| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To surely acquire information by improving information acquisition probability for the reading of a plurality of radio tag circuit elements. <P>SOLUTION: A portable reader 1 is provided with a reader antenna 3 for transmitting/receiving information to/from a plurality of radio tag circuit elements To equipped with a tag side antenna 151; and a three-axial acceleration sensor 9 for detecting a folding operation when the reader 1 moves. A communication parameter (polarization plane, directivity, transmission intensity, transmission speed, transmission frequency, transmission protocol and transmission command) via the reader antenna 3 is controlled according to the detection result of a three-axial acceleration sensor 9 in the procedures of steps S75 to S90 (refer to figure 6). <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
