基于倾斜角和Helbig方法的多磁源目标反演技术

发布时间：2018-02-23 22:02

本文关键词： 磁梯度张量倾斜角多磁源目标反演　出处：《上海交通大学学报》2017年05期 　论文类型：期刊论文

【摘要】：针对传统磁源反演对区域内同时存在多个复杂磁源时分辨能力较弱的问题,提出了磁梯度张量测量下的目标反演方法.首先基于磁梯度张量分量计算的改进倾斜角实现区域内磁源目标个数和初始分布区域的估计;然后选择不同大小的滑动窗口,利用Helbig方法计算测量区域内各点的磁化方向,每个初始分布区域内磁化方向变化最小的测量点对应的水平位置即为磁源目标的水平位置,且该点的磁化方向即为该磁源目标的总磁化方向;最后利用磁源目标竖直方向上磁变换模量的相互关系,实现了磁源目标空间垂向位置和磁矩大小的估计.仿真结果表明,该方法可准确估计磁源目标的水平位置,竖直位置估计误差小于11.67%,磁化方向估计误差小于6.1%;多个磁铁目标的反演实验验证了所提方法的实用性,水平和竖直位置估计误差分别小于8.33%和15.79%.
[Abstract]:In view of the problem of weak resolution of multiple complex magnetic sources in the region by traditional magnetic source inversion, In this paper, a target inversion method based on the measurement of magnetic gradient Zhang Liang is proposed. Firstly, the number of magnetic source targets and the initial distribution region are estimated based on the improved tilt angle of the magnetic gradient Zhang Liang component, and then the sliding windows of different sizes are selected. The Helbig method is used to calculate the magnetization direction of each point in the measurement area. The horizontal position of the measuring point corresponding to the smallest change of the magnetic direction in each initial distribution region is the horizontal position of the magnetic source target. The magnetization direction of the point is the total magnetization direction of the magnetic source target. Finally, the vertical position and magnetic moment of the magnetic source target are estimated by using the mutual relation of the magnetic transformation modulus in the vertical direction of the magnetic source target. This method can accurately estimate the horizontal position of the magnetic source target, the vertical position estimation error is less than 11.67 and the magnetization direction estimation error is less than 6.1. The error of horizontal and vertical position estimation is less than 8.33% and 15.79, respectively.
【作者单位】：中国空气动力研究与发展中心高速所;军械工程学院七系;中国人民解放军63612部队;
【基金】：国防科研项目资助
【分类号】：E91;O441.2

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