摘要
针对光纤光栅解调过程中拟合算法优化选取问题,基于自行研制的光纤光栅解调系统,研究高斯拟合算法与三次样条插值算法对该系统解调精度的影响。实验结果表明,两种算法解调精度都很高,三次样条插值算法运算简单,速度更快,在动态拟合中更有优势。经过数字低通滤波与三次样条插值后,解调系统对于应变检测精度可达10με,线性拟合系数在0.999以上。
This paper tries to find the optimal fitting algorithm for the demodulation of the FBG sensor. Therefore,here Gaussian fitting algorithm and cubic spline interpolation algorithm are studied for demodulation. Experiment results suggest both of them have good demodulation accuracy. However,the cubic spline interpolation algorithm is simple,faster and more appropriate for dynamic fitting. After digital low-pass filtering and cubic spline interpolation,the demodulation system can achieve a deformation detection accuracy of 10 με,and the linear fitting coefficient is above 0.999.
作者
李宁
王东
王宇
白清
周慧栋
靳宝全
LI Ning;WANG Dong;WANG Yu;BAI Qing;ZHOU Huidong;JIN Baoquan(Key Laboratory of Advanced Transducers and Intelligent Control System,Ministry of Education and Shanxi Province,Taiyuan University of Technology,Taiyuan 030024,China;State Key Laboratory of Coal and CBM Comining,Jincheng Shanxi 048012,China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2019年第5期711-714,共4页
Chinese Journal of Sensors and Actuators
基金
山西省重点研发计划(一般)社会发展项目(201703D321034)
山西省煤层气联合研究基金资助项目(2015012005
2016012011)
山西省自然科学基金项目(201601D021068)
关键词
寻峰算法
光纤光栅
应变检测
高斯拟合
三次样条插值
数字低通滤波
peak finding algorithm
fiber grating
Strain detection
Gaussian fitting
cubic spline interpolation
digital low-pass filtering
作者简介
第一作者:李宁(1993-),男,河南焦作人,硕士研究生,主要研究领域为分布式光纤传感,li759591154@163.com;靳宝全(1972-),导师,通讯作者,男,山西忻州人,博士,教授,主要研究方向为光纤传感,jinbaoquan@tyut.edu.cn。
