基于超声光栅衍射的液体密度测试  

Measurement of liquid density based on ultrasonic diffraction grating

作　　者：王锁明 侯彬[2] 朱二旷[1] 黄海波[1] 

机构地区：[1]燕山大学理学院,河北秦皇岛066004 [2]东北石油大学秦皇岛分校,河北秦皇岛066004

出　　处：《物理实验》2013年第4期41-43,共3页Physics Experimentation

基　　金：国家级大学生创新项目(No.101021627)

摘　　要：采用超声波与光栅衍射的联合实现液体密度的测量.超声波发生器在周期性高频正弦电信号的激励下产生超声波,此超声波在样品池液体中传输可以产生周期性排布的疏密纵波,进而使液体的折射率呈现周期性排列,当激光束垂直入射此液体时,会产生类似光栅的作用.通过CCD采集分析经过样品池后单色出射光线的衍射图样,得出液体的密度.Ultrasonic could be produced by ultrasonic generator stimulated with high frequency sine-wave electrical signal. Dilatational wave was formed when the ultrasonic transmitted in the liquid loaded in sample cell, so the liquid density could be arranged periodically. When the laser beam en- tered into the liquid vertically, it would be diffracted by the liquid because of the alternation of differ- ent refractive index. We could get the value of the liquid density by the data collected on CCD and the analysis of the diffraction patterns.

关 键 词：液体密度 超声波 超声光栅 衍射 CCD 

分 类 号：O426.9[理学—声学]