汽车导航系统外文翻译

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1、AutomotivenavigationsystemAn automotiveavigationsystem isa satellitenavigationsystem designedforusein automobiles.IttypicallyusesaGPSnavigationdevice toacquirepositiondatatolocatetheuserona road intheunit'smap database.Usingtheroaddatabase,theunitcangivedirectionstootherloca

2、tionsalongroadsalsoinitsdatabase. Deadreckoning usingdistancedatafromsensorsattachedtothe drivetrain,a gyroscope andan accelerometer canbeusedforgreaterreliability,asGPSsignallossand/or multipath canoccurdueto urbancanyons or tunnels.Somesortscanbetakenoutofthecarandusedhand

3、-heldwhilewalking.HistoryAutomotivenavigationsystemswerethesubjectofextensiveexperimentation,includingsomeeffortstoreachmassmarkets,priortotheavailabilityofcommercialGPS.Mostmajortechnologiesrequiredformodernautomobilenavigationwerealreadyestablishedwhenthemicroprocessoremer

4、gedinthe1970stosupporttheirintegrationandenhancementbycomputersoftware.Thesetechnologiessubsequentlyunderwentextensiverefinement,andavarietyofsystemarchitectureshadbeenexploredbythetimepracticalsystemsreachedthemarketinthelate1980s.Amongtheotherenhancementsofthe1980swasthede

5、velopmentofcolordisplaysfordigitalmapsandofCD-ROMsfordigitalmapstorage.However,thereissomequestionaboutwhomadethefirst commerciallyavailable automotivenavigationsystem.Thereseemstobelittleroomfordoubt thatEtak wasfirsttomakeavailableadigitalsystemthatusedmap-matchingtoimprov

6、eon deadreckoning instrumentation.Etak'ssystems,whichaccesseddigitalmapinformationstoredonstandardcassettetapes,arguablymadecarnavigationsystemspracticalforthefirsttime.[2] However,JapaneseeffortsonbothdigitalandanalogsystemspredateEtak'sfounding.StevenLobbezoo developedthef

7、irstcommerciallyavailablesatellitenavigationsystemforcars.ItwasproducedinBerlinfromstart1984toJanuary1986.PubliclypresentedfirstattheHannoverfairin1985inGermany,thesystemwasshowninoperationontheeveningnewsfromthefirstGermantelevisionchannelinthatyear.ItusedamodifiedIBMPC,ala

8、rgediscformapdataandaflatscreen,builtintotheglovecompartment.ItwascalledHom