Research on cable monitoring and localization technology based on fluxgate sensor

The routing, depth, and location of submarine cables are the key to ensure the maintenance and inspection of submarine cables, so this paper designs a submarine cable localization system based on a dual triaxial fluxgate sensor array. The system uses the AC magnetic field method for submarine cable positioning, and the relationship between the size of the induced electromotive force generated and the distance of the sensor is analyzed by establishing the electromagnetic field model of the energized cable. In this paper, a dual triaxial fluxgate sensor array scheme is adopted, on the basis of which the spatial model of the sensor array and the sea cable is constructed, and the horizontal and vertical offsets of the sea cable relative to the center position of the array are deduced. The overall architecture of the system consists of the sensor array, the multi-channel data acquisition module and the software of the upper computer, which work together to realize the conversion, acquisition, transmission and processing of magnetic signals, and finally accurately solve the position of the sea cable. And the positioning accuracy and positioning range test, its measurement error are satisfied with the system requirements.