利用多普勒效应测量液体流速的研究  

Research on Measuring Liquid Velocity by Doppler Effect

作　　者：李文清 郭松青[1] 张小娟 霍运通 张瑞琳 徐雅菁 夏嘉一 张永恒 LI Wenqing;GUO Songqing;ZHANG Xiaojuan;HUO Yuntong;ZHANG Ruilin;XU Yajing;XIA Jiayi;ZHANG Yongheng(College of Science,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学理学院,天津300300

出　　处：《大学物理实验》2023年第4期37-40,共4页Physical Experiment of College

基　　金：中国民航大学校级教育教学改革与研究项目(CAUC-2022-C2-031)。

摘　　要：研究了利用多普勒效应进行液体流速的测量。将超声光栅测超声波的原理和多普勒效应巧妙结合,由于超声波在恒定流动液体中传播时入射波和反射波的频率不同,因而测得上述状态下两个频率的差值即可得液体的流速。这为液体流速的测量提供了新的思路和方法,丰富了普通物理实验教学内容,增加了实验创新方案,在启发实验创新设计思维等方面具有借鉴意义。The experiment studies a method of measuring liquid velocity by Doppler effect in this text.This method is an ingenious combination of the principle of the measurement of ultrasonic waves by ultrasonic gratings and the Doppler effect.The liquid velocity can be measured by the frequency differential between the incident wave and the reflected wave generated by ultrasonic waves propagating in a constant fluid environment.It provides a new idea and method for the measurement of liquid velocity,which will enrich experimental teaching content and increase experimental innovation scheme,and which can be used for enlightening the innovative design thinking of experiment.

关 键 词：多普勒效应 超声光栅 液体流速 

分 类 号：O4-33[理学—物理]