Alarm and providing information device with two way transmission mode for preventing loss of smart-phone, and system for preventing loss of smart-phone including the same

摘要

The present invention relates to a bi-directional alarm apparatus for preventing loss of a smart phone, and a smart phone loss prevention system including the same. The bi-directional alarm apparatus for preventing loss of a smart phone according to the present invention includes: an input/output part (21), a near field communications part (22), a transceiver part (23), a control part (24), a storage part (25), a voice output part (26) and a GPS receiver part (27). The control part (24) includes: a distance measurement module (24a) which calculates distance information between a smart phone (10) and the bi-directional alarm apparatus (20) by measuring round trip time (RRT) with a near field communications terminal (11) of the smart phone (10) by controlling the near filed communications part (22), and performs final straight distance calculation through correction as to position calculation information between collected GPS position information, after collecting GPS position information of the bi-directional alarm apparatus (20) received from the GPS receiver part (27) and GPS position information of the smart phone (10) received by the GPS receiving terminal (12) of the smart phone (10) received through a near field communications part (12) in the calculated distance information; and an alarm judgment module (24b) which judges whether the final straight distance exceeds a predetermined threshold straight distance, and starts to realize the final straight distance by the input/output part (21) if the final straight distance exceeds the threshold straight distance, and performs realization to the input/output part (21) by calculating the final straight distance in real-time.