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基于仓库物流、大型超市等室内宽阔空间的几何特征,提出了一种方形的三维覆盖布设方案。分析三维覆盖率的影响因素,并依据时间到达(TOA)定位算法,使用空间几何精度因子(PDOP)来评价定位精度。最后通过模拟仿真实验,分析当传感器的间距、高度变化时,PDOP值的空间分布规律。实验结果表明,在模拟的宽阔室内环境下,通过传感器的间距和高度变化先后的PDOP值分布情况,对方形布设方案进行优化,可以得到理想的定位精度。
Based on the geometric characteristics of indoor space such as warehouse logistics and large supermarkets, a three-dimensional square layout plan is proposed. The influencing factors of three-dimensional coverage are analyzed. According to time-of-arrival (TOA) localization algorithm, the spatial precision factor (PDOP) is used to evaluate the positioning accuracy. Finally, through simulation experiments, the spatial distribution of PDOP values is analyzed when the sensor spacing and height change. The experimental results show that the ideal layout accuracy can be obtained by optimizing the square layout scheme through the distribution of the PDOP value of the sensor spacing and height changes in a wide indoor environment.