发明公开
EP0481211A2 Gradiometer having a magnetometer which cancels background magnetic field from other magnetometers
失效
Gradiometer mit einem Magnetometer zur Kompensation von der Magnetfeldhintergrund von anderen Magnetometern。
- 专利标题： Gradiometer having a magnetometer which cancels background magnetic field from other magnetometers
- 专利标题（中）： Gradiometer mit einem Magnetometer zur Kompensation von der Magnetfeldhintergrund von anderen Magnetometern。
-
申请号： EP91115244.5申请日： 1991-09-10
-
公开(公告)号： EP0481211A2公开(公告)日： 1992-04-22
- 发明人: Koch, Roger H.
- 申请人： International Business Machines Corporation
- 申请人地址： Old Orchard Road Armonk, N.Y. 10504 US
- 专利权人： International Business Machines Corporation
- 当前专利权人： International Business Machines Corporation
- 当前专利权人地址： Old Orchard Road Armonk, N.Y. 10504 US
- 代理机构： Jost, Ottokarl, Dipl.-Ing.
- 优先权： US594810 19901009
- 主分类号： G01R33/022
- IPC分类号： G01R33/022
摘要：
A gradiometer utilizing at least three vector magnetometers (11, 12, 13) (preferably SQUIDs) to measure a magnetic field gradient. An average magnetometer (13) (SQUID) is used to cancel background magnetic fields from outputs of the difference magnetometers (11, 12) via a feedback loop (21, 22, 23) provided with a signal from the average magnetometer (13). Similarly, higher order gradiometers can be built using an average magnetometer cube and a plurality of difference magnetometer cubes. The gradiometer would find application in a wide range of fields, such as geology and medecine.
公开/授权文献
信息查询
