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Automotive navigation system 車載衛星導航系統 An automotive navigation system is a satellite navigation system designed for use in automobiles. It typically uses a GPS navigation device to acquire position data to locate the user on a road in the unit's map database. Using the road database, the unit can give directions to other locations along roads also in its database. Dead reckoning using distance data from sensors attached to the drivetrain, a gyroscope and an accelerometer can be used for greater reliability, as GPS signal loss and/or multipath can occur due to urban canyons or tunnels. 汽車導航系統是一種設計在汽車上使用的衛星導航系統。它通常使用GPS導航裝置，以獲得位置數據，在該單位的地圖數據庫以找出用戶的一條道路，。使用道路數據庫，單位可以發出指示，到其他地點沿道路也在其數據庫中。航跡推測使用遠程數據從傳感器連接到傳動系，陀螺儀和加速度計可用于更高的可靠性， GPS信號的損失可能發生于市區的峽谷或隧道。 Automotive navigation system working principle： Automotive navigation systems mainly by the Global Positioning System (GPS) and liquid crystal display (LCD-DISPLAY) two parts. Built-in GPS antenna will receive from around the Earth 24 GPS satellites in at least three by the transfer of data, resulting in the car in which the current location. Automotive navigation systems and loaded with electronic map information stored a large number of CD-ROM, through the GPS satellite signal and determine the location coordinates of this match will determine vehicle in the electronic map in the exact location. On this basis, will achieve traffic navigation, route recommendation, information, broadcasting AV / TV, and other features. Motorists only need to watch the display on the screen, to listen to the voice prompts, manipulation of the hands of the remote control to achieve the above functions, thus easier to drive. 車用導航系統工作原理： 車用導航系統主要由全球定位系統（GPS）和液晶顯示器（LCD-DISPLAY）兩部分構成。內置的GPS天線會接收到來自環繞地球的24顆GPS衛星中的至少3顆所傳遞的數據信息，由此測定汽車當前所處的位置。 車載導航儀內部裝有儲存大量電子地圖信息的CD-ROM，通過GPS衛星信號確定的位置坐標與此相匹配，便可確定汽車在電子地圖中的準確位置。 在此基礎上，將會實現行車導航、路線推薦、信息查詢、播放AV/TV等多種功能。駕駛者只須通過觀看顯示器上的畫面、收聽語音提示，操縱手中的遙控器即可實現上述功能，從而輕松自如地駕車。

回答者：jingwtren2016-08-06 00:00