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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0170405 (1993-12-20) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 326 인용 특허 : 0 |
A hybrid vehicle navigation system employs both GPS and dead reckoning sensors, working in parallel, to produce a sensed and a calculated position, respectively. The sensed and the calculated positions are compared to a road data base to determine separate correction factors required to correct the
A hybrid vehicle navigation system employs both GPS and dead reckoning sensors, working in parallel, to produce a sensed and a calculated position, respectively. The sensed and the calculated positions are compared to a road data base to determine separate correction factors required to correct the sensed and the calculated positions. In one embodiment, the system employs either the sensed or calculated position for navigation depending on which has the smaller correction factor.
A hybrid vehicle navigation system comprising: means for determining a sensed position of said vehicle from a Global Positioning System; means for determining a calculated position of said vehicle by means of a dead reckoning sensor system; a first comparison means for comparing said calculated posi
A hybrid vehicle navigation system comprising: means for determining a sensed position of said vehicle from a Global Positioning System; means for determining a calculated position of said vehicle by means of a dead reckoning sensor system; a first comparison means for comparing said calculated position with a map database containing pre-stored locations obtained from an external system and for choosing therefrom a map-matched position of said vehicle; a second comparison means for comparing said calculated position and said sensed position with said chosen map-matched position and for producing a plurality of correction factors for each of said calculated position and said sensed position; means for averaging said plurality to produce a smoothed correction factor effective for producing a zero difference between said chosen map-matched position and said sensed position; and means for correcting said vehicle position based on said smoothed correction factor.
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