Title:
【発明の名称】タグ認識方法およびタグ認識システム
Document Type and Number:
Japanese Patent JP2881381
Kind Code:
B2
Abstract:
PURPOSE:To simply recognize ID codes of plural tags by detecting a 1st signal level as a signal level of a retrieved bit when a reply comes from plural tags for a 1st period and not replying tags not making a reply for this period further more. CONSTITUTION:A reply instruction command signal generating means 24 generates a 1st reply instruction command signal and sends it to a tag 1 via a communication means 21, then the signal is received by the communication means 11 and sent to a communication means 12. A reply means 13 generates a reply signal when a signal level of a 0-th bit of an ID code is an H level and sends the signal to an equipment main body 2 via the communication means 11. Upon the receipt of the reply signal, a reply inhibit signal generating means 27 of the control means 22 generates a reply inhibit signal and sends it to the tag 1. When the reply inhibit signal is given, the tag 1 not sending the reply signal with respect to the 1st instruction command signal does not make a reply to succeeding command signals.
Inventors:
KOKUBO AKIRA
SUZUKI YUKITOSHI
TSUNASHIMA HIROMICHI
SUZUKI YUKITOSHI
TSUNASHIMA HIROMICHI
Application Number:
JP19277694A
Publication Date:
April 12, 1999
Filing Date:
July 25, 1994
Export Citation:
Assignee:
TAU GIKEN KK
SANKI KK
TOWA ERETSUKUSU KK
SANKI KK
TOWA ERETSUKUSU KK
International Classes:
B65G1/137; G06F17/30; G16H10/60; H04L12/28; H04W8/26; G06K17/00; H04W74/00; H04W74/04; H04W84/10; H04W84/12; (IPC1-7): G06K17/00; B65G1/137; G06F17/30; G06F19/00; H04L12/28
Attorney, Agent or Firm:
Kokubun Takaetsu