摘要
介绍了基于光纤光栅的传感原理,完成了对光纤光栅温度传感器的实验室标定,得到了每个传感器专门的参数。通过对传感器进行铠装封装,排除了海水压力等因素的影响;设计了200 m的光纤光栅传感器阵列,并将其应用到海洋环境探测中。试验对中国南海海域200 m深的海水剖面温度进行了测试。提出了对测量数据应用Levenberg-Marquardt算法进行曲线拟合处理的方法,并验证了此方法的有效性。通过曲线拟合,温度测量的精度高于0.2℃,达到了试验目的,对海洋环境的研究有实用价值。
The principle of FBG temperature monitoring was introduced,the calibration work for FBG temperature sensors were finished in laboratory,each sensor＇s specific parameters was obtained.From sophisticated sensor package,the sensors can eliminate the effect by water pressure and other factors,then sensors were screened out for experiment.200 m optic fiber Bragg grating sensor array was designed,and was used in marine environment detection.The experiments were performed in South China Sea and got 200 meters deep seawater profile temperature.The curve fitting method was proposed to process the data based on Levenberg-Marquardt algorithm.By curve fitting to the data acquired,the precision was better than 0.2 ℃,which verified the effectiveness of the method.This result has practical value for marine environment detection.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2011年第2期80-83,共4页
Journal of North China Electric Power University：Natural Science Edition
基金
国家"863"项目"光纤温度链及测量技术"(2006AA09Z141)
华北电力大学青年教师基金(200811006)
关键词
光纤光栅
传感系统
光栅阵列
曲线拟合
optic fiber grating
sensing system
fiber grating array
curve fitting
