Invention Grant
- Patent Title: Magnetic shielding apparatus and magnetic shielding method
- Patent Title (中): 磁屏蔽装置及磁屏蔽方法
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Application No.: US14482358Application Date: 2014-09-10
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Publication No.: US09462733B2Publication Date: 2016-10-04
- Inventor: Ryuji Hokari
- Applicant: Seiko Epson Corporation
- Applicant Address: JP
- Assignee: Seiko Epson Corporation
- Current Assignee: Seiko Epson Corporation
- Current Assignee Address: JP
- Agency: Harness, Dickey & Pierce, P.L.C,
- Priority: JP2013-188097 20130911; JP2014-127008 20140620
- Main IPC: H01F27/42
- IPC: H01F27/42 ; H05K9/00 ; G01R1/18 ; G01R33/00 ; G01R33/025
Abstract:
A magnetic shielding apparatus includes: a passive shield; a correction target space that is defined in the interior of the passive shield; external coils as a first coil that corrects a magnetic field in the passive shield; a first magnetic sensor; a second magnetic sensor that is arranged more inside the passive shield than the first magnetic sensor; and a control unit. The first magnetic sensor and the second magnetic sensor measure a magnetic field gradient in the passive shield. The control unit controls the external coils based on a result of the measurement performed by the first magnetic sensor and the second magnetic sensor.
Public/Granted literature
- US20150069846A1 MAGNETIC SHIELDING APPARATUS AND MAGNETIC SHIELDING METHOD Public/Granted day:2015-03-12
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