基于分布式光纤传感的长大桥健康监测应用研究
Application Research on Health Monitoring of Long Bridge Based on Distributed Optical Fiber Sensing
摘要:
本文提出采用布里渊光时域分析技术,在某长大桥的行车方向布设传感光缆,通过荷载对比、长期应变监测等试验,实现桥梁纵向整体的线性应变测量。结果证明该技术既突破了传统点式传感器的空间连续监测瓶颈,实现分布式连续应变测量,又能用于桥梁车流荷载信息的监控及趋势预测等,对桥梁等重大结构的健康监测具有重要意义。
Abstract:
In this paper, the technique of Brillouin optical time domain analysis has been applied to the bridge. By laying optical sensing fiber cables, the total strain distribution along the bridge has been obtained. We also compare the experimental result with traditional sensors by load test and long-term strain monitoring. The result shows that this technique is able to overcome the problem of distributed monitoring of traditional point-based sensors, and predicts the trend of strain evolution, which makes it a highly competitive candidate for future structural healthy monitoring.
参考文献
[1]
|
Tkach, R.W., Chraplyvy, A.R. and Derosier, R.M. (1986) Spontaneous Brillouin Scattering for Single Model Optical Fiber Characterisation. Electronics Letters, 22, 1011-1013. https://doi.org/10.1049/el:19860691
|
[2]
|
Bao, X., Web, D.J. and Jackson, D.A. (1994) Combined Distributed Temperature and Strain Sensor Based on Brillouin Loss in an Optical Fiber. Optical Letters, 19, 141-143. https://doi.org/10.1364/OL.19.000141
|
[3]
|
Bao, X.Y., DeMerchant, M., Brown, A. and Bremner, T. (2001) Tensile and Compressive Strain Measurement in the Lab and Field with He Distributed Brillouin Scattering Sensor. Journal of Lightwave Technology, 19, 1698-1704.
https://doi.org/10.1109/50.964070
|
[4]
|
Brown, A.W., DeMerchant, M.D., Bao, X.Y., et al. (1998) Advances in Distributed Sensing Using Brillouin Scattering. Smart Structures and Materials, 1, 294-300. https://doi.org/10.1117/12.316985
|
[5]
|
朱建朝, 李湘云, 冯亚非, 郑欢, 方继伟, 刘胜春. 分布式光纤传感技术在桥梁静载试验中的应用[J]. 交通科技, 2019(2): 36-38+47.
|
[6]
|
魏华, 王劲松, 尚刚, 冯亚非, 郑欢, 刘胜春. 混凝土桥梁预埋分布式传感光缆应变监测研究[J]. 交通科技, 2019(6): 72-75.
|