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Utility pipe gallery health monitoring system based on fiber grating

A health monitoring system and fiber grating technology, applied in the direction of measuring devices, instruments, etc., can solve the problems of weakening the applicability and durability of concrete pipe corridors, and the adverse effects of pipelines, achieving powerful functions and satisfying the effect of operation and maintenance management

Pending Publication Date: 2019-01-22
SHANGHAI ELECTRICAL APPLIANCES RES INSTGROUP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These problems will not only seriously weaken the applicability and durability of the concrete pipe gallery, but also have adverse effects on various types of pipes attached to the pipe gallery

Method used

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  • Utility pipe gallery health monitoring system based on fiber grating
  • Utility pipe gallery health monitoring system based on fiber grating
  • Utility pipe gallery health monitoring system based on fiber grating

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Experimental program
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Embodiment Construction

[0038] Below in conjunction with specific embodiment, further illustrate the present invention.

[0039] 1. Fiber Bragg Grating Technology

[0040] A fiber grating is a section of optical fiber with a structure such as figure 2 shown. The core of the optical fiber has a structure in which the refractive index changes periodically. According to the mode coupling theory: λ B =2nΛ, where, λ B is the center wavelength of the fiber grating, Λ is the grating period, and n is the effective refractive index of the fiber core. The wavelength is λ B The wavelength is reflected back by the fiber grating.

[0041] Reflected central wavelength signal λ B It is related to the grating period Λ and the effective refractive index n of the fiber core, so when the outside world is measured, the temperature, stress and magnetic field of the fiber grating will change, and the center wavelength of the reflection will change. That is to say, the change of the central wavelength of the refle...

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Abstract

The invention provides a utility pipe gallery health monitoring system based on a fiber grating. The system comprises distributed type multi-category sensor synchronous acquisition equipment, whereinan upper computer is connected with the distributed type multi-category sensor synchronous acquisition equipment; a sensor used for monitoring a concrete pipe gallery seam position crack, a sensor used for monitoring concrete pipe gallery sedimentation, a sensor used for monitoring the horizontal displacement of the concrete pipe gallery, and a sensor used for monitoring a running water pipeline flange crack are independently arranged in the utility pipe gallery, and the sensors are all fiber grating sensors; and the distributed type multi-category sensor synchronous acquisition equipment collects the data of each sensor in real time, and sends the data of each sensor to the upper computer, and meanwhile, the command of the upper computer is received to carry out corresponding data acquisition so as to realize utility pipe gallery health monitoring. By use of the system, advanced technologies, including the sensors, computers, communication, networks and the like, are combined into a whole, functions are powerful, the system can be truly used for the structural damage and state evaluation of the underground utility pipe gallery for a long time, and the requirements of the operationand maintenance management of the underground utility pipe gallery are met.

Description

technical field [0001] The invention relates to an intelligent underground comprehensive pipe corridor health monitoring system based on optical fiber gratings, belonging to the technical field of monitoring and management of urban underground pipeline comprehensive corridors. Background technique [0002] Urban underground pipeline comprehensive corridor, referred to as "comprehensive pipeline gallery" or "common ditch", refers to a tunnel that gathers all kinds of public pipelines installed on the ground, underground or overhead, and leaves passageways for maintenance personnel structure. That is to build a tunnel space underground in the city, integrate various pipelines such as municipal, electric power, communication, gas, water supply and drainage, etc., set up special inspection ports, hoisting ports and monitoring systems, and implement unified planning, design, construction and management , Completely change the chaotic situation where each pipeline was constructed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02
CPCG01D21/02
Inventor 姚炜戚琛琛唐晓俊孙迎卿朱禛
Owner SHANGHAI ELECTRICAL APPLIANCES RES INSTGROUP
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