发明名称 |
MAGNETIC FIELD MEASUREMENT SYSTEM |
摘要 |
A magnetic field measurement system for canceling an external field is provided, in which plurality of sensing magnetometers (3) for measuring a magnetic field signal in a direction perpendicular to the center axis of a cylindrical magnetic shield (1) are arranged in two dimensions on a plane parallel to the center axis and a reference magnetometer (4) for measuring the external field parallel to the center axis as a reference signal is disposed on a plane perpendicular to the plane parallel to the center axis. The reference signal multiplied by a specified factor is subtracted from a difference between signals from the adjacent sensing magnetometers (3). The magnetic field measurement system allows measurement of an extremely weak magnetic field by efficiently canceling the external field.
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申请公布号 |
US2004232912(A1) |
申请公布日期 |
2004.11.25 |
申请号 |
US20040844480 |
申请日期 |
2004.05.13 |
申请人 |
TSUKAMOTO AKIRA;YOKOSAWA KOICHI;SUZUKI DAISUKE;KANDORI AKIHIKO;TSUKADA KEIJI |
发明人 |
TSUKAMOTO AKIRA;YOKOSAWA KOICHI;SUZUKI DAISUKE;KANDORI AKIHIKO;TSUKADA KEIJI |
分类号 |
A61B5/05;G01R33/025;G01R33/035;(IPC1-7):G01R33/04 |
主分类号 |
A61B5/05 |
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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