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Geophysical exploration data acquisition station

A geophysical prospecting and data acquisition technology, applied in the direction of seismic signal transmission, etc., can solve the problems that the system noise is greatly affected by the system integration degree, the system dynamic range is large, and the system noise is high, so as to achieve improved flexibility, compact and simple structure, high precision effect

Active Publication Date: 2014-09-24
HEFEI GUOWEI ELECTRONICS
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AI Technical Summary

Problems solved by technology

[0007] It can be seen that the current seismic exploration instrument data acquisition system generally adopts 24-bit precision, and the system noise is greatly affected by the system integration degree. The system based on ASIC circuit usually has lower system noise and large system dynamic range; The front-end analog-to-digital conversion system has poor integration and high system noise

Method used

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  • Geophysical exploration data acquisition station
  • Geophysical exploration data acquisition station

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Embodiment Construction

[0020] See figure 1 , a geophysical prospecting data acquisition station, comprising an interconnected front-end analog-to-digital conversion unit and a back-end processing unit; the analog-to-digital conversion unit includes an analog RC filter 1 and an ADS1282 conversion chip 2 connected in sequence; the processing unit is composed of The field programmable gate array 3 is composed of a data transmission interface chip connected to the field programmable gate array 3. The data transmission interface chip includes two symmetrically arranged command interfaces relative to the field programmable gate array 3 and two relatively field programmable The data interface of gate array 3 symmetrical settings; The serial / parallel converter 6 connected with the gate array 3 and the equalizer CLC012 7 connected with the serial / parallel converter 6 are composed.

[0021] See figure 2 , the short-circuit noise test circuit of the collection station, including a field programmable gate ar...

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Abstract

The invention discloses a geophysical exploration data acquisition station. The geophysical exploration data acquisition station comprises a front-end analog-to-digital conversion unit and a back-end processing unit which are connected with each other, wherein the analog-to-digital conversion unit consists of a variable gain amplifier and an analog-to-digital converter; and the processing unit consists of a field programmable gate array and a data transmission interface chip which is connected with the field programmable gate array. The geophysical exploration data acquisition station integrates data acquisition and data transmission, is simple in structure, convenient to use, and has the advantages of high integration level, high precision, low noise and low power consumption.

Description

technical field [0001] The invention relates to a seismic data acquisition and transmission system, in particular to a geophysical exploration data acquisition station. Background technique [0002] At present, the data acquisition system of the most advanced seismic exploration instruments at home and abroad is the 428 series land seismic data acquisition system of the French Sercel company, the CNOOC offshore seismic data acquisition system-"Hailiang" system, and the CNPC ES109 10,000-channel land seismograph system etc. In addition, there are some acquisition systems developed by other research institutions, such as the patent "Seismic Data Acquisition Device" (application number 01142110.X) applied by the Analysis and Prediction Center of China Earthquake Administration. [0003] The French company Sercel has accumulated many years of experience in the development of land seismic instruments. Its latest 428 series is improved on the basis of its 408 and has more powerfu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/22
Inventor 曹桂平宋克柱吕文贵陈静王映初
Owner HEFEI GUOWEI ELECTRONICS
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