基于白光LED的室内行走目标三维定位方法

3D positioning method of indoor walking target based on white light LED

为了解决现有可见光室内动态目标定位方法中出现的阴影遮蔽、保密性差、光源能耗量大且相互干扰等实际问题,提高定位精度,提出一种基于白光LED的室内行走目标定位方法。分析了室内行走特点,建立基于固定的复眼接收器、SiO_2透明地板和光束位移的定位模型,对两处最优复眼透镜进行虚拟直射变换,实现行走目标的三维定位。该方法仅用单一LED发射器即可精确定位,节省了大量能耗。同时,有效缩短了光束传播距离,提高了光功率,具有良好的保密性和泛化性。实验表明:动态目标定位方法监测位置误差率能够限制在3.5%以内;当对5个以上行走目标定位时,若相邻接收器间距与接收器覆盖半径相等,则定位精度最高。

For resolving the problems including shadowing, poor secrecy, expensive consumption, and excessive interference in visible light indoor dynamic target positioning method with improving accuracy, an indoor walking target 3D positioning method was proposed based on white light LED. According to the walking characteristic, the model was established with fixed ommateum receivers, SiO2 transparent floor, and beam displacement （BD）. Then the virtual direct transform （VDT） was actualized with two optimum ommateum lenses for 3D position. Indeed, the proposed method used only one LED emitter for saving energy. Also, it obtained the shorter beam propagation distance, improved optical power, and better confidentiality and generalization. Experiment shows that with the proposed method the error rate can be limited within 3.5%. And more than 5 targets can be most effectively positioned, while the distance between adjacent receivers is equal to the coverage radius from each one.