大学物理 ›› 2012, Vol. 31 ›› Issue (10): 31-31.

• 著者文摘 • 上一篇    下一篇

简易次声振动及监测实验装置设计

黄贞 李栋宇 昊林富 高其中   

  1. 湛江师范学院物理科学与技术学院,广东湛江524048
  • 出版日期:2012-10-25 发布日期:2012-10-20

Compact and simple infrasound vibration and measurement experimental device

  • Online:2012-10-25 Published:2012-10-20

摘要: 本装置利用低频扬声器作为模拟次声振源,并基于光反馈自混合干涉原理,将次声信号转换为自混合干涉信号,利用快速傅里叶变换进行分析,进而得到次声波的频率和强度.实验结果表明,该装置能够准确地测量出次声振动频率,并对其幅度进行监测.装置光路简单,结构紧凑、易实现,可推广应用于次声波检测的实验教学和监测实践.

关键词: :次声振动, 自混合干涉, 傅里叶变换

Abstract: By using low-frequency speaker as a vibration source and optical feedback self-mixing interference effect to convert infrasound vibration into self-mixing interference signal to detect the frequency and intensity, we design a compact and simple infrasound vibration and measurement device for experimental teaching. According to the result testing in the simulation environment of infrasound, this device can measure the infrasound signal correctly.

Key words: infrasound vibration, self-mixing interference, Fourier transform

中图分类号: 

  • O429