面向近距离的防丢失定位系统设计

Designing an Anti-lost Position System for Short Distance

由于生活中物品种类繁多,人们对于小物件常常疏于管理且在不经意间丢失,往往给人们造成一些损失。目前,市场上已经存在一些防丢失产品,如GPS防丢失钥匙扣、Bluetooth防丢失手环,但仍有一定安全风险和使用局限性。为此,本文设计一种近距离的基于RFID标签防丢失定位系统。该系统利用四个参考标签,结合RSSI算法和三角定位算法,当物品离开物品所有者一段距离后可发出报警信息,及时提醒人们物品丢失且定位物品所在的位置。通过反复测试,该系统具有稳定、功耗低特点,可有效防丢失且定位精度达两米。

Due to the variety of goods in life,people often neglect the management of small goods and inadvertently lose them so as to cause some losses.Recently,although there are some anti-lost products in the market,such as anti-lost keychain based on GPS,anti-lost bracelet based on Bluetooth,there are some security risks and limitations in the use process.To this end,we design a short-range anti-lost positioning system based on RFID.The system uses four reference tags,combines RSSI and triangle positioning algorithm.When the goods leave the owner for a certain distance,it will sound an alarm.Therefore,it can timely remind people of the lost goods and locate them.We conduct tests repeatedly,and the test results show that the system has stable,low power traits,and can prevent loss and locate goods with two meters accuracy.