Data transfer node for geophysical exploration

A data transmission node and geophysical technology, applied in the field of geophysical exploration, can solve the problems of system reliability reduction, affecting data transmission distance, and not reducing the data transmission bandwidth of transmission lines, etc., to achieve the effect of reducing overhead and having versatility

Active Publication Date: 2016-08-10
TIANJIN UNIV
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Problems solved by technology

Since the transmission distance is inversely proportional to the data bandwidth on the transmission line, these systems have the disadvantage that the transmission distance is not far when data transmission is performed between data transmission nodes (hereinafter referred to as nodes); Under the conditions of cable sections, they need more nodes for data relay transmission, and more nodes will not only bring greater costs, but also reduce the reliability of the entire system
Furthermore, the nodes of the 408UL system of the French SERCEL company use HDB3 encoding for data transmission. This encoding method can make the serial data stream have more timing information, so that the data receiving end can extract the bit synchronization clock. , however, the HDB3 encoding method does not reduce the bandwidth of the data stream on the transmission line, so this encoding method limits the transmission distance between nodes to a certain extent
At the same time, the nodes of the SeaMUX Digital Array system of HTI Company in the United States use Manchester encoding for data transmission. This encoding method is to increase the transmission bandwidth of the data on the transmission line to facilitate the data receiving end to extract the bit-synchronous clock. Its The encoding efficiency is only 50%. Therefore, this encoding method not only does not reduce the data transmission bandwidth on the transmission line, but also increases the data transmission bandwidth, which seriously affects the data transmission distance between nodes.

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  • Data transfer node for geophysical exploration

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Embodiment Construction

[0025] In order to overcome the deficiencies in the prior art, (1) provide a long-distance transmission node in order to overcome the disadvantages in the prior art that the data bandwidth on the transmission lines between data transmission nodes (hereinafter referred to as nodes) remains unchanged or is raised, It uses a coding method that can reduce the data bandwidth on the transmission line to encode the original data, so as to realize the transmission of longer distance data between nodes, and can further reduce the hardware cost of the seismic exploration array system and improve the working reliability of the system;

[0026] (2) Using link multiplexing technology, based on the method of synchronous transmission, a seismic signal data transmission node that simultaneously transmits downlink commands and synchronous sampling clocks through a twisted pair or coaxial line is provided to reduce seismic exploration The overhead of transmission lines inside the array system; ...

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Abstract

The invention belongs to the field of geophysical exploration, and provides (1) a long-distance transmission node; (2) reduces the overhead of the internal transmission line of the seismic exploration array system; (3) provides a data transmission node for geophysical exploration ; (4) Provide a general long-distance data transmission node for geophysical exploration with an adjustable or adaptive serial data transmission rate between nodes between 50Kbps-300Mbps. For this reason, the technical scheme that the present invention adopts is that the data transmission node of geophysical exploration is made up of uplink path, downlink path, acquisition module transmission interface; It consists of a level matching network, a clock / data restorer, a first command transponder, a second level matching network, an NRZI / MLT-3 encoder, and a second transformer. The invention is mainly applied to geophysical exploration.

Description

technical field [0001] The invention belongs to the field of geophysical exploration, and in particular relates to a data transmission node for geophysical exploration. technical background [0002] The seismic exploration array system is widely used in engineering exploration, oil exploration, seabed geological structure exploration, marine fish density observation, etc. Currently, the mainstream seismic exploration systems on the market mainly include the 408UL system of the French SERCEL company and the SeaMUX of the American HTI company. Digital Array system, etc. Since the transmission distance is inversely proportional to the data bandwidth on the transmission line, these systems have the disadvantage that the transmission distance is not far when data transmission is performed between data transmission nodes (hereinafter referred to as nodes); Under the condition of cable section, they need more nodes for data relay transmission, and more nodes will not only bring gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/22G08C19/00
Inventor 段发阶蒋佳佳华香凝李彦超陈劲李宸阳李骥段晓杰
Owner TIANJIN UNIV
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