基于轨迹实时追踪算法测量液体黏度  

Measuring fluid viscosity using a real-time tracking algorithm

作　　者：张纾 黄斯韵 陈嘉鑫 曹芸芸 朱安萍 赵肖彤 沈环 ZHANG Shu;HUANG Si-yun;CHEN Jia-xin;CAO Yun-yun;ZHU An-ping;ZHAO Xiao-tong;SHEN Huan(College of Science,Huazhong Agricultural University,Wuhan 430071,China)

机构地区：[1]华中农业大学理学院,湖北武汉430071

出　　处：《物理实验》2022年第4期25-28,共4页Physics Experimentation

摘　　要：对落球法测量液体黏度的实验设备进行了改进,通过自制的电磁铁开关精准控制小球的下落位置和初始零速度,采用CCD采集小球下落的动态视频,再利用轨迹实时追踪算法CSRT获得小球下落的竖直位移-时间曲线,全面显示小球从进入被测液体到沉落的轨迹曲线.此外,还利用Python软件编写可视化操作界面用于数据采集、数据拟合和结果呈现.改进后的实验装置操作简单、测量数据准确.The experimental device for measuring the fluid viscosity based on the falling ball method was improved,which the beginning position and initial zero speed of the small metal ball were accurately controlled through a self-made electromagnet switch.In the experiment,a CCD was used to collect the video of the falling ball at the rate of 60 frames per second,and the time profile of the vertical displacement of the falling ball was obtained by the trajectory real-time tracking algorithm.Therefore,the trajectory curve of the ball could be demonstrated wholly from the beginning of the immerging until the hitting to bottom.In addition,the visual operation interface written in Python was used for acquiring data,adjusting data and presenting results.The improved experimental device had the benefits of the intuitive experimental process,simple operation and accurate measuring data.

关 键 词：落球法 黏度 轨迹实时追踪算法 可视化 

分 类 号：O4-34[理学—物理]