FBG application in bridge health monitoring system of Wuhan Yangtze River 2nd Bridge

Jun Liu

doi:10.1117/12.835026

5 October 2009 FBG application in bridge health monitoring system of Wuhan Yangtze River 2nd Bridge

Jun Liu

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75035H (2009) https://doi.org/10.1117/12.835026
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

For the traditional resistance strain sensor's shortage,for example,their stability,durability and monitoring scorpe could not satisfied the requirement of bridge monitoring system,put forward to adopt advanced fiber-optic bragg grating sensor and its technology to build up the bridge health monitoring system.Analysed the application scope and aim of difference kinds of fiber bragg grating sensors used, including stress strain sensors,temperature sensors,crack sensors and testing force ring sensors.According to the key construction sections as the project designed,expatiated their specific installation methods and construction craftwork in Wuhan Yangtze River 2th bridge.It formed distributed fiber sensing network of bridge with large-scale located fiber-optic bragg grating sensors, and pointed out the becareful prodeeding when to link no more than twenty sensors to one fiber for the demodulator precision.Discussed how to construct the data acquisition system and its function via the sensors and their demodulator.One fiber of the linked sensors connected to one channel of the demodulator and all together reached sixteen channels.The demodulator were connected to the switch through rj45 interface and communicated with the acquisition server.Designed the software program of data acquisition software system and the database,which used the Sqlite of the embed database to storage the configure information and receive the data through the TCP/IP protocol.It has been build a bridge health monitoring system base on fiber bragg grating technology.

Citation Download Citation

Jun Liu "FBG application in bridge health monitoring system of Wuhan Yangtze River 2nd Bridge", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75035H (5 October 2009); https://doi.org/10.1117/12.835026

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