摘要
为了实现传感光纤长度较短的双折射光纤环镜(Bi-FLM)传感器的在线测量,提出通过一组相邻的波峰波谷波长实现Bi-FLM应变传感器在线测量的方法。采用典型通讯波长1550nm附近的波峰波长、波谷波长及其双折射光纤初始条件,计算了应变大小。结果表明,该方法计算应变均与给定应变基本吻合,3组不同的组合方式计算的应变与给定应变的最大误差为0.0296%,最小误差为-0.0003%;该方法无需人为判断,有助于实现计算机在线测量;与监测点无关,无需校准;只需0.5个周期的干涉波形,需要的信息量少。这一结果对实现传感光纤长度较短的Bi-FLM传感器在线测量是有帮助的。
In order to realize the on-line measurement of a birefringence fiber(BF)loop mirror(Bi-FLM)strain sensor with a short BF,the theoretical on-line measurements expression of a Bi-FLM strain sensor using a set of adjacent wave-valley and wave-peak wavelengths was deduced.The adjacent wave-valley and wave-peak wavelengths were near 1550nm and the BF initial conditions were used to calculate strain.The maximum error and minimum error of strain calculated by three different wavelengths combination were 0.0296%and-0.0003%,respectively.The result shows that the calculated strains are basically consistent with the given strains.The method doesn’t need human judgment.So it is helpful to realize on-line measurement by computer.The method is unrelated to the monitoring point.So the Bi-FLM sensor isn’t calibrated.In addition,the method requires less information and only needs 0.5 period of interference waveform.So it is helpful to realize the on-line measurement of a Bi-FLM sensor with a short BF.
作者
江莺
段峥
张晓丽
胡兴柳
JIANG Ying;DUAN Zheng;ZHANG Xiaoli;HU Xingliu(College of Mechanical and Electronic Engineering,Nanjing Forestry University,Nanjing 210037,China;College of Physics and Electronic Engineering,Xinyang Normal University,Xinyang 464000,China;College of Intelligent Science and Control Engineering, Jinling Institute of Technology, Nanjing 211169,China)
出处
《激光技术》
CAS
CSCD
北大核心
2020年第5期587-591,共5页
Laser Technology
基金
国家自然科学基金资助项目(51505231,61603324)
江苏省自然科学基金面上资助项目(BK20171114)。
关键词
传感器技术
在线测量
理论推导
双折射光纤环镜
应变传感器
波峰波长
波谷波长
sensor technique
on-line measurements
theoretical derivation
birefringence fiber loop mirror
strain sensor
wave-peak wavelength
wave-valley wavelength
作者简介
江莺(1976-),女,博士,副教授,主要从事光纤传感器、结构健康监测、智能控制方面的研究,E-mail:jiangying0510@sina.com。
