煤矿井下粉尘浓度对UWB测距精度的影响研究

Research on the influence of coal mine dust concentration on UWB ranging precision

煤矿井下综掘工作面环境恶劣,粉尘浓度大,利用超宽带(UWB)进行定位时易受到粉尘的干扰,UWB测距会存在一定误差,从而定位精度不能达到煤矿智能化需求。针对该问题,分析了UWB测距原理,指出影响UWB测距精度的主要因素是多径效应与非视距传播,而多径效应与非视距传播的产生与粉尘浓度密切相关,通过实验探讨了煤矿井下粉尘浓度对UWB测距精度的影响。实验结果表明,随着粉尘浓度增加,UWB测距误差增大,且UWB测距误差增速加快。

The environment of the fully mechanized working face in coal mines is harsh and the dust concentration is high.When ultra wide band(UWB)is used for positioning,it is easy to be interfered by dust.UWB ranging will have certain errors,so the positioning precision cannot meet the requirements of intelligent coal mines.To order to solve this problem,the principle of UWB ranging is analyzed,and it is pointed out that the main factors affecting the precision of UWB ranging are multipath effect and non-line-of-sight propagation.The generation of multipath effect and non-line-of-sight propagation is closely related to dust concentration,and the influence of dust concentration on the precision of UWB ranging in coal mines is explored through experiments.The experimental results show that the UWB ranging error increases as the dust concentration increases,and the growth rate of UWB ranging error accelerates.