| 摘要 |
<p>An offender approach alarm system of the present invention comprises: a wireless tracking device which periodically transmits an identification signal; a server including a database and a control module; multiple tracking stations which detect the identification signal transmitted from the wireless tracking device and transmit, to the server, detection signals including identification information about the detected identification signal and position information thereof; and a protective wireless terminal which includes a position determination module for checking a position by receiving a GPS signal, a wireless communication module for performing wireless data communication with the server, an output module for outputting information to a user, and a control module for transmitting the checked position information to the server and outputting, to the output module, an alarm message transmitted from the server.</p> |
