摘要
介绍了一种光纤光栅(FBG)温度增敏装置,并从理论上分析了其增敏原理.使用这种温度增敏结构,制作了一款高灵敏度光纤光栅温度传感器.将增敏光纤光栅传感器和高精度石英温度传感器一同放置在地下流体观测井中进行了长期的观测实验,实验后对增敏光纤光栅传感器的性能做了分析.实验中发现,增敏光纤光栅传感器在初期会有较大的零点漂移,在传感器工作一段时间后漂移减弱,然后传感器可以正常工作.把光纤光栅传感器稳定工作后测量数据与高精度石英温度传感器测量数据进行比较,显示出增敏光纤光栅传感器测温性能良好.通过观测数据计算和分析,对光纤光栅传感器的漂移原因做了初步的分析.
A FBG (fiber Bragg grating) temperature-enhancing device was introduced and analyzed theoretically. Using such a device a high temperature-sensitivity FBG sensors was produced. Then the FBG sensors were put into an underground fluid observation well with a high-accuracy quartz temperature sensor for a long period experiment and the performance of the temperature-sensitivity enhanced FBG sensor was analyzed. In the initial period of the experiment, the FBG sensors had a large zeros drift. The drift decreased with the time going on, and then the FBG sensor worked properly. Comparing with the high-accuracy quartz temperature sensor, the FBG sensor worked well. The reason why the sensors drift was preliminary analyzed by using the observation data.
出处
《地球物理学进展》
CSCD
北大核心
2013年第5期2767-2772,共6页
Progress in Geophysics
基金
国家科学自然基金项目资助(40974109)
关键词
光纤光栅
温度传感器
温度灵敏度
稳定性
地温观测
Fiber Bragg Grating, temperature sensor, temperature sensitivity, stability, geotemperature observation