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当前位置:首页 > 临时分类 > 城市公交车无线自动报站系统外文文献原稿和译文
Thebusstopssystemautomatically1、ThebusisautomaticallystopsthebackgroundandsignificanceThepeopleofcaroutforprovidesconvenientservice,whilethebusstopsdirectlyaffectthequalityoftheservice.Traditionalstopsbythecrewartificially,andinthiswaybecauseofitspoorandworkingintensityeffectistoogreat,inmanybigcitieshavebeeneliminated.Inrecentyears,withthedevelopmentofscienceandtechnologyprogressandmicrocomputertechnologyinmanyfieldshasbeenwidelyused.Intheacousticfield,withvariouspronunciationchipmicrocomputertechnology,cancompletecombinedspeechsynthesistechnology,makesthecarstopscontrollerisrealizedforcitizensbecomespossible,andthusprovideamorepersonalizedservice.Inviewofthetraditionalbusstopssystemdeficiency,combinedwiththeuseofpublictransportvehiclecharacteristicsandpracticaloperatingenvironment,thedesignofasingle-chipmicrocomputercontrolbusstopssystemautomatically.Thebusstopsthedesignofautomaticdeviceismainlytocompensateforchangingthetraditionalvoicestopsdevicemusthavedrivercontrolcanworkbackwardway,pitted,automaticstationbroadcastssix-foot-tallservicetermforthepublicandprovidemorehumanizedmoreperfectservice.2.ThesystemdesignofeachcomponentThissystemisdesignedhardwarecircuitdesignpart:useAT89C51ascontroller,throughISD4004pronunciationchipestablishspeech,formingavarietyofinformationandusethevoicemessagesbroadcastspeechinformationandtipsamplifier,andusingspeech,LEDdigitaldisplayforstandingcount.Whenthebusarrivedatonesite,usethekeyboardcontrolthesystemwork,throughtheyukonvoicecircuitsoutputspeechinformationandtips,stoodinseveralinformationLEDdigitaltubedisplay.Thewholesystemhardwaredesignincludingkeyboardcircuitandresetcircuit,displaydrivercircuit,displaycircuit,memoryexpansioncircuitmodule.Inordertorealizethebusstops,namelyinspeechautomaticsix-foot-tall;andwhenvoicepromptinformationandautomaticreportingserviceterm,whileutilizingofLEDdotmatrixcircuitChinesedisplaying.ThisdesignisrequiredtoexploittheAT89C51asthemastercontrolcircuitdesignofchips,auxiliarycircuitrequirementsincludingvoicecircuits,Chinesedotmatrixdisplaycircuit,thepowersupplycircuit,etc.TheCPUcontrolandcontrolsignals,pronunciationchip,outputindicatorlightcomponent.Thebusstationisautomaticallystopsthecarwheeldesign,tocountthepulseAngle,willcountvaluecomparedwithpresetvalue,candeterminemoments,attainthepreciseautomaticallystopsthepurpose.USESAT89C51asmaincontrolchip,combiningtoforeignpulsecountISD4004outputvoicepronunciationchip.Systemconsistsofpulsedetection,pulsecount,CPUcontrolandcontrolsignals,pronunciationchip,outputindicatorlightcomponent.AboutAT89C51chip:AT89C51itmainlyconsistsofforthefollowingparts:1eightcentralprocessingunit(CPU),pieceyouinmemory,thepieces(FlashRAM,4of8bitstwo-wayaddressableI/Oport,1full-duplexUART(generalasynchronousreceivertransmitter)serialinterface,216timer/counters,multipleprioritynestedinterruptstructure,andapieceinsideoscillatorandclockcircuit.InAT89C51structure,themoststrikingcharacteristicsofinternalcontainsFlashmemoryis,whileinotheraspectsofthestructureoftheIntelcorporation,theandthestructureofthe8051nomuchdifference.Mainperformance:1.WithMCS-51compatible2.4KbytesprogrammableflashingmemoryLifeexpectancy:1000timestowrite/wipecycleDataretentiontime:10years3.Allthestaticjob:0Hz-24Hz4.Tertiaryprogrammemorylock5.128*8bitsinside6.32programmableI/Olines7.Two16timers,counter8.Fiveinterruptsource9.Programmableserialchannels10.SliceclockcircuitoscillatorandwithinThedesignofpulsedetectioncircuit:Thedesignofthekeyisthattherotorturnlapcount,consideringthevehicleswillberunninginacomplexenvironment,andthehallcomponetsareresistanttovibrate,afraidofdust,grease,watervaporandsaltfogtheadvantagesofthepollutionorcorrosion,soadoptreliablehallelementDN6848assignalacquisitiondevice,againbyphotoelectriccouplers4N25inputtomicrocontroller.Photoelectriccouplercurrenttransmission10%~25%,thanforlessthan10usresponsetime.AboutspeechoutputcircuitdesignThisseriesofchiprequiredbythemicroprocessorormicrocontrollerseriesthroughserialperipheralinterfacesandserialinterfaceaddressingandcontrol.TherecordingdataisstoredmethodofmultistagestorageisthroughISDpatenttechnologyimplementation,withsoundandaudiosignalsdirectlyinthenaturalformofsolidstatememory,thusprovidinghighqualityreplaythefidelityofspeech.ISD4004voicerecordingdevicesfor6.4kHZsamplingfrequency,timeandrecordingasinglechip8points,10points,12points,16pointsseveral,anditsuseofbuilt-inFLASHmemorycostnonvolatileCaXiememory,thisfastdata,anditisnotlostpowersavedatadepartmentneedspowerconsumption.Thetypicalstoredinformationcansavetimeupto100years,thesamestorageunitcanberepeatedberecorded10milliontimes.IAD4004chipaudiooutputpincandriveafivethousanduefaload,whendeviceafterpowerup,changethepoweroutputpinsfor1.2v.tothisdesignofchosenamplifierisLM386isforlowvoltageapplicationdesignaudioamplifier,theworkingvoltageof6V,maximumdistortiondegreeof0.2,powerfrequencyresponseto20~100KHZAboutLEDdisplayoutputdesign:ThiscircuitUSES16*256destemtodisplay1616*16Chinesecharacters,usingthevideomemoryU14todepositthecharactersbitmapinfor
本文标题:城市公交车无线自动报站系统外文文献原稿和译文
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