| 摘要 |
<P>PROBLEM TO BE SOLVED: To certainly detect movement of a radio tag from an object on which the radio tag is to be originally arranged, or failure of the radio tag. <P>SOLUTION: A control circuit 202 of a reader 1 acquires identification information of a specific radio tag circuit element To of a plurality of radio tag circuit elements To handled in association with a plurality of show cases 300, respectively, acquires adjacent tag information relevant to the arrangement of the plurality of radio tag circuit elements To, determines variation of arrangement of the specific radio tag circuit element To according to the acquired identification information of the specific radio tag circuit element To and the adjacent tag information of the plurality of radio tag circuit elements To, and outputs an informing signal to a display section 5 based on this determination result. <P>COPYRIGHT: (C)2007,JPO&INPIT |
