基于iBeacon和多自由度MEMS的室内融合定位技术研究

Indoor positioning technology research based on iBeacon fusion and multiple degree of freedom of MEMS

由于GPS信号在室内环境下不能有效地实现定位和导航,因此精确的室内定位技术仍然是一个十分活跃的研究课题。行人航迹推算(PDR)可以使用智能手机的自带传感器实现室内连续定位。然而,它会随着行走距离的变长产生很大的累计误差。因此,提出一种基于iBeacon和手机MEMS相融合的精确的室内定位方法。在行走路径上加入iBeacon信标和二维码信标,系统自适应地选择相应的校正模式纠正PDR算法产生的累计误差。最后完成了基于Android平台的室内定位软件的开发。实验结果显示,文中方法的定位结果与PDR定位结果相比较,定位精度有了显著的提高,融合定位的平均误差在2m以内,定位精度满足项目需要。

Since GPS signals are denied in indoor environments,the technology for accurate indoor localization is still an active on-going research topic. The pedestrian dead reckoning（ PDR） can be applied for localization using smartphone sensors. Unfortunately,it will drift with walking distance. Therefore,in this paper,a framework combining smartphone sensors MEMS and iBeacons was presented for accurate indoor localization. By joining i Beacon beacons and two-dimensional code beacon system in the walking path,the system can adaptively select the appropriate correction mode to correct the accumulated error PDR algorithm produces,then finally complete Androidbased indoor positioning software development. Experimental results show that the positioning accuracy in this method has been significantly improved compared with the PDR,with an average error of fusion location within two meters,the positioning accuracy meets the need of project.