中文摘要：

针对随身重要物品防丢失和找回的需求,基于最新的蓝牙低能耗技术,以iBeacon设备为核心、结合Android终端设计了一种低成本短距离测距报警系统。通过将iBeacon设备嵌入到重要物品中,并周期向Android终端发送Beacon帧,终端服务程序根据帧信息和RSSI值计算设备与终端的大致距离。服务程序可根据用户设置的报警阈值,向用户提供物品在范围内、不在范围内和在目标设备上三类信息。经验证,系统平均有效报警距离在2 m左右,触发报警平均时间20 s以内。

英文摘要：

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.