运动海水磁场分析与检测方法

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This paper made a study of the mechanism of the magnetic field caused by flowing seawater and established a numerical model for oceanic magnetic field due to ocean waves and currents. Accor- ding to the characters of the magnetic field, a detecting method of harmonic wavelet was proposed. The method can fully use Harmonic wavelet packet transform for infinite refinement of any frequency and effectively analyzes the frequency domain character of the induced oceanic magnetic field. Simula- tion results show that the method is useful both for compensating the magnetic field caused by flowing seawater and for the long-range magnetic target detection.研究了运动海水产生磁场的机理，建立了两种关注的海水运动形式即海浪、海流引起感应磁场的数值仿真模型。通过仿真实验得到了运动海水磁场信号特征，并根据信号特征提出了基于谐波小波的检测方法。结果表明：该方法充分使用了谐波小波对信号频率无限细分的能力，有效地分析了海洋磁场频率特征，为补偿运动海水磁场信号提供了依据，同时为实现远程磁性目标探测提供了条件。