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对光纤布拉格光栅应变与温度传感特性进行了分析 ,理论计算了波长变化对传感系数的影响 ,提出了光纤光栅应变传感的温度补偿方法 ,并理论分析了光纤光栅温度和应变传感的耦合作用。最后 ,通过材料实验与等强度梁实验研究与分析了光纤光栅的应变与温度传感特性。理论分析与实验结果表明 ,两者吻合很好 ,光纤光栅的波长变化与应变和温度存在很好的线性关系 ,波长变化对传感系数的影响很小。
The strain and temperature sensing characteristics of fiber Bragg grating are analyzed. The influence of wavelength variation on the sensing coefficient is theoretically calculated. The temperature compensation method of fiber Bragg grating strain sensing is proposed. The temperature and strain sensing of fiber Bragg grating Coupling effect. Finally, the strain and temperature sensing characteristics of fiber gratings were studied and analyzed by means of material experiments and isotropic beams. The theoretical analysis and experimental results show that the two agree well with each other. The wavelength variation of FBG has a good linear relationship with strain and temperature, and the influence of wavelength on the sensing coefficient is small.