基于双十字形测量结构的磁信标定位方法  

Magnetic Beacon Positioning Method Based on Double Cross-Shaped Measuring Structure

作　　者：赵震 杨宾峰[1] 王润 管桦[1] ZHAO Zhen;YANG Binfeng;WANG Run;GUAN Hua(Information and Navigation College,Air Force Engineering University,Xi’an Shaanxi 710000,China)

机构地区：[1]空军工程大学信息与导航学院,陕西西安710000

出　　处：《传感技术学报》2021年第1期70-74,共5页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金项目(51577191)。

摘　　要：为解决地磁场对磁信标定位影响较大的问题,首先提出了一种两点式磁梯度张量解算运动载体位置的定位算法,然后通过对定位算法进行分析,设计出测量两点磁梯度张量的双十字形测量结构,最后建立关于以位置坐标为参数的非线性方程,利用粒子群算法得出目标位置的最优解。仿真结果表明磁信标与运动载体在单一坐标轴上的距离大于25 m时,磁传感器精度和信标磁矩对定位误差影响较大,在环境磁噪声影响下,当信噪比低于80 dB时,定位误差显著增大,基于双十字形测量结构的磁信标定位方法可有效消除地磁场和其他恒定磁场的影响。In order to solve the problem that the geomagnetic field has a greater impact on the positioning of the magnetic beacon,a two-point MGT is proposed to calculate the position of the moving carrier.Then,by analyzing the positioning algorithm,a double cross-shaped measurement structure is designed to measure the MGT at two points.,finally establishes a nonlinear equation about the position coordinates as parameters,and uses the particle swarm algorithm to obtain the optimal solution of the target position.The simulation results show that when the distance between the magnetic beacon and the moving carrier is greater than 25 m on single axis,the accuracy of the magnetic sensor and the magnetic moment of the beacon have a greater impact on the positioning error.Under the influence of environmental magnetic noise,when the signal-to-noise ratio is lower than 80 dB,the positioning error increases significantly.The magnetic beacon positioning method based on the double cross-shaped measurement structure can effectively eliminate the influence of the geomagnetic field and other constant magnetic fields.

关 键 词：磁信标定位 磁梯度张量 测量结构 粒子群算法 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] X853[自动化与计算机技术—计算机科学与技术]