基于光纤Bragg光栅(FBG)传感技术的优点,提出了FBG液压传感器配合连通管的挠度测试方法,设计了FBG液压传感器,并对传感器及其系统的性能进行了实(试)验研究。结果表明:系统结构简单,测量精度高,动态性能好。通过对传感器结构的进一步优化和测试仪表稳定性的提高,系统可以满足桥梁挠度长期监测的需要。 Based on the advantages of fiber Bragg grating (FBG) sensing technology, the deflection testing method of FBG hydraulic sensor coupled with connecting pipe is proposed. The FBG hydraulic pressure sensor is designed and the performance of the sensor and its system is tested. The results show that the system has the advantages of simple structure, high measuring accuracy and good dynamic performance. Through the further optimization of the sensor structure and the improvement of the stability of the test instrument, the system can meet the needs of the long-term monitoring of the bridge deflection.