Title:
COIN IDENTIFYING MAGNETIC SENSOR, COIN PROCESSING DEVICE, AND COIN IDENTIFICATION METHOD
Document Type and Number:
Japanese Patent JP2017041111
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To achieve reduction in size and cost of a device when coin identification using magnetism is performed.SOLUTION: A sensor part 30 including a coil is arranged on a lower surface of a conveyance path 20 of a coin 10, and a larger magnetic field than the maximum diameter of the coin 10 is generated, so that parallel resonance impedance is calculated by frequency sweep. Inductance is calculated from a resonance frequency of the parallel resonance impedance, so that a resistance component in the parallel resonance impedance is calculated from a value of the impedance and a value of the inductance. A change portion of the inductance is used as a determination index of size of the coin 10 and a change portion of resistance is used as a determination index of material of the coin 10, so that a denomination and authenticity of the coin 10 are identified.SELECTED DRAWING: Figure 1
Inventors:
NAKATSUKA SHIGEKI
Application Number:
JP2015162486A
Publication Date:
February 23, 2017
Filing Date:
August 20, 2015
Export Citation:
Assignee:
GLORY KOGYO KK
International Classes:
G07D5/08
Attorney, Agent or Firm:
Shiro Nakatsuji
Junichi Suwa
Junichi Suwa