发明名称 |
Track information generating device, track information generating method, and computer-readable storage medium |
摘要 |
Track information generating devices, methods, and programs acquire a self-contained navigation track of a vehicle indicated by time-series pieces of self-contained navigation information, and acquire a GPS track of the vehicle indicated by time-series pieces of GPS information. The devices, methods, and programs compare the self-contained navigation track with the GPS track to correct the self-contained navigation information so as to reduce a difference between the self-contained navigation track and the GPS track. |
申请公布号 |
US8843340(B2) |
申请公布日期 |
2014.09.23 |
申请号 |
US201113098868 |
申请日期 |
2011.05.02 |
申请人 |
Aisin AW Co., Ltd. |
发明人 |
Oohashi Yusuke;Sakaki Daisuke;Ando Yohei |
分类号 |
G01C17/38;G01C22/00;G01C21/30;G01C21/16 |
主分类号 |
G01C17/38 |
代理机构 |
Oliff PLC |
代理人 |
Oliff PLC |
主权项 |
1. A track information generating device comprising:
a self-contained navigation track acquisition unit that acquires a self-contained navigation track that is a track of a vehicle indicated by a plurality of time-series pieces of self-contained navigation information obtained from a speed sensor and a direction sensor on the vehicle; a GPS track acquisition unit that acquires a GPS track that is a track of the vehicle indicated by a plurality of time-series pieces of GPS information obtained from a GPS sensor on the vehicle, each time-series pieces of GPS information including GPS accuracy information that indicates an accuracy of the piece of GPS information; and a self-contained navigation information correcting unit that:
rotates and translates the self-contained navigation track to a location and orientation having the highest degree of coincidence between the self-contained navigation track and the GPS track;determines a rotation angle for rotating the self-contained navigation track on the basis of a representative value of direction differences between directions of the vehicle, indicated by the pieces of self-contained navigation information at multiple time points, and directions of the vehicle, indicated by the pieces of GPS information at multiple time points;determines the representative value of the direction differences on the basis of a frequency distribution of the direction differences, which is generated so that a frequency increases with an increase in the accuracy of the GPS information, indicated by the corresponding GPS accuracy information, and determines a representative value of the position differences on the basis of a frequency distribution of the position differences, which is generated so that a frequency increases with an increase in the accuracy of the GPS information, indicated bathe corresponding GPS accuracy information;determines a translation amount for translating the self-contained navigation track on the basis of a representative value of position differences between positions of the vehicle, indicated by the pieces of self-contained navigation information at multiple time points, and positions of the vehicle, indicated by the pieces of GPS information at multiple time points;sets a correction target of the self-contained navigation information on the basis of the rotated and translated the self-contained navigation track;corrects the self-contained navigation information by reducing a difference between the correction target and the self-contained navigation information; andcompares the rotated and translated self-contained navigation track with the GPS track to correct the self-contained navigation information by reducing a difference between the self-contained navigation track and the GPS track. |
地址 |
Anjo JP |