自然环境光下的室内可见光定位系统  

Indoor visible light positioning system under natural ambient light

作　　者：左肖 邵建华[1] 沈宏杰 安爽 ZUO Xiao;SHAO Jianhua;SHEN Hongjie;AN Shuang(School of Physics and Technology,Nanjing Normal University,Nanjing 210023,China)

机构地区：[1]南京师范大学物理科学与技术学院

出　　处：《激光杂志》2019年第11期7-11,共5页Laser Journal

基　　金：教育部博士点基金资助课题(No.2013102SBJ0265)

摘　　要：考虑室内存在自然环境光的实际定位场景,提出了一种环境误差偏移修正方法。通过对自然环境下接收信号强度的偏移量进行修正,使得估计的收发端距离更加接近真实值,并通过最小二乘算法获得定位目标的位置估计。同时,探究了不同发射功率下的定位性能,从而根据定位精度选择合适功率的LED。搭建了室内可见光定位系统,实验上探究了不同高度下环境误差偏移修正方法的定位性能。对比实验表明:提出的修正方法在1.2 m×1.2 m×0.6 m的空间区域中,获得了平均定位误差3.76 cm的定位精度,极大地减小了环境光造成的误差。Considering a practical application scenario with the existence of the ambient light,an environmental er-ror offset correction method is proposed in this paper.By correcting the offset of the received signal strength in natural environment,the estimated distance between the receiver and the transmitter is closer to the true value,and the location estimation of the target is obtained by least square algorithm.Meanwhile,the positioning performance under different transmitting power is explored,and the LED with appropriate power can be selected according to positioning accuracy.An indoor visible light localization system is set up,and the positioning performance of the environmental error offset correction method at different altitudes is explored by experiments.The comparative experiments show that the proposed correction method obtains an average positioning error of 3.76 cm in the 1.2 m×1.2 m×0.6 m space area,which greatly reduces the errors caused by ambient light.

关 键 词：可见光定位 接收信号强度 定位系统 偏移修正 LED 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]