| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio crime prevention device requiring only one transmitter-receiver regardless of the number of installation places of radio tags. SOLUTION: A locking part 6 is provided with a lock sensor 10 for detecting opening/closing of the locking part 6, and a locking information transmitter 1 comprising a non-powered radio tag 11 radio-transmitting locking information from the lock sensor 10. A locking confirmation device 2 is disposed comprising a radio transmitting-receiving circuit 13 receiving the locking information transmitted from the radio tag 11 and comprising a battery 14 to radio-transmit electric power to the locking information transmitter 1 and further radio-transmitting the received locking information to an interphone master unit 3, and wheels 15 for self-advancing. The interphone master unit 3 is provided with a radio receiving circuit 20 receiving the locking information transmitted from the locking confirmation device 2 to the interphone master unit 3, and a display part 21 displaying the received locking information. COPYRIGHT: (C)2007,JPO&INPIT
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