发明名称 |
AZIMUTH MEASUREMENT DEVICE AND AZIMUTH MEASUREMENT METHOD |
摘要 |
There are provided an azimuth measurement device and its method for realizing an update of an offset calculated from the data acquired by azimuth measurement. A geomagnetism output measured by a 3-axis magnetic sensor (10) is amplified by an amplification section (13) and input to an A/D conversion section (14). A chopper section (11) is arranged for switching the terminals for driving an X-axis magnetic sensor (2), a Y-axis magnetic sensor (3), and a Z-axis magnetic sensor (4) and applies drive voltage output from a drive power source section (12) to the X-axis magnetic sensor (2), the Y-axis magnetic sensor (3), and the Z-axis magnetic sensor (4). The output amplified value amplified by the amplification section (13) is converted from an analog signal to a digital signal by the A/D conversion section (14) and then is input to a sensitivity/offset correction calculation section (16). Output data from this sensitivity/offset correction calculation section (16) is input to an azimuth calculation section (20) and the corresponding azimuth information is output. A reliability information calculation section (19) outputs reliability information. ® KIPO & WIPO 2009
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申请公布号 |
KR20080106990(A) |
申请公布日期 |
2008.12.09 |
申请号 |
KR20087028968 |
申请日期 |
2004.07.01 |
申请人 |
ASAHI KASEI EMD CORPORATION |
发明人 |
KITAMURA TORU;SATO MASANOBU;YAMASHITA MASAYA;MIKOSHIBA NORIHIKO |
分类号 |
G01C17/28;G01C17/38;G01C21/08 |
主分类号 |
G01C17/28 |
代理机构 |
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主权项 |
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地址 |
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