基于最小二乘的磁性目标磁矩确定方法

磁性目标产生明显的磁异常是磁探测的前提,而磁性目标的磁异常分布主要取决于目标磁矩。针对常用的消元法确定磁矩未能顾及目标磁矩测量过程中误差的影响,基于磁矩测量模型,提出采用最小二乘法来确定磁性目标磁矩,并通过仿真实验和实测数据验证方法的有效性。研究结果表明:最小二乘法有效地利用了磁矩测量中的测量数据,可以有效减弱测量中误差对目标磁矩各分量的影响。为了解决实际测量中目标磁矩分量计算结果的不稳定性问题,建议增加观测数据。研究结果可为磁性目标的有效探测提供理论依据。

Determining Magnetic Moment of the Magnetic Target with Least Squares Method

Magnetic targets producing obvious magnetic anomalies are prerequisites for magnetic detection,and the magnetic anomaly distribution of magnetic targets mainly depends on the target magnetic moment.In order to overcome elimination method not considering the influence of error in target magnetic moment measurement,the least square method is proposed for determining target magnetic moment based on the magnetic moment measurement model.This method is verified by simulation data and the measured data.The research results show that the least squares method effectively utilizes the measurement data in magnetic moment measurement,which can effectively reduce the influence of the error in the measurement on the components of the target magnetic moment.In order to improve the stability of the result of the target magnetic moment component in actual measurement,it is recommended to increase the observation data.The research results can provide a theoretical basis for effective detection of magnetic target.