Aiming at requirement of preventing from losing important belongings and get back after losing in daily life

a low-cost

short distance-measuring alarm system is designed

which is based on the latest low energy consumption Bluetooth technology and take iBeacon equipment as core

combined with Android terminal. By embedding iBeacon device into important belongings

and periodically sends Beacon frame to the Android terminal

terminal services program calculate approximate distance to the terminal device based on the frame information and RSSI values. Services program provide users with three types of information which is the range of items

not within the scope and on the target device

according to alarm thresholds set by the users. It’s proved that the average effective alarm distance of system is about 2 m

alarm is triggered within an average time of 20 s.