基于磁场梯度张量的多磁源目标反演方法研究

项目名称： 基于磁场梯度张量的多磁源目标反演方法研究

项目编号： No.51207011

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 电气科学与工程学科

项目作者： 孟立飞

作者单位： 北京卫星环境工程研究所

项目金额： 25万元

中文摘要： 磁源反演，是指通过对空间有限点处磁场数据的测量和分析，来计算推演空间中磁源的位置和磁矩。以往的磁源反演主要采用测量磁场矢量或分量的方法，利用磁场梯度张量反演磁源是一种磁源反演的新方法。相对于磁场矢量的测量，磁场梯度张量受磁化方向影响小，其特征根和旋转不变量能更好地反演场源参数，能够排除随机噪声和远处磁源的干扰，测量精度较高。目前，基于磁场梯度张量的磁源反演方法用在单个磁源的反演方面较为有效，而在多个复杂磁源的情况下分辨能力较弱，这也是各种静磁测量、反演理论普遍面临的问题。 本项目在已有的欧拉磁源反演方法的基础上，提出基于磁场梯度张量的多静态磁源目标反演方法，同时设计出测量方法，进行软件仿真和实验验证，达到准确有效的分辨多个磁源的目的，解决多磁源反演的难题。本项目未来可应用于磁性细节测量、大面积地矿探测、复杂情况下潜艇探测等。

中文关键词： 多磁源；反演；欧拉反褶积；遗传算法；磁场梯度

英文摘要： Magnetic Source Inversion method interprets magnetic sources' position and magnetic moment information through measurement and analysis of data sets of limited points in the magnetic field. In the past, it is commonplace to employ methods involve magnetic vector or scalar in magnetic interpretation. To introduce magnetic gradient tensor (MGT) into such methods is recently favored. Comparing with magnetic vector, magnetic gradient tensor has more advantages in multi-aspects, that is not susceptible to the total magnetization. Its eigenvalues and rotational invariant can interpret source parameters more easily. Detector's orientation is not strictly restricted and contour of sources under subsurface can be well depicted. Also such methods is unsusceptible to interference from random noise or magnetic sources in the distance. At the present time, though it is efficient to use MGT methods to solve single source inverse problems, it is still far from well resolved in multi source problems, which is confronted in kinds of inverse theories. This study will investigate into the multi static magnetic sources inverse theory and measurement methods based on MGT, and also some must experiments will be performed. In such way we can discriminate multi magnetic sources precisely and solve the conundrum of multi source invers

英文关键词： Multiple Magnetic Source；Inversion；Euler Deconvolution；Genetic Algorithm；Magnetic Gradient