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Patent Searching and Data


Title:
INTERROGATING DEVICE OF ELECTRONIC TAG
Document Type and Number:
Japanese Patent JPH04361915
Kind Code:
A
Abstract:

PURPOSE: An interrogating device having an extensive communicable range without interference of an electric wave.

CONSTITUTION: Frequency and/or transmission time of a transmission wave transmitted by a plural number of interrogators 3 are/is varied from each other in order not to overlap them/it. Consequently, there is no interference of electric waves among the interrogators 3 approaching others, and a communicable range with an electronic tag substantially extends. Accordingly, it comes to be possible to communicate with the electronic tag 5 attached to a load W in spite of irregularity of the size and the direction of the load W placed on a conveyor C, for example. Otherwise, the communicable range is substantially extended by moving the interrogators 3 around the conveyor C. Thereby, it is made possible to communicate with the electronic tag 5 attached to the load W in spite of irregularity of the size and the direction of the load W.


Inventors:
KATO TOSHIYUKI
MIZUNO TOMOAKI
MATSUMOTO MANABU
Application Number:
JP1991000135004
Publication Date:
December 15, 1992
Filing Date:
June 06, 1991
Export Citation:
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Assignee:
NIPPON DENSO CO
International Classes:
B65G43/08; B65G47/49; B65G61/00; G06K17/00; G06Q10/08; G06Q50/00; G06Q50/28; H04W4/04; G06F19/00; (IPC1-7): B65G43/08; B65G47/49; G06F15/24; G06K17/00