摘要
利用长周期光纤光栅(LPFG)和高双折射光纤(HBF)环镜的谐振波长对温度和应变的灵敏度差异,设计了温度和应变同时区分测量系统。在理论分析的基础上,分别测定了LPFG以及HBF环镜谐振波长对温度和应变的灵敏度系数,构建相关系数矩阵方程,实现温度和应变区分测量。实验测得该系统的温度和应变测量精度分别为±0.36℃和±13.7με。利用温度与应变的同时测量数据以及温度实验数据,解析到应变的变化曲线,验证了方法的准确性。实验结果表明,本文方案能较好地解决测量中存在的应变和温度间的交叉敏感问题,有效地提高了系统的测量精度。
A simultaneous measurement system of temperature and strain is proposed using a long period fiber grating（LPFG） and a high-birefringence fiber（HBF） loop mirror,based on their resonant wavelengths corresponding to different temperatures and strain sensitivities.Based on the theoretical analysis,the resonant wavelength response sensitivities to temperature and strain for long-period fiber grating and high-birefringence fiber loop mirror are experimentally determined,respectively.And then,the correlation coefficient matrix is constructed,so temperature and strain are discriminated.In the system,the temperature and strain measurement accuracies are ± 0.36 ℃ and ± 13.7 με,respectively.With the experimental data of temperature and the simultaneous measured experimental data of temperature and strain,the analytical curve of the strain is calculated to verify the validity of the system.The results show that this system can solve the cross-sensitivity problem in the measurement of strain and temperature,and can effectively improve the system accuracy.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2011年第7期1042-1045,共4页
Journal of Optoelectronics·Laser
基金
国家自然科学基金资助项目(61074163)
