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中文摘要：
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。
英文摘要：
In the paper a new method for bridge deflection measurement, a testing system, mainly made up of fiber Bragg gratings （FBG） liquid pressure sensors and communicating pipe is brought forward for the first time. The author has schemed out FBG liquid pressure sensor and done some experiments to test the properties of the sensor and its system. The results show that the system has simple structure, higher measurement precision and better dynamic property. With optimization of sensor＇s structure and improvement of testing instrument＇s stability, the system is capable of meeting the demand for long-term monitoring of bridge deflection.
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