【摘要】 演示实验是中学生学习物理的入门向导,是一种最有效、最直观的教学手段。合适的教学用具,在教学中起到十分重要的作用。它可以化抽象为具体,化枯燥为形象。学生身临其境,眼见为实,激发学习兴趣,从而提高教学质量。教学演示仪根据中学物理教学培养目标和教学具体内容制作,易于探究引入角速度的概念和意义,能够定性说明什么是角速度、线速度,便于学生理解,适于教师演示和学生自主定量探究线速度、角速度与圆周运动半径三者之间的关系。详细介绍了圆周运动教学演示仪的设计原理、实验装置及其使用方法。演示仪基于单片机外部控制方式设计制作,通过PWM控制电机的旋转速度和时间,电机转动带动指针,转动的角度作为周长,数码管实时显示转动时间,根据时间计算出角速度。更多还原

【Abstract】 Demonstration experiment is the introductory guide of high school students study physics,is one of the most effective and most intuitive teaching means.A suitable teaching instrument,played a very important role in teaching.It can turn abstract into concrete,boring to image,the student,seeing is believing,stimulate interest in learning,to improve the teaching quality.This teaching demonstration instrument based on training target and teaching high school physics teaching the specific content production,easy to explore the concepts of angular velocity and the significance,can qualitatively explain what is the angular velocity and linear velocity,easy to understand by the students and suitable for the demonstration of the teachers and students independent quantitative explore linear velocity,angular velocity and the relations between and among radius of circular motion.Circular motion teaching demonstration instrument are introduced in detail in this paper the design principle,experimental device and method of use.Demonstration instrument based on single chip microcomputer external control mode design and production,and rotation speed and time of the motor by PWM control,motor rotation drive pointer,the angle of the rotation as a radian,LED display real-time rotation time, according to the time to calculate the angular velocity.更多还原