| 摘要 |
<p>[PROBLEMS] To improve information acquisition probability in reading of a plurality of wireless tag circuit elements and to surely acquire information. [MEANS FOR SOLVING PROBLEMS] A reader (1) is provided with a reader antenna (3) for transmitting/receiving information to and from a plurality of wireless tag circuit elements (To) each of which has a tag side antenna (151). The reader is constituted to be portable. The reader is also provided with a triaxial acceleration sensor (9) for detecting returning operation when the reader (1) is moved. Procedures (shown in Fig. 6) of a step (S75) to a step (S90) control communication parameters (polarization surface, directivity, transmission intensity, transmission speed, transmission frequency, transmission protocol and transmission command) through the reader antenna (3), depending on the detection results obtained from the triaxial acceleration sensor (9).</p> |
