摘要
设计了一种新型的驻波实验装置,该装置采用振动频率可随外加交流电压频率变化的振动子作为振源,再利用单片机及功率驱动电路产生各种所需的不同频率的电压,来控制振源的振动频率.用它可以验证传统的驻波实验装置不能验证的驻波频率f与驻波波长λ之间的关系.
We design a new type of standing wave experimental device.Its vibration source is made by an oscillator,whose vibration frequency can be applied with the AC voltage frequency varies.Microcontroller and drive circuitry is required to generate a variety of different frequency voltage,so the frequency of the vibration source can be controlled.We can verify the relationship between the wavelength λ and the frequency f of the standing wave,however,which can not be verified in the traditional experimental device.
出处
《大学物理》
北大核心
2010年第9期36-39,共4页
College Physics
关键词
振源
斩波器
驻波
频率
初值
vibration source
chopper
standing wave
frequency
initial value
