Title:
金属円板判別装置
Document Type and Number:
Japanese Patent JP5242205
Kind Code:
B2
Abstract:
According to one aspect of the invention, there is provided a metal disk discrimination apparatus including: two magnetic sensors configured to sandwich a target metal disk, the magnetic sensor including: a core having: leg portions exhibiting opposite magnetic polarities, the leg portion having an end face facing the target metal disk, and a connection portion magnetically connecting the leg portions; and coils respectively wound on the leg portions; an oscillation circuit that passes an alternating current through the coil; and a signal processing unit that determines a shape of the target metal disk by comparing an output signal of the magnetic sensors with a reference value, the output signal corresponding to a change in impedance of the coils. A radius of curvature of the end face in a part adjacent to another end face is not larger than a radius of the target metal disk.
Inventors:
Takehiro Hato
Toshikatsu Akiba
Kazumi Kotani
Toshikatsu Akiba
Kazumi Kotani
Application Number:
JP2008069706A
Publication Date:
July 24, 2013
Filing Date:
March 18, 2008
Export Citation:
Assignee:
Toshiba Corporation
TOSHIBA TEC CORPORATION
TOSHIBA TEC CORPORATION
International Classes:
G07D5/08; G01N27/72
Domestic Patent References:
| JP2000187746A |
Foreign References:
| US5609234 | ||||
| US6668999 |
Attorney, Agent or Firm:
Norio Ohu
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