Title:
アクセス装置、RFIDシステムおよび物品管理方法
Document Type and Number:
Japanese Patent JP4639234
Kind Code:
B2
Abstract:
[Object] The present invention provides an electromagnetic inductive RFID tag to be used along with an article containing a metal, and an apparatus for accessing the RFID tag. [Constitution] An electromagnetic inductive RFID tag in the present invention comprises a magnetic core member having two ends, each of which has an end face, an antenna coil wound on the magnetic core member, and an IC chip connected to the antenna coil, in which, with respect to a direction of a magnetic flux entering an one side of the end face, a direction of a magnetic flux emitting from the other side of the end face is substantially at an angle of 180 degrees. By such characteristics, information can be read with a high reading accuracy without being influenced by a surrounding metal. An apparatus accessesing the RFID tag comprises a magnetic core member having two ends, each of which has an end face, an antenna coil wound on the magnetic core member, and a control unit connected to the antenna coil, in which, with respect to a direction of the magnetic flux entering an one side of the end face, a direction of a magnetic flux emitting from the other side of the end face is substantially at an angle of 180 degrees. It is preferable that such an access apparatus is used in combination with the RFID tag in the present invention.
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Inventors:
Kaoru Fukuda
Akihisa Sakurai
Hitoshi Nishino
Takaaki Takashima
Akihisa Sakurai
Hitoshi Nishino
Takaaki Takashima
Application Number:
JP2007539987A
Publication Date:
February 23, 2011
Filing Date:
October 12, 2006
Export Citation:
Assignee:
INTERNATIONAL BUSINESS MASCHINES CORPORATION
International Classes:
H04B5/02; G06K17/00; G06K19/07; G06K19/077
Domestic Patent References:
| JPH02249319A | 1990-10-05 | |||
| JPH10108375A | 1998-04-24 | |||
| JP2001298879A | 2001-10-26 | |||
| JPH0818325A | 1996-01-19 | |||
| JPH06350495A | 1994-12-22 | |||
| JPS57112143A | 1982-07-13 | |||
| JPS61182206A | 1986-08-14 | |||
| JP2001126939A | 2001-05-11 | |||
| JP2001078372A | 2001-03-23 | |||
| JP2005244688A | 2005-09-08 |
Attorney, Agent or Firm:
Takeshi Ueno
Tasaichi Tanae
Yoshihiro City
Hiroshi Sakaguchi
Tasaichi Tanae
Yoshihiro City
Hiroshi Sakaguchi