发明名称 |
Direction detection apparatus |
摘要 |
A direction detection apparatus comprising a magnetic sensor which senses a geomagnetic azimuth, a turning-angle sensor which senses a turning angle dynamically, a magnetic-disturbance detector which detects a magnetic disturbance on the basis of the output of the magnetic sensor, and a signal switching device which transmits either the magnetic sensor output or the turning-angle sensor output to a display device in accordance with a signal from the magnetic-disturbance detector. The traveling direction of a moving object can be detected as a precise geographic azimuth even when the moving object lies in a place subject to the magnetic disturbance.
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申请公布号 |
US4429469(A) |
申请公布日期 |
1984.02.07 |
申请号 |
US19810320523 |
申请日期 |
1981.11.12 |
申请人 |
ALPS ELECTRIC CO., LTD. |
发明人 |
TSUSHIMA, NOBORU;TOMOYORI, MAKOTO;HARUMATSU, MASATOSHI |
分类号 |
B62D15/00;G01C17/30;G01C17/38;G01C21/00;G01P13/04;G01R33/04;(IPC1-7):G01C17/28 |
主分类号 |
B62D15/00 |
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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