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Desert buried pipeline monitoring system and method based on optical fiber vibration and temperature test

A buried pipeline and optical fiber vibration technology, which is applied in the pipeline system, gas/liquid distribution and storage, mechanical equipment, etc., can solve the problems of signal feature processing and low accuracy of monitoring signals, so as to improve accuracy and positioning accuracy Effect

Pending Publication Date: 2021-12-21
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this solution uses optical fiber sensors and acoustic wave sensing units to simultaneously monitor the pipeline in real time, it does not perform feature processing on the signals extracted by the sensors, and the accuracy of the monitoring signals is not high

Method used

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  • Desert buried pipeline monitoring system and method based on optical fiber vibration and temperature test
  • Desert buried pipeline monitoring system and method based on optical fiber vibration and temperature test
  • Desert buried pipeline monitoring system and method based on optical fiber vibration and temperature test

Examples

Experimental program
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Effect test

Embodiment 1

[0054] In this example, if figure 1 As shown, a desert buried pipeline information monitoring system based on distributed optical fiber vibration and temperature testing, the system includes data acquisition module, signal amplification module, signal acquisition module, signal analysis module, host computer, reference optical fiber and pattern recognition module. The signal acquisition module is connected with the reference optical fiber and the signal amplification module respectively; the signal amplification module is connected with the data acquisition module; the host computer is respectively connected with the data acquisition module and the reference optical fiber; the signal analysis module is connected with the host computer; the pattern recognition module is connected with the signal analysis module .

[0055] In this embodiment, the signal acquisition module includes a wavelength division multiplexer, an isolator, a light source module and two photoelectric detect...

Embodiment 2

[0078] In this embodiment, a desert buried pipeline information monitoring method based on distributed optical fiber vibration and temperature is carried out based on the monitoring system provided in Embodiment 1, which specifically includes the following steps:

[0079] S1, when the system enters the working state, the host computer respectively obtains the vibration signal detected by the distributed optical fiber vibration sensor and the temperature signal detected by the distributed optical fiber temperature sensor;

[0080]S2, the upper computer uses the difference algorithm to perform differential processing on the original scattering curve in the vibration signal to obtain the initial light intensity change range result, and uses the filtering algorithm to smooth the difference curve to remove redundant noise in the vibration signal and obtain the vibration source location value;

[0081] S3. According to the spontaneous Raman scattering effect technology and optical t...

Embodiment 3

[0161]This embodiment is implemented based on Embodiment 1 and Embodiment 2. In this embodiment, distributed optical fiber vibration and temperature sensors can be used to locate the displacement and deformation in the pipeline desert.

[0162] Due to the movement of sand dunes, the pipeline will be displaced and deformed, mainly causing the transverse and longitudinal buckling deformation of the pipeline. At this time, fluid-solid coupling vibration will occur inside the pipeline. Further, the vibration will cause the refractive index of the optical fiber to change, and cause the return light intensity change. Since the change range of the light intensity in the vibrating area is stronger than that in the non-vibrating area, the light intensity change range is used as the basis for vibration location. The monitoring system and monitoring method use the difference algorithm to perform differential processing on the collected original scattering curve to obtain the initial ligh...

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Abstract

The invention discloses a desert buried pipeline monitoring system and method based on optical fiber vibration and temperature test. The method comprises the following steps: setting the desert buried pipeline monitoring system, and collecting a vibration signal and a temperature signal of a buried pipeline through the desert buried pipeline monitoring system; performing differential processing on an original scattering curve in the vibration signal to obtain an initial light intensity change amplitude result, and performing smoothing processing on a difference curve by using a filtering algorithm to obtain a vibration source position value; performing temperature demodulation by using the light intensity of Stokes light and anti-Stokes light in the temperature signal to obtain a temperature value; and acquiring a vibration waveform of the vibration signal and a temperature waveform of the temperature signal, extracting signal characteristics of frequency domains of the vibration waveform and the temperature waveform, calculating the displacement deformation of the pipeline, and judging the fault event type according to a preset judgment condition. The system can effectively monitor the abnormal condition of the buried pipeline in a desert area caused by the movement of dunes, can monitor the condition along the pipeline in real time, and is high in fault positioning and monitoring accuracy.

Description

technical field [0001] The invention relates to the technical field of pipeline monitoring, in particular to a desert buried pipeline monitoring system and method based on distributed optical fiber vibration and temperature testing. Background technique [0002] With the transformation of my country's energy structure and the increase of energy demand, oil and natural gas will increase year by year in my country's energy demand. Oil and natural gas need to go through layers of links from exploitation to consumption, and subject to the influence of my country's energy distribution, production areas and consumption-intensive areas may span thousands of kilometers. Pipeline transportation is generally used for oil and gas transportation. At present, pipeline transportation has become the main transportation method for dangerous substances such as oil and natural gas and liquid materials, especially after the adjustment of the national energy strategy and the successful operatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D5/02F17D5/00
CPCF17D5/02F17D5/00
Inventor 葛亮蒋炎胡泽肖小汀汪敏牟强陈昊靳涛
Owner SOUTHWEST PETROLEUM UNIV
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