基于多普勒效应的水波特性实验装置的设计

Design of an experimental apparatus for water wave haracteristics based on Doppler effect

设计了一种基于多普勒效应的水波特性实验装置,在频闪光源照射下,通过毛玻璃屏,可直接观察多普勒效应的现象,通过设计的光电检测装置测量出水波的频率及频率的变化情况,实现水波多普勒频移的数字化测量.当波源位置固定,波源以一定频率振动,根据多普勒效应,通过实时测量多普勒频率,测量出探头的速度,进而推算出水波波速.该装置有利于多普勒效应的水波特性研究,直观演示了多普勒频移现象.

A Doppler effect based on experimental apparatus for water wave characteristics is introduced. Under the irradiation of a stroboscopic light source, the Doppler effect of this kind could be observed via a hair glass screen by using this apparatus. By a designed photoelectric detection device, the frequency of wave and its change could be measured thus to realize the digital measurement of wave＇ s Doppler shift. When the wave source＇ s position is fixed, and it＇ s vibrating at a given frequency, according to Doppler low, by measuring the Doppler frequency at real-time, the detector＇ s speed could be measured thus the wave speed could be calculated. This apparatus provides a direct way of demonstrating Doppler shift thus good for the study of Doppler effect＇ s wave characteristics.