| 摘要 |
PURPOSE: A system for alarming the access of criminals using an electronic foot bracelet and a method thereof are provided to trace the appearance of criminals within a constant section by recognizing radio signals transmitted from the electronic foot bracelet. CONSTITUTION: An electronic foot bracelet(1) is attached to the body of a specific criminal and comprises a radio transmission chip inside. A radio transceiver(2) receives radio signals transmitted from the electronic foot bracelet and transmits the access information of the electronic foot bracelet to the controller. The controller(3) senses the access of the electronic foot bracelet according to the signals transmitted from the radio transceiver and operates an alarm. The alarm(4) is operated by the control signals of the controller. |
