落球法测量液体粘滞系数的研究与改进

Study and Improvement on Measuring Liquid Viscosity Coefficient with Falling Balls

该文对落球法测量透明液体粘滞系数的实验进行了改进和深入研究。介绍了视频分析法测量液体粘滞系数实验步骤,使用开源软件Kinovea对小球下落过程进行录像追踪,剔除不合格实验过程,对合格实验过程进行逐帧分析。该方法将实验测量精度提高至240帧/S,实验误差减小至少50%。同时深入研究了尺寸效应、边缘效应对实验测量结果的影响。

This article improves the measurements of liquid viscosity coefficient with falling ball and gives an intensive study.We briefly introduce the experimental steps for measuring the viscosity coefficient of liquids using video analysis.It employs the open-source software Kinovea to record and track the falling process of a ball,excluding any unqualified experimental procedures and analyzing qualified experiments frame by frame.This method enhances the experimental measurement accuracy to 240 frames per second and reduces experimental error by at least 50%.Moreover we intensively study the effects of size and edge on the experimental results.