Fault monitoring system for ultralong optical cable and method

A fault monitoring and detection system technology, applied in optical instrument testing, machine/structural component testing, measuring devices, etc., can solve the problem of difficulty in obtaining the temperature and strain information of the optical cable at the fault point, and achieve improved judgment accuracy and high precision. Fault location and diagnosis, the effect of simple structure

Pending Publication Date: 2018-01-16
中光华研电子科技有限公司
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Problems solved by technology

At present, optical time domain reflectometer (OTDR) is mainly used to locate the optical cable, but OTDR can only measure the distance between the fault

Method used

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  • Fault monitoring system for ultralong optical cable and method
  • Fault monitoring system for ultralong optical cable and method
  • Fault monitoring system for ultralong optical cable and method

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[0037] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0038] On the one hand, such as figure 1 As shown, the embodiment of the present invention provides a fault monitoring system for an ultra-long optical cable, including: a first Brillouin optical time domain detection system 10, a second Brillouin optical time domain detection system 20, an uplink optical fiber 30, Downstream path fiber 40 and multiple optical repeaters 50 arranged in each section of the upstream path fiber and downstream path fiber. Both ends of the upstream path fiber and the downstream path fiber are connected to the first Brillouin optical time domain detection system and The second Brillouin optical time domain detection system is connected. The first Brillouin optical time domain detection system and the second Bril...

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Abstract

The invention discloses a fault monitoring system for an ultralong optical cable and a method and belongs to the technical field of ultralong optical cable detection. The fault monitoring system for the ultralong optical cable disclosed by the invention comprises a first brillouin time domain detection system, a second brillouin time domain detection system, an uplink path optical fiber, a downlink path optical fiber and a plurality of optical repeaters arranged in all the sections of the uplink path optical fiber and the downlink path optical fiber, wherein the first brillouin time domain detection system and the second brillouin time domain detection system are used for emitting detection pulse light to the uplink path optical fiber and the downlink path optical fiber, collecting a backscattered brillouin light signal scattered by the detection pulse in the optical fiber channel and analyzing the monitoring data at each point on the optical fiber channel. According to the fault monitoring system for the ultralong optical cable and the method disclosed by the invention, the fault information at the abnormal point of the optical cable is analyzed by utilizing the original temperature and strain data acquired by the collected back scattered brillouin light signal, so that the high-precision fault positioning and diagnosis can be realized.

Description

technical field [0001] The invention relates to a fault monitoring system and method for an ultra-long optical cable, belonging to the technical field of ultra-long optical cable detection. Background technique [0002] With the rapid development of my country's economy and society, the demand for electricity continues to increase. The UHV DC power grid has the characteristics of long transmission distance, large capacity, low line loss, and saving line corridors. With the acceleration of construction of UHV DC line projects, safety issues have become increasingly prominent. How to detect faults in time is an important issue at present. At present, ultra-long submarine optical cables carry 90% of international communication traffic, and submarine optical cables are vulnerable to man-made and natural disasters. Therefore, the rapid and accurate location of the submarine cable line fault enables maintenance personnel to quickly repair the fault, which can reduce the cost of ...

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Application Information

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IPC IPC(8): G01M11/00G01D21/02
Inventor 李伟赖明聪李桂顺
Owner 中光华研电子科技有限公司
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