智慧电厂应用场景下多源信息融合的室内定位精度

Accuracy analysis of indoor positioning technology based on multi-source information fusion in smart power plant

随着高精度室内定位技术的出现,使得室内定位技术成为电厂智慧安全管控体系建设中的重要组成部分。由于电厂主厂房大量的金属设备、管道等复杂空间结构对室内定位精度会造成很大的影响,经研究发现多源信息融合室内定位技术能够很好地避免这种现象。为评估多源信息融合室内定位技术在电厂主厂房场景下的定位精度,以实际火电厂主厂房场景下为例,采用融合蓝牙、惯性导航系统(INS)、磁场及地图信息的多源信息融合室内定位技术,并通过用实际数据来验证其精度水平。试验结果表明:多源信息融合室内定位精度的平均偏差为0.601m、50%可能性下的圆概率误差(CEP)为0.578 m、距离均方根误差(1D RMS)为0.717 m、50%可能性下累积分布函数误差(CDF)为0.475 m,定位精度均<1 m。

With the emergence of high-precision indoor positioning technology,indoor positioning technology has become an important part of the construction of smart safety and control management in power plants.Due to the large number of metal equipment,pipelines and other complex spatial structures in the main building of the power plant,the indoor positioning accuracy is greatly affected.It is found that the multi-source information fusion indoor positioning technology can avoid such phenomenon.To evaluate the positioning accuracy of multi-source information fusion indoor positioning technology,this paper adopts a multisource information fusion indoor positioning technology integrating bluetooth,Inertial Navigation System(INS),magnetic field and map information in the actual scene of power plant main building,and verifies its accuracy level by using the example data.The test results show that:the average deviation of multi-source information fusion indoor positioning technology is 0.601 m,circular error probable(50%)is 0.578 m,one distance root mean square is 0.717 m,cumulative distribution function(50%)is 0.475 m.the positioning accuracy is less than 1 m.