MAGNETIC IDENTIFICATION SENSOR AND MAGNETIC IDENTIFICATION DEVICE

• Main Authors: KAWASE MASAHIRO, SEKIKAWA YUKI, ISHII YUSUKE, MATSUOKA TAKAHIRO
• Format: Patent
• Language: English; Japanese
• Published: 22.12.2022
• Subjects: CHECKING-DEVICES; HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

To accurately detect the magnetism of a medium even at the ends of a magnetic detection unit.SOLUTION: A magnetic identification sensor relatively moves a medium including a magnetic substance along a conveyance surface and detects a magnetic pattern of the magnetic substance, and comprises a magnetic detection unit in which a first magnet, a magnetic detection element, and a second magnet are arranged in order along the conveyance surface. The magnetic detection element has a first magnetic detection block and a second magnetic detection block in which a plurality of magnetic detection bodies are arranged, and the first magnetic detection block and the second magnetic detection block are arranged in this order in a direction perpendicular to the conveyance surface. The detection sensitivity at the center part of the first magnetic detection block and the detection sensitivity at the center part of the second magnetic detection block are equal to each other. The detection sensitivity in the second magnetic detection block is smaller than the detection sensitivity at the ends of the first magnetic detection block. Output of the magnetic detection unit can be obtained by performing differential processing on detection signals from the first and second magnetic detection blocks.SELECTED DRAWING: Figure 1 【課題】磁気検出ユニット端部においても精度よく媒体の磁気検知を行うことができるようにする。【解決手段】磁性体を含む媒体を搬送面に沿って相対的に移動させ、磁性体の磁気パターンを検出する磁気識別センサは、搬送面に沿って、第一の磁石と、磁気検出素子と、第二の磁石とが順に配置された磁気検出ユニットを備え、磁気検出素子は、複数の磁気検出体がそれぞれ配置された第一の磁気検出ブロックと第二の磁気検出ブロックとを有し、搬送面の垂直方向に第一の磁気検出ブロック、第二の磁気検出ブロックの順で配置され、第一の磁気検出ブロックの中央部における検出感度と第二の磁気検出ブロックの中央部における検出感度とは同等であり、第一の磁気検出ブロックの端部における検出感度よりも第二の磁気検出ブロックにおける検出感度が小さく、磁気検出ユニットの出力は、第一及び第二の磁気検出ブロックの検出信号を差動処理することによって得られる。【選択図】図１