Ocean bottom seismograph

Abstract

The invention belongs to the technical field of ocean equipment, and particularly discloses an ocean bottom seismograph, which comprises a shell, an instrument mounting frame, a monitoring device and an auxiliary recovery device, and the instrument mounting frame comprises a mud blocking plate and a lifting lug; the monitoring device comprises an instrument bin device and an electromagnetic acoustic release device, the electromagnetic release device is provided with a permanent magnet and an electromagnet, and the magnetic force of the electromagnet and the magnetic force of the permanent magnet repel each other; and according to the ocean bottom seismograph adopting the structural design, the counterweight assembly can be efficiently released through the arrangement of the electromagnetic release device, instrument recovery is achieved, meanwhile, electric energy can be saved, and only when the instrument needs to be recovered, the counterweight assembly needs to be released, and then the electromagnet needs to be powered. Besides, through the arrangement of the shell and the instrument mounting frame, various problems caused by the adoption of a traditional glass floating ball mode design are effectively solved, then the resistance of the ocean bottom seismograph is greatly reduced, the noise reduction level is effectively improved, and then the quality of collected data is improved to a certain extent.

Description

technical field [0001] The invention relates to the technical field of marine equipment, in particular to a seabed seismograph. Background technique [0002] Short-period submarine seismometers are widely used in the exploration and development of oil and gas resources, and the detection of the earth's internal structure. According to the different observation frequency bands of submarine seismographs, submarine seismographs can be divided into: broadband submarine seismographs, short-period submarine seismographs, etc. Broadband submarine seismographs are usually used to observe vibrations generated by active sources (natural earthquakes), while short-period submarine seismographs are more conducive to the observation of passive sources (artificial seismic sources). [0003] The working process of the submarine seismograph is: the experimenter reaches the predetermined position through the experimental ship, and after the instrument completes the inspection and realizes GP...

AI Technical Summary

Problems solved by technology

[0004] At present, the overall structure of the submarine seismograph mainly uses glass floating balls to provide buoyancy and serve as pressure chambers. All devices are placed inside the glass floating balls; the sinking coupling frame is released by electrochemical corrosion to realize instrument recovery. Its structure is compact and glass Floating balls have the dual functions of providing buoyancy and pressure chambers, saving costs, but limited by the particularity of the glass material, there are defects such as fracturing, leakage, and inconvenient installation, and the submarine seismograph designed with floating balls has a large volume, It cannot be well coupled with the seabed plane, the fluid resistance is large, and it is also greatly affected by the bottom flow of the seabed, which in turn makes the noise larger and cannot collect high-quality data

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