摘要
本文探讨了一种利用纹影法观察声光介质内部超声波及测量其声速的方法,利用该方法可以直接观察到声光介质内部的超声波图像.在一定条件下,可以观察到晶体内部的折射率周期性分布图像,进而计算得到超声波在晶体内的传播速度.该方法为声光介质内部的声速测量提供了一个新的思路,并且有助于对超声波的传播有一个更形象的了解.
A new method of ultrasonic wave velocity measuring by the Schlieren system is discussed. It is convenient to observe the ultrasonic wave spreading in the acoustic-optic medium. Meanwhile,an image of the periodicdistribution of the refractive index can be shown on the observation screen under some circumstance,which can beused to calculate the ultrasonic wave velocity in the medium. This new method of velocity measuring helps to have avivid understanding of the spreading of ultrasonic wave in the acoustic-optic medium.
作者
胡斌
夏珣
熊畅
张博一
唐芳
李朝荣
HU Bin;XIA Xun;XIONG Chang;ZHANG Bo-yi;TANG Fang;LI Chao-rong(School of Electronic Information Engineering,Beihang University,Beijing 100191,China;Shenyuan Honors College of Beihang University,Beijing 100191,China;School of Physics and Nuclear Energy Engineering,Beihang University,Beijing 100191,China;School of Automation Science and Electrical Engineering,Beihang University,Beijing 100191,China)
出处
《大学物理》
2018年第2期64-67,74,共5页
College Physics
基金
北京航空航天大学重大教改基金项目资助
关键词
纹影法
声光衍射
超声波声速测量
Schlieren method
acoustic-optic diffraction
ultrasonic wave velocity measuring
