WO2017020563A1 - Circuit de balayage de fréquence de haute précision et procédé de balayage de fréquence pour une pièce d'atomisation ultrasonique - Google Patents

Circuit de balayage de fréquence de haute précision et procédé de balayage de fréquence pour une pièce d'atomisation ultrasonique Download PDF

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Publication number
WO2017020563A1
WO2017020563A1 PCT/CN2016/072453 CN2016072453W WO2017020563A1 WO 2017020563 A1 WO2017020563 A1 WO 2017020563A1 CN 2016072453 W CN2016072453 W CN 2016072453W WO 2017020563 A1 WO2017020563 A1 WO 2017020563A1
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WO
WIPO (PCT)
Prior art keywords
frequency
circuit
frequency sweeping
capacitor
atomizing sheet
Prior art date
Application number
PCT/CN2016/072453
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English (en)
Chinese (zh)
Inventor
郑瑶
郭耀波
Original Assignee
深圳市尚进电子科技有限公司
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Application filed by 深圳市尚进电子科技有限公司 filed Critical 深圳市尚进电子科技有限公司
Publication of WO2017020563A1 publication Critical patent/WO2017020563A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F6/12—Air-humidification, e.g. cooling by humidification by forming water dispersions in the air
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/0175—Coupling arrangements; Interface arrangements

Definitions

  • the invention relates to the field of atomizing sheets, in particular to a high-precision frequency sweeping circuit and a frequency sweeping method for an ultrasonic atomizing sheet.
  • Ultrasonic nebulizer utilizes electronic high frequency oscillation (oscillation frequency is 1.7MHz or 2.4MHz Exceeding the human hearing range, the electronic oscillation does not harm the human body and the animal)
  • oscillation frequency is 1.7MHz or 2.4MHz Exceeding the human hearing range, the electronic oscillation does not harm the human body and the animal
  • the liquid water molecular structure is broken up to produce a natural and elegant water mist, and then the mist is blown from the bottom to the outlet through a small fan, so that the air is humid and accompanied by abundant negative oxygen ions, Clean air, improve health and create a comfortable environment.
  • the invention provides a high-precision frequency sweeping circuit and a frequency sweeping method for an ultrasonic atomizing sheet, which can determine the central resonant frequency of the atomizing sheet, thereby determining the driving frequency for driving the atomizing sheet, thereby improving the transducing efficiency of the atomizing sheet and Atomization amount.
  • a high-precision frequency sweeping circuit of an ultrasonic atomizing sheet comprising a boosting circuit and a frequency sweeping circuit, wherein the boosting circuit is electrically connected with the frequency sweeping circuit, and the boosting circuit comprises a fourth capacitor and a diode a second inductor, a second transistor, a first resistor and a second resistor; the fourth capacitor and the diode are both connected in parallel with the DC power source, and the anode pin of the diode is connected to the anode of the DC power source and connected to one end of the second inductor The other end of the second inductor is connected to the drain of the second transistor and the first resistor.
  • the first resistor and the second resistor are connected in series, and the source of the second transistor and the second resistor are connected to the cathode of the DC power source.
  • the frequency sweeping circuit includes a first capacitor, a second capacitor, a third capacitor, a first inductor, a first transistor, and an atomizing sheet; the second capacitor is connected in parallel with the first resistor and the second resistor, and the second capacitor The positive pole is connected to the first inductor, and the other end of the first inductor is connected to the drain of the first triode and the first capacitor; the first capacitor, the atomizing sheet and the third capacitor are connected in series, and the third capacitor is respectively connected with the second capacitor and the second capacitor The source of a triode is connected.
  • the gate of the first transistor is a frequency receiving point whose frequency duty ratio is greater than or equal to 50%.
  • the series connection point of the first resistor and the second resistor is a voltage feedback point, and the voltage feedback point is used to record the change of the voltage value when the frequency is swept, and the voltage feedback point is used to adjust the second triode during normal operation.
  • the input frequency of the gate, the duty cycle of the input frequency is 20%-60%.
  • first triode and the second triode are both N-channel FETs.
  • the invention provides a high-precision frequency sweeping method for an ultrasonic atomizing sheet, which can be frequency-swept according to an ultrasonic atomizing sheet high-precision frequency sweeping circuit, wherein the frequency sweeping process comprises the following steps:
  • step (1) is:
  • step (2) specifically drives the 90KHz frequency input to the gate of the first transistor. Frequency driven duty cycle is greater than or equal to 50%.
  • step (4) may specifically increase the input frequency of the frequency sweep circuit by 1 KHz.
  • FIG. 1 is a circuit diagram of a high-precision frequency sweeping circuit of an ultrasonic atomizing sheet in the prior art
  • FIG. 2 is a flow chart of a high-precision frequency sweeping method of an ultrasonic atomizing sheet in the prior art
  • FIG. 3 is a circuit diagram of a high-precision frequency sweeping circuit of an ultrasonic atomizing sheet according to the present invention
  • FIG. 4 is a flow chart of a method for high-precision frequency sweeping of an ultrasonic atomizing sheet according to the present invention
  • Figure 5 is a graph showing the voltage variation of the voltage feedback point measured by the present invention.
  • W1 in the figure Indicates the ultrasonic atomizing sheet, because the characteristics of the ultrasonic atomizing sheet can be expressed by a capacitor.
  • the ultrasonic atomizing sheet is equivalent to a capacitor at a specific frequency.
  • C1 and C3 are in the circuit.
  • In the case of an AC signal it is equivalent to a resistor.
  • the second is equivalent to 2 in the AC circuit.
  • the resistance can be adjusted by adjusting the size of the atomizer. Input a frequency of 90-130KHz to the gate of the transistor in the circuit, and start at 1KHz from 90KHz For the unit to increment, the circuit works as follows:
  • the Q1 MOS transistor is turned on, the current passes through L1, Q1, and RS1, and at this time, L1 starts to store energy;
  • the figure 2 For the flow chart of the high-precision frequency sweeping method of the ultrasonic atomizing sheet in the prior art, the figure shows a complete working cycle, in which we continuously adjust the PWM
  • the frequency the ultrasonic atomizing sheet has a characteristic that when the atomizing sheet is at the center frequency, it stores the maximum energy, so when we adjust the PWM frequency, it will be at the center point of the atomizing sheet.
  • the voltage is at the highest point.
  • the PWM frequency at the highest point of the FB is the center frequency of the atomizer.
  • the atomizing sheet is then driven at this frequency.
  • the frequency of the maximum point of energy storage of the atomized sheet produced by some manufacturers is not the center frequency of the atomizing sheet, and the deviation is about 2-5KHz. Left and right, therefore, it is necessary to perform frequency compensation for products from different manufacturers, which results in the inability to perform large-scale trial installation, and at the same time, it can only be at 200KHz due to the speed of collecting FB point voltage. Scanning within, it is not possible to perform automatic sweeping of the atomizer at 2MHz frequency.
  • the present invention improves the circuit, as shown in FIG. 3, since the driving voltage of the ultrasonic atomizing sheet needs to reach 60V. Above, the actual supply voltage is generally only 5-12V. If the circuit of the 'DRIVE' part is used directly, it can form a booster circuit, but the driving voltage is far less than 60V. . Therefore, high voltage driving is generally used, so the input voltage of the 'HIDC-VIN' part of the original method is usually about 24V, and this voltage is achieved by the boosting IC; D1 in the figure, L2 and Q2 form a complete DC-DC boost circuit, which only needs to be boosted by the frequency of 100KHz for the 'DC-PWM' port, and R1 and R2.
  • the partial voltage feedback constitutes a feedback circuit that adjusts the 'DC-PWM' by feedback to achieve voltage stability.
  • the booster circuit gets a voltage point of 20V, at this time 'DRIVE 'The circuit part starts to sweep.
  • the power consumption of the 'DRIVE' part of the circuit starts to increase, in order to keep the DC-DC boost stable' DC-PWM 'gradually increase the duty cycle until the maximum duty cycle is 60% (DC-DC boost maximum duty cycle is generally only 60%, see the relevant DC-DC at home and abroad for details)
  • the data of the boost control circuit when the frequency of the atomization chip starts to approach the center frequency, the power of the boost circuit portion has been increased to the maximum, that is, the boost circuit is already in saturation, so when the frequency is closer to the fog
  • ' C2 The voltage of the positive pole of the capacitor begins to decrease, and the voltage signal fed back by 'DC-FB' also begins to decrease until the frequency reaches the center of the
  • the present invention provides a practical and low-cost ultrasonic atomizing sheet high-precision frequency sweeping circuit, including a boosting circuit and a frequency sweeping circuit.
  • the boosting circuit is electrically connected to the frequency sweeping circuit, and the boosting circuit includes a fourth a capacitor, a diode, a second inductor, a second transistor, a first resistor, and a second resistor; the fourth capacitor and the diode are both connected in parallel with the DC power source, and the anode pin of the diode is connected to the anode of the DC power source, and the second inductor
  • One end of the second inductor is connected to the drain of the second transistor and the first resistor, the first resistor and the second resistor are connected in series, and the source of the second transistor and the second resistor are connected to the DC power source.
  • the frequency sweeping circuit includes a first capacitor, a second capacitor, a third capacitor, a first inductor, a first transistor, and an atomizing sheet; the second capacitor is connected in parallel with the first resistor and the second resistor, and the anode of the second capacitor is connected An inductor, the other end of the first inductor is connected to the drain of the first transistor and the first capacitor; the first capacitor, the atomizer and the third capacitor are connected in series, and the third capacitor is respectively connected to the second capacitor and the first three poles
  • the source of the tube is connected.
  • the gate of the first transistor is a frequency receiving point whose frequency duty ratio is greater than or equal to 50% .
  • the series connection point of the first resistor and the second resistor is a voltage feedback point, and the voltage feedback point is used to record the change of the voltage value during the frequency sweep, and the voltage feedback point is used to adjust the gate of the second triode during normal operation.
  • Input frequency, the duty cycle of the input frequency is 20%-60%.
  • the first triode and the second triode are both N-channel FETs.
  • the input voltage is 5V
  • 'DC-PWM The power supplied by the boost circuit is constant when the duty cycle is constant and the frequency is constant. At this time, the power consumption of the 'DRIVE' circuit is higher.
  • the lower the voltage fed back at the DC-FB' is when ' DRIVE 'When the circuit starts to sweep, we constantly monitor the voltage at 'DC-FB'. When the voltage at 'DC-FB' is at the lowest point, the corresponding frequency is the center frequency of the atomizer.
  • an ultrasonic atomizing sheet high-precision frequency sweeping method is based on an ultrasonic atomizing sheet high-precision frequency sweeping circuit for sweeping, and the frequency sweeping process comprises the following steps:
  • step (1) The specificity of step (1) is:
  • step (1) input a fixed frequency to the gate of the second transistor, such as 100KHz, step (1)
  • the fixed duty cycle of the input frequency of the medium boost circuit is 20%-60%.
  • the duty cycle is the ratio of the time that the high level takes up in one cycle, such as the square wave duty cycle is 50% and the duty cycle is 0.5. , indicating that the positive level takes 0.5 cycles.
  • step (2) input a 90KHz frequency drive to the frequency sweep circuit; step (2) specifically inputs 90KHz to the gate of the first transistor Frequency drive, in different embodiments, the input frequency is different, and the specific can be set according to requirements.
  • the frequency driven duty cycle is greater than or equal to 50%.
  • step (4) increasing the input frequency to the frequency sweeping circuit; step (4) specifically increasing the input frequency of the frequency sweeping circuit by 1 KHz; setting the added value as 1KHz, which guarantees accuracy and precision.
  • the ultrasonic atomization sheet used in the above example has a resonance frequency of 115 kHz.
  • the DC input voltage is 5.0 volts.
  • the partial pressure ratio of ' R1 '' R2 ' is 10 : 1
  • the 'DC-PWM' input has a frequency of 100KHz and a duty cycle of 45%.
  • the 'PWM' input frequency is 90KHz and is accumulated in 1KHz with a duty cycle of 50%.
  • the Y axis is the voltage value collected at 'DC-FB' in the chart, the unit is V;
  • the X axis in the graph is the corresponding frequency input to 'PWM'.
  • the invention improves the precision of the frequency sweeping of the ultrasonic atomizing sheet circuit, and can be widely applied to the measurement and driving of various ultrasonic atomizing sheet frequencies; since the highest point measurement based on the pulse signal is not required, the megahertz level can be performed.
  • Ultrasonic atomization film frequency scanning no need to distinguish the different types of atomization film, so it can drive any ultrasonic atomization piece in a real sense.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Computing Systems (AREA)
  • Mathematical Physics (AREA)
  • Dispersion Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Special Spraying Apparatus (AREA)

Abstract

L'invention concerne un circuit de balayage de fréquence de haute précision pour une pièce d'atomisation ultrasonique, qui comprend un circuit amplificateur et un circuit de balayage de fréquence. Le circuit amplificateur est connecté électriquement au circuit de balayage de fréquence. L'invention concerne également un procédé de balayage de fréquence basé sur un circuit de balayage de fréquence, comprenant les étapes consistant : à entrer une tension à courant continu (CC) fixe et une fréquence fixe sur un circuit amplificateur; à entrer un pilotage de fréquence sur le circuit de balayage de fréquence; à enregistrer une valeur de tension d'un point de rétroaction de tension du circuit amplificateur; à entrer de plus une fréquence sur le circuit de balayage de fréquence; et à enregistrer une valeur de tension du point de rétroaction de tension du circuit amplificateur, à déterminer si la fréquence entrée sur le circuit de balayage de fréquence atteint ou non une valeur nominale, si tel est le cas, à arrêter de balayer et d'analyser la valeur de tension enregistrée pour trouver une fréquence centrale d'une pièce d'atomisation, autrement, retourner à l'étape précédente. Le circuit de balayage de fréquence de haute précision pour une pièce d'atomisation ultrasonique est applicable à une mesure de fréquence et à un pilotage de diverses pièces d'atomisation ultrasonique. Une mesure n'a pas besoin d'être effectuée sur la base de pics de signaux d'impulsion, et par conséquent un balayage de fréquence de niveau MHz peut être effectué pour des pièces d'atomisation ultrasonique. Il est inutile d'effectuer une compensation discriminatoire pour différents modèles de pièces d'atomisation, et toute pièce d'atomisation ultrasonique peut être pilotée.
PCT/CN2016/072453 2015-08-06 2016-01-28 Circuit de balayage de fréquence de haute précision et procédé de balayage de fréquence pour une pièce d'atomisation ultrasonique WO2017020563A1 (fr)

Applications Claiming Priority (2)

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CN2015104774932 2015-08-06
CN201510477493.2A CN105049024B (zh) 2015-08-06 2015-08-06 一种超声波雾化片高精度扫频电路和扫频方法

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CN109620990A (zh) * 2018-12-26 2019-04-16 深圳飞安瑞科技股份有限公司 一种恒定喷雾量的超声波香薰装置
CN110299905A (zh) * 2018-03-21 2019-10-01 湖南中烟工业有限责任公司 一种超声雾化片工作控制电路及超声波电子烟
CN112107030A (zh) * 2019-06-04 2020-12-22 湖南中烟工业有限责任公司 一种超声波雾化片振荡控制方法及控制系统

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CN105049024B (zh) * 2015-08-06 2018-12-18 深圳市尚进电子科技有限公司 一种超声波雾化片高精度扫频电路和扫频方法
CN106175029A (zh) * 2016-07-12 2016-12-07 宁波大简智慧科技有限公司 一种喷雾仪震动频率的获取方法
CN109007974A (zh) * 2017-06-08 2018-12-18 湖南中烟工业有限责任公司 一种超声波电子烟电路及该超声波电子烟
CN110612664B (zh) * 2017-07-27 2023-05-09 伟肯有限公司 电机驱动适配
CN108702132A (zh) * 2017-12-12 2018-10-23 深圳和而泰数据资源与云技术有限公司 一种锁频电路及其控制方法
CN108355210A (zh) * 2018-02-27 2018-08-03 华健 一种变频变压的雾化器
WO2019165663A1 (fr) * 2018-02-27 2019-09-06 华健 Atomiseur ayant une fréquence variable et une tension variable
CN108802529A (zh) * 2018-08-23 2018-11-13 西安拓尔微电子有限责任公司 一种雾化器换能片谐振点的快速确定方法
CN111964202A (zh) * 2020-07-14 2020-11-20 海速芯(无锡)科技有限公司 一种加湿器用新型雾化片驱动架构及驱动方法
CN113030604A (zh) * 2020-12-18 2021-06-25 深圳来福士雾化医学有限公司 一种雾化器防干烧识别应用及其电路

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CN110299905A (zh) * 2018-03-21 2019-10-01 湖南中烟工业有限责任公司 一种超声雾化片工作控制电路及超声波电子烟
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CN109620990A (zh) * 2018-12-26 2019-04-16 深圳飞安瑞科技股份有限公司 一种恒定喷雾量的超声波香薰装置
CN109620990B (zh) * 2018-12-26 2024-05-17 深圳飞安瑞科技股份有限公司 一种恒定喷雾量的超声波香薰装置
CN112107030A (zh) * 2019-06-04 2020-12-22 湖南中烟工业有限责任公司 一种超声波雾化片振荡控制方法及控制系统
CN112107030B (zh) * 2019-06-04 2022-02-15 湖南中烟工业有限责任公司 一种超声波雾化片振荡控制方法及控制系统

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