Cascade-collecting-station high-efficiency production line data transmission system used for seismic exploration and data transmission method

Abstract

The invention provides a cascade-collecting-station high-efficiency production line data transmission system used for seismic exploration, wherein two LVDS (low voltage differential signaling) interfaces are used in a master control station and are respectively connected to cross stations; four LVDS interfaces are used in each cross station, wherein an uplink interface is led to the master control station, a downlink interface is connected to the cross station of the next stage, a left side interface and a right side interface are respectively connected with collecting stations; two LVDS interfaces are used in each collecting station; and a high-speed data transmission technique based on a LVDS is used among the collecting stations, between each collecting station and each cross station and between each cross station and the master control station. The invention further provides a high-speed data transmission method based on the LVDS. The system and the method have the following advantage that hardware is directly driven by an FPGA (field programmable gate array) control logic based on the LVDS transmission technique, so that the requirement for high data ratio in a seismic exploration system can be satisfied; and the characteristics of simpler structure and low transmission error rate are achieved.

Description

technical field [0001] The invention relates to a seismic data transmission technology in geophysical exploration instruments, in particular to a data transmission system and a data transmission method for seismic exploration. Background technique [0002] At present, the data transmission system in seismic exploration instruments that are more common at home and abroad belongs to the 428XL land seismic data transmission system of the French company Sercel, the data transmission system of the CNPC ES109 million channel land seismograph system, and the First Institute of Oceanography of the State Oceanic Administration. He applied for a patent (CN201010226156.3) for "Deepwater Shallow Layer High Resolution Multi-Channel Seismic Exploration Data Transmission System". [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 powerful functions...

AI Technical Summary

Problems solved by technology

At present, the data transmission system in the seismic exploration system adopts more technologies based on Ethernet transmission technology, such as the 428 series instruments of the French Sercel company, and its crossover line adopts the Ethernet transmission technology based on the TCP / IP protocol. The technology of the transmission scheme is mature, but it is relatively complicated and requires the support of the underlying software; another commonly used data transmission method is based on RS485 technology, which is also a relatively mature transmission technology in the industry. However, due to the low data rate of RS485 in the case of long distances, Therefore, in order to meet the high data rate requirements in the seismic exploration system, multi-channel RS485 parallel transmission is usually required, resulting in a large power consumption of the entire transmission system; the technology of directly driving the network physical layer chip for transmission is essentially a technology based on network transmission , because the TCP / IP protocol layer is skipped, its structure is relatively simple, but because it is essentially based on network technology, the system synchronization accuracy is poor, and it is impossible to achieve high-precision synchronous acquisition of the entire system

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