声悬浮演示仪的研制与优化

Production and Optimization of Acoustic Levitation Demonstrator

通过超声发生器和超声换能器产生的超声波,经反射端反射叠加后可形成稳定驻波,利用驻波节点静止不动、波形不传播的特性即可制作声悬浮实验仪。本文详细介绍了声悬浮实验仪的设计制作过程,以及为提高仪器稳定性和演示效果而进行的改进过程。实验结果表明,在设定功率范围内,采用曲率半径为2 cm的半圆作为反射端,实验效果最好,能悬浮20个颗粒小球。制作的声悬浮实验仪不仅能提供声悬浮现象的直观演示,将抽象复杂的驻波概念直观化、简单化,使学生易于理解驻波特性,激发学习兴趣,而且能为声悬浮的理论研究和实验探究提供指导和借鉴作用。

The ultrasonic generated by the ultrasonic generator and ultrasonic transducer can form stable standing wave after reflection superposition at the reflection end,and the acoustic levitation can be made by utilizing the characteristics of stationary node of standing wave and non-propagation of waveform.It introduces in detail the design and manufacture process of the acoustic levitation and the improvement process for improving the stability and demonstration effect of the instrument.The experimental results show that within the set power range,a semicircle with a radius of curvature of 2 cm is used as the reflection end,which has the best experimental effect and can suspend 20 particles.The apparatus can not only provide an intuitive demonstration of the phenomenon of acoustic levitation,make the abstract and complex concept of standing wave intuitive and simple,so that students can easily understand the standing wave,stimulate learning interest,but also provide guidance and reference for the theoretical research and experimental exploration of acoustic levitation.