A Method for Measuring the Signal Amplitude of a Seabed Sedimentary Area Seismometer
A technology of seabed deposition and measurement methods, applied in the fields of seismology, geophysical measurement, seismology, etc. for areas covered by water, which can solve the problem of paths that do not take into account the propagation of seabed seismic waves, reduce the detection ability of seismometers, affect the impact of The effect of seismometer coupling, etc.
Active Publication Date: 2021-01-05
HEFEI XINWEI INSTR
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Problems solved by technology
In addition, the coupling frame is placed directly on the silt layer, without considering the propagation path of the seabed seismic wave, and the placement of the seismometer is unreasonable
These all affect the coupling effect of the seismometer and seriously reduce the remote detection ability of the seismometer
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Embodiment 1
[0079] The invention can be used to improve the signal coupling capability of the seismometer in the seabed sediment layer area, including the design and manufacture of the seismic shell, and the laying and construction technology of the seismometer.
[0080] Design and fabrication of the seismometer housing:
[0081] Through investigation, we can know that in my country's waters, the average elastic modulus of seabed sediments is 0.137×10 9 Pa, while the elastic modulus of silt is 3×10 6 Pa, the particle radius of the sand is about 0.5mm, and the viscosity of the mud on the seabed is 40Pa·S. The frequency of Stoneley waves is between 0 and 300 Hz. The total weight of the seismometer is about 50kg, which is determined by some internal instruments required by the seismometer and the external shell structure. Through the theoretical calculation of seismometer coupling, the designed seismometer consists of an upper cover, a cabin and a lower cover. The specific parameters of ...
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The invention belongs to the field of seismic positioning and particularly relates to a submarine deposition layer region seismometer signal amplitude measuring method. Due to the fact that the coupling strength of a seismometer signal is in direct proportion to the square of the amplitude of the seismometer, a function of the amplitude of the seismometer, own structure parameters of the seismometer and geological parameters arranged by the seismometer is established, so that a theoretical basis is provided for the design of coupling of the seabed silt medium seismic waves and the seismometersignal. The method can be used for designing a construction process for manufacturing a seismometer shell structure and making seismometer arrangement, and important significance is achieved for improving remote detection of the seismometer.
Description
technical field [0001] The invention belongs to the field of earthquake positioning, and in particular relates to a method for measuring the signal amplitude of a seismometer in a seabed sediment layer area. Background technique [0002] China's sea area is vast, and the complex marine environment poses great challenges to the positioning and identification of ship targets. In addition to using traditional hydroacoustic positioning, using submarine earthquakes excited by ships is an effective and reliable way. However, due to the existence of a silt layer on the seabed, this brings great difficulties to the coupling of the signals of the seismometer and the seismic wave. The traditional method is to place the seismometer on the coupling frame, and the seismic wave will act on the seismometer through the coupling frame, and energy loss is generated in this process. In addition, the coupling frame is directly placed on the silt layer, without considering the propagation path...
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IPC IPC(8): G01V1/38
CPCG01V1/3808G01V1/3817G01V1/3835G01V1/3852
Inventor 姜富强高菲侯金弟张晓峻王锋杨军陈文焕
Owner HEFEI XINWEI INSTR