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Sea electromagnetical type shallow layer earthquake controllable earthquake focus system

An electromagnetic, shallow-layer technology, applied in the field of vibroseis devices for marine geophysical exploration, can solve problems such as the inability to implement land seismic exploration methods, and achieve the effects of optimizing energy output, good signal repeatability, and solving influences

Inactive Publication Date: 2008-10-15
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the "phased array vibroseis system" disclosed in ZL 200410010711.3 uses beam orientation to transfer energy concentratedly to the ground. However, in the process of marine seismic exploration, due to constraints such as seismic exploration carriers, land seismic exploration cannot be realized. method, the phased array vibroseis system cannot be used for exploration

Method used

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  • Sea electromagnetical type shallow layer earthquake controllable earthquake focus system
  • Sea electromagnetical type shallow layer earthquake controllable earthquake focus system
  • Sea electromagnetical type shallow layer earthquake controllable earthquake focus system

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing and embodiment describe in further detail:

[0020] The marine electromagnetic shallow seismic vibrator system is composed of a main control machine and a shock exciter array:

[0021] ——The main control machine is connected with the synchronous trigger unit 5 of the seismograph by CPU 9 [P 3.3], [P3.4] is connected with the state display 8 of the main control machine, [P2.7 / 2.8] is connected with the parameter module 14, [ P0] is connected with level conversion module 6, signal generation module 2, signal filter 3, power amplification module 4 and exciter array 11, CPU (9) is connected with liquid crystal display module 10 by data port, is connected with liquid crystal display 12, CPU 9 [P1] is connected with keyboard input module 13;

[0022] ——The exciter array 11 is fixed on the steel frame 30 by the fixed base plate 31 through the fixed bracket 32, the fixed bracket 32, the magnetic steel 35, the magnetic pole plate 3...

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Abstract

The invention relates to a vibroseis device for marine geophysical exploration, in particular to a marine electromagnetic type shallow seismic vibrator system. The system is formed by a main controller and a vibration generator array. The main controller consists of a CPU, a seismograph synchronizer trigging unit, a parameter module, an electric level switching module, a signal generating module and a power amplifying module. The vibration generator array is fixed onto a steel shelf by a fixing substrate. A fixing bracket, magnetic steel, a magnetic polar plate and an iron core are rigidly connected with a housing. Moving coils are fixed on a middle axle of the vibration generator. The middle axle of a vibration generator is connected with a moving substrate. The moving coils are connected with a load bearing spring by aluminum alloy. The load bearing spring is fixed onto the housing through rivets. A supporting spring which is connected with the moving substrate by bolts is fixed onto the steel shelf through the bolts. The system is comparatively high in scanning frequency section of signal up to 1 to 1500Hz, good in repeatability of the signal, and optimal in the energy output of the vibration generator. The system meets the requirements of high resolution earthquake exploration at marine shallow layers and solves the influence of marine earthquake exploration carriers on seismic focus.

Description

Technical field: [0001] The invention relates to a vibrator device for marine geophysical exploration, in particular to a marine electromagnetic shallow seismic vibrator system. Background technique: [0002] Marine seismic sources are used in the field of marine seismic exploration. The existing marine geophysical exploration sources include explosive sources, air gun sources, and electric spark sources. Explosive sources are rarely used because of their great danger; air gun sources are in use. It is destructive to marine organisms and the marine environment, and the airgun source has a contradiction between the detection depth and the seismic wavelet frequency bandwidth (resolution). The most important problem is that the airgun source signal is consistent and uncontrollable. The energy of the electric spark source is weak, and the detection depth is limited, which will have a great impact on the exploration results in the high-resolution seismic exploration of the shallo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/02
Inventor 陈祖斌林君张林行孙锋
Owner JILIN UNIV
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