日

DesignandImplementationintelligentcarwiperbasedonLINBus

Abstract：

Contrarytotheproblemthattheprocessofrainycarmanualmanipulationcausesmuchinterferencetothedriver,adesignmethodforintelligentcarwiperbasedontheLINbusisproposed.ItadoptsthechipsMC9S08DZ60andMC33661asthecontrollerfromFreescalethatdedicatedtotheautomotiveelectronicsfield.Duringitsworking,withtherainsensorsensingthemagnitudeofoutsiderainfall,itcanautomaticallyadjustthewiperspeed,achievingtheintelligentwipercontrol.

Keywords:

Rainwipercontrol,LINbus,Intelligent,Freescale.

Introduction

Thenumberofwiringharnessesisincreasingatthedoublespeedbythegrowinginthequantityofautomotiveelectroniccomponents.Theincreasingofwiringharnessoccupiestheinterioreffectivespaceandenlargesthecostofvehicle.Ontheotherhand,itimpedestheimprovementofvehiclereliability.LINbus,asalow-costserialbustechnologymeetingtherequirementsofcarbodyelectronics,canprovidealow-costandshort-distancenetworkconnectionforelectricmachines,switches,sensorsandlight[1].

Asanimportantpartoftheelectronicautomotivevehicle,carwiperplaysaparticularlyimportantroleintherainandfogweather.Atpresent,theautomobilewipercontrolsysteminthemarketmainlyadjustswiperspeedthroughmanually.Themanualadjustmentwillnotonlycausesomeinterferencetothedriver'senergybutalsocannotpromptlyrespondtothesuddenincidentsuchasrainsplashingonthewindshield,increasingtheaccidentprobability.Therefore,it’sespeciallyimportanttoinstalltheintelligentcarwiperonthecarbody.

Basedontheaboveintroduction,thetextdesignsandimplementsanintelligentcarwiperbasedontheLINbus.WeselecttheFreescalechipMC9S08DZ60andMC33661asthecontrollertocompletethehardwaredesignandcommunicatewiththerainfallmonitoringdevicesorcentralcontrollerthroughtheLINbus.ItsoverallblockdiagramcanbeseeninFigure1.

Fig.1Theoverallblockdiagramofintelligentcarwiper

LINbusprotocol

ProtocolOverview：

LINbusnetworkconsistsofamasternodeandseveralslavenodes.Eachnodecontainsasecondarycommunicationtaskdecomposedtothetaskofsendingandreceiving.Themasternodealsocontainsanadditionalmajorsendingtask.TheLINbuscommunicationisusuallycomposedoftheresponsesgeneratedbythemasternode,namelythemaintaskandthesecondarytask[2].

ThereareseveralmainfeaturesintheLINprotocol.First,it’sinlowcostandcarriedoutbasedonthecommonSCI/UARTinterface.Secondly,itusesthemodeofonemasterandseveralslaves.Thedatapriorityisdeterminedbythemasternodeandcanbechangedflexiblyaccordingtotheneed.Lastly,thedelaytimeofsignaltransmissioncanbeensured.Thehighesttransferratecanreachupto20kb/sanditslargestbuslengthis40m.

MessageFrameStructure：

TheformationofmessageframefromLINbusincludestheheaderandtheresponse.Theheaderismadeupofinterrupt,synchronizationandprotectedidentifier.Theresponseconsistsofdatafieldandchecksum,ofwhichthedatafieldincludesonetoeightdatabytes.Alltheotherfieldsinthemessageframeexceptinterruptfollowthebyteandcanbegeneratedbytheserialcommunicationinterfaceofmicrocontroller.

Hardwaredesignandachievement

ThisdesignusesthemicrochipMC9S08DZ60asthemainchipandispoweredbytheMC3388.ThemainchipconnectswiththewipercontrollerMC33486throughI/Oportstocontroltherotatingdirectionandspeedofthewiperelectricmachine.ThesensorKM241asthedetectingdeviceofwipermachinegetsitsspeedandpositionandsendstothemicrocontrollerbyADports.Meanwhile,itcommunicateswithrainfallmonitoringdeviceandMCUmodulethroughtheLINcontrollerMC33661[3].TheoverallcircuitisshowninFigure2.

Fig.2Theoverallschematicofintelligentcarwiper

MCUmodule：

AsshowninFigure2,weselecttheFreescalechipMC9S08DZ60asthemicrocontroller.Itis8-bitmicrochipinhigherintegrationandpowerfulfunctionspeciallydesignedfortheautomobilefield,providingtheFreescaleembeddedCAN,EEPROMandon-chipemulation/debugmoduleinthelowestcost.Thechiphasaninternalflashmemoryof60K,RAMmemoryof2KandE2PROMmemoryof1K.MC9S08DZ60cancommunicatewithperipheralintelligentchipusingSPImoduleofwhichtheSCImodulecanachievetheLINbuscommunication[4].

Powermodule：

Thepowermoduleisthedevicethatprovidesvoltageconversiontowipercontroller.Thevoltageofpowersupplyinthecarbatteryis12VDCwhiletheMCU,LINtransceiverandHallsensorarethepowersupplydevicein5V,therefore,thepowermoduleneedstoconvert12Vto5Vandsupplytothem.

ThechipMC33889：

isselectedforthepowermanagement.Itcanworkinthecarultimateapplicationrangeof-40℃to125℃withCANphysicallayerandvoltagestabilization.Ithasinternalwatchdogtimerandlocalwake-upcircuitprovidingMCUastable5Voperatingvoltage.Inaddition,itsintegrateddesignreducespackagingcostandincreasesthedesignflexibility.

Wiperelectricmodule：

WiperelectricmoduleworkswiththePWMoutputbymicrocontrollergoingwithintelligentpowercomponentstoadjustthespeedofelectricmachineanddrivetheforwardandreverserotationofwipermachine.Moreover,itcanmakeappropriateresponsetotheconditionwhetherthemachinewasblocked.

WipercontrolmoduleadoptsMC33486tobethecontrollerofwhichthestableoutputisupto10A,especiallymeetingthecontrolrequirementsinpositiveandinversephasedemandinghighpowerandimpactcurrentsuchastheelectricwindowmachine,wipermachineandsoon.Intheregulationforwipermachine,twodifferentpoweroutputmodulesrespectivelycontrolthecoilofwiperelectricmachineinhighandlowspeed.

Detectingdeviceforwipermachine：

Intelligentcarwiperneedtomakereal-timemonitorandcontroltowiperrotationsothatit’snecessarytomonitorthestatusofwipermachinesuchasposition,speed,temperatureandsoon.ThesystemselectstheHallsensorKMZ41toworkwiththemicrochipsothattheanglesignalwithintherangeof180°canbemeasured.Afterdetectingthepositionofwipermachine,themicrocontrollerwilldeterminewhethercurrentpositioniscorrect.Ifnot,itmakestheelectricmachinerotatetothecorrectposition.Then,afterdetectingitsspeed,thesingle-chipreceivesthenumberandcomparesittogivenvaluetomakewipermachineruninthemostaccuratespeed.

Softwaredesignandachievement

Inthisdesign,weusesoftwaresimulationtoachievetheintermittentoperationofwipermachine.Timing3sbythesystemtimer,theMCUoutputschipselectionsignalsofwipermachinetoMC33486.Then,thegearjudgeisenteredandthecorrespondingswitchvariablesarereadtocarryoutthewiperoperation.

Softwaredesignofwipermachine：

Whenthemicrocontrollerdetectstheconditionthatwiperswitchispressed,itwilljudgethegearandenableMC33486tocompletethecorrespondingwipercontroloperationsaccordingtodifferentgears.First,itdeterminesthegearandcarriesouterrordetectionaswellasmarkingtheerrorcountingvariable.Ifeverythingisnormal,theappropriateactionwillbetaken.ThetotalflowofsoftwaredesignisshowninFigure3.

Fig.3Thetotalflowchartofsoftwaredesignforwipermachine

LINdriveandsoftwaredesignofthewipersystem：

AccordingtotheLIN2.Xspecification,themastercontrolnodesendsLINmessagesandtheslavenodesfeedbackthem.Onlywhenreceivingthequeryframefromthemasternodecouldtheslavenodesendfeedbackframetothemasternode.

LINcommunicationneedtoconfiguretwofiles:

".id"and".cfg".The".id"filedefinestheIDsettings,includingthereceivingandsendingdirectionofIDandframelength.The".cfg"documentmainlydefinesthebaudrate,clock,andbittimeofSCIcommunication.Configuredwiththesetwofiles,theregisterdefinitionin"regs.h”fileneedtobemodifiedtoenabletheregisteraddresstocorrectlymaponDZ60andsettheinterruptvector.

Afterconfiguringtheaboveconditions,thedatasendingcanbeachievedbythestepsshowninFigure4.Figure5istheflowchartofdatareceivinginthemasternode.Totheslavenode,theLIN_MsgStatus（MsgId）shouldbecalledanddeterminewhetherthedataunderIDisLIN_OK.Ifthereisdata,theIDdatainthebuffercanbetransferredto*datawhichisdefinedbyuserbycallingLIN_GetMsg（MsgId,*data）.

Fig.5Datareceptionflowchartofmasternode

Fig.4Datasending

Conclusion

Contrarytothedisadvantagesoftheexistingwipercontrolsystem,thetextproposesanintelligentcarwipercontrolsystembasedonLINbus.ItcancontrolthespeedofwipermachinebasedonrainfallinformationandachievethecommunicationbetweenwipercontrollerandECUthroughtheLINbus,makingthewiperintelligent.Inaddition,theextensiveapplicationofLINbusintheautomobilefieldencouragesmoredevicessupportingLINprotocoltobeproduced.AfterdoingsomemodificationstoMC9S08DZ60,thesystemcanachievethedatatransmissionwithotherautomobiledevices,increasingthedesignflexibility.

Acknowledgment

ThispaperissupportedbyTianjinSocialDevelopmentkeyFoundationofChina（NO.09ZCGYSF00300）andTianjinKeyLaboratoryforControlTheoryandApplicationinComplicatedSystems,TianjinUniversityofTechnology,Tianjin300384,China.

References

[1]