本文關鍵詞： 磁梯度張量 傾斜角 多磁源目標 反演　出處：《上海交通大學學報》2017年05期 　論文類型：期刊論文

【摘要】：針對傳統(tǒng)磁源反演對區(qū)域內(nèi)同時存在多個復雜磁源時分辨能力較弱的問題,提出了磁梯度張量測量下的目標反演方法.首先基于磁梯度張量分量計算的改進傾斜角實現(xiàn)區(qū)域內(nèi)磁源目標個數(shù)和初始分布區(qū)域的估計;然后選擇不同大小的滑動窗口,利用Helbig方法計算測量區(qū)域內(nèi)各點的磁化方向,每個初始分布區(qū)域內(nèi)磁化方向變化最小的測量點對應的水平位置即為磁源目標的水平位置,且該點的磁化方向即為該磁源目標的總磁化方向;最后利用磁源目標豎直方向上磁變換模量的相互關系,實現(xiàn)了磁源目標空間垂向位置和磁矩大小的估計.仿真結(jié)果表明,該方法可準確估計磁源目標的水平位置,豎直位置估計誤差小于11.67%,磁化方向估計誤差小于6.1%;多個磁鐵目標的反演實驗驗證了所提方法的實用性,水平和豎直位置估計誤差分別小于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.
【作者單位】： 中國空氣動力研究與發(fā)展中心高速所;軍械工程學院七系;中國人民解放軍63612部隊;
【基金】：國防科研項目資助
【分類號】：E91;O441.2

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本文編號：1527770