A high-precision frequency-sweeping circuit and method for ultrasonic atomizing sheets
A technology of sweeping frequency circuit and atomizing sheet, which is applied in the field of atomizing sheet, can solve the problems of small amount of atomization, different central resonant frequency of ultrasonic atomizing sheet, low energy conversion efficiency of atomizing sheet, etc., and achieve the effect of improving precision
Active Publication Date: 2018-12-18
SHENZHEN SHANGJIN ELECTRONICS TECH CO LTD
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Problems solved by technology
[0003] Due to the unevenness of the existing manufacturing technology, different manufacturers and batches of ultrasonic atomizing sheets currently have different center resonance frequencies in the market. If the driving frequency is not its center resonance frequency when driving it, it will cause atomization. The energy conversion efficiency of the sheet is low and the amount of atomization is extremely small
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[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0031] Such as figure 1 As shown, W1 in the figure represents the ultrasonic atomizing sheet, because the characteristics of the ultrasonic atomizing sheet can be expressed by capacitance, and the ultrasonic atomizing sheet is equivalent to a capacitor at a specific frequency. C1 and C3 in the figure are in the PWM circuit. In the case of an AC signal, it is equivalent to a resistor. There are two functions in this circuit. One is to prevent the DC voltage from bei...
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A high-precision frequency sweeping circuit for an ultrasonic atomization piece comprises a booster circuit and a frequency sweeping circuit. The booster circuit is electrically connected to the frequency sweeping circuit. Also provided is a frequency sweeping method based on a frequency sweeping circuit, comprising: inputting a fixed DC voltage and a fixed frequency to a booster circuit; inputting a frequency drive to the frequency sweeping circuit; recording a voltage value of a voltage feedback point of the booster circuit; additionally inputting a frequency to the frequency sweeping circuit; and recording a voltage value of the voltage feedback point of the booster circuit, determining whether the frequency input to the frequency sweeping circuit reaches a rated value, if so, stopping scanning and analyzing the recorded voltage value to find a central frequency of an atomization piece, otherwise, returning to the previous step. The high-precision frequency sweeping circuit for an ultrasonic atomization piece is applicable to frequency measurement and drive of various ultrasonic atomization pieces. Measurement does not need to be carried out on the basis of peaks of pulse signals, and therefore MHz-level frequency scanning can be performed for ultrasonic atomization pieces. It is unnecessary to perform discriminative compensation for different models of atomization pieces, and any ultrasonic atomization piece can be driven.
Description
technical field [0001] The invention relates to the field of atomizing sheets, in particular to a high-precision frequency sweep circuit and a frequency sweeping method for an ultrasonic atomizing sheet. Background technique [0002] The ultrasonic nebulizer uses electronic high-frequency oscillation (the oscillation frequency is 1.7MHz or 2.4MHz, which is beyond the range of human hearing, and the electronic oscillation is absolutely harmless to the human body and animals). Through the high-frequency resonance of the ceramic atomizer, the liquid water The molecular structure is broken up to produce natural and elegant water mist, and then the mist is blown from the bottom to the outlet through a small fan, making the air moist and accompanied by abundant negative oxygen ions, which can freshen the air, improve health, and create a comfortable environment. [0003] Due to the unevenness of the existing manufacturing technology, different manufacturers and batches of ultrason...
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IPC IPC(8): H03K19/0175F24F6/12
CPCF24F6/12H02M3/02H02M3/155H03K19/0175
Inventor 郑瑶郭耀波
Owner SHENZHEN SHANGJIN ELECTRONICS TECH CO LTD