落球法测定液体黏滞系数的改进及实验探究

doi:10.14139/j.cnki.cn22-1228.2023.04.006

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摘要

对传统落球法测液体黏滞系数的实验进行改进:自行设计 3D 打印盖并与电磁铁组合，实现小钢球沿量筒的中心轴线下落;利用 Phyphox App 进行装置水平调节;利用 PASCO Capstone 视频分析软件实时追踪小球的位置;利用 Matlab 进行结果和不确定度的计算。改进后的实验结果的百分误差大幅度减小，测量结果准确度和效率大大提高。此外，还研究了小球直径、量筒内径对黏滞系数的影响。

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	赵新丽
	朱新梅
	钱立宴
	吴永萍

关键词: 落球法黏滞系数电磁铁视频分析

Abstract:

The experiment of measuring the viscosity coefficient of liquid by the traditional falling ball method is improved:the 3D printing cover is designed by ourselves and combined with electromagnet to realize the small steel ball falling along the central axis of the measuring cylinder;Use the mobile Phone Phyphox App to adjust the device level;Use PASCO Capstone video analysis software to track the position of the ball in real time;Matlab is used to analyze the results and uncertainty．Compared with the traditional manual visual method，the experimental accuracy and efficiency of the improved method are improved．In addition，the effects of ball diameter，inner diameter of measuring cylinder were also studied．

Key words: falling ball viscosity coefficient electromagnet video analysis

发布日期: 2023-08-25

ZTFLH:

O 4-33

引用本文:

赵新丽, 朱新梅, 钱立宴, 吴永萍. 落球法测定液体黏滞系数的改进及实验探究 [J]. 大学物理实验, 2023, 36(4): 28-31.
ZHAO Xinli, ZHU Xinmei, QIAN Liyan, WU Yongping. Improvement and Experimental Exploration of Measuring Liquid Viscosity Coefficient by Falling Ball Method . Physical Experiment of College, 2023, 36(4): 28-31.

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http://dawushiyan.jlict.edu.cn/CN/10.14139/j.cnki.cn22-1228.2023.04.006 或 http://dawushiyan.jlict.edu.cn/CN/Y2023/V36/I4/28

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