Exact locating method for fault points of submarine cable

A submarine cable, accurate positioning technology, applied in the fault location, using the pulse reflection method to detect the fault and other directions, can solve the problem of not being able to determine the geographical location of the fault point, and achieve the effect of accurate positioning and high measurement accuracy

Active Publication Date: 2012-10-17
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using optical time domain reflectometer (OTDR) to locate submarine cables is the main method currently used, but OTDR can only measure the distance between the fault point of the optical fiber and the test point, and cannot determine the geographical location of the fault point, especially the excess

Method used

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  • Exact locating method for fault points of submarine cable
  • Exact locating method for fault points of submarine cable
  • Exact locating method for fault points of submarine cable

Examples

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Example Embodiment

[0028] Example 1

[0029] a kind of like Figure 1-7 The accurate location method of the submarine cable fault point shown in the figure uses the Brillouin distributed strain / temperature measurement technology, and extracts the characteristic information of the submarine cable route by fusing the Brillouin distributed optical fiber strain / temperature measurement data with the actual submarine cable status information , so as to realize the detection and accurate location of submarine cable fault points. In order to make the purpose, technical solution and advantages of the present invention clearer, the method for accurately locating the fault of the submarine cable will be described below according to a specific implementation case with reference to the relevant drawings.

[0030] figure 1 It is a connection diagram of using a Brillouin Optical Time Domain Reflectometer (BOTDR) or a Brillouin Optical Time Domain Analyzer (BOTDA) to monitor an optoelectronic composite submar...

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Abstract

The invention discloses an exact locating method for fault points of a submarine cable. The exact locating method for the fault points of the submarine cable comprises the following steps of: realizing real time online monitoring of the submarine cable by utilizing BOTDR (brillouin optical time domain reflectometer) or BOTDA (brilouin optical time domain analysis); carrying out combined analysis by utilizing strain/temperature information, a submarine topography and geologic structure and construction details carried by a brillouin scattering signal; and extracting feature points, and establishing a database so as to largely improve the location precision. After the database is established, complex data query and calculation operations can be saved as long as a submarine cable has failure, thus the fault position can be quickly and exactly located, the submarine cable can be repaired and the labors and materials are largely saved.

Description

technical field [0001] The invention relates to a method for locating cable fault points, in particular to a method for accurately locating submarine cable fault points. [0002] Background technique [0003] my country has a coastline of 32,000 kilometers, more than 6,500 large and small islands, and a territorial sea area of ​​about 4.73 million square kilometers. There are many offshore working platforms. Submarine cables are used in remote power supply, high-voltage power transmission, power communication, signal transmission, and guarantee the production and life of island residents. It plays a key role in the normal operation of offshore working platforms. [0004] Submarine cables are wires wrapped in insulating material and laid on the seabed for power and information transmission. According to the use, it can be divided into power cables, photoelectric composite cables, communication optical cables, etc. In recent years, photoelectric composite subm...

Claims

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Application Information

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IPC IPC(8): G01R31/11
Inventor 吴飞龙林韩林鸿伟聂津李永倩赵丽娟吕安强杨志杨力帆熊华
Owner STATE GRID CORP OF CHINA
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