摘要
针对微通道内液体温度的检测问题,发展了一种基于激光背向散射干涉(back-scattering interferometry,BSI)和热光效应的透明微通道内液体温度检测技术。当微通道内液体温度发生变化时,由于热光效应液体的折射率会发生改变,从而使得BSI干涉条纹发生移动。文中以超纯水为例,采用波长为532 nm的激光作为光源,石英毛细管作为微通道,利用傅里叶变换对不同温度下的BSI干涉条纹光强曲线进行处理,建立了温度与BSI信号相位值之间的关系,从而实现了透明微通道内水温的高灵敏度非接触式定量检测,所得的温度分辨率为0.003℃.
A method based on back-scattering interferometry(BSI)and thermo-optic effect was developed for the quantitative detection of the liquid temperature in transparent microchannel.When the temperature of the liquid changes,the refractive index also changes owing to the thermo-optic effect,leading to the movement of BSI interference fringes.To prove this concept,ultrapure water was chosen as the analyte,a laser with the wavelength of 532 nm was used as the light source,the quartz capillary was used as the microchannel.The intensity curves of BSI interference fringes for different temperature of water were processed by Fourier transform,the relationship between water temperature and the phases of BSI signals was established,and the temperature of water was detected with a resolution of 0.003℃.
作者
陈小红
张校亮
谭慷
李晓春
CHEN Xiaohong;ZHANG Xiaoliang;TAN Kang;LI Xiaochun(College of Physics and Optoelectronics,Key Laboratory of Advanced Transducers and Intelligent Control System,Ministry of Education and Shanxi Province,Taiyuan University of Technology,Taiyuan 030024,China;College of Biomedical Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《太原理工大学学报》
CAS
北大核心
2020年第2期316-320,共5页
Journal of Taiyuan University of Technology
基金
国家自然科学基金资助项目(61775157,11504259,21874098,81741095,21575098)
山西省应用基础研究面上青年基金资助项目(201801D221194)
山西省平台基地和人才专项-优秀人才科技创新资助项目(201605D211033)
山西省高等学校优秀青年学术带头人支持计划
关键词
温度检测
微通道
背向散射干涉
热光效应
折射率
temperature detection
microchannel
back-scattering interference
thermo-optic effect
refractive index
