用磁场极值信号定位磁源的方法与实验

通过数字仿真和实验的方法研究了一种基于等磁场图板值信号的等效磁偶板子（Equivalent Magnetic Dipole,EMD）源重构方法,给出了磁偶板子源位置坐标的计算公式.用磁偶极子源模型产生的磁场数据检验了该方法的源定位精度.结果表明：当阵列测点间距为1mm,令方向磁矩为0时,单磁偶极子源定位的误差小于1mm;双磁偶板子定位误差在,,方向的均值分别为4.6mm,7.8mm,5.3mm.分析了双磁源定位的误差问题,还对用9通道低磁场强度检测实验系统采集的单和双磁偶板子实验数据的源定位结果进行了分析与比较.

The Method and Experimental Study of Extreme Signal of Magnetic Field For Magnetic Source Localization

In this paper,a source reconstruction method of equivalent magnetic dipole based on extreme signal of magetic field map was studied by mathematical simulation and experiment,and the formulas for calculating the location coordinates of magnetic dipole were deduced.The source location accuracy of this method was verified by magnetic field data which produced by magnetic dipole source model.The results showed that the location error of single magnetic dipole was less than lmm when the spacing between measurement points was 1mm and z component of magnetic moment was 0,the x-component,y-component and z-component of location error of double magnetic dipoles were 4.6mm,7.8mm and 5.3mm,respectively.The location error of double magnetic sources was discussed,and the source location results of single and double magnetic dipoles,which were obtained by using experimental data detected by a 9-channel low intensity magnetic field detection system,were analyzed and compared.