| 基于Laplace法的磁性球体参数确定 |
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| 引用本文： | 卞光浪,翟国君,刘雁春,黄谟涛.基于Laplace法的磁性球体参数确定[J].地球物理学报,2011,54(3):787-792. |
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| 作者姓名： | 卞光浪 翟国君 刘雁春 黄谟涛 |
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| 作者单位： | 1. 海军大连舰艇学院海测工程系,大连 116018;
2. 海军海洋测绘研究所,天津 300061 |
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| 摘 要： | 解析信号法被广泛应用于磁性目标平面位置确定中,然而,数值计算表明:斜磁化情况下,解析信号模极大值与磁性目标中心平面位置之间存在较大的偏差,最大可达探测深度的30%,从而制约了该方法在航空磁测或水深较深区域的应用.从理论上推导了磁性球体磁异常经拉普拉斯算子运算后信号(简称"拉普拉斯信号")表达式,分析了其具有的物理性质,...
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| 关 键 词： | 磁性目标探测 Laplace法 解析信号法 球体模型 |
| 收稿时间： | 2010-06-10 |
The parameters determination of magnetic spherical object based on Laplace approach |
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| BIAN Guang-Lang,ZHAI Guo-Jun,LIU Yan-Chun,HUANG Mo-Tao.The parameters determination of magnetic spherical object based on Laplace approach[J].Chinese Journal of Geophysics,2011,54(3):787-792. |
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| Authors: | BIAN Guang-Lang ZHAI Guo-Jun LIU Yan-Chun HUANG Mo-Tao |
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| Institution: | 1. Department of Hydrography and Cartography, Dalian Naval Academy, Dalian 116018, China;
2. Naval Institute of Hydrographic Surveying and Charting, Tianjin 300061, China |
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| Abstract: | Analytic signal approach is widely applied in obtaining source locations through the maxima of the amplitude of the analytic signal (AAS). However, the maximum value of the AAS for a sphere model does not coincide with the object epicenter exactly. The error in the horizontal location increases with the object depth, reaching a maximum of 30% of the depth. Thus, the approach is not suitable for the condition of airborne detection or deep depth. The Laplacian signal expression of magnetic sphere magnetic anomaly was deduced theoretically. Based on its characteristic, Laplace approach is proposed to locate the magnetic object, and its horizontal location error calculated by simulation is less than 4.3% of the depth when the inclination is more than 30°, having the evident advantage over AAS approach. The depth and magnetism parameters calculating methods have also been brought forward, and simulation example indicates that calculated result and real value matches perfectly if exact spatial position is known. |
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| Keywords: | Magnetic object detection Laplace approach AAS approach Sphere model |
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