Underground pipeline monitoring system and method based on distributed optical fiber sensing

Abstract

The invention provides an underground pipeline monitoring system and method based on distributed optical fiber sensing. An armored photoelectric composite cable arranged on the outer side of an underground pipeline , a high-resolution optical camera with a night vision function and mounted along an underground pipeline, and an automatic monitoring and early warning system and a DSS / DTS / DAS composite distributed optical fiber sensing modulation and demodulation instrument which are arranged in a monitoring station along the line are used to construct a long-term real-time monitoring system forthe temperature, vibration and strain distribution change along the underground pipeline based on distributed optical fiber sensing. Real-time effective anti-theft, anti-excavation damage, fireproof,anti-natural and geological disaster early warning monitoring is carried out on underground pipelines and oil and gas conveying pipelines; loss can be effectively avoided or reduced; long-term stable,safe and reliable work of the underground pipelines is guaranteed; and indispensable means, systems and methods are provided for scientific management of the underground pipelines and improvement ofthe use efficiency.

Description

technical field [0001] The invention belongs to the technical field of temperature, vibration and strain measurement, in particular to an underground pipeline monitoring system and monitoring method based on distributed optical fiber sensing. Background technique [0002] Underground pipelines, especially oil and gas transmission pipelines, are the main arteries of energy transportation. They are responsible for the transmission of a large number of oil and gas resources in the country. They are related to national security, economic and social harmony, stability and development. There are more than 100,000 kilometers of pipelines in my country, and the pipelines have to pass through densely populated areas along the way. Towns, villages, farmland, rivers, swamps, deserts, roads and railways and other environments, surrounding construction, man-made damage (such as oil drilling) and natural disasters (such as natural earthquakes, floods, landslides, mudslides) etc.) and other ...

AI Technical Summary

Problems solved by technology

This kind of method is not only cumbersome to operate, high cost, waste of manpower and financial resources, but also low degree of automation, poor anti-interference ability, low sensitivity, affected by the characteristics of transported materials and transport conditions, etc., the sensitivity to small leaks is not high, and the alarm is all happened after the leak

Moreover, manual inspections will lead to missed inspections, resulting in many hidden dangers that can be prevented that cannot be dealt with in time, so that the hidden dangers will increase until an accident occurs

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