Broadband ocean bottom seismograph

Abstract

The invention discloses a broadband ocean bottom seismograph comprising two protecting shells and a connecting plate, wherein the two protecting shells are respectively fixed on both ends of the connecting plate; a sealed instrument storehouse ball and a sealed battery storehouse ball are respectively installed in the two protecting shells; a battery and an acoustic communication circuit are installed in the battery storehouse ball; two sealed storehouse balls are electrically connected by a cable; a gimbal for keeping the seismograph in a level state is arranged in the instrument storehouse ball and provided with a data collector and a seismograph; an electro erosion releasing mechanism for releasing a coupling frame is fixed on the connecting plate; the coupling frame for supplying downforces for the seismograph is positioned below the connecting plate and connected with the electro erosion releasing mechanism by wire ropes; and a weighting frame is connected below the coupling frame by an iron chain. The broadband ocean bottom seismograph can be used in deep ocean, and the observed broadband range is 40 s to 40 Hz; and the broadband ocean bottom seismograph is suitable not onlyfor viewing the ocean bottom natural earthquake, but also for viewing ocean bottom manmade earthquake source.

Description

technical field [0001] The invention relates to a broadband submarine seismograph, which belongs to the technical field of marine seismic observation. Background technique [0002] At present, before the 1990s, the mainstream method for detecting seabed geophysical information was artificial earthquake. Seismic waves can travel long distances in seawater, which enables signal acquisition to be carried out on the sea surface. However, from the perspective of equipment, even if seismic waves can be observed on the sea surface, for the measurement of natural seismic fields (non-artificial seismic sources), due to the long measurement time, it is necessary to solve the problem of long-term fixed placement of equipment. Obviously, this problem is difficult to solve at sea in a turbulent ocean environment. Contents of the invention [0003] In order to meet the needs of my country's broadband submarine seismic observation, improve the level of my country's marine natural gas h...

AI Technical Summary

Problems solved by technology

However, from the perspective of equipment, even if seismic waves can be observed on the sea surface, for the measurement of natural seismic fields (non-artificial seismic sources), due to the long measurement time, it is necessary to solve the problem of long-term fixed placement of equipment

Obviously, in a turbulent ocean environment, this problem is difficult to solve at sea

Images