基于NB-IoT的儿童防丢系统的设计

中国每年有很多儿童走丢，一旦儿童丢失找回来的几率微乎其微。基于此，设计一种基于窄带物联网（Narrow Band Internet of Things, NB-IoT）的儿童防丢系统，采用NB-IoT替代传统的蓝牙、WiFi、GPRS等方式，具有功耗小、覆盖广、穿透强、信号好等优点;采用北斗定位模块替代传统的GPS，具有无盲区、定位准等优点。利用NB-IoT与基站建立连接，将北斗卫星导航系统输出的定位信息通过NB-IoT传输至基站。用户可通过移动客户端随时查看儿童的位置信息，帮助家长快速定位并找回儿童，降低儿童丢失的几率。

Design of Child Anti-lost System Based on NB-IoT

There are many children lost in China every year, once child lost, the chance of getting back is very little. Based on this, the design of the childrens anti-lost system based on narrow band Internet of Things (NB-IoT), adopts NB-IoT insteading of traditional Bluetooth, WiFi and GPRS, has the advantages of low power consumption, wide coverage, strong penetration, good signal etc. Using Beidou positioning module to replace the traditional GPS has the advantages of no blind spot and accurate positioning. Using NB-IoT to establish a connection with the base station, the positioning information output by Beidou satellite navigation system is transmitted to the base station through NB-IoT. Users can view the location information of children at any time through the mobile client to help parents quickly locate and retrieve children and reduce the chance of child loss.