Device for monitoring internal corrosion of water supply pipe

Abstract

The invention belongs to the technical field of structural health monitoring, and provides a device for monitoring internal corrosion of a water supply pipe. The device is divided into a left part anda right part; each part comprises a circular powerful magnet, a wall-shaped support, a bolt, a support base plate, a laser reflector, a rod-shaped support, an optical fiber, a ceramic end head and ascrew; and the left part and the right part are axisymmetric. The device is based on the extrinsic optical fiber Fabry-Perot sensing technology and the principle that the wall thickness reduction caused by internal corrosion of the water supply pipe results in changes of the Fabry-Perot cavity length, when the wall thickness is reduced due to the internal corrosion of the water supply pipe, an interference spectrum of an optical signal in an optical fiber changes, each interference spectrum image corresponds to a cavity length delta, the nondestructive and real-time online monitoring of the internal corrosion of the water supply pipe is realized by monitoring the interference spectrum of the optical signal, and thus the internal corrosion damage of the water supply pipe can be pre-warned and maintained in time. The device is convenient to manufacture and low in investment cost, can reduce the manual operation amount and is beneficial for monitoring water supply pipelines on a large scale.

Description

technical field [0001] The invention relates to a device for monitoring internal corrosion of water supply pipes of infrastructure, belonging to the technical field of structural health monitoring, in particular to a device for monitoring internal corrosion of water supply pipes. Background technique [0002] As an important part of urban infrastructure, water supply pipelines are huge in number and widely used. At present, the vast majority of water supply pipes in my country are made of iron pipes such as cast iron pipes, ductile iron pipes, and steel pipes. However, with the increase of service time, different degrees of corrosion will occur inside the iron water supply pipeline, resulting in the thinning of the pipe wall, and even the rupture and leakage of the pipeline, affecting the safe operation of the water supply pipeline, resulting in waste of resources and economic losses. Therefore, in order to timely discover the water supply pipelines with potential safety ha...

AI Technical Summary

Problems solved by technology

However, most of these methods have problems such as high labor costs, low monitoring accuracy, inability to be online, and long-term real-time monitoring, and are highly dependent on the technical experience of the staff.

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