【摘要】 利用光纤光栅对温度和应变同时敏感的特性,我们设计制作了一款满足地震前兆观测中地温观测精度要求的双金属光纤光栅温度传感器,并首次对温度增敏后的光纤光栅传感器样品进行了精度分析,得到该传感器的精度达到±0.05℃,获得了现今光纤光栅温度传感器最高的分辨率0.0014℃/pm.该传感器的成功研制从实验上证明了光纤光栅用于地震前兆观测的可行性,为地震前兆观测的光学化打下了坚实的基础.更多还原

【Abstract】 Basing on the character that Fiber Bragg Grating(FBG) is sensitive to both temperature and strain,by using Al and Fe-Ni alloy′s bimetal structure,we successfully design and manufacture a high accuracy FBG temperature sensor for earthquake premonition.Furthermore,we analyze the accuracy of the FBG sensors with enhanced sensitivity for the first time,and get its accuracy is up to ±0.05℃ with highest resolution ever in all FBG temperature sensors(0.0014℃/pm).This work experimentally proves the feasibility of using FBG in the earthquake premonition monitoring,and builds the foundation for the application of optic technology in earthquake premonition monitoring.更多还原