基于差分的磁偶极子单点张量定位方法

摘要

The magnetic dipole positioning method which uses single-point measurement of the magnetic field vector and the magnetic tensor data are strongly interfered by the geomagnetic field, which greatly limits its usefulness. An magnetic dipole single-point tensor positioning based on the difference method was proposed. This method used differential mode, and could eliminate the geomagnetic field and other common-mode interference. Simulation results showed that,in the presence of geomagnetic method,the original method was basically impossible to achieve the position, but this method had a higher positioning accuracy at the distance of 17. 320 5 m with the positioning error of 0. 002 3 m.%采用单点测量的磁场矢量及磁张量数据进行磁偶极子定位的方法,受地磁场干扰大,极大地限制了其实用性.为此,提出基于差分的磁偶极子单点张量定位方法,设计出磁张量测量系统.该方法采用差分方式,消除地磁场及其他共模干扰.仿真结果表明:在地磁场存在的情况下原方法基本上无法实现定位,而该方法则具有较高的定位精度,当探测距离为17.3205 m时,定位误差仅有0.0023 m.