Spigot-and-socket pipeline interface deformation measurement apparatus and measurement method based on distributed fiber strain sensor

Abstract

A socket-type pipe joint deformation measurement device based on a distributed optical fiber strain sensor and a measurement method thereof belong to the field of structural health monitoring. The measuring device includes three distributed optical fibers and three bow-shaped measuring devices, and the three bow-shaped measuring devices are evenly distributed around the socket-type pipeline interface; one end of the bow-shaped measuring device is fixed on the outer wall of the insertion head, and the other end is fixed on the bearing On the outer wall of the plug, the distributed optical fibers are sequentially fixed on the outer wall of the insertion head, in the arcuate optical fiber groove and on the outer wall of the socket plug. The outer side of the bow-shaped measuring device is provided with a protective shell fixed on the socket-type tube. The measuring device can operate normally after being buried in the ground, can make the distributed optical fiber measure the deformation of the socket-type pipeline interface, broaden the application range of the distributed optical fiber in pipeline health monitoring, and is easy to operate and simple and practical in structure. By analyzing the deformation state of the actual pipe joint through the monitoring data, it can be found in time when the socket joint is dangerously deformed.

Description

technical field [0001] The invention relates to a socket-type pipe interface deformation measuring device and a measuring method based on a distributed optical fiber strain sensor, belonging to the field of structural health monitoring. Background technique [0002] With the continuous development of urbanization in China, the urban water supply system has increasingly become an indispensable basic project for the construction and development of a modern city. Among them, the structural safety of water supply pipelines is particularly critical. Deformation and destruction of water supply pipes will cause tap water pollution, road surface water and water supply suspension in some areas and other emergencies will bring a lot of inconvenience to the daily life of urban residents. Therefore, how to accurately understand the operation of underground water supply pipelines and know the structural status of water supply pipelines in time has become a difficult and challenging ta...

AI Technical Summary

Problems solved by technology

[0007] The health monitoring of distributed optical fiber pipelines is mainly to monitor the deformation of the pipelines, and the long-distance distributed monitoring of pipelines needs to meet two monitoring environmental conditions: one is that the optical fibers need to be attached to the surface of the pipe body, and the relative distance between the optical fibers must be maintained. Linear, no large bends, otherwise the optical loss caused by the bends will greatly reduce the usability and accuracy of optical fiber measurement

Second, due to the weak lo

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