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在物理教学过程中通常采用砂摆装置演示简谐运动原理及其图像成形过程,但砂摆装置在演示过程中随着砂摆中细沙的不断减少,直接影响砂摆的摆幅,同时由于纸张匀速运动难以控制,形成的图像不规范,实验效果较差。现在介绍一种新型简谐运动描迹装置,电磁铁单摆摆动之间先接通内部电源,同时启动电机带动滚筒旋转使实验盒匀速向前移动,单摆摆动时磁力吸引实验盒内的细铁砂,细铁砂被粘附到带粘性透明纸上,细铁砂上显示出清晰的实验图像,实验效果生动直观、图像成形更有规范,有助于学生弄清楚简谐运动的规律,提高学习的兴趣。
In the process of physics teaching, the principle of simple harmonic motion and its image forming process are usually demonstrated by the sand pendulum device. However, with the continuous reduction of fine sand in the pendulum pendulum device during the demonstration process, the pendulum amplitude of the sand pendulum is directly affected. At the same time, Paper is difficult to control the uniform motion, the formation of the image is not standardized, the experimental effect is poor. Now introduce a new type of harmonic motion tracing device, electromagnet swing pendulum between the first access to the internal power supply, while starting the motor to drive the drum rotation so that the experiment box moving at a uniform speed, pendulum swing magnetic force to attract the experimental box fine The iron sand and the fine iron sand are adhered to the sticky transparent paper, and the clear experimental images are displayed on the fine iron sand. The experimental results are vivid and intuitive, and the image forming is more standardized, which helps students to understand the law of simple harmonic motion and enhance the learning interest.