Title:
MAGNETIC IDENTIFICATION SENSOR
Document Type and Number:
WIPO Patent Application WO/2020/149375
Kind Code:
A1
Abstract:
The present invention makes it possible to increase an applied magnetic field on a sliding surface side of a magnetic identification sensor, thereby increasing an output of the sensor and stabilizing waveforms. Provided is a magnetic identification sensor in which magnets and a magnetic detection element are integrated at a lower part of a sliding surface which comes into contact with a medium being conveyed, and which determines a magnetic pattern of a magnetic material part within the medium, said magnetic identification sensor being characterized in that: a substantially U-shaped (horseshoe-shaped) magnetizing part is formed by disposing a pair of rectangular parallelepiped magnets, the N-S direction of which is perpendicular to the sliding surface, at a predetermined interval in a medium conveyance direction in parallel such that the polarities are opposite to each other, and by having the magnetic pole on one side of each of the magnets arranged close to the lower part of the sliding surface, and having the magnetic poles on a side opposite to the sliding surface coupled to each other by an iron-based yoke member; the magnetic detection element, a magnetic field detecting direction of which is a direction perpendicular to the sliding surface, is arranged in a space within the magnetizing part; and the magnetic pattern of the medium, which has been magnetized in the medium conveyance direction as a result of passing over the pair of magnets above the sliding surface, is read by the magnetic detection element.
Inventors:
KAWASE MASAHIRO (JP)
SEKIKAWA YUKI (JP)
SATO TAKUMI (JP)
SEKIKAWA YUKI (JP)
SATO TAKUMI (JP)
Application Number:
PCT/JP2020/001353
Publication Date:
July 23, 2020
Filing Date:
January 16, 2020
Export Citation:
Assignee:
CANON DENSHI KK (JP)
International Classes:
G11B5/39; G01R33/02; G01R33/09; G07D7/04; H01L43/00
Domestic Patent References:
| WO2007094466A1 | 2007-08-23 | |||
| WO1998038792A1 | 1998-09-03 |
Foreign References:
| JP2017215297A | 2017-12-07 | |||
| JP2010108337A | 2010-05-13 |
Attorney, Agent or Firm:
TANI & ABE, P.C. (JP)
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