公开(公告)号：US10775470B2

公开(公告)日：2020-09-15

申请号：US15774744

申请日：2016-11-11

Applicant: GLORY LTD.

Inventor： Naoki Ueyama ,  Masaaki Hayashi

IPC: G01R33/02 ,  G01R35/00 ,  G01R33/09 ,  G07D7/04 ,  G01V3/08 ,  G07D7/20

Abstract: One object is to correct with a high accuracy a plurality of magnetic sensors arranged inside a small magnetic detection apparatus. The magnetic detection apparatus that detects magnetism of a paper sheet being transported includes a plurality of magnetic sensors arranged in a linear manner in a direction orthogonal to a transport direction of the paper sheet; an excitation member having a plate-shape that extends in an arrangement direction of the plurality of magnetic sensors; and a control unit that generates a calibration magnetic field by passing an electric current in the arrangement direction through the excitation member, and obtains a correction value for correcting variation in sensitivity of the plurality of magnetic sensors based on detection results of the calibration magnetic field detected by the plurality of magnetic sensors.

公开(公告)号：US09886808B2

公开(公告)日：2018-02-06

申请号：US14778337

申请日：2014-04-09

Applicant: GLORY LTD.

Inventor： Naoki Ueyama ,  Masaaki Hayashi

IPC: G01N27/72 ,  G07D7/04 ,  G01N27/84 ,  G01R33/12 ,  G01R33/09 ,  G06K7/08 ,  G06K19/06 ,  G01N33/34

CPC classification number: G07D7/04 ,  G01N27/72 ,  G01N27/84 ,  G01N33/346 ,  G01R33/09 ,  G01R33/093 ,  G01R33/12 ,  G06K7/084 ,  G06K19/06187

Abstract: A magnetic property determination apparatus that detects a magnetic property of each magnetic material included in a paper sheet transported through a transport path and determines the magnetic materials. The magnetic property determination apparatus includes a magnetic detection unit that generates on the transport path a bias magnetic field having a magnetic field direction inclined to a transport surface of the paper sheet by a specific angle and detects the magnetic charge of the magnetic materials by detecting variation of the bias magnetic field; and a magnetization unit that is arranged upstream of the magnetic detection unit in the transport direction and magnetizes the magnetic materials by generating on the transport path a magnetization magnetic field having a magnetic field direction oriented in a direction different from the direction of the bias magnetic field. At a position at which the magnetic detection unit detects the magnetism, the magnetic materials are in a state in which the magnetic materials are magnetized in mutually different magnetization directions according to coercive force thereof.