基于数据挖掘BLE指纹室内定位设计与实现

Design and Implementation of BLE Fingerprint Indoor Positioning Based on Data Mining

在复杂的室内环境中,为了满足高精度室内定位的需求,该文提出了一种基于BLE指纹技术的高精度室内蓝牙定位方法。该方法利用iBeacon不需要直流供电直接部署、体积小、功耗低等特性,以低功耗蓝牙智能手机终端作为指纹采集系统和定位媒介系统,通过获取iBeacon信号强度参数,建立蓝牙信号强度值离线指纹库。在线定位阶段,可通过手机终端获取附近iBeacon信号强度信息,与指纹库中的指纹信息进行对比。再通过使用位置指纹定位算法进行处理,最终确定被定位目标的位置信息。从系统测试结果来看,该系统的定位精度可以达到亚米级,可以满足室内环境下基于位置的服务基本需求。

In order to meet the needs of high-precision indoor positioning in complex indoor scenes,the paper proposes a high-precision indoor Bluetooth positioning method based on BLE fingerprint technolotgy. The method uses the iBeacon without DC power supply for direct deployment,small size,low power consumption,etc.,and uses a low-power Bluetooth smart phone terminal as a fingerprint acquisition system and a positioning media system. The Bluetooth signal strength offline fingerprint database is established by obtaining the iBeacon signal strength parameter. In the online positioning phase,the nearby iBeacon signal strength information can be obtained by the mobile terminal and compared with the fingerprint information in the fingerprint database. Then,by using the location fingerprint location algorithm,the location information of the target is finally determined. From the system test results,the positioning accuracy of the system can reach the sub-meter level,which can meet the basic needs of location-based services in the indoor environment.