Title:
MAGNETIC SENSOR DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/190468
Kind Code:
A1
Abstract:
The purpose of the present invention is to obtain a magnetic sensor device (101) capable of accurately detecting an object to be detected (1) that uses a hard magnetic material (1a). A magnetic sensor device is provided with a magnet (3), a yoke (4, 4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h) provided in the magnet (3), and a magneto-resistance effect element (5) onto which the leakage magnetic field emitted from the yoke (4, 4a, 4b, 4c, 4d, 4e, 4f , 4g, 4h) to outside of the yoke (4, 4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h) is applied. The detection area (2a) of the magneto-resistance effect element (5) is the side opposite from the magnet (3). The magneto-resistance effect element (5) detects the change in the bias magnetic field (6) of the magneto-resistance effect element (5) that occurs when the object to be detected (1), which includes the hard magnetic material (1a), passes through the detection area (2a).
Inventors:
ASANO HIROYUKI (JP)
OGOMI TOMOKAZU (JP)
SHIMOHATA KENJI (JP)
YOSHIOKA SADAAKI (JP)
OGOMI TOMOKAZU (JP)
SHIMOHATA KENJI (JP)
YOSHIOKA SADAAKI (JP)
Application Number:
PCT/JP2015/066574
Publication Date:
December 17, 2015
Filing Date:
June 09, 2015
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G01R33/02; G01R33/09; G07D7/00; G07D7/04; H01L43/08
Foreign References:
| JP2006266862A | 2006-10-05 | |||
| JPH06180305A | 1994-06-28 | |||
| JPH01136071A | 1989-05-29 | |||
| JP2013217768A | 2013-10-24 | |||
| JPH07294540A | 1995-11-10 | |||
| JP2000039472A | 2000-02-08 |
Attorney, Agent or Firm:
INABA, Tadahiko et al. (JP)
Tadahiko Inaba (JP)
Tadahiko Inaba (JP)
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