Micronl nano thermoacoustic vibration excitor based on thermoacoustic conversion

Abstract

The present invention relates to micron / nanometer thermoacoustic vibration exciter based on thermoacoustic conversion and serving as a micron / nanometer thermoacoustic engine. The micron / nanometer thermoacoustic vibration exciter includes one nanotube with one closed end, vibration film in the other end and fluid work medium filled inside; and one heater outside the nanotube for heating the nanotube. The nanotube may have a porous laminated plate structure filled and a nanometer magnetic metal particle layer adhered to the wall. The heater may be a laser, an electrode plate or a nanometer electric heating wire with built-in power source. When the heater heats the nanotube, mutual thermoacoustic power conversion is induced inside the nanotube so as to output high frequency signal of different frequencies and amplitudes through the vibration film. The present invention has compact structure, simple operation, high responding frequency, low cost and other features and important application in nanometer measurement field.

Description

technical field [0001] The invention belongs to the field of nano vibrators and nano machines, in particular to a micro / nano thermoacoustic exciter based on thermoacoustic conversion based on local heating of nanotubes so that the airflow encapsulated in the tubes generates thermoacoustic oscillations. Membrane can output GH Z -MH Z range of ultra-high frequency excitation force. Background technique [0002] In recent years, due to the great value of nano-oscillator technology in perceiving the nano-world, a lot of effort has been invested in related research at home and abroad, which shows a frontier technology field with great development prospects. It has gradually become clear that attaching atoms or molecules to nanoscale oscillators such as carbon / nanotubes or silicon cantilevers can lead to significant changes in their vibrational frequency. If the frequency is monitored, the extremely rich mechanical, electrical, magnetic and thermal information in the nanometer ...

AI Technical Summary

Problems solved by technology

However, all existing thermoacoustic devices are based on the macroscopic concept, that is, their overall size is at least on the order of centimeters. The research work has not been carried out, the reason is not difficult to understand, from the traditional concept, under this size, the thermoacoustic engine will have no practical value

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