发明名称 |
Navigation system and method using map data. |
摘要 |
<p>In a navigation system which has sensors for detecting a running distance, an azimuth, etc. of a vehicle, and a memory for storing map data, a probability density of a position of the vehicle is calculated on the basis of the sensor outputs and the map data for each of quantization units with which a probability computation determined by detection accuracies of the sensors and quantization of the map data can be executed. In addition, a final stage calculation of DP matching between trajectory data obtained from the. on-board sensor data from a start point of the vehicle till a current time and a candidate route estimated from the road map data is iteratively executed, whereby a plurality of estimative vehicular positions and uncertainties (costs) corresponding to the respective estimative positions are iteratively evaluated, and a correct vehicular position is estimated by selecting at least one estimative vehicular position of low uncertainty (cost).</p> |
申请公布号 |
EP0359287(A2) |
申请公布日期 |
1990.03.21 |
申请号 |
EP19890117144 |
申请日期 |
1989.09.15 |
申请人 |
HITACHI, LTD. |
发明人 |
KOMURA, FUMINOBU OKURAYAMA-FURATTO NR. 406;HIRAYAMA, YOSHIKAZU;HOMMA, KOICHI HAKURAKU-HAUSU NR. 602;KATO, MAKOTO HITACHI-SAGINUMA-RYO;SHIBATA, TAKANORI;MATSUOKA, YOJI MURATA APT. NR. 13;KAGAMI, AKIRA HITACHI-SAGINUMA-RYO;KOSAKA, MICHITAKA |
分类号 |
G01C21/00;G01C21/30;G06F17/30 |
主分类号 |
G01C21/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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