摘要
磁信标导航定位系统的信源主要有永磁体磁信标和通电螺线管磁信标两种,基于毕奥-萨伐尔定理提出了锥形组合结构和平面交叉组合结构的永磁体磁信标设计方案,通过与现有的单永磁体信标及正交永磁体信标进行对比,得出锥形组合结构磁信标在与平面夹角为70°时产生的磁场信号性能最佳,在二维平面内能够明显提高信号的指向性;设计磁体夹角为60°的平面交叉组合信标,改善了现有信标存在信号盲区的问题并且提高了信号的传输距离。针对平面交叉组合旋转磁信标分析一元组合信标与二元阵列组合信标产生的磁场性能,仿真结果表明,在不同属性的传播介质中阵列布设信标产生的磁场信号鲁棒性更好。利用NdFeB永磁体材料搭建信号检测分析系统,在基线为5 m,信标旋转角度差值为0时,两种信标布设方法产生的最大误差分别为3.55 nT和5.80 nT,证明了所设计的磁信标结构的实用性,为磁导航定位系统的信号传输距离有限、信号提取困难等问题提供了有效地解决方案。
The sources of the magnetic beacon navigation and positioning system mainly include the permanent magnetic beacon and the energized solenoid magnetic beacon. Based on Biot-Savart′s theorem, a permanent magnet scheme with the tapered combination structure and the plane cross combination structure is proposed. The magnetic beacon design scheme is compared with the existing single permanent magnet beacon and the orthogonal permanent magnet beacon. The magnetic field signal performance of the conical combination structure magnetic beacon is best when the angle between two planes is 70°. And the directivity of the signal in the two-dimensional plane can be significantly improved. The plane cross-combined beacon with a magnet angle of 60° is designed to address the issue of the existing signal beacons and increase the signal transmission distance. The magnetic field performance generated by the unidirectional combined beacon and the binary array combined beacon is analyzed for the plane crossing combined rotating magnetic beacon. Simulation results show that the magnetic field signal generated by array beacons is robust in the propagation media with different attributes. NdFeB permanent magnet material is used to build a signal detection and analysis system. When the baseline is 5 m and the beacon rotation angle difference is 0, the maximum errors produced by the two beacon layout methods are 3.55 nT and 5.80 nT, respectively. It proves that the proposed magnetic beacon design has practical value. The standard structure provides an effective solution to the problems of limited signal transmission distance and difficult signal extraction of the magnetic navigation positioning system.
作者
王润
杨宾峰
赵震
管桦
Wang Run;Yang Binfeng;Zhao Zhen;Guan Hua(School of Information arul Navigation,Air Force Engineering University,Xi'an 710000,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2020年第4期102-110,共9页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(51577191)项目资助。
关键词
磁定位系统
磁信标
有限元分析
优化设计
magnetic positioning system
magnetic beacon
finite element analysis
optimization design
