机械示波器的研制与振动合成演示

Development of mechanical oscilloscope and demonstration of harmonic vibration synthesis

传统简谐振动合成演示设备很抽象、不直观,为了清晰地演示其具体的合成过程,研制了结构简单、可清晰显示各振动合成过程的机械示波器.利用电磁振子、电动振子和钢尺自由振动振子实现了不同频率、不同方向的振动,同时使用多面反光转筒得到正弦波,通过控制振子及反光转筒直观地显示各振子单独的振动曲线及其合成的拍现象、李萨如图形.

In view of the abstractness and unintuitive of traditional equipment for simple harmonic vibration synthesis demonstration,to demonstrate its specific synthesis process,a mechanical oscilloscope with simple structure was developed,which could clearly display each vibration synthesis process.Based on electromagnetic oscillator,electric oscillator and steel-ruler free oscillator,this instrument realized different frequency and different direction of vibration,and at the same time,the sine wave was obtained by using multiple reflective cylinder,so that the individual vibration curve of each oscillator and its composite beat phenomenon and Lissajous figures could be intuitively displayed by controlling the oscillator and reflective cylinder.