創新感測網路於橋梁監測系統之應用研究

The study of innovation sensor networks for bridge monitoring application

翁士晟(Shih-Cheng Wong)

指導教授 ： 張國鎮

國立臺灣大學/工學院/土木工程學研究所/碩士(2009年)

https://doi.org/10.6342/NTU.2009.01461

摘要

因應台灣多颱風、地震等天災的環境，橋梁監測為求在風雨中量測之可能性，本研究選擇無線傳輸系統(wireless sensor network)與光纖光柵感測器(Fiber Bragg grating)兩套系統同時監測，並配合網際網路以遠端操作或網頁即時監控，人員無需在現場即能有效之監測，當橋梁發生危害能第一時間處理，保障橋梁通行之安全性。硬體部份，整合無線感測網路系統與網路系統匹配之微感測元件，製作感測電路模組，建置之系統包含加速度、傾角、溫度及濕度等結構及環境參數感測功能。經初步試驗驗證所建置之斜張橋橋梁鋼纜量測系統，可測得鋼纜環境振動加速度頻率資訊，推估不同模態下之阻尼比。光纖光柵感測器擁有低耗能低損失不易受電子訊號干擾等優點，以南投縣集鹿大橋監測為例，可同時分別監測全數共六十八根鋼纜，即時完整取得橋梁各部細節之資訊，此兩系統經長時間量測，並觀測相對應之溫度變化，依此結果建立鋼纜之主頻偏移安全範圍，做為橋梁健康狀況之診斷。
應用上述之技術所建置之結構監測系統，提供了在符合工程經濟性前提下，於橋梁現地工址廣域佈置多點多數量測系統的解決方案。也可針對更多樣化之感測元件，如水位計、沖刷計等進行系統整合，以建置更具功能性、經濟性及擴充性的橋梁結構監測系統，提昇橋梁結構永續發展研究技術。

關鍵字

橋梁監測 ； 無線感測網路 ； 光纖光柵感測器

並列摘要

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.
Applying 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.

並列關鍵字

Bridge monitoring ； Wireless sensor network ； Fiber Bragg Grating

參考文獻

3.余炳盛、苗永德、王玉瑞。台灣的橋梁。遠足文化事業股份有限公司。民國九十六年

9.周智傑。集鹿大橋震害評估與修復之研究。國立台灣大學碩士論文。民國九十三年

14.林冠志，溫度效應對斜張橋結構行為之影響。中原大學碩士論文。民國九十四年

38.傅建豪。無線感測器網路應用於橋樑結構健康監測。國立台北科技大學碩士論文。民國九十六年

11.Shashi Moorty et al., Temperature-Dependent Bridge Movements,ASCE,2002