RS485 efficient long-distance data transmission system and method used for geophysical exploration

Abstract

The invention provides an RS485 efficient long-distance data transmission system used for geophysical exploration. The system comprises a downlink input RS485 interface, a downlink output RS485 interface, an uplink input RS485 interface, an uplink output RS485 interface, and FPGA and an A / D conversion chip which are arranged in all collection stations. A downlink command transmission passageway is composed of the downlink input RS485 interface, the downlink output RS485 interface and the FPGA. An uplink data transmission passageway is composed of the uplink input RS485 interface, the uplink output RS485 interface and the FPGA. The invention further provides an RS485 efficient long-distance data transmission method used for geophysical exploration. Meanwhile, by means of the controllability of the RS485 transmission rate, an effective low-power-consumption mode is provided for a seismic exploration instrument system, the field standby time of exploration instruments can be greatly prolonged, and the important significance is achieved for the improvement of the field work efficiency.

Description

technical field [0001] The invention relates to the technical field of data transmission in geophysical prospecting instruments, in particular to an RS485 high-efficiency long-distance data transmission system and method for geophysical prospecting. Background technique [0002] For large-scale seismic exploration systems, efficient and stable long-distance data transmission is a key issue, which determines the stability of the system and the integrity of the collected data. In the seismic exploration system, there are data transmissions at different rates and distances between acquisition stations, cross stations, and between cross stations and the main control station (instrument vehicle). Among them, due to the large number of collection stations and long distances (such as single-station multi-channel transmission over a distance of 100 meters), an efficient, stable, and low-power data transmission solution is urgently needed. [0003] At present, the more mature long...

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Problems solved by technology

Due to the limitation of transmission chip performance, it cannot be used in longer distance transmission

The RS485 transmission method is also adopted between the CNPC ES109 system acquisition units. Based on the limitation of the transmission rate, it adopts a dual-channel parallel mode for transmission, resulting in complex system structure and protocol, high power consumption, and low power consumption that cannot meet the requirements of field operations. and long-term continuous work requirements

[0006] From the above analysis of commonly used system transmission schemes, it can be seen that RS485, as a long-distance transmission scheme commonly used in the industry, is also widely used in seismic exploration systems, but the transmission rate is usually low, and the 428XL system supports a maximum transmission rate of 16 Mbps , when shielded twisted pair is used, the maximum transmission distance is 90 meters

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