Research on Underwater Ferromagnet Positioning Method of Geomagnetic Anomaly

Magnetic anomaly technology, which can detect and analyzes magnetic anomalies caused by the magnetic characteristics of a target, and then locates the target in real time, is an ideal way to achieve realtime, continuous, covert and precise positioning of underwater targets. This paper explores a two-point target location identification method based on geomagnetic magnetic anomalies, that uses fluxgate to detect the magnetic field intensity with and without the target in the geomagnetic field, combined with a thin-layer current loop model to calculate the magnetic anomaly intensity, and uses the integral equation method and two-point location to exclude singular solutions to calculate out the target three-dimensional spatial coordinate values. Finally, the calculation results are compared with the experimental data to verify the correctness and feasibility of the method.