Title:
磁場計測装置
Document Type and Number:
Japanese Patent JP4671770
Kind Code:
B2
Abstract:
A second magnetically shielding apparatus (3) is disposed with a first magnetically shielding apparatus (1) that is formed as a cylinder having both ends open. The second shielding apparatus is formed as a cylinder with both ends or one end close to an object to be measured being open, has an axial direction substantially in parallel with the magnetic flux density detection direction, and has a magnetic sensor (5) disposed within its cylinder, which conducts magnetic signal measurement, to thereby shield a magnetic flux density component that cannot be shielded by the first magnetically shielding apparatus at the periphery of the magnetic sensor.
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Inventors:
Daisuke Suzuki
Application Number:
JP2005170300A
Publication Date:
April 20, 2011
Filing Date:
June 10, 2005
Export Citation:
Assignee:
Hitachi High-Technologies Corporation
International Classes:
A61B5/05; G01R33/035; H05K9/00
Domestic Patent References:
| JP2004337478A | ||||
| JP2005131149A | ||||
| JP2003339659A | ||||
| JP2002136492A |
Attorney, Agent or Firm:
Manabu Inoue