信标欠定时的井下人员定位算法

煤矿井下人员定位常采用3个以上信标对目标节点进行定位,这样,同时收不到3个以上信标信号的目标节点就无法采用该方法进行定位。为了对这些目标节点进行有效的定位,结合煤矿环境实际情况,提出了一种信标欠定时的井下人员定位算法。首先,利用信标节点实际位置获得的定位区域内距离误差的权值对目标节点的测距误差修正,提高定位区域内目标节点的距离测量精度。然后利用可参与定位的信标精确位置和目标节点测量的经修正后的距离量,通过坐标的平移、旋转等转换,实现目标节点的定位。仿真结果表明:该算法能够有效地提高信标欠定时目标节点的定位精度,弥补了现有基于三信标及其以上情况下目标节点定位应用中的不足。

Localization algorithm for person under coal mine in beacon nodes underdetermined circumstances

Usually more than three beacon nodes are used to achieve localization of target nodes,thus the target nodes who can＇t receive signals from three beacon nodes can not be located by this method.To cope with it and combine with practical environment under coal mine,a localization algorithm in beacon nodes underdetermined circumstances is proposed.Firstly,using distance error weight obtained by practical position of beacon nodes in region of positioning to revise ranging error of target nodes,in order to increase measurement precision of target node in locating area.Then use accurate location information of beacon nodes and the revised distance which is measured by target nodes,through coordinate translation,rotation and other conversions,the localization of target nodes is achieved finally.Simulation result show that this algorithm can effectively improve localization precision of beacon nodes in underdetermined circumstances,making up shortcomings of using more than three beacon nodes to achieve the localization.