光纤光栅锚端预应力传感器的研究

The fiber bragg grating sensors for monitoring prestress of the concrete located at anchor position

针对传统检测方法长期稳定性差、不能实现分布式测量、信号不能远距离传输等缺点,基于光线光栅的优点,以及预应力钢绞线的特殊结构和复杂工作情况,提出基于光纤光栅的预应力结构锚端传感测试方案,对光纤光栅预应力传感器进行研究。实验结果表明,该传感器重复性好,测量精度高,可以满足预应力锚端监测的需要。

Many disadvantages using traditional monitoring methods, such as poor stability, no distributed measure and short measure range were not overcome, especially when structure of prestress wire was special and its working characters was complex. The optical fiber bragg grating sensing system located at anchor position was founded and the optical fiber bragg grating sensor for the prestress wire of the concrete was studied based on the merit of optical fiber Bragg grating. The experimental results indicate that this sensor has good reproducibility and high precision, and that it can be used to monitor prestress at anchor position.