1通过数码相机慢门留迹获得振动图像传统的简谐运动图像演示装置的设计思想是通过使坐标纸匀速移动建立时间轴,并设法在作图纸上留下振子在不同时刻的位置得到振动图像,例如用沙漏、水漏、毛笔、电火花留迹等.这些装置在操作时比较复杂,不够简洁,而且即使得到振动图像后,也不能直接说明图像是正弦函数.为此,我们做了以下改进.图1将一个普通的LED灯安装在竖直运动的弹簧振子上,并在平衡位置固定一个不同颜色的LED灯(如图1),将照相机固定在小车上,并放置在水平导轨上,通过电动机拖动小车,使照相机在轨道上一边做匀速直线运动,一边曝光,调节曝光时间为2s使照相机在停止运动前一刻完成拍摄(如图2),就可以得到弹簧振子位移随时间变化的图像.把图片拷到电脑上后,用PPT软件打开获得的弹簧振子的振动图像,再打开一张标准的正 Vibration image through slow shutter digital camera The traditional harmonic motion image demonstration device was designed by moving the coordinate paper at a constant speed to establish a timeline and trying to get the vibrator at different times by leaving the vibrator on the drawing sheet , Such as hourglass, water leakage, writing brush, EDM, etc. These devices are complicated in operation, not concise enough and can not directly indicate that the image is a sine function even after the vibration image is obtained. For this reason, we made the following Figure 1 An ordinary LED lamp mounted on the vertical movement of the spring oscillator, and the equilibrium position of a different color LED lights (Figure 1), the camera is fixed on the car, and placed on the horizontal rails , Through the motor drag the car so that the camera side of the track to do a uniform linear motion, while exposure, adjust the exposure time of 2s so that the camera to stop shooting immediately before the completion of shooting (Figure 2), you can get the spring oscillator displacement over time After copying the picture to the computer, open the vibration image of the spring vibrator obtained with the PPT software, and then open a standard positive