发明名称 |
TRAVELING DIRECTION MEASURING APPARATUS AND TRAVELING DIRECTION MEASURING METHOD |
摘要 |
The present invention relates to a traveling direction measuring apparatus usable as a pedestrian navigation system in locations where it is difficult to obtain high positioning accuracy such as inside buildings or around multistory buildings where a GPS cannot be used. An acceleration detecting section (1) detects 3-axes acceleration of the traveling direction measuring apparatus, which varies with the walking of the pedestrian. An acceleration data acquiring section (2) obtains 3-axes acceleration data repeatedly by the number of prescribed times or more, said 3-axes acceleration data varies with the walking of the pedestrian. A first gravity acceleration calculating section (3) calculates, when the pedestrian is walking with holding the traveling direction measuring apparatus in a generally fixed attitude, gravity acceleration by averaging acceleration data sets during several steps obtained by the acceleration data acquiring section (2). A first moving direction estimating section (4) estimates the moving direction of the pedestrian from frequency components corresponding to the duration of one step of the acceleration data sets projected on a plane perpendicular to the gravity acceleration calculated by the first gravity acceleration calculating section (3).
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申请公布号 |
EP1867951(A1) |
申请公布日期 |
2007.12.19 |
申请号 |
EP20060730227 |
申请日期 |
2006.03.28 |
申请人 |
ASAHI KASEI EMD CORPORATION |
发明人 |
KITAMURA, TORU;YAMASHITA, MASAYA |
分类号 |
G01C22/00;A61B5/11;G01C21/00;G01C21/10;G01C21/20;G01P13/02 |
主分类号 |
G01C22/00 |
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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