Temperature and leakage monitoring optical cable network based on heat distribution pipeline

Abstract

The invention provides a temperature and leakage monitoring optical cable network based on a heat distribution pipeline. On the basis of a heat distribution pipeline network, optical cables are pavedall along the heat distribution pipelines; by utilizing a monitoring mode switching device, not only amplitude variation and position information can be obtained through correspondence relation between amplitude variation of a Rayleigh scattering light interference phase signal and temperature variation and/or noise disturbance signals caused by leakage to determine pipeline leak points, but alsotemperature information of each point along a fiber can be obtained through correspondence relation between temperature and frequency shift of a Brillouin light scattering signal and by combining positioning information of Fresnel light reflection information, thereby helping to realize whole-course no-blind-area leakage monitoring and temperature abnormity monitoring of each heat distribution pipeline of the heat distribution pipeline network, enabling the pipeline leakage points or temperature abnormity hidden troubles to be found in time and promoting safe and high-quality operation of theheat distribution pipelines.

Description

technical field [0001] The present invention relates to thermal pipeline networking technology, in particular to a thermal pipeline-based optical cable network for temperature measurement and leak detection. Based on the thermal pipeline network, optical cables are laid on the thermal pipeline throughout the entire process, and the monitoring mode switching device can be used. The corresponding relationship between the amplitude change of the Rayleigh scattered light interference phase signal and the temperature change and / or noise disturbance signal caused by the leakage, the amplitude change and its position information can be obtained to determine the leakage point of the pipeline, and the Brillouin light scattering signal can be used to The corresponding relationship between frequency shift and temperature and the positioning relationship of Fresnel light reflection information are used to obtain the corresponding temperature information of each point along the optical fibe...

AI Technical Summary

Problems solved by technology

The inventors found that the thermal pipelines in the general thermal pipeline network are located underground in the city, and the environment is complex. The monitoring of their operation is mainly carried out through the thermal inspection room, and for the entire pipeline network, the thermal inspection room can only be located in scattered locations. Therefore, the selective monitoring of the thermal inspection room is impossible to realize the monitoring of the whole network without blind spots, that is to say, the hidden dangers of accidents located in blind spots have become pain points that may lead to major accidents.

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