| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To recognize respective articles at a high recognition rate without being conscious of positional deviations of respective radio tags attached to the same positions of a plurality of superposed articles. <P>SOLUTION: In an article 30 to which a plurality of radio tags 31, 32 are previously attached so that the directional axes of tag antennas included in respective radio tags 31, 32 intersect with each other, communication is performed by a first tag communication antenna 13 having directivity opposed to the directivity of the tag antenna included in one radio tag 31 out of the plurality of radio tags 31, 32 attached to the article 30 and a second tag communication antenna 14 having directivity opposed to the directivity of the tag antenna included in other radio tag 32, and the article 30 is recognized by the information of the radio tag read out by at least one tag communication antenna. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
