利用数字示波器演示简谐振动的叠加

Demonstration of Superposition of Harmonic Vibration by Digital Oscilloscope

用时间的单一谐和函数,即一个余弦或者正弦函数描述的简谐振动,是物理学中最简单、最基本的振动。利用数字任意波信号发生器和数字示波器,分别演示了同方向同频率、相互垂直的同频率以及同方向不同频率的两个简谐振动的合成。在教学过程中通过上述直观演示,有助于学生对简谐振动中振幅、周期、频率以及相位等基本概念的认识,同时对振动的叠加也有更深入的理解。

Harmonic vibration is the most simple and the most basic vibration in physics.In this paper , two har-monic vibration signals generated by the digital signal generator are composited in parallel and perpendicular direction respectively and are demonstrated by digital osci lloscope.In the teaching process , through the visual presentation,the students＇ understanding of basic concepts of harmonic vibration ,such as amplitude, period, frequency and phase,is improved.At the same time the students get a deeper understanding of the superposition of vibration.