分布式光纤传感器裂缝传感模型试验(英文)

Model Test and Research on Crack Sensing Using Distributed Fiber Sensor

基于光时域反射技术及瑞利散射,构建全自动控制的高精度力-光耦合试验系统,进行了分布式光纤传感器裂缝传感模型试验,研究了混凝土模型力-光本构关系,试验中组合传感光纤初始感知缝宽达0.1mm,光纤传感动态范围达5.3mm,定位精度达到0.2m,并根据试验数据拟合出半经验公式。

Based on Optical Time-Domain Reflectometry and Rayleigh scattering, fully automatic control mechanics-optics coupling test system was designed for model tests of crack sensing and the constitutive relation of crack sensing using distributed fiber sensor was investigated. Its initial sensing crack width attained 0.1 mm, dynamic sensing range reached 5.3 mm and positioning precision achieved 0.2 m. And a semi-empirical formulae was fitted from data.