Geophysical surveying data acquisition and transmission system

Abstract

The invention discloses a geophysical surveying data acquisition and transmission system, which comprises a main control station, N cross stations and N*M acquisition stations. The main control station is sequentially connected with the N cross stations. The N cross stations are connected with one another via cross lines. M acquisition stations are connected at the two sides of each cross station via jug lines. According to the technical scheme of the invention, the acquisition stations are symmetrically arranged and are not directivity-sensitive. In this way, the field construction is greatly facilitated and the field operation efficiency is improved. The cross stations are symmetrically arranged all around the system, so that the cross stations can be connected with one another, the main control station or the acquisition stations through being freely rotated at 90 degrees without the need of differentiating connection directions. As a result, the field construction is facilitated and the on-site field operation efficiency is improved. The main control station can be connected with the cross stations and can also be directly connected with the acquisition stations. Based on the LVDS high-speed differential power transmission mode, the main control station is in communication with the cross stations/acquisition stations. Therefore, the defect that the optical fiber communications is not easy in maintenance can be overcome.

Description

technical field [0001] The invention relates to a seismic data collection and transmission system, in particular to a data transmission system for geophysical surveying and collection. 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 ...

AI Technical Summary

Problems solved by technology

And the back-end processing unit of the collection station adopts the digital signal processor TMS320C32, the system structure is relatively complex, and the flexibility is relatively poor

[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

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