Single cabin ball combined broadband submarine seismograph

Abstract

A single-compartment combined-sphere broad-frequency submarine seismometer, which comprises a submersion coupling frame, a seismometer compartment, a function compartment and an unhooking mechanism. The submersion coupling frame, which is located at the bottom of the submarine seismometer, is provided with a rigid ring to accommodate the seismometer compartment and thereby allow the sealed seismometer compartment (48) inside said seismometer compartment to sit on the seabed directly. The seismometer compartment comprises a bell-shaped protective cover (49) and the sealed seismometer compartment (48). The bell-shaped protective cover (49) opens downwards. The upside of the sealed seismometer compartment (48) is suspended from the top inner surface of the bell-shaped protective cover (49) by multiple cables, and the underside of the sealed seismometer compartment (48) extends beneath the opening of the bell-shaped protective cover (49) to sit flush with the underside of the submersion-coupling frame. The unhooking mechanism is provided on the function compartment (36) and is connected fixedly with the rim of the submersion-coupling frame by a fusible tension steel wire (24), thus fixing the function compartment (36) and the seismometer compartment to the rigid ring at the center of the submersion coupling frame. The seismograph is installed in the sealed seismometer compartment (48) and is thus seated on the seabed directly, whereby the severe distortion of horizontal signals recorded by the submarine seismograph can be effectively overcome without the use of multilayer coupling structures.

Description

technical field [0001] The invention relates to a single-chamber spherical combined seabed seismograph, which relates to the technical field of seabed natural earthquake observation. Background technique [0002] The Institute of Geology and Geophysics of the Chinese Academy of Sciences is the main unit for the development of submarine seismometers in my country, and has undertaken most of the development tasks of submarine seismometers in China. During the Eleventh Five-Year Plan period, in the national major scientific research equipment development project supported by the Ministry of Finance, the seven-channel multi-functional broadband submarine seismograph independently developed by the Institute of Geology and Geophysics, Chinese Academy of Sciences broke the monopoly of foreign countries on my country's submarine broadband seismographs. It has been successfully applied in the South China Sea, the Yellow Sea, and the Bohai Sea, and has obtained a large amount of valuab...

AI Technical Summary

Problems solved by technology

In order to provide sufficient buoyancy, a multi-ball structure (4 to 8 cabin balls) must be used, which makes its weight reach more than hundreds of kilograms, and the production cost is also greatly increased. The price of a single unit is close to 1 million yuan

At the same time, the difficulty of the construction of its sea recycling has also increased.

[0008] To sum up, at present, the submarine seismograph developed in the early stage in China adopts an integrated structure in which the seismometer is installed in a glass cabin ball, which cannot well resist the impact of seawater flow on it, and the recorded signal is seriously distorted.

However, the structure of foreign broadband submarine seismographs is not suitable for my country's current economic conditions and observation conditions due to weight and cost.

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