Title:
COMMODITY INSPECTION SYSTEM AND METHOD, COMMODITY WHICH CAN BE INSPECTED, AND ILLEGAL SALE PREVENTION AID SYSTEM
Document Type and Number:
WIPO Patent Application WO/2005/088860
Kind Code:
A1
Abstract:
A commodity inspection system (2) attaches a ferromagnetic body (17) to a genuine commodity in advance and detects the magnetic characteristic of the ferromagnetic body so as to judge whether the inspection object is a genuine commodity. The system includes: an excitation coil (4) for applying a magnetic field changing with a predetermined frequency to an inspection object (8); a detection coil (6) for detecting the change of the magnetic flux density caused by the magnetic field change; an FFT calculation unit (20) for acquiring a frequency spectrum corresponding to the magnetic flux density change; and a judgment unit (22) for judging whether the inspection object is a genuine commodity according to the acquired frequency spectrum. The ferromagnetic body causes a steep magnetization inversion when a magnetic field exceeding its coercive force is applied. Unlike an ordinary ferromagnetic body, in this ferromagnetic body, the frequency spectrum corresponding to the change of the magnetic flux density caused by the magnetic field changing with a low frequency has a high-frequency component of large amplitude. Accordingly, it is possible to easily judge whether an inspection commodity is a genuine commodity.
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Inventors:
TAKEUCHI HIDEO (JP)
TSUMUKI MASUMI (JP)
IGAWA KIMITO (JP)
TANAKA MACHIKO (JP)
ICHIRYU TAKAHARU (JP)
TSUMUKI MASUMI (JP)
IGAWA KIMITO (JP)
TANAKA MACHIKO (JP)
ICHIRYU TAKAHARU (JP)
Application Number:
PCT/JP2004/017412
Publication Date:
September 22, 2005
Filing Date:
November 24, 2004
Export Citation:
Assignee:
TOYO BOSEKI (JP)
TAKEUCHI HIDEO (JP)
TSUMUKI MASUMI (JP)
IGAWA KIMITO (JP)
TANAKA MACHIKO (JP)
ICHIRYU TAKAHARU (JP)
TAKEUCHI HIDEO (JP)
TSUMUKI MASUMI (JP)
IGAWA KIMITO (JP)
TANAKA MACHIKO (JP)
ICHIRYU TAKAHARU (JP)
International Classes:
D06H1/04; D06H3/00; H04B5/02; (IPC1-7): H04B5/02; D06H1/04; D06H3/00
Foreign References:
| JPH08199498A | 1996-08-06 | |||
| JPH03198195A | 1991-08-29 | |||
| JP2003247134A | 2003-09-05 | |||
| JPH08221467A | 1996-08-30 |
Attorney, Agent or Firm:
Kawamiya, Osamu (IMP Building 3-7, Shiromi 1-chome, Chuo-ku, Osaka-sh, Osaka 01, JP)
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