Geomagnetic detection method for submarine cable

Abstract

The invention discloses a geomagnetic detection method for a submarine cable, and relates to the technical field of submarine detection. The method is applied to a detection control end, and comprises the steps of S01 controlling an underwater robot provided with a proton magnetometer to perform preliminary detection, and determining preliminary cable trend and preliminary position information; S02 according to the preliminary position information, controlling an underwater robot provided with a proton magnetometer and two fluxgate magnetometers to enter water, based on a geomagnetic total field, controlling the underwater robot to drive to the position above the cable, and determining specific position information of the cable; based on an X-axis component gradient value obtained by the fluxgate magnetometers, controlling the heading direction of the underwater robot to move along the trend of the preliminary cable; S03 according to the specific position information, controlling the underwater robot provided with the proton magnetometer and two fluxgate magnetometers to enter water; and based on the Z-axis component value of the geomagnetic total field and the underwater depth data of the underwater robot, judging whether the submarine cable has a fault and the position of a fault point. The method is accurate in detection and simple to implement.

Description

technical field [0001] The invention belongs to the technical field of submarine detection, and in particular relates to a geomagnetic detection method of a submarine cable. Background technique [0002] The detection, identification and positioning of submarine cables is a recognized technical problem in the field of ocean engineering. Traditionally, manual observation is mainly done by divers. In recent years, with the rapid development of underwater robot technology, the technical method of automatic inspection through underwater robots carrying various loads of sound, light, and magnetism is attracting attention. However, since submarine cables are mostly laid below the surface of the seabed, optical methods and most acoustic methods are not effective. Shallow profiling is an acoustic method that can detect below the surface, but is limited by the resolution of the acoustic detection due to the limited diameter of the cable. The method based on geomagnetic anomaly fiel...

AI Technical Summary

Problems solved by technology

However, since submarine cables are mostly laid below the surface of the seabed, optical methods and most acoustic methods are difficult to work

Shallow profiling is an acoustic method that can detect below the surface, but is limited by the resolution of the acoustic detection due to the limited diameter of the cable

The method based on geomagnetic anomaly field inversion is currently the most promising method to detect submarine buried cables, but because the research on its detection process and detection method is not deep enough, there are still signals interfered by complex background fields in practical applications , the reliability of the suspected abnormality is not high, etc.

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