Title:
MAGNETIC FIELD SENSOR
Document Type and Number:
WIPO Patent Application WO/2013/035581
Kind Code:
A1
Abstract:
Provided is a magnetic field sensor with which it is possible to simultaneously operate a DC flux gate magnetometer and a search coil magnetometer, a sensor is miniaturized by the DC flux gate magnetometer and the search coil magnetometer being positioned close to one another, and it is possible to measure a magnetic field from a DC magnetic field to an AC magnetic field of a high-frequency region of either the same point or points in close proximity. A magnetic field sensor (100) comprises: a DC flux gate magnetometer (10) further comprising a first sensor head (3) formed from a first magnetic core (1) in which at least parallel parts (1a) are formed as a magnetic body and a first detection coil (2) which is wound around the first magnetic core (1), and wherein the parallel parts (1a) of the first magnetic core (1) are in proximity to one another; and a search coil magnetometer (20) further comprising a second magnetic core (21) which has a center axis which is on the same axis as the center axis of the first magnetic core (1) of the DC flux gate magnetometer (10) and a second sensor head (24) formed from a second detection coil (22) which is wound around the second magnetic core (21). The first sensor head (3) of the DC flux gate magnetometer (10) is positioned in a region wherein magnetic flux density increases by a magnetic concentration effect of the second magnetic core (21) of the search coil magnetometer (20).
Inventors:
SASADA ICHIRO (JP)
Application Number:
PCT/JP2012/071681
Publication Date:
March 14, 2013
Filing Date:
August 28, 2012
Export Citation:
Assignee:
UNIV KYUSHU NAT UNIV CORP (JP)
SASADA ICHIRO (JP)
SASADA ICHIRO (JP)
International Classes:
G01R33/02; G01R33/04
Foreign References:
| JP2005069829A | 2005-03-17 | |||
| JP2005315812A | 2005-11-10 | |||
| JP2005069829A | 2005-03-17 | |||
| JP2008014944A | 2008-01-24 |
Other References:
See also references of EP 2755040A4
Attorney, Agent or Firm:
HIRAI YASUO (JP)
Yasuo Hirai (JP)
Yasuo Hirai (JP)
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Claims: