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Cabled remote short section

A short section and transmission circuit technology, which is applied in the field of data transmission, can solve the problems of long cables and large losses, and achieve the effect of improving anti-interference

Active Publication Date: 2021-02-02
ZHANJIANG BRANCH OF CHINA NATIONAL OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the selective frequency attenuation characteristics of the cable channel, and because the cable is long and the loss is large, the realization of stable and reliable data transmission under the condition of low current consumption and strong channel interference has become the key to communication in the deep sea logging field. question

Method used

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  • Cabled remote short section
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Embodiment Construction

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, various implementation modes of the present invention will be described in detail below in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that, in each implementation manner of the present invention, many technical details are provided for readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in this application can also be realized.

[0031] The first embodiment of the present invention relates to a cable remote transmission short joint, such as figure 1 As shown, it includes: transmission circuit 1, OFDM code modulation and demodulation module 2 and Mann code modulation and demodulation module 3;

[0032] Transmission circuit 1, for dec...

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Abstract

The embodiment of the present invention relates to the technical field of intelligent equipment, and discloses a cabled remote transmission nipple. The first OFDM code signal can be received from the ground host, and the first OFDM code signal can be converted into the first differential Manchester code signal and then sent to the underwater detector; and / or, the second differential Manchester code signal can be received from the underwater detector , and convert the second differential Manchester code signal into a second OFDM code signal and send it to the ground host, so that in the wired communication part between the ground host and the underwater detector, the data is realized by combining OFDM communication and differential Manchester code communication. transmission to improve the anti-interference during data transmission.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of data transmission, and in particular to a cabled remote transmission sub. Background technique [0002] In the field of oil exploration, due to the complex channel environment, signal transmission is susceptible to interference. The problem of signal transmission in deep sea oil exploration has always been a difficult problem. At present, an effective solution is to use cable communication. The above-water operation platform and the seabed stage, the seabed and the upper end of the divider all use wired communication; the upper end of the divider and the subsea detector at the lower end of the divider Wireless communication is carried out in the form of electromagnetic waves. In the wired transmission part, the above-water operation platform and the seabed stage (referred to as "upper end") adopt Orthogonal Frequency Division Multiplexing (OFDM) code communication, and the seab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/12
CPCE21B47/12
Inventor 刘振江王尔钧郭永宾钟其水李中李辉谢玉洪孟文波赵启彬颜帮川董钊任冠龙张崇余意李普
Owner ZHANJIANG BRANCH OF CHINA NATIONAL OFFSHORE OIL CORP