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Land-use four-component digital geophone

A technology of geophones and geophones, applied in the direction of seismic signal receivers, etc., can solve problems such as incompetence in seismic wave propagation characteristics, and achieve the effect of improving the accuracy of exploration

Inactive Publication Date: 2014-01-15
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

However, the commonly used MEMS geophones and moving coil geophones are not up to the task of more finely studying the propagation characteristics of seismic waves.

Method used

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  • Land-use four-component digital geophone
  • Land-use four-component digital geophone

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Embodiment Construction

[0021] As shown in the figure, the land-use four-component digital geophone 1V3A of the present invention has the function of collecting and receiving signals of one velocity component and three acceleration components at the same receiving point, which can make subsequent data processing and analysis at one speed Parameters and 3-component acceleration parameters, which are four different physical quantities that describe the displacement of the same receiving point, are compared and analyzed. At the same time, due to the different response characteristics of the velocity sensor (moving coil geophone CG) and the acceleration sensor (MEMS Sensor) to the seismic signal and noise at the same receiving point, in other words, the effective seismic signal and various noises in the The two physical quantities of velocity and acceleration have different performance characteristics. Using this characteristic is more conducive to improving resolution and signal-to-noise ratio and detect...

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Abstract

The invention relates to a land-use four-component digital geophone. In the prior art, a seismic wave propagation characteristic can not be finely researched. By using the geophone of the invention, the above problem is solved. The geophone is a four-component geophone formed by a three-component MEMS acceleration geophone and a moving-coil velocity geophone. The geophone is formed by a micro electromechanical system earthquake three component acceleration sensor, a weak signal detection and feedback circuit, a moving-coil geophone, a digital unit, a control module CM, a data communications unit and a power module PM. The micro electromechanical system earthquake three component acceleration sensor and the weak signal detection and feedback circuit are used to complete acquisition and digital functions of an acceleration parameter. The moving-coil geophone and the digital unit are used to complete the acquisition and digital functions of a velocity parameter. The geophone possesses the advantages that a signal acquisition and receiving function of the one velocity parameter and the three-component acceleration parameter can be performed on a same receiving point; the seismic wave propagation characteristic can be finely researched; exploration precision is greatly increased.

Description

technical field [0001] The invention relates to a geophone, in particular to a four-component digital geophone for land use. technical background [0002] Seismic exploration method is still the main means of oil and gas exploration on land and sea, and also an important exploration method for other mineral resources, and is widely used in the study of the earth's internal structure, engineering exploration and detection, geological disaster prediction and so on. The instrument used in seismic exploration to directly pick up seismic vibration and convert the vibration into an energy form that meets the needs of the instrument recording system is called a geophone. Seismic geophones can be divided into land geophones, swamp geophones, sea geophones and underground geophones according to the use environment; according to the working principle, they can be divided into electromagnetic induction (moving coil) geophones, piezoelectric geophones, optical fiber Geophones and MEMS ...

Claims

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Application Information

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IPC IPC(8): G01V1/18
Inventor 郭建
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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