Anti-trawl seabed base of ocean bottom seismograph

Abstract

The invention discloses an anti-trawl seabed base of an ocean bottom seismograph. The anti-trawl seabed base of the ocean bottom seismograph comprises placing devices, an OBS, a sinking coupling frame, a floating body cabin, a floating body, an acoustic releaser, a recycling rope cabin, a recycling rope, a main cabin, a square vertical shaft, an outer cover of an octagonal prismaid shape and a bottom-sitting frame. The main points are that the main cabin is formed by corresponding connection of the bottom of the outer cover of the octagonal prismaid shape and the bottom-sitting frame, the recycling rope cabin, the placing devices and the square vertical shaft are fixed on the bottom-sitting frame, the square vertical shaft and the recycling rope cabin are arranged at the center and one side of the main cabin respectively, the acoustic releaser is fixed in the center of the floating body, the floating body is arranged in the floating body cabin on the top of the recycling rope cabin, and the recycling rope connected with the floating body is connected with the recycling rope cabin. The sinking coupling frame that fixes the OBS is fixed in the center of the square vertical shaft, and is connected with side edge U-shaped rings of the placing devices through flexible connecting devices. The anti-trawl seabed base of the ocean bottom seismograph has the advantages of having high system security, can resist movement and impact damage of operation of a trawler, and satisfies the requirements for long-term, fixed point, continuous, and automatic monitoring in severe environment.

Description

technical field [0001] The invention relates to a seabed foundation, in particular to a trawling-resistant seabed foundation for a seabed seismometer. The invention belongs to the field of marine technical monitoring. Background technique [0002] Ocean Bottom Seismograph, hereinafter referred to as "OBS", is a seismograph designed for observing micro-vibrations caused by earthquakes and other crustal tectonic events on the seabed. At present, the deployment and recovery method of the submarine seismograph is to install the OBS directly on the sinking coupling frame, connect and fix it through the acoustic release device, and put the OBS into the seawater from the sea surface together with the sinking coupling frame. Since the overall weight is much greater than its buoyancy in seawater, it will sink to the bottom of the sea. When recovering, the surface deck unit sends a release command. After receiving the release command, the acoustic releaser activates the release mech...

AI Technical Summary

Problems solved by technology

However, when this structure encounters fishing boat trawling in shallow water near the shore, it will generate a large frictional force with the trawl, which will cause the OBS to dump, shift or even be lost, and cannot meet the long-term, fixed-point underwater requirements. , the need for automatic monitoring

At the same time, this kind of structure has a small span, and it is easy to sink into the sediment in the environment with complex seabed geological conditions such as sandy and muddy, which will cause the equipment to be covered; In a large area, it is also easy to cause the device to tilt and collapse due to the hollowing out of the seabed sediment, which makes the coupling between the OBS and the seabed insufficient and reduces the measurement accuracy of the OBS.

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