基于USB摄像头的单摆频闪照相实验系统的设计与开发  

Design and Development of Stroboscopic Photography System of Mono-pendulum Based on USB Camera

作　　者：宋恭渝 蔡晓峰 任志君[1] 许富洋[1] SONG Gongyu;CAI Xiaofeng;REN Zhijun;XU Fuyang(College of Physics and Electronic Information Engineering,Institute of Information Optics,Zhejiang Normal University,Jinhua 321004,China)

机构地区：[1]浙江师范大学物理与电子信息工程学院信息光学研究所,浙江金华321000

出　　处：《大学物理实验》2023年第1期76-80,共5页Physical Experiment of College

基　　金：教育部2021年第二批产学合作协同育人项目(202102569012)。

摘　　要：传统的频闪照相实验通常在暗室中进行,对操作环境有一定要求。本文设计开发了一种基于USB摄像头的单摆频闪实验系统,可以在明亮的教室中使用,便捷高效。用USB摄像头实时拍摄摆球的运动情况,利用帧间差分法确定摆球的相对位置并一键生成频闪照片,显示摆球运动轨迹,摆球的运动周期通过傅里叶变换计算得到。实验结果表明,该系统具有较高的测量精度,配合投影仪使用,演示效果直观明显,可以很好满足实验教学要求。The traditional stroboscopic photography experiments are usually carried out in a dark room with strict environment requirements.It designs and develops a mono-pendulum stroboscopic photography system based on USB camera,which can be used in bright classrooms conveniently and efficiently.The motion of mono-pendulum is captured by USB camera in real time,then the relative position of the ball is acquired by inter-frame difference method and the stroboscopic photograph is generated by one click to display the motion track of the ball,and the period of the ball is calculated by Fourier transform.Experimental results show that the system can meet the requirements of experimental teaching well with high accuracy and intuitive demonstration.

关 键 词：USB摄像头 帧间差分法 频闪 单摆 

分 类 号：O4-39[理学—物理]