利用光拍频波测量液体浓度  

Measurement of Liquid Concentration Using Optical Beat Frequency Wave

作　　者：杨天基 陈静 李陈南 岳雨星 宋金士 易庭丰[1] 吕宪魁[1] 郑永刚[1] 刘文广[1] 冯洁[1] YANG Tianji;CHEN Jing;LI Chennan;YUE Yuxing;SONG Jinshi;YI Tingfeng;LYU Xiankui;ZHENG Yonggang;LIU Wenguang;FENG Jie(School of Physics and Electronic Information,Yunnan Normal University,Kunming,Yunnan 650500)

机构地区：[1]云南师范大学物理与电子信息学院,云南昆明650500

出　　处：《物理通报》2024年第9期151-154,共4页Physics Bulletin

基　　金：国家级线下一流课程“基础物理学实验(二)”;云南省省级线下一流课程“基础物理学实验(二)”;高等学校教学研究项目,项目编号:DWJZW202235xn.

摘　　要：以溶液浓度与其折射率之间的联系作为出发点,通过理论推导得出当光在液体中的传播路程一定时,液体的浓度变化量与光通过液体后波形移动的距离成线性关系.基于该关系,用具有低频性的光拍频波为波源,搭建了一套表征并测量液体浓度的实验装置,验证该线性关系并得出线性相关参数,再利用该线性关系实现液体浓度的测量.Based on the relationship between the concentration of the solution and its refractive index,it is theoretically deduced that when the distance of the light in the liquid propagation is constant,the concentration change of the liquid is linearly related to the distance of the waveform movement when the light wave passes through the liquid.Based on this relationship,an experimental device for characterizing and measuring liquid concentration was built with a low-frequency optical beat wave as the wave source.The linear relationship and linear correlation parameters were verified and obtained,and then the linear relationship was used to measure the liquid concentration.

关 键 词：液体浓度 光速测量仪 光拍频波 线性关系 

分 类 号：O439[机械工程—光学工程] TH70[理学—光学]