自動調頻的超音波霧化器激振電路研發

Development of Frequency Tracking Power Supply for Ultrasonic Horn Atomizer

陳楷中(Kai-Jhong Chen)

指導教授 ： 周元昉

國立臺灣大學/工學院/機械工程學研究所/碩士(2015年)

https://doi.org/10.6342/NTU.2015.01980

摘要

壓電致動器的特性會隨著製程或是環境因素而有所改變，使得其共振頻率產生飄移的現象，當操作頻率與共振頻率不同時，壓電致動器無法到達最佳的操作效率。本研究開發一個超音波致動器驅動電路模組，藉由鎖相迴路達到追蹤共振頻率的目的，使得超音波霧化器能自動追蹤共振頻率，維持在最佳的工作狀態。經過霧化甘油水溶液的實驗，證明使用本論文所設計的驅動電路可以增加霧化流量，以及擴大可霧化甘油溶液的濃度範圍。

關鍵字

超音波霧化器 ； 鎖相迴路 ； 超音波驅動電路 ； 共振頻率飄移 ； 自動頻率追蹤

並列摘要

Property of the piezoelectric transducer may change due to process and environment, resonating frequency of the piezoelectric transducer also varies. When the operating frequency is not equal to the resonance frequency, the piezoelectric transducer can`t reach maximum efficiency. The purpose of this paper is to design an ultrasonic transducer driving circuit module, tracking the resonant frequency by using a phase locked loop, so that the ultrasonic atomizer can automatically track the resonance frequency and maintain the maximum efficiency. Through experiment of atomizing glycerol solution, confirm that use the drive circuit of the present paper can increase the atomizing flow, and expand the range of the concentration of the glycerol solution which can be atomized.

並列關鍵字

ultrasonic atomizer ； phase locked loop ； ultrasonic transducer driving circuit ； variation of resonating frequency ； frequency tracking

參考文獻

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