Title:
MAGNETIC SENSOR FOR COIN IDENTIFICATION, COIN PROCESSING DEVICE, AND COIN IDENTIFICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2017/030114
Kind Code:
A1
Abstract:
A sensor unit (30) including a coil is disposed on the lower surface of a conveyance path (20) for a coin (10), whereby a magnetic field larger than the maximum diameter of the coin (10) is generated, and a parallel resonance impedance is calculated by means of frequency sweeping. An inductance is calculated from the resonance frequency of the parallel resonance impedance, and a resistance component at the parallel resonance impedance is calculated from the impedance value and the inductance value. The denomination and authenticity of the coin (10) are identified by using a variation in the inductance as an index for discriminating the size of the coin (10), and a variation in the resistance as an index for discriminating the material of the coin (10).
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Inventors:
NAKATSUKA SHIGEKI (JP)
Application Number:
PCT/JP2016/073878
Publication Date:
February 23, 2017
Filing Date:
August 16, 2016
Export Citation:
Assignee:
GLORY KOGYO KK (JP)
International Classes:
G07D5/08
Foreign References:
| JPS5349498A | 1978-05-04 | |||
| JP2010123522A | 2010-06-03 | |||
| JP2008003672A | 2008-01-10 |
Attorney, Agent or Firm:
NAKATSUJI, Shiro et al. (JP)
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