摘要
针对现有Convex算法定位误差和波动范围较大以及铀尾矿库放射性核素污染的问题,提出一种到达时间差改进凸规划的铀尾矿库无线传感器网络定位算法(CLAT)。首先在铀尾矿库监测模型的基础上,利用TDOA测距法求得未知节点与其通信范围内各锚节点间的距离,并对这些锚节点进行筛选,使锚节点重叠区域面积最小化。通过比较未知节点与各锚节点的距离,使未知节点所在区域范围缩小。其次,求得未知节点所在多边形区域的顶点坐标,结合Convex算法进一步得到未知节点的估计位置坐标。最后通过Matlab模拟仿真分析,与经典Convex算法相比,CLAT算法定位精度提高了27%,定位误差波动范围减少了26%。这一结果表明,Convex算法有效降低了定位误差并提升了定位稳定性,可满足铀尾矿库实时监测的定位需求。
In view of the large positioning error and fluctuation range of the existing Convex algorithms,and radionuclide pollution in uranium tailings reservoir,an improved convex programming wireless sensor network(WSN)localization algorithm based on time difference of arrival(TDOA)(hereinafter referred to as CLAT)is proposed for uranium tailings reservoir.On the basis of the monitoring model of uranium tailings reservoir,the distance between unknown nodes and anchor nodes in their communication range is obtained by TDOA ranging method,and these anchor nodes are screened to minimize their overlapping area.By comparing the distance between the unknown nodes and each anchor nodes,the area where the unknown nodes are covered is reduced.The vertex coordinates of the polygon region where the unknown nodes are located are obtained.Furthermore,the estimated position coordinates of the unknown nodes are obtained in combination with the Convex algorithm.Simulation and analysis were carried out on Matlab.In comparison with the classic Convex algorithm,the positioning accuracy of the CLAT algorithm has been increased by 27%,and its fluctuation range of positioning error has been reduced by 26%.This results show that the Convex algorithm can effectively reduce the positioning error and improve the positioning stability,which can meet the real-time monitoring and positioning needs of the uranium tailings reservoir.
作者
余修武
黄露平
刘永
余昊
李莹
YU Xiuwu;HUANG Luping;LIU Yong;YU Hao;LI Ying(School of Resource&Environment and Safety Engineering,University of South China,Hengyang 421001,China;Hunan Province Engineering Research Center of Radioactive Control Technology in Uranium Mining and Metallurgy,Hengyang 421001,China;Hunan Province Engineering Technology Research Center of Uranium Tailings Treatment,Hengyang 421001,China)
出处
《现代电子技术》
2021年第21期65-69,共5页
Modern Electronics Technique
基金
国家自然科学基金项目(11875164)
湖南省研究生科研创新项目资助(QL20210218)
湖南省重点研发计划项目(2018SK2055)
湖南省市联合自然科学基金项目(2021JJ50093)。
关键词
铀尾矿库
定位算法
凸规划定位
到达时间差
锚节点筛选
节点定位
仿真分析
uranium tailings reservoir
localization algorithm
convex programming localization
TDOA
anchor node screening
node localization
simulation analysis
