| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To efficiently execute stable read/write processing, by easily discriminating an RFID tag state in a communication exchange area and a processing content relative to the tag. <P>SOLUTION: On one side face of a moving object (conveyer 5), an RFID tag 4, having a mirror M on the surface thereof, is attached. Also, an antenna unit 10 of a reader/wrinter 1 and a reflective photoelectric sensor 2 are disposed at positions opposite to the RFID tag 4 during the movement of the conveyer 5. When the RFID tag 4 enters the communication exchange area of the antenna unit 10, the mirror M enters the sense area of the photoelectric sensor 2, and a light receiving amount of the photoelectric sensor 2 is increased. An upper-level control device, having an input of the output signal of the photoelectric sensor 2, controls read/write processing by the reader/writer 1, based on the change of the light receiving amount or the magnitude of the light receiving amount indicated by the input signal. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
