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Cable pipeline collapse signal monitoring method based on phi-OTDR (Optical Time Domain Reflectometer)

One - OTDR, cable technology, applied in the monitoring field of cable pipeline collapse signal, can solve problems such as road subgrade collapse, impact on traffic, pipeline safety, cable broken strands, etc., achieve strong anti-interference ability, low maintenance cost, The effect of improving reliability

Pending Publication Date: 2022-04-12
GUIZHOU POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the development of the economy, the traffic flow on the road has been increasing, and the overloading of trucks has become more and more frequent. Due to the long-term rain erosion, the road subgrade may collapse due to insufficient bearing capacity, and at the same time cause the cable pipes on both sides of the road to collapse. In addition, when there are karst caves or burrows of animals such as mice under the pipeline, it may also cause the collapse of the cable pipeline. The collapse of the cable pipeline may cause major traffic accidents and cable breakage, which greatly affects the safety of traffic and pipelines.

Method used

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  • Cable pipeline collapse signal monitoring method based on phi-OTDR (Optical Time Domain Reflectometer)
  • Cable pipeline collapse signal monitoring method based on phi-OTDR (Optical Time Domain Reflectometer)
  • Cable pipeline collapse signal monitoring method based on phi-OTDR (Optical Time Domain Reflectometer)

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Embodiment 1

[0031] refer to Figure 1~6 , is an embodiment of the present invention, provides a kind of monitoring method of the cable duct collapse signal based on Φ-OTDR, comprising:

[0032] S1: Real-time monitoring and collection of distributed vibration data along the cable.

[0033] It should be noted that the Φ-OTDR is connected to a redundant optical fiber of the cable to be monitored to realize distributed monitoring of vibration signals along the cable; the monitoring data results are stored in 5 seconds, and each result file contains 5-second full line vibration data.

[0034] S2: Preprocessing the distributed vibration data.

[0035] It should be noted that the data of a single monitoring result is three-dimensional space-time data, the time axis i represents the duration range of 5 seconds, and the space axis j represents the length of the entire cable line, denote H(i, j) as the corresponding array on the space-time coordinates, and its elements H(i,j) refers to the vibrati...

Embodiment 2

[0047] refer to Figure 7-8 It is another embodiment of the present invention, which is different from the first embodiment in that it provides a verification test of a method for monitoring cable duct collapse signals based on Φ-OTDR, which is the technical effect adopted in this method To verify and explain, this embodiment adopts the traditional technical solution and the method of the present invention to conduct a comparative test, and compares the test results by means of scientific demonstration, so as to verify the real effect of the method.

[0048] In this embodiment, the cable duct system is built under the SUMULIK environment in MATLB software programming, based on different forms of landslides and adding noise interference signals in the process of its landslides, the method of the present invention is used to test its signals, and the test results are as follows: Figure 7-8 as shown, Figure 7 Shown is the Φ-OTDR strong noise simulation signal diagram, Figure...

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Abstract

The invention discloses a method for monitoring a cable pipeline collapse signal based on a phi-OTDR. The method comprises the following steps: monitoring and collecting distributed vibration data along a cable in real time; carrying out preprocessing on the distributed vibration data; and on the basis of the preprocessed distributed vibration data, cable pipeline collapse event signals are monitored and recognized through image processing and contour recognition, and real-time whole-line pipeline collapse event online monitoring and positioning are achieved. According to the invention, all vibration information of the whole cable pipeline can be monitored and analyzed in real time, each pipeline collapse signal can be accurately analyzed, the collapse occurrence section can be positioned, real-time early warning service is provided for safe operation of the optical cable, the reliability and safety of operation of the optical cable are improved, and the working efficiency is improved. In addition, redundant communication optical cables on the two sides of the road are directly used for monitoring the collapse condition, no extra sensor is needed, the cost is low, the anti-interference capacity is high, and the maintenance cost of the system is low.

Description

technical field [0001] The invention relates to the technical field of optical cable monitoring, in particular to a method for monitoring cable duct collapse signals based on Φ-OTDR. Background technique [0002] In recent years, with the development of the economy, the traffic flow on the road has been increasing, and the overloading of trucks has become more and more frequent. Due to the long-term rain erosion, the road subgrade may collapse due to insufficient bearing capacity, and at the same time cause the cable pipes on both sides of the road to collapse. In addition, when there are karst caves or burrows of animals such as mice under the pipeline, it may also cause the collapse of the cable pipeline. The collapse of the cable pipeline may cause major traffic accidents and cable strand breaks, greatly affecting the safety of traffic and pipelines. However, landslides generally do not happen suddenly. The landslides that can be seen on the surface are usually the result...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00
Inventor 王尉军付磊杨远陈旻徐修远钟文强刘兵
Owner GUIZHOU POWER GRID CO LTD