Bragg光栅式应变传感器的传感特性研究

光纤Bragg光栅是一种新型的传感元件,其原理是利用波长解调的方法将被测的信号转化为光栅反射波长的偏移量,同时反射波长不受入射光的功率波动或光路系统损耗的影响。光纤Bragg光栅应变式传感器因此具备良好的可靠性、不受电磁干扰、不易腐蚀,同时最大的优点是在一根光纤上将多个光纤光栅应变传感器串接组成构成阵列开展分布式测量等优点,在逐渐应用于各类力学检测领域。本文着重对光纤Bragg光栅温度和应变的传感特性简要介绍并进行试验分析.

Research on Sensing Characteristics of Fiber Bragg Grating Strain Sensor

Fiber Bragg grating(FBG) used as a sensing element depends on transfering the measured information into the shift of the reflective wavelength,i. e. called wavelength demodulation,which is not affected by the light power fluctuation and system loss. Besides,FBG has advantages of good reliability,resistence to electromagnetic interference,antirust and easy organizing as FBG network by connecting together serially on a single fiber for distributed sensing,which induced the FBG sensors are widely used for monitoring or measurement. But there are many problems for further study while FBG sensor is used as embedded sensor. In this paper,we mainly focused on the experimental researches of sensor encapsulation,temperature and strain properties.