Method and device for detecting buried depth of submarine cable in shallow water area

Abstract

The embodiment of the invention discloses a method and device for detecting the buried depth of submarine cables in shallow water areas. The method includes: obtaining the average sound velocity and draft during the navigation process of the survey ship according to the specified ship speed and the navigation pre-layout survey line; The draft is input to the depth sounder for water depth measurement to obtain instantaneous water depth data and positioning data; use side-scan sonar to conduct seabed landform surveys and obtain side-scan sonar data; use shallow strata profilers to lay designated encrypted cable detection lines to obtain Profile data; draw track map; generate bathymetric map; generate topographic map; obtain cable status profile map including submarine cable burial depth; analyze submarine cable route according to track map, bathymetry map, topographic map and cable status profile map The result map of submarine cable burial can be drawn in one frame, which greatly reduces the cost of traditional submarine cable burial survey operations, and also improves the safety of operations, and realizes the investigation of submarine cable burial depth in shallow water areas.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of submarine cable detection, and in particular to a method and device for detecting buried depth of submarine cables in shallow water areas. Background technique [0002] In recent years, in shallow water areas, such as the Bohai Sea, submarine cables have often been hung up by anchors, causing great economic losses to users. This happened many times. On the one hand, the number of construction ships gradually increased and anchored at will, which constituted an external hidden danger that the cables were hung up. On the other hand, in the survey project outside the conventional submarine pipe and cable, due to the small diameter of the submarine cable, conventional acoustic survey equipment cannot accurately distinguish, and due to the shallow water depth in the Bohai Sea, tugboats or DP ships equipped with underwater robots (ROV) etc. The electromagnetic survey method cannot be carr...

AI Technical Summary

Problems solved by technology

[0002] In recent years, in shallow water areas, such as the Bohai Sea, there are often cases where submarine cables are hung up by anchors, causing great economic losses to users

This happened many times, on the one hand, due to the gradual increase of construction ships and their anchoring at will, which constituted an external hidden danger of cables being hung up

On the other hand, in the survey project outside the conventional submarine pipe and cable, due to the small diameter of the submarine cable, conventional acoustic survey equipment cannot accurately distinguish, and due to the shallow water depth in the Bohai Sea, tugboats or DP ships equipped with underwater robots (ROV) etc. The electromagnetic survey method cannot be carried out normally, so it is difficult to detect the burial depth of cables in the Bohai Sea area, resulting in the lack of data on the burial depth of submarine cables in the Bohai Sea area, and the cables with hidden dangers cannot be managed and maintained in a timely manner, which affects the safe operation of submarine cables poses a great risk

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