| 摘要 |
PROBLEM TO BE SOLVED: To provide an IC tag low in power consumption and simple in configuration and to provide a tag detection system. SOLUTION: In this IC tag 20 for performing transmission at every prescribed set time by providing a communication circuit 22, control part 23, power source part 25 for supplying power from a battery 25a to them and time measuring means 24, the system is also provided with a detector 10 equipped with the plural tags of mutually different set time so as to detect the presence/absence of respective tags based on the communication with them, and the detector 10 has a communication circuit 12 and detects the presence/absence of reception by successively discriminating it at every set time of each IC tag. Since there is no inquiry from the detector 10, the IC tag 20 can avoid useless reaction or battery consumption. |
