As the core infrastructure connecting wind power equipment and land power grid, the importance of submarine cable is becoming increasingly prominent. In recent years, with the continuous progress and in-depth research of magnetometer technology, the exploration of high-precision positioning technology of magnetic target using magnetic environment characteristics is gradually deepening. In this paper, the inversion technique is used to locate the magnetic anomaly of submarine cable routing and buried depth. First, the spatial magnetic dipole microelement model of submarine cable is established. Secondly, an inversion method based on nonlinear adaptive particle swarm evolution algorithm is proposed to invert the submarine cable route, and an inversion method based on empirical tangential characteristics is proposed to invert the submarine cable buried depth. The research results show that the accuracy error of the route inversion is 5.51% when the distance is 1 meter from the submarine cable body. The error of the cable buried depth positioning strategy at the detection distance of 150cm is 9.7%, which can provide certain application value for the submarine cable engineering route detection application.

Submarine Cable,Weak Magnetic Detection,Inversion Algorithm,Routing Detection