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水下掩埋目标在磁异常探测中可以视作磁偶极子,分析目标产生的异常磁场与地磁场的关系,仿真得到目标的空间磁场和磁异常信号。针对实际探测中信噪比较低的问题,应用正交基分解检测方法大幅度提升信噪比,使目标磁异常信号易于检测。
Underwater buried target can be regarded as magnetic dipole in magnetic anomaly detection. The relationship between the abnormal magnetic field generated by the target and the geomagnetic field is analyzed, and the target spatial magnetic field and magnetic anomaly signal are simulated. Aiming at the problem of low signal-to-noise ratio in actual detection, the method of orthogonal base decomposition is used to improve the signal-noise ratio and make the target magnetic anomaly signal easy to detect.