基于音叉振动的液体黏滞系数测量方法研究  

RESEARCH ON MEASUREMENT METHOD OF LIQUID VISCOSITY COEFFICIENT BASED ON TUNING FORK VIBRATION

作　　者：冯朝欣 王子轩 周祺智 焦阳初 辜旸羽 文小青 李强[1,3] 王槿 李文华[1,3] FENG Chaoxin;WANG Zixuan;ZHOU Qizhi;JIAO Yangchu;GU Yangyu;WEN Xiaoqing;LI Qiang;WANG Jin;LI Wenhua(School of Physics,Nankai University,Tianjin 300071;College of Electronic Information and Optical Engineering,Nankai University,Tianjin 300071;National Demonstration Center for Experimental Physics Education,Nankai University,Tianjin 300071)

机构地区：[1]南开大学物理科学学院 [2]南开大学电子信息与光学工程学院 [3]基础物理国家级实验教学示范中心(南开大学),天津300071

出　　处：《物理与工程》2024年第5期160-167,188,共9页Physics and Engineering

基　　金：2021南开大学自制实验教学仪器设备项目(No.21NKZZYQ02);教育部产学合作协同育人项目(202102227007);2020高等学校教学研究项目(No.DJZW202010hb);国家基础科学人才培养基金项目(No.J1210027);南开大学物理基地能力提高项目(No.J1103208)。

摘　　要：本文提出了一种基于音叉振动的液体黏滞系数测量方法。在音叉臂底端固定振片,振片浸入测量液体中,利用电磁驱动,音叉带动振片在液体中作一维往复运动,通过测量液体黏性剪切力对振动特性的影响,来实现液体黏滞系数的测量。本文通过实验数据验证了该方法的正确性,分析了测量误差的主要来源——密度测量和共振频率漂移;加入温控装置,可以实现不同温度下液体黏滞系数的测量。该方案不仅可以加深学生对流体黏滞性及振动原理的理解,也为实验室测量液体黏滞系数提供了新方案。A method for measuring the viscosity coefficient of liquids based on the vibration of a tuning fork is proposed.A vibrating plate is fixed at the bottom of the tuning fork arm,and the plate is immersed in the liquid to be measured.By using electromagnetic driving,the tuning fork drives the vibrating plate to make one-dimensional reciprocating motion in the liquid.The measurement of liquid viscosity coefficient is realized by measuring the influence of liquid viscous shear force on vibration characteristics.The correctness of the method is verified by experimental data,and the main sources of measurement errors including density measurement and resonance frequency drift are analyzed.By adding a temperature control device,the measurement of liquid viscosity coefficient at different temperatures can be realized.The device can not only deepen studentsunderstanding of fluid viscosity and vibration principles,but also provide a new solution for measuring liquid viscosity coefficient in laboratory.

关 键 词：黏滞系数 音叉振动 阻尼因数 温度控制 

分 类 号：O552.42[理学—热学与物质分子运动论]