中文摘要：

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17．3205m时，定位误差仅有0．0023m。

英文摘要：

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 use fulness. 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 commo~mode interference. Simulation results showed that, in the presence of geomagnetic method, the original method was basically impos- sible 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.