Permafrost region oil-gas pipeline ambient temperature monitoring system

Abstract

The invention provides a permafrost region oil-gas pipeline ambient temperature monitoring system based on a fiber Bragg grating sensing technology. A fiber Bragg grating temperature sensor set is arranged on the surface and the periphery of an oil-gas pipeline (2) in a permafrost region. All fiber Bragg grating temperature sensors are connected in series in a welding mode and are guided into a monitoring station through an optical cable (12) which is connected with an optical switch (13). The optical switch (13) is connected with a fiber Bragg grating demodulation instrument (14) which is connected with a lower computer (15). Data preprocessed by the lower computer are transmitted to a low orbit satellite (17) through a satellite communication module (16). The low orbit satellite (17) sends the data to a satellite communication module (18) in a forwarding mode. The satellite communication module (18) transmits the received data to an upper computer (19) for analyzing and processing. The permafrost region oil-gas pipeline ambient temperature monitoring system is high in accuracy and stability and low in cost.

Description

technical field [0001] The invention is a temperature monitoring system around oil and gas pipelines in permafrost regions based on fiber grating sensing technology, and relates to the technical fields of length measurement, temperature measurement, other types of measurement, general control systems and pipeline systems. Background technique [0002] Frozen soil is a special kind of soil, the temperature is negative temperature or zero temperature, and the soil containing ice is called permafrost. According to the length of the frozen state of the soil, frozen soil can generally be divided into short-term frozen soil (a few hours to half a month), seasonal frozen soil (half a month to several months) and permafrost (more than two years). my country's permafrost is very developed. The permafrost area is about 2.11 million square kilometers, accounting for 23% of my country's total land area and ranking third in the world. The area of ​​permafrost is about 5.14 million square...

AI Technical Summary

Problems solved by technology

[0007] Although domestic and foreign pipeline operators have taken active measures to deal with frost heaving and thawing disasters in permafrost regions, the formation mechanism of frost heaving and thawing disasters is very complicated, and the characteristics of permafrost in different regions are different. There is no mature monitoring technology that can monitor the impact of frost heaving and thawing disasters on pipelines

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