以無線感測儀器監測自然頻率之研究－寶橋及萬壽橋為例

RESEARCH ON MONITORING THE NATURE FREQUENCY OF BRIDGES BY USING WIRELESS SENSORS-BAO BRIDGE AND WANSHOU BRIDGE FOR EXAMPLE

10.6652/JoCICHE.202111_33(7).0005

曾惠斌(Hui-Ping Tserng)；陳弘毅(Hung-Yi Chen)；李璧汝(Pi-Ru Lee)；陳靜韋(Ching-Wei Chen)

橋梁淘刷 ； 微振量測試驗 ； 橋梁監測 ； 無線感測 ； bridge scouring ； ambient vibration test ； bridge monitoring ； wireless sensing

中國土木水利工程學刊

33卷7期（2021 / 11 / 01）

517 - 527

繁體中文

全球氣候變遷，極端氣候增加，大雨使暴漲的溪水淘刷橋梁，如何監測橋梁的淘刷情況，成為重要的課題。本研究利用無線感測儀器，對橋梁進行微振量測試驗，將測得之加速度值進行快速傅立葉轉換（FFT）及Welch Method分析，取得橋梁之自然頻率。目前市面上已有多種微振量測儀器，但以有線量測儀器居多，且儀器價格高昂，對於現地監測較不適用，故本研究利用無線感測儀器進行實測，無線感測儀器採用加速度計MMFKB12VD，以及使用Arduino Uno、Xbee無線傳輸模組等開源軟體（Open Source），進行資料蒐集與傳輸，再以MATLAB作為資料處理及示波器，取代一般商用儀器專利保護限制，對後續橋梁監測上能有更廣泛的應用。

Due to global climate change, extreme climates have increased. The heavy rain caused the swelling stream to scour the bridges. How to monitor the scouring of bridges has become an important issue. This research uses wireless sensing instruments to conduct Ambient Vibration Tests on the bridges, and then uses Fast Fourier Transform (FFT) and Welch Method analysis on the measured acceleration to obtain the natural frequency of the bridge. There are many kinds of ambient vibration instruments available, but most of them are costly wired instruments, which are not suitable for on-site monitoring. Therefore, this study uses a wireless sensing instrument, which is composed of an accelerometer (MMFKB12VD), Arduino Uno, and Xbee (Open Source) to collect and transmit data, and then process and show the results by MATLAB. In this way, the limitation of patent protection for general commercial instruments can be avoided, and it can be more widely used in subsequent bridge monitoring.

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