基于螺线形光纤的液体质量分数传感器  

Liquid mass fraction sensor based on spiral fiber

作　　者：许鸣媛 黄婉玲 秦言 赵改清[1,2] 余陨金[1] 陈郁芝 XU Mingyuan;HUANG Wanling;QIN Yan;ZHAO Gaiqing;YU Yunjin;CHEN Yuzhi(College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,China;College Physics Experiment Teaching Center,Shenzhen University,Shenzhen 518060,China;Shenzhen Key Laboratory of Sensor Technology,Shenzhen University,Shenzhen 518060,China)

机构地区：[1]深圳大学物理与光电工程学院,广东深圳518060 [2]深圳大学大学物理实验教学中心,广东深圳518060 [3]深圳大学深圳市传感器技术重点实验室,广东深圳518060

出　　处：《物理实验》2023年第8期56-60,共5页Physics Experimentation

基　　金：深圳湾实验室基础研究项目(No.SZBL2021080601012);深圳市高等院校稳定支持计划面上项目(No.20200812115548001)。

摘　　要：设计了基于螺线形光纤的液体质量分数测量装置.在传输光纤的中间部位制作去包层裸光纤,当裸光纤与不同质量分数的溶液接触时,光纤中传输光的强度将随液体质量分数的升高而损耗增大,以此建立传输光强与质量分数的对应关系.设计了螺线形裸光纤传感器,研究了螺线形光纤设计参量——曲率半径和圈数对液体质量分数检测灵敏度和分辨率的影响.优化后的传感器对NaCl溶液的检测灵敏度为质量分数变化1%引起0.626 mV的检测电压变化,质量分数分辨率达到1.1×10^(-3),且检测重复性好.A liquid mass fraction measuring device based on spiral fiber was designed,where uncoated bare fiber was prepared in the middle of the transmission fiber.When the bare fiber entered NaCl solution with different mass fraction,the transmission loss of incident light in the fiber increased with the increasing liquid mass fraction.Thus,the corresponding relationship between the transmission light intensity and the mass fraction was established.In this paper,the influence of radius of curvature and turns on the sensitivity and resolution of the proposed sensor was studied.After the optimization of structural parameters,the results showed that the sensitivity of the designed spiral fiber sensor was obtained to be 0.626 mV per 1%for NaCl solution detection,and the mass fraction resolution reached 1.1×10^(-3),while the detection repeatability also has good performance.

关 键 词：液体质量分数 折射率 光纤传感 

分 类 号：TH741[机械工程—光学工程]