基于布里渊散射光纤传感技术的温度和应变同时测量误差分析  

Error analysis of simultaneous measurement of temperature and strain based on Brillouin scattering optical fiber sensing technology

作　　者：王成亮[1] 官国飞 徐妍 蒋超[1] WANG Chengliang;GUAN Guofei;XU Yan;JIANG Chao(Jiangsu Frontier Electric Technology Co.,Ltd.,Nanjing 211103,China)

机构地区：[1]江苏方天电力技术有限公司,南京211103

出　　处：《光通信技术》2021年第11期11-17,共7页Optical Communication Technology

基　　金：江苏方天电力技术有限公司科技项目(批准号:KJ201917)资助。

摘　　要：为了提高分布式光纤传感系统的准确性,理论上比较了多参数同时测量与单参数测量时温度、应变的误差标准差,指出在典型配置下双光纤或双波长方式的同时测量误差标准差可达单参数测量法的9~850倍,双段光纤法应变误差标准差为单参数测量法的1.4倍。采用基于伪Voigt模型的拟合算法提取布里渊频移,计算结果验证了以上结论。In order to improve the accuracy of distributed optical fiber sensing system,the errors standard deviation of temperature and strain in multi parameter simultaneous measurement and single parameter measurement are compared theoretically.It is pointed out that under the typical configuration,the simultaneous measurement error standard deviation of double-fiber or double-wavelength method can reach 9~850 times that of single parameter measurement method,and the strain error standard deviation of double segment optical fiber method is 1.4 times that of single parameter measurement method.The fitting algorithm based on the pseudo-Voigt model is used to extract the Brillouin frequency shift.The calculation results validate the above conclusions.

关 键 词：分布式光纤传感 布里渊散射 温度和应变同时测量 误差分析 双光纤法 双波长法 

分 类 号：TN212.9[电子电信—物理电子学]