发明名称 |
Compass sensor unit and portable electronic device |
摘要 |
In a compass sensor unit, an azimuth data computing method is carried out by the steps of: inputting a signal from a geomagnetic sensor to measure magnetic field; determining whether to store measurement data of the magnetic field based on a distance from the last stored measurement data; calculating an offset value based on the stored data; making a comparison for each component of a plurality of measurement data used for calculating the offset value, and judging the offset value to be valid when a difference between the maximum and minimum values of each component is a given value or more; updating the already stored offset value to the offset value judged to be valid; and correcting newly provided measurement data by the updated offset value to compute azimuth data.
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申请公布号 |
US2006021238(A1) |
申请公布日期 |
2006.02.02 |
申请号 |
US20050149732 |
申请日期 |
2005.06.10 |
申请人 |
SATO HIDEKI;WAKUI YUKIO;OMURA MASAYOSHI |
发明人 |
SATO HIDEKI;WAKUI YUKIO;OMURA MASAYOSHI |
分类号 |
G01C17/38;G01R33/02 |
主分类号 |
G01C17/38 |
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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