汽車導(dǎo)航系統(tǒng)外文翻譯

1、automotive navigation systemanautomotive avigation systemis asatellite navigation systemdesigned for use inautomobiles. it typically uses a gps navigation deviceto acquire position data to locate the user on aroadin the units mapdatabase. using the road database, the unit can give directions to othe

2、r locations along roads also in its database.dead reckoningusing distance data from sensors attached to thedrivetrain, agyroscopeand anaccelerometercan be used for greater reliability, as gps signal loss and/ormultipathcan occur due tourban canyonsortunnels.some sorts can be taken out of the car and

3、 used hand-held while walking.historyautomotive navigation systems were the subject of extensive experimentation, including some efforts to reach mass markets, prior to the availability of commercialgps.most major technologies required for modern automobile navigation were already established when t

4、he microprocessor emerged in the 1970s to support their integration and enhancement by computer software. these technologies subsequently underwent extensive refinement, and a variety of system architectures had been explored by the time practical systems reached the market in the late 1980s. among

5、the other enhancements of the 1980s was the development of color displays for digital maps and of cd-roms for digital map storage.however, there is some question about who made the firstcommercially availableautomotive navigation system. there seems to be little room for doubtthat etakwas first to m

6、ake available a digital system that used map-matching to improve ondead reckoninginstrumentation. etaks systems, which accessed digital map information stored on standard cassette tapes, arguably made car navigation systems practical for the first time.2however, japanese efforts on both digital and

7、analog systems predate etaks founding.steven lobbezoodeveloped the first commercially available satellite navigation system for cars. it was produced in berlin from start 1984 to january 1986. publicly presented first at the hannover fair in 1985 in germany, the system was shown in operation on the

8、evening news from the first german television channel in that year. it used a modified ibm pc, a large disc for map data and a flat screen, built into the glove compartment. it was called homer alpineclaims to have created the first automotive navigation system in 1981. however, according to the com

9、panys own historical timeline,3the company claims to haveco-developed an analog automotive navigation product called theelectro gyrocator, working withhonda. this engineering effort was abandoned in 1985. although there are reports of the electro gyrocator being offered as a dealer option on the hon

10、da accord in 1981, its not clear whether an actual product was released, whether any customers took delivery of an electro gyrocator-equipped accord, or even whether the unit appeared in any dealer showrooms; hondas own official history appears to pronounce the electro gyrocator as not practical. ho

11、ndaclaims4to have created the first navigation system starting in 1983, and culminating with general availability in the 1990acura legend. the originalanalogelectro gyrocator system used anaccelerometerto navigate usinginertial navigation, as thegpssystem was not yet generally available. however, it

12、 appears from hondas concessions in their own account of the electro gyrocator project that etak actually trumped hondas analog effort with a truly practical digital system, albeit one whose effective range of operation was limited by the availability of appropriately digitized street map data.techn

13、ologyvisualizationnavigation systems may (or may not) use a combination of any of the following: top view for the map top view for the map with the map rotating with the automobile (so that up on the map always corresponds to forward in the vehicle) birds-eye viewfor the map or the next curve linear

14、 gauge for distance, which is redundant if a rotating map is used numbers for distance schematic pictograms voice promptsroad databasecontentsthe road database is avector mapof some area of interest. street names or numbers and house numbers are encoded asgeographic coordinatesso that the user can f

15、ind some desired destination by street address .points of interestwill also be stored with their geographic coordinates. point of interest specialties includespeed cameras,fuel stations, publicparking, and parked here.contents can be produced by the user base as their cars drive along existing stree

16、ts and communicating via the internet, yielding a free and up-to-date map.physical storage formatthe physical storage format (psf) initiative is an industry grouping of car manufacturers, navigation system suppliers and map data suppliers whose objective is the standardization of the data format use

17、d in car navigation systems, as well as allow a map update capability. standardization would improve interoperability, specifically by allowing the same navigation maps to be used in navigation systems from 19 manufacturers.companies involved includebmw,volkswagen,daimler,renault, adit,aisin aw,alpi

18、ne electronics,navigon,bosch,denso,mitsubishi, harman becker,panasonic, ptv,continental ag,clarion,navteq,tele atlasand zenrin.mediathe road database may be stored insolid state read-only memory (rom), optical media (cdordvd), solid stateflash memory, magnetic media (hard disk), or a combination. a

19、common scheme is to have abase mappermanently stored in rom that can be augmented with detailed information for a region the user is interested in. a rom is always programmed at the factory; the other media may be preprogrammed,downloadedfrom acdordvdvia acomputerorwirelessconnection (bluetooth,wi-f

20、i), or directly used utilizing acard reader.some navigation device makers provide free map updates for their customers. these updates are often obtained from the vendors website, which is accessed by connecting the navigation device to a pc.汽車導(dǎo)航系統(tǒng)汽車導(dǎo)航系統(tǒng)是一個設(shè)計供汽車使用的衛(wèi)星導(dǎo)航系統(tǒng)。它通常使用一個gps導(dǎo)航設(shè)備獲取定位數(shù)據(jù)在單位的地圖數(shù)據(jù)庫

21、來找到道路上的用戶。使用道路數(shù)據(jù)庫，系統(tǒng)也可以使用這個數(shù)據(jù)庫給沿公路的其他地點(diǎn)指點(diǎn)方向。在其數(shù)據(jù)庫中。因?yàn)槌鞘袓{谷或隧道可能會導(dǎo)致gps信號丟失和/或多重路徑，這時使用來自連接到傳動系統(tǒng)的傳感器發(fā)出遠(yuǎn)程信號的航位推算和一個陀螺儀、加速計可以提高可靠性。 一些種類可以從汽車上拿下來，走路時拿在手中使用。.歷史汽車導(dǎo)航系統(tǒng)是廣泛的實(shí)驗(yàn)的產(chǎn)物，包括一些達(dá)到大眾市場的努力，以前商用gps的可用性。當(dāng)二十世紀(jì)七十年代通過電腦軟件支持他們的集成和增強(qiáng)的微處理器出現(xiàn)時，運(yùn)用到現(xiàn)代汽車導(dǎo)航的大多數(shù)主要技術(shù)已經(jīng)建立了。這些技術(shù)隨后進(jìn)行了廣泛的細(xì)化，并在20世紀(jì)80年代末通過時間探索多種系統(tǒng)產(chǎn)生的許多建筑系統(tǒng)到達(dá)

22、了市場。在20世紀(jì)80年代的其他增強(qiáng)的數(shù)字地圖是彩色顯示器和cd-rom的數(shù)字地圖存儲的發(fā)展。然而,到底是誰發(fā)明了第一個商用汽車導(dǎo)航系統(tǒng)仍存在一些質(zhì)疑。etak通過地圖匹配來提高航位推算精確度數(shù)字系統(tǒng)首次做成了可用的數(shù)字系統(tǒng)，似乎沒有懷疑的余地。etak的系統(tǒng),就是存儲在標(biāo)準(zhǔn)盒式磁帶的數(shù)字地圖信息系統(tǒng),可以說是使汽車導(dǎo)航系統(tǒng)第一次成為現(xiàn)實(shí)。然而,日本對數(shù)字和模擬系統(tǒng)努力都高于etak的經(jīng)費(fèi)。steven lobbezoo研制出第一臺商品化衛(wèi)星導(dǎo)航系統(tǒng)車輛。它產(chǎn)生于1984年柏林開始到1986年1月。第一次公開展出是在在1985年德國漢諾威博覽會上，這個系統(tǒng)的操作是在同年德國第一頻道晚間新聞上播

23、出的。它使用一個改進(jìn)的ibm個人計算機(jī),一個大的地圖數(shù)據(jù)和一個平坦的熒屏建成了儀表板，它被稱為荷馬。在1981年alpine聲稱已經(jīng)創(chuàng)造了第一個汽車導(dǎo)航系統(tǒng)。不過,根據(jù)公司自身的歷史時間表,該公司聲稱和本田汽車合作已經(jīng)取得一種模擬汽車導(dǎo)航產(chǎn)品稱為electro gyrocator。在1985年這個工程的影響消除了。雖然有報道聲稱在1981年electro gyrocator已經(jīng)被經(jīng)銷商選用到本田雅閣,但是還不清楚是否實(shí)際的產(chǎn)品已經(jīng)公布了,是否有顧客提到了裝備electrio gyrcator的雅閣車,甚至是否出現(xiàn)在任何單位經(jīng)銷商陳列室,本田的官方歷史似乎沒有聲明electrio gyrocator已經(jīng)被實(shí)用。從1983年開始本田聲稱已經(jīng)創(chuàng)造了第一個導(dǎo)航系統(tǒng),并在二十世紀(jì)九十年代的acura legend上通過商業(yè)運(yùn)轉(zhuǎn)達(dá)到鼎盛。因?yàn)間ps系統(tǒng)尚未普遍使用，原模擬電子系統(tǒng)使用一個加速度計為慣性導(dǎo)航領(lǐng)航。然而,起于本田的在他們自己的帳戶gyrocator電子工程上的讓步,etak實(shí)際上夸大本田analog 與一個真正實(shí)用的數(shù)字系