会员注册 | 登录 | 微信快捷登录 支付宝快捷登录 QQ登录 微博登录 | 帮助中心 人人文库renrendoc.com美如初恋!
站内搜索 百度文库

热门搜索: 直缝焊接机 矿井提升机 循环球式转向器图纸 机器人手爪发展史 管道机器人dwg 动平衡试验台设计

外文翻译--基于嵌入式实时操作系统的工程机械智能显示仪的研究 英文版【优秀】.pdf外文翻译--基于嵌入式实时操作系统的工程机械智能显示仪的研究 英文版【优秀】.pdf -- 10 元

宽屏显示 收藏 分享

资源预览需要最新版本的Flash Player支持。
您尚未安装或版本过低,建议您

TheEighthInternationalConferenceonElectronicMeasurementandInstrumentsICEMI2007ResearchontheIntelligentDisplayInstrumentforConstructionMachineryBasedonEmbeddedRTOSXuChuanpeiLiZhiHuCongWangWeiÄDept.ofElectronicEngineeringGuiLinUniversityofElectronicTechnology,Guilin,541004ChinaAbstractTakingtheintelligentwheelloaderasaninstance,thispaperresearchesontheintelligentdisplayinstrumentforConstructionMachinerybasedonembeddedRTOS.AstructureofembeddedsystembasedonRTOSisproposed,anddesignsofboththehardwareandsoftwarearecompleted.ThesystemtakestheTMS320LF2407AchipoftheTIasthehardwareplatform,andtherealtimeoperatesystemofC/OSasthesoftwareplatformcompletesrealtimemonitoringandmanagementoftheconstructionmachinerybytheCANbuscommunicatingwiththemaincontroller.KeywordsEmbeddedSystemC/OSTMS320LF2407ACANBusDisplayInstrument1IntroductionTheconstructionmachinerydisplayinstrumentistheimportantinterfacebetweenthedriverandtheconstructionmachinerytocommunicateinformation,whichplaysavitalroletotheconstructionmachinerysecurityandtheeconomy.Inrecentyears,alongwiththeconstructionmachineryelectronictechnologydevelopment,theinformationwhichdisplayedontheconstructionmachineryinstrumentisunceasinglyincreasing.Thetraditionalmechanicalindicatorforconstructionmachinerycombinationinstrumentismoreandmoreunabletomeettheactualneeds.Particularly,withthecomputer,themicroelectronanddifferentkindsoffieldbuscommunicationbecomewidespreadapplications,takingtheembeddedmicroprocessorasthecoreintelligentdigitaldisplayinstrumentwouldbeaninevitabletrendfortheconstructionmachineryinstrumentdevelopment.Thispapercombinestherealtimeembeddedtechnology,theCANbustechnology,thetouchscreentechnologyandtheGPSpositiontechnologytogethertoapplytotheconstructionmachineryLCDmonitor,withthewheeledloaderastheresearchobject,andresearchesontheintelligentdisplayinstrumentforconstructionmachinery.2SystemArchitectureThearchitectureoftheonboardintelligentdisplayinstrumentsystemiscomposedofthepowersourcemodule,theDSPmodule,theLCDmodule,themechanicalkeyboardmodule,thetouchscreenmodule,theGPSorientationmodule,theADsupplementallightingsamplemodule,theCANcommunicationinterfacemoduleandthesoundalarmingmodulesetc.,whichareshownasfigure1.TMS320LF2407AControllerµC/OSIIRTOSPowersourcemoduleADmoduleSupplylightingsampleMechanicalkeyboardmoduleCANmoduleWheeledloadermaincontrollerSCImoduleGPSPositionmoduleLCDDisplayTouch3.3V5VlevelisolateTurninglampsampleOptoisolateTurningcontrolSoundalarmingmodulesFig.1IntelligentDisplayInstrumentSystemArchitectureThepowersourcemoduledealswiththevehicle24Vpowersourcewiththefilterconditionsremovesthepossiblenoises,outputsforthemaincontrollermoduleandtheLCD.Thepowersourceis48241424411351/07/25.00©2007IEEE.AuthorizedlicenseduselimitedtoJILINUNIVERSITY.DownloadedonDecember17,2008at0608fromIEEEXplore.Restrictionsapply.TheEighthInternationalConferenceonElectronicMeasurementandInstrumentsICEMI2007transformedto3.3Vand5VconstantvoltagesupplypowerforothermodulesintheLCD.TheDSPmoduleincludsTMS320LF2407Achip,extendprogramanddatamemory,resetchipetc.,whichisthehardwareplatformofthisembeddedrealtimeoperatingsystem.TheLCDdisplaymoduleisthehumanmachineinterfaceusedfordisplayingallkindsofstatusinformationofthewheeledloaderwhichistransmittedthroughtheCANbus.Themechanicalkeyboardandthetouchscreenaretheinstrumentstoachievetheoperatorcontrollingandmonitoringwheeledloaderwithallkindofstatusintime.TheGPSpositionmoduletransmitsthewheeledloadergeographicalpositioninformationtothedisplayinstrumentaboutthewheeledloaderthroughtheSCI.Thedisplayinstrumenttransmitstheinformationtothemaincontrollerforprocessingontime.Consequently,thelongdistancesupervisorcentercanrealtimequerythewheeledloadersworkingpositionbytheGPRSwirelessnetwork.Whenthelighteningofthewheeledloadersworkingenvironmentisinsufficient,theADsupplementallightingsamplemoduleautomaticallyopensasupplementallighttostrengthenthebrightness,whichisconvenientforoperatorcontrolling.TheCANbusmoduleisthekeyforthedisplayinstrumentandthewheeledloadermaincontrollercommunication.ThedisplayinstrumentcouldgetallkindsofoperationalparametersandthedataoftheentirewheeledloaderonlythroughtheCANcommunication,andcouldcontrolthewheeledloadertocarryonthecorrespondingfunctionaloperations,whichisakeypositiontoconnectthedisplayinstrumentandthemaincontroller.Whenthewheeledloaderworkswithsomefaults,thedisplayinstrumentcouldpromptalarmsbythespeechalarmingmodule,whichcouldinformtheoperatorimmediatelytocarryonprocessingtothesefaults,thusmayavoidgreateconomicloss.TheembeddedsystemsoftwareachievestointelligentLCDmonitoronthewheeledloaderandinteractdatawiththewheeledloadermaincontrollerbasedonthisplatformofhardwarefunctionmodule.3SystemHardwareDesignThedisplayinstrumentisresponsiblefordisplaying,monitoring,processingandcontrollingofallkindsofparametersofthewheeledloadermaincontrollerwhicharereceivedfromtheCANinterface.Accordingtothefunctionsoftheintelligentdisplay,itcanbedividedintofollowingmodulecircuitstodesign1TheprocessorofTMS320LF2407AmaincircuitincludestheCANinterface2Keystrokegatheringcircuit3Touchscreenmodule4Powersourceprocessingmodule5GPSpositionmodule6Liquidcrystalinterfacecontrolcircuit7Speechchipcontrolcircuit8Distinctionchangescircuitetc.Theschematicsystemhardwareisshownasfigure2.TMS320LF2407AextendprogramanddatamemoryAddBusDataBuswheeledloadermaincontrollerCANLevelisolation74LVTH245LCDTouchIOGPSSCIMechanicalKeysSupplementallightingturninglampsampleADCoptocouplerSCICANIOADC1IOPOWERFig.2SchematicsystemhardwarecircuitAccordingtothesystemhardwareplatform,dividetheresourcesontheplanofthemicroprocessorDSPLF2407A11channelADinput,usestheonchipADCmoduleADC1212mechanicalkeystrokesampling,achieveswithIOPE0IOPE7andXINT132channelswitchinputsleftrightturnsignallamp,usestwoIOport4CommunicationwithGPSusingonchipSCImodule5CANbusinterface,usingonchipCANcontroller6ControlofthespeechchipwiththeIOport4825AuthorizedlicenseduselimitedtoJILINUNIVERSITY.DownloadedonDecember17,2008at0608fromIEEEXplore.Restrictionsapply.TheEighthInternationalConferenceonElectronicMeasurementandInstrumentsICEMI20077ThedatamemoryandtheprogrammemoryextendinterfaceD0D15,A0A158TheJTAGsimulationinterface,thecrystaloscillatorclockinput,resetsignal,thepowersourcepinetc.BecausetheTMS320LF2407Aworkson3.3Vvoltage,inordertoavoidleveltransforming,thesystemusestwopiecesofCY7C1021CV33chipswhichmadeinCypressCorporationtoexpandsystemexternalmemoryspace.CY7C1021CV33isoneofthe64Kbyte,16bitstaticRAM,3.3Vpowersupply.InordertoadapttheDSPofTMS320LF2407A3.3Vworkingvoltageandsatisfythelowpowerconsumptionfeatures,SN65HVD232isselectedforCANbustransceiverofTICorporation.ItisonekindofCANbusdevicewith3.3V/5Vmixedvoltage.Thistransceiverfeaturesasflowsthesignaltransferratecanachieve1Mbpssignaldistanceis40m,andquitelowmaintenancecurrent.Thusitusesforquiteideallylowpowerconsumption.InthedesignusingthisCANbustransceivertocommunicatebetweenthedisplayinstrumentandthemaincontrollerofintelligentwheelloader.Inthedesign,consideringthatitmustcontrolandprocesstheheadandtailrainwiper,theheadandtaillamp,thefrontheadlamp,thesprayingofwater,thesmalllamp,theworkpump,theparking,thenamelysentinformation,thealarminformation,themenuoperationofthewheelloaderetc.,12mechanicalkeystrokearedesignedinthissystemactingasmanmachineinteractionmethodforthedisplayinstrumentandthewheelloadermaincontrol.Aftertheoverallevaluation,CM3202407SLYBofShenzhenBrilliantCrystalTechnologyCO.LTDisselectedfortheliquidcrystalmodule.ItisasectionproperattentiontobothChineseandEnglishwritingandthecartographypatternspotmatrixliquidcrystaldisplaymodule,thebluecolorbacklight,includebuildin512KBytetheROMglyphcode,candisplayChinesecharacter,numericcharacter,Englishletter,Japaneseletter,Europeanletteretc.,andincludesbuildinTwoPagedisplaymemory.Inthecharacterpattern,itcanreceivethestandardChinesecharacterencodingtodisplayChinesedirectly,butdoesnotneedtoenterthecartographypatterntodepictChinese.Itcancutmuchmicroprocessortime,promoteliquidcrystaldisplayChineseefficiently.Itsupports4/8of6800/8080MCUinterface,includebuildin88keyboardscanningKeyScan,supportscreenrollsuphorizontallyandrollsupvertically,insidesitconstructs512ByteSRAMtobepossibletomakethecharactercustom,providetheChineseandEnglishcharacteralignandinside10BitADCsupporttouchscreenapplication.Becauseofthoseadvantages,soweusedtheRA8803withitstouchscreenfunctionforthetouchscreenfunctionprograminthedesigns.WhentheprocessorofLF2407Aworksin40MHz,itcanresultintimingconfusionbecausetheRA8803workingfrequencycannotfollowDSPworkingfrequencybyfar.Consideringtheabovefactor,IOPBofDSPisselectedasthedatalineconnecttoLCDdataportDB0DB7,usingIOofIOPFastheLCDtimingcontrolwiretooperatetheliquidcrystal.Althoughitsspeedisslow,itcanguaranteethesystemwithstability.4SoftwareDesignoftheSystemThetaskdivisionandthepriorityassignmentarebasedonthefunctionrequirements.ThefunctionsofthedisplayinstrumentrequiredaregivenasfollowsItshouldgainthereal7timedata,faultinformation,remindingmessages,shortmessagesbycommunicatingwiththemaincontrollerofthewheelloader,andthendisplayonLCD8Sampleskeystrokeofmechanicalkeyboardcontrolsthemaincontrollertocarryonthecorrespondingoperationthroughdifferentkeystrokeinformation.9OnechannelADsample.SamplesonechannelanalogvaluethroughtheDSPADCfunction,thatistosay,itcarriesonmakinguplightgatheringwheninsidecablightisinsufficient,thelightlampisturnedonautomaticallyTouchscreeninformationgathering.Thetouchscreenfunction,insteadofthemechanicalkeyboard,canfacilitatethedrivermuchbetterto4826AuthorizedlicenseduselimitedtoJILINUNIVERSITY.DownloadedonDecember17,2008at0608fromIEEEXplore.Restrictionsapply.TheEighthInternationalConferenceonElectronicMeasurementandInstrumentsICEMI2007operating.Accordingtothewheelloaderoperatorsoperationinformation,aturningdirectionisdecided,andthenlightentheturninglampasthecorrespondingchanges.Accordingtothedriver,thecontrolcommandshouldberespectivelysenttothemaincontrollerofthewheelloaderandtheexecutivecomponentsoflight,rainblows,andbrake,thenthedisplayinstrumentshouldreadthefeedbackandjudgetheexecutingimplementationworkingconditions.ItshouldgainthelatitudeandlongitudeinformationbytheSCIcorrespondencebetweenthedisplayinstrumentandtheGPSmodule,anduploadtimingtostoretheinformationinthemaincontrolleraccordingtothedemand.Task4,systeminitializationincludesstartingthesystemclock,systeminitialization,initializationkeystrokegainingprocedure,thetouchscreenfunction,thefaultinformationpointertable,startingalarmfunction.ThedividingreasonisgivenasfollowsTheC/OSIIclockTICKinterruptiscompletedbytherealtimeclock,butthe2407chipdoesnothavethistimer,soitshouldusegeneraltimerT1tocomplete.ThefollowingtipsshouldbepaidattentionClearinterruptflagintheTICKinterrupt.7thetimershouldbestartedupinthehighestpriority8duty,ifitisstartedupbeforeOSStartstarts,thesystemwillcollapse.Thefunctionsofkeyboardsample,touchscreenandsoonaffectthelateroperationdirectly.Andthefaultinformationtablesaffectthefollowingfaultdisplaying.Ifthealarmflagisopened,itcangivethespeechalarmforthefaultofthewheelloaderatthefirsttime.Allofthesebelongtoaninitializationpart,andneedtobestartedbeforeothertasksthereforewegroupthemasawholetask.Task5,taskforCANcommunication.Ifthedisplayinstrumentnormallylinkswiththemaincontroller,itgetsallkindsofparametersofthemaincontrollerimmediately,andshowsdynamicallyonLCDafterbeingprocessed.ThedivisionreasonsareshownasbelowAccessingandupdatingtherealtimeofthemaincontrollerdataisveryimportanttotheoperators.Theoperatorsneedtogetthestatesofthemachineintime.Therefore,thecommunicationbetweentheCANbusandthemaincontrollerisessentialtothedesign,sowetakeitastheonlyinferiortasktoopeningtheclock.Task6,taskforsupplementallightingsample.FortyeightLEDswouldautomaticallyturnontohelptheoperatorsbyimprovingtheintensityoflightwhenthewheelloaderisworkingatlightinsufficientlyorinthedark.Itopensanalarmattheendofthetask.Theworkingconditionofwheelloaderisgenerallysobadthatthelightiscomparativelydim,sowetakethetask6asanindependentmoduleandgiveitprioritycomparatively.Task7,taskforkeyboarddistinguishing.Thistaskwillsamplekeystroke,andtriggerdifferentdisplayfunctionsandtasksaccordingtodifferentkeystroke.Wetakethistaskasanindependentmoduletomakemanmachineinterface.Task8,taskfortouchscreen.Thistaskissimilartothetask7.Wetakethistaskasanindependentmoduletomakemanmachineinterface.Itcantakeplaceofthetask7.Task9,taskfordistinguishingwhichturninglampisturnedon.Thisfunctioncandistinguishwhichdirectionthewheelloaderhasturnedtoandindicateacorrespondingsymbolonthetouchscreen.Wetakethistaskasanindependentmodule.Tasks13,taskofotherfunctionsexpectthemaininterfaceandtheworkpumpmonitoringinterface.Itincludescontrollinganddisplayingvariouskeystrokeofthewheelloader.Wetakethistaskasanindependentmodule.Task15,taskforinterfaceredrawing.Accordingtovariousoperations,thisfunctionmakesadecisionwhethertheinterfaceneedstobechanged.Wetakethistaskasanindependentmodule.Task16,taskforGPSdatacollecting.Itcollectsthelatitudeandlongitudeinformationofthewheelloadertimingandsendtothemaincontroller.Iftheremotemonitoringisneeded,theinformationwillbesenttotheremotemonitoringthroughthemaincontrollerbasedonGPRSifitisneeded.Andthevehiclesrealtimepositionalinformationwillbe4827AuthorizedlicenseduselimitedtoJILINUNIVERSITY.DownloadedonDecember17,2008at0608fromIEEEXplore.Restrictionsapply.
编号:201311171858007816    大小:477.45KB    格式:PDF    上传时间:2013-11-17
  【编辑】
10
关 键 词:
教育专区 外文翻译 精品文档 外文翻译
温馨提示:
1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
2: 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
3.本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 人人文库网仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
  人人文库网所有资源均是用户自行上传分享,仅供网友学习交流,未经上传用户书面授权,请勿作他用。
0条评论

还可以输入200字符

暂无评论,赶快抢占沙发吧。

当前资源信息

4.0
 
(2人评价)
浏览:31次
英文资料库上传于2013-11-17

官方联系方式

客服手机:13961746681   
2:不支持迅雷下载,请使用浏览器下载   
3:不支持QQ浏览器下载,请用其他浏览器   
4:下载后的文档和图纸-无水印   
5:文档经过压缩,下载后原文更清晰   

相关资源

相关资源

相关搜索

教育专区   外文翻译   精品文档   外文翻译  
关于我们 - 网站声明 - 网站地图 - 友情链接 - 网站客服客服 - 联系我们
copyright@ 2015-2017 人人文库网网站版权所有
苏ICP备12009002号-5