分布式光纤信号响应与荷载运动特征关系研究

针对道路结构监测智能化的需求,引入分布式光纤技术用于监测道路结构状况。文中通过成型植入光纤传感器的车辙板试件,研究光纤信号强度和敏感度在不同运动特征荷载作用下的变化规律。结果表明,在室内车辙试验条件下,不同位置光纤的信号强度-胶轮速度-加速度三维散点图在波峰波谷的位置分布上呈现明显区别,并且光纤信号敏感度与胶轮速度、加速度间具有良好的线性关系。

Study on the Relationship between Distributed Fiber Signal and Load Motion Characteristics

In response to the need for intelligent monitoring of road structure,distributed fiber optic technology was introduced to monitor the road structure.The rut plate specimens with fiber-optic sensors were molded to study the variation of fiber signal strength and sensitivity under different motion characteristics.The results show that under the indoor rutting-test's condition,the fiber signal strength-rubber wheel speed-acceleration three-dimensional scattergram shows a clear difference in the position distribution of the peaksand troughs,and the fiber signal sensitivity and the rubber wheel speed and acceleration have good linear relationship.