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 buried depth of a submarine cable in a shallow water area, wherein the method comprises the steps: obtaining the average sound velocity and the immersion depth in a navigation process of a surveying vessel according to a specified vessel speed and a navigation pre-laid surveying line; inputting the average sound velocity and the immersion depth into a depth finder, carrying out water depth measurement, and obtaining instantaneous water depth data and positioning data; carrying out submarine landform investigation by side-scan sonar, and thus obtaining side-scan sonar data; arranging a specified encrypted cable detection line by using a shallow profiler to obtain profile data; drawing a track map; generating a bathymetric map; generating a landform map; and obtaining a cable state profile map containing the buried depth of the submarine cable. According to the track map, the bathymetric map, the landform map and the cable state profile map, the submarine cable route is subjected to framing drawing to obtain a submarine cable burial result map, the cost of traditional submarine cable burial depth survey operation is greatly reduced, meanwhile, the operation safety is improved, and the submarine cable burial depth survey operation in the shallow water area is achieved.

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...

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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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