Piezoelectric digital seismometer on land

A technology of digital geophones and geophones, applied in the direction of seismic signal receivers, etc., can solve problems such as poor anti-interference ability, low sensitivity, and heavy weight

Inactive Publication Date: 2010-07-28
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI +1
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AI Technical Summary

Problems solved by technology

YD20OO land-use piezoelectric seismic accelerometer has been tested in a large number of fields, and achieved very good results, but there are the following points to be improved: (1) large volume; (2) heavy weight; (3) sensitivity Low...

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  • Piezoelectric digital seismometer on land
  • Piezoelectric digital seismometer on land
  • Piezoelectric digital seismometer on land

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Embodiment Construction

[0024] Such as figure 1 As shown, the land-use piezoelectric seismic digital geophone of the present invention is composed of an improved land-use piezoelectric geophone 1, a high-precision analog-to-digital converter type digital unit 2 and a communication unit 3. The characteristics of the land-use piezoelectric geophone have changed greatly, the volume and weight have been greatly reduced, the sensitivity has been significantly improved, and the transmission of analog signals on the cable has been avoided, and the anti-interference ability has been improved. The dynamic range of the land-use piezoelectric geophone is increased to about 100dB, making it one of the best geophones for single geophone receiving technology. The application scope of the land-use piezoelectric geophone is greatly improved. Digitizing unit 2 is composed of multi-way switch D1, CS3302A preamplifier D2, CS5373A delta-sigma modulator D3, CS5378 digital filter D4 and CS5378 test signal generator D5. ...

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Abstract

The invention relates to a piezoelectric digital seismometer on land to solve the problem of poor interference resistance of the conventional seismometer. The seismometer consists of a piezoelectric seismometer, a digitalizing unit and a data communication unit which are connected sequentially, wherein the piezoelectric seismometer and the digitalizing unit are directly connected and integrated into a whole; a piezoelectric material of the piezoelectric seismometer consists of a multi-layer piezoelectric device; and the data communication unit provides the function of data communication with a seismic instrument host system. In the piezoelectric digital seismometer, a core body comprises a cylindrical shell, a substrate, the multilayer piezoelectric device, a mass block and extraction electrodes, wherein the substrate is arranged on the bottom of the shell and is in rigid connection with the shell; the substrate is provided with the piezoelectric material; the piezoelectric material is provided with the mass block perceiving seismic wave movement; and the extraction electrodes are arranged on the upper side and the lower side of the piezoelectric material respectively. The piezoelectric digital seismometer has the advantages of small volume, light weight, high sensitivity, small resistance and strong interference resistance.

Description

technical field [0001] The invention relates to a geophone, in particular to a land-use piezoelectric seismic digital geophone. 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 geophones, piezoelectric geophones, optical fiber geophones and MEMS geophones A...

Claims

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Application Information

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IPC IPC(8): G01V1/18
Inventor 郭建刘光鼎刘兆琦罗维炳
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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