The study of innovation sensor networks for bridge monitoring application
Date Issued
2009
Date
2009
Author(s)
Wong, Shih-Cheng
Abstract
It’s is so many natural disaster like typhoon and earthquake in Taiwan every year. This study chose the wireless sensor network (WSN) and the fiber Bragg grating (FBG) system to measure together for the feasibility of structure monitoring on bridge in heavy rain and wind. Used remote control or internet can monitor the bridge without people in-site and handle the damage immediately. It’s let people more safely for pass through. For the hardware part, integrate system with acceleration, temperature and humidity to measure the environment condition around the bridge. By some experiment to verify the cable monitoring system of cable-stayed bridge, it can receive the acceleration induced by cable vibration and to estimate the damping ratio of different mode shape. The FBG sensor is low loss, less interference and so on, so many advantages. Chose the Chi-Lu cable-stayed bridge in Nantou County as an example, FBG monitoring system can measure whole 68 cables of the bridge at the time, get the detail every part of bridge. To come over a long term monitoring, observing the change of temperature on cable. Use this result to define the bound of the safe range of cable frequency. Based on the result, it can diagnose the situation of the bridge.pplying the technology of structure monitoring system constructed above-mentioned, it provides a solution which is economical to use large number sensors at many place in-situ. Integrating system with varied sensors and constructing robust monitoring system in field. The system improves the bridge technology of sustainable development.
Subjects
Bridge monitoring
Wireless sensor network
Fiber Bragg Grating
Type
thesis
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