Interference distributed fibre-optical pipe leakage real-time monitoring method and device

A distributed optical fiber, real-time monitoring technology, applied in measuring devices, pipeline systems, fluid tightness testing, etc., can solve problems such as the inability to realize real-time monitoring of pipelines, and achieve low engineering cost, strong anti-interference ability, and easy implementation. Effect

Inactive Publication Date: 2005-03-23
TIANJIN UNIV
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  • Interference distributed fibre-optical pipe leakage real-time monitoring method and device
  • Interference distributed fibre-optical pipe leakage real-time monitoring method and device
  • Interference distributed fibre-optical pipe leakage real-time monitoring method and device

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:

[0021] figure 1 Shown is a block diagram of a real-time monitoring system for distributed optical fiber fluid pipeline leakage based on the principle of interference. The monitoring system includes: sensing optical cable 1, couplers 2a and 2b at both ends of the sensing optical cable, guiding optical cable 3, and micro-vibration detector 4 .

[0022] Among them, the sensing optical cable 1 and couplers 2a and 2b laid along the pipeline near the pipeline constitute a high-sensitivity distributed optical fiber micro-vibration sensor, which is mainly used to detect leakage noise along the pipeline and possible pipeline leakage occurred near the pipeline. stress changes. The guiding optical cable 3 is a transmission optical fiber mainly used for propagating light waves and detecting signals. The micro-vibration detector is mainly used to emi...

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Abstract

The invention discloses a distributed optical fiber oil channel leakage monitoring method and device based on interference theory. The monitoring system needs to lay an optical cable along the channel, and forms a fiber micro oscillation sensor with the fiber in the cable. When the channel has leakage, it will generate leakage noise, thus the fiber micro oscillator sensor can measures the micro oscillation and stress change around the channel, and it can fix on the leakage position quickly and accurately. The device is made up of distributed fiber micro oscillation sensor, guiding fiber and micro oscillation detector. The technology not only can detect the leakage, but also can detect the event which can cause the leakage, and it can send out alarm and accurate localization. The device has high sensitivity and localization precise, and the disturbance ability is strong, and it is reliable.

Description

technical field [0001] The invention relates to an online real-time monitoring and positioning method and a monitoring device for fluid pipeline leakage, in particular to a distributed optical fiber sensing technology based on the principle of interference, which belongs to the technical field of pipeline monitoring. Background technique [0002] Pipeline transportation has been widely used all over the world as a safe and economical transportation method. With the continuous development of the pipeline transportation industry, in order to maintain the safe operation of the pipeline, the pipeline operation monitoring technology is also developing continuously. As the core of the pipeline monitoring, the leak detection technology has always been valued by the scientific and technological work of various countries. [0003] At present, there are many pipeline leakage detection technologies and methods at home and abroad, but most of the pipeline leakage on-line monitoring tech...

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Application Information

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IPC IPC(8): F17D5/02G01M3/00
Inventor 周琰靳世久栗大超王立坤李健
Owner TIANJIN UNIV
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