| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable efficient recognition of information on a plurality of radio data carriers carried on a transport path such as conveyer. <P>SOLUTION: A plurality of antennas 21A and 21B are provided on both sides of a transport path so that the transport path is defined as communication areas 31 and 32 with radio data carriers 10, provided that the communication area 32 of the antennas 21A and 22A is shifted to the transferring direction. Thus, information which the radio data carriers 10 have are recognized without overlapping with each other from the information received by the antennas 21A and 22A as a result of radio communication with the radio data carriers 10 transferred on the transport path 13. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
