基于单个磁梯度计的磁目标定位方法研究

摘要

欧拉法可以实现对磁偶极子源的精确定位.通过旋转合成可以得到包含在欧拉齐次方程中的磁梯度张量,在此基础上提出了一种转动单个矢量磁梯度计实现磁目标定位的方法.建立了磁梯度计旋转探测模型,分析了模型中转动角、倾角和基线长度等参数对磁目标定位精度的影响,为转动装置的参数设置提供了参考.研究结果表明,与7个磁传感器组成的阵列探测方法相比,该旋转探测方法在靠近磁目标的区域内具有更高的定位精度.%Euler method can be used to realize the accurate positioning of magnetic dipole source.The magnetic gradient tensor data can be calculated using the magnetic field strength data,which is measured by rotating the magnetic gradiometer.A magnetic target location method based on the rotation of a single vector magnetic gradiometer is proposed.A rotating detection model of magnetic gradiometer is established.The influences of rotational angle,inclination angle and baseline length on the positioning accuracy of target are analyzed,which provides a reference for the design of rotating device.The proposed detection method has a higher positioning accuracy in the region near the magnetic target compared with the detection method using an array of seven magnetic sensors.