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Light source system of natural gas pipe leakage optical fiber monitoring system

A natural gas pipeline and monitoring system technology, applied in the field of measurement, impact measurement and pipeline system, can solve the problems of difficult design, complex installation technical requirements of optical fiber sensing unit, etc., achieve stable visibility and signal-to-noise ratio, maintain The effect of detection and the effect of increasing the number of multiplexing

Inactive Publication Date: 2013-03-27
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the technical requirements for the installation of the optical fiber sensing unit are complex, and the design is difficult. The main thing is to ensure that the detection sensitivity of the optical fiber sensing unit is high enough and the noise isolation is good.

Method used

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  • Light source system of natural gas pipe leakage optical fiber monitoring system
  • Light source system of natural gas pipe leakage optical fiber monitoring system
  • Light source system of natural gas pipe leakage optical fiber monitoring system

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Embodiment

[0042] Embodiment. This example is mainly an embodiment designed for the optical fiber monitoring system for natural gas pipeline leakage, so it needs to be carried out on the basis of the embodiment of the monitoring system. The monitoring system consists of figure 1 As shown, the monitoring system consists of figure 1 As shown, an optical fiber sensing unit is installed every 1.5km on the pipeline body, and a total of 10 sensors are installed. The first 5 sensors and the last 5 sensors form a sensor group respectively, and all optical fiber sensor groups share one of the transmission cables. The optical fiber is connected to the system light source as a launching optical fiber, and each optical fiber sensor group uses one optical fiber in the transmission cable to connect to the system photodetector as a return optical fiber; the output connection of the photodetector includes a leakage signal identification device and an event The signal acquisition and processing module...

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Abstract

The invention discloses a light source system of a natural gas pipe leakage optical fiber monitoring system and relates to the technical field of mechanical vibration measurement, impact measurement and a pipe system. The system consists of a laser with adjustable optical frequency and a special modulated signal generating module, wherein an optical frequency adjusting input end of the laser is connected with a digital / analog output end in the modulated signal generating module; a signal generator in the modulated signal generating module generates serrasoidal / inverse serrasoidal wave; regulation and control can be performed through a frequency regulator, an amplitude regulator and a serrasoidal / inverse serrasoidal wave selector; and the laser is affected by a modulating signal generated by the modulated signal generating module, so that the optical frequency of output optical wave of the laser is synchronously changed along with the waveform of the modulating signal. The natural gas pipe leakage optical fiber monitoring system is high in sensitivity and accuracy, and low in false alarm rate and is not easily affected by environmental factors.

Description

technical field [0001] The invention relates to a light source system of a natural gas pipeline leakage optical fiber monitoring system, and relates to the technical fields of mechanical vibration measurement, impact measurement and pipeline systems. Background technique [0002] At present, the total length of pipelines built in the world has reached 2.5 million kilometers, which has surpassed the total mileage of railways and has become the main mode of energy transportation in the world. Oil transportation in developed countries and oil-producing regions in the Middle East has all realized pipelines. my country's pipelines have also developed rapidly in recent years, with a total length of more than 70,000 kilometers. A large energy pipeline network has initially formed across the east, west, north and south, covering the whole country, and connecting overseas. Pipeline transportation has become the deployment of strategic energy such as oil and gas. The main method of del...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17D5/02
Inventor 张金权王小军焦书浩王飞赵锋闫会朋杨文明李维张欣任培奎
Owner BC P INC CHINA NAT PETROLEUM CORP
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