利用剖面测线磁场数据反演三度磁性体参数  

Inversion of the Parameters of 3D Magnetic Body with Its Magnetic Profile Lines

作　　者：卞光浪[1,2,3] 翟国君[3] 黄谟涛[3] 欧阳永忠[3] 

机构地区：[1]大连舰艇学院海测工程系 [2]91950部队 [3]海洋测绘研究所

出　　处：《武汉大学学报（信息科学版）》2012年第1期91-95,共5页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(40671161)

摘　　要：常规的格网状加密探测方式很难适用于航空手段对水下动态磁性体进行快速定位与识别,为此,尝试采用磁性体周围少量的几条测线对其进行探测,并利用改进的最小二乘法反演三度磁性体空间位置及磁性参数。根据观测值与磁矩的线性关系以及磁性体中心位置的非线性关系,对磁性体位置与磁性参数分步求解。理论模型推导过程中,顾及了地磁背景场影响和多磁性体情况,给出了相应的数据处理方法。通过实测数据验证表明,提出的方法是收敛的,能达到很高的磁性体几何及磁性参数解算精度。Normal detection mode using large area grid data is not applicable to mobile underwater target＇s localization and classification with airborne technique.Therefore,a new detection mode was proposed here only require magnetic profile lines data around the body,and the its location and physical parameters were calculated with an improved least square（LS）.For assuring the astringency of calculation result,the parameters are divided into linear parts and non-linear parts.In the calculation process,two parameter parts were figured out respectively with only three unknown parameters in non-linear equations.Considering the influence of background field and multi-sources situation,corresponding data processing methods were also put forward.The effectiveness of the suggested techniques has been illustrated by real magnetic data from a collection of environmental ferro-metallic objects.The conclusion shows that the presented approach is convergent and the calculated geometry together with physical parameters has very high precision.

关 键 词：磁性体探测 三度体 剖面测线 反演 

分 类 号：P229.2[天文地球—大地测量学与测量工程]