摘要
A novel double fiber Bragg grating（FBG） strain sensor configuration is presented. Temperature compensation method is based on double FBG moored on a rhombus frame. Through the theoretical analysis, the relation between relative shift of Bragg wavelength and the strain applied on the sensor is obtained, and the analytical expression of strain sensitivity coefficient is also given. The experiment results show that： in the strain range of 0-0. 8 mm, the relation between the relative shift of Bragg wavelength and applied strain is linear, and the dispersion of double FBG wavelength at the range of -25℃- 60℃ is 0-0. 002 nm. The strain sensitivity of the displacement sensor configuration is 0. 171 nm/με, and is nearly twice than that of single FBG sensor.
一种新奇双纤维布拉格栅栏(FBG ) 紧张传感器配置被介绍。温度赔偿方法基于两倍 FBG 在一个菱形框架上系在。Throughthe 理论分析，在在传感器上使用的布拉格波长和紧张的相对移动之间的关系被获得，并且紧张灵敏系数的分析表示也被给。实验结果显示出那：在 0 ～的紧张范围 0.8 公里，在布拉格波长和应用紧张的相对移动之间的关系是线性的，并且在 60 ℃是的 -25 ℃～的范围的两倍 FBG 波长的分散 0 ～ 0。002 nm。排水量传感器配置的紧张敏感是 0。171 nm/ με，并且将近两次比单个 FBGsensor 的。
