CN105772312A - Ultrasonic aromatization sheet frequency sweep circuit and method - Google Patents
Ultrasonic aromatization sheet frequency sweep circuit and method Download PDFInfo
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- CN105772312A CN105772312A CN201610292796.1A CN201610292796A CN105772312A CN 105772312 A CN105772312 A CN 105772312A CN 201610292796 A CN201610292796 A CN 201610292796A CN 105772312 A CN105772312 A CN 105772312A
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- circuit
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- ultrasonic atomization
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- atomization sheet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
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Abstract
The invention discloses an ultrasonic aromatization sheet frequency sweep circuit and a method. The ultrasonic aromatization sheet frequency sweep circuit comprises an input module, wherein the output end of the input module is connected with a bleeder circuit; the bleeder circuit is connected with a filter circuit; voltage division detection terminals are arranged at the two ends of the bleeder circuit respectively; the filter circuit is connected with a coupling circuit; the input end of the coupling circuit is also provided with a switch signal input circuit; the output end of the coupling circuit is provided with an output filter circuit; and the output filter circuit is connected with an output module. According to the ultrasonic aromatization sheet frequency sweep circuit, the circuit is simple, and the cost is lowered; as the voltage of the circuit does not need to raise, the efficiency is improved; and through the coupling circuit, the range of input voltage can become wider.
Description
Technical field
The present invention relates to atomizing piece technical field, particularly relate to a kind of ultrasonic atomization sheet frequency sweep circuit and method.
Background technology
Ultrasonic atomization sheet is to be made up of piezoelectric crystal material and sheet metal, what utilize is the piezoelectric effect of crystalline material, applying level at crystalline material 2 end can make crystalline material produce deformation, the excursion of deformation is minimum, therefore the concussion of the physics of extremely high frequency can be produced, shown in the operation principle below figure 1 of piezoelectric crystal material and Fig. 2.Fig. 1 is that direct piezoelectric effect external force makes crystal produce electric charge, and Fig. 2 is that inverse piezoelectric effect extra electric field makes crystal produce deformation.On any one electrode paste in upper figure, namely piece of metal thin slice may make up a ultrasonic atomization sheet, the above principle for ultrasonic atomization sheet.
Ultrasonic atomization sheet presents following characteristics on electrology characteristic:
(1) capacitance characteristic, uses apparatus measures to have electric capacity to exist between 2 electrodes of atomizing piece, and therefore unidirectional current cannot pass through ultrasonic atomization sheet.
(2), there is induction reactance between 2 electrodes of atomizing piece in inductance characteristic, the existence with inductance can hinder the alternating current within the scope of certain frequency to pass through.
The equivalent circuit diagram of ultrasonic atomization sheet is the electric capacity C and inductance L of series connection, and its frequency feature is:
(1) electric capacity C series connection in circuit therefore atomizing piece 2 end only have alternating current to pass through；
(2) power frequency of atomizing piece 2 end get over the capacitive reactance of high capacitance C can be more and more less；
(3) induction reactance of the more low inductance L of the power frequency of atomizing piece 2 end can be more and more less.
Specifically as shown in Figure 3, in figure, atomizing piece mid frequency is the intersection of 2 curves, because the electric capacity in equivalent circuit and inductance are series connection, so can because the capacitive reactance of the induction reactance of inductance or electric capacity increases when the situation lower frequency deviation intersection that voltage is constant time, causing the current reduction flowing through atomizing piece, after electric current drops to certain threshold value, the energy that obtains of atomizing piece is just not enough to produce atomizing effect.Note: above chart is only used as demonstration use, do not represent actual test data.
Flow through the electric current of ultrasonic atomization sheet and the relation of frequency:
(1) atomizing piece can be made to shake as long as alternating current flows through atomizing piece；
(2) when voltage is constant only the frequency of alternating current closest to atomizing piece central point time flow through the electric current of atomizing piece and be only maximum, the energy that atomizing piece obtains just is enough to produce atomizing effect；
(3) according to conclusion (1) as long as when power frequency does not improve the energy generation water smoke that the voltage of electrode can also make atomizing piece acquisition enough when the central point of atomizing piece, but can because the increase of the induction reactance of atomizing piece or capacitive reactance causes that atomizing piece own loss increases, so that efficiency sharply declines, and atomizing piece can seriously generate heat or burn；
(4) can pass through to change the frequency of alternating current when voltage is constant, the size measuring alternating current determines the mid frequency of atomizing piece.
Analysis and publication number according to atomizing piece characteristic are the Chinese invention patent of CN105049024A, its disclosed a kind of ultrasonic atomization sheet high accuracy frequency sweep circuit and frequency sweeping method, still suffer from some shortcomings part: circuit is more complicated, cost is a bit higher, whole efficiency is on the low side, it is impossible to adapt to less power voltage supply.
Summary of the invention
The present invention proposes a kind of ultrasonic atomization sheet frequency sweep circuit and method, solves circuit in prior art more complicated, and cost is a bit higher, whole efficiency is on the low side, it is impossible to adapt to less power voltage supply problem.
The technical scheme is that and be achieved in that:
A kind of ultrasonic atomization sheet frequency sweep circuit, including input module, the outfan of input module is connected to bleeder circuit, bleeder circuit is connected to filter circuit, the two ends of bleeder circuit are provided with dividing potential drop detection terminal, and filter circuit is connected to coupling circuit, and the input of coupling circuit is additionally provided with switching signal input circuit, the outfan of coupling circuit is provided with output filter circuit, and output filter circuit connects output module.
Further, input filter capacitor it is provided with between input module and bleeder circuit.
Further, it is provided with isolation circuit between coupling circuit and output filter circuit.
Further, input module includes positive input terminal and negative input terminal, and bleeder circuit is divider resistance, and divider resistance is connected with positive input terminal or negative input terminal.
Further, coupling circuit is transformator or three foot I-shaped inductance.
Further, switching signal input circuit is that the input of audion or controllable silicon or MOSFET, audion or controllable silicon or MOSFET is provided with pwm signal input.
A kind of ultrasonic atomization sheet frequency sweeping method, can carry out frequency sweep according to above-mentioned a kind of ultrasonic atomization sheet frequency sweep circuit, and frequency sweep process comprises the following steps:
(1) switching signal input circuit drives according to original frequency incoming frequency；
(2) measure and record the pressure reduction between dividing potential drop detection terminal；
(3) incoming frequency of switching signal input circuit is changed, it may be judged whether reach the cut-off frequency set, if it is not, then repeat step (2), if so, then enter next step；
(4) determine the maximum differential pressure between dividing potential drop detection terminal, the incoming frequency of the switching signal input circuit of its correspondence is designated as the mid frequency of atomizing piece.
Further, step (2) is
(2) measure and record the pressure reduction between dividing potential drop detection terminal or measurement and record flows through the electric current of divider resistance；
(3) incoming frequency of switching signal input circuit is changed, it may be judged whether reach the cut-off frequency set, if it is not, then repeat step (2), if so, then enter next step；
(4) determine that the maximum differential pressure between dividing potential drop detection terminal or selection flow through the maximum current of divider resistance, the incoming frequency of the switching signal input circuit of its correspondence is designated as the mid frequency of atomizing piece.
Further, further comprising the steps of:
(5) operating current when monitoring atomizing piece works with mid frequency, if the difference between current of operating current and maximum current is 30%-50%, then judges that atomizing piece is in hydropenia duty.
Further, further comprising the steps of:
(6) switching signal input circuit stops input.
The beneficial effects of the present invention is: circuit is simple, reduces cost, owing to circuit is made without boosting, efficiency is improved, logical overcoupled circuits, it is possible to the scope making input voltage is more wide in range.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the fundamental diagram of atomizing piece direct piezoelectric effect；
Fig. 2 is the fundamental diagram of atomizing piece inverse piezoelectric effect；
Fig. 3 is the frequency-circuit variation curve chart of atomizing piece；
Fig. 4 is the circuit theory diagrams of the present invention a kind of ultrasonic atomization sheet frequency sweep circuit embodiment one；
Fig. 5 is the circuit theory diagrams of the present invention a kind of ultrasonic atomization sheet frequency sweep circuit embodiment two；
Fig. 6 is the flow chart of a kind of ultrasonic atomization sheet frequency sweeping method of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
As shown in Figure 4, the present invention proposes a kind of ultrasonic atomization sheet frequency sweep circuit, including input module, the outfan of input module is connected to bleeder circuit, and bleeder circuit is connected to filter circuit, and the two ends of bleeder circuit are provided with dividing potential drop detection terminal, filter circuit is connected to coupling circuit, the input of coupling circuit is additionally provided with switching signal input circuit, and the outfan of coupling circuit is provided with output filter circuit, and output filter circuit connects output module.Input filter capacitor it is provided with between input module and bleeder circuit.It is provided with isolation circuit between coupling circuit and output filter circuit.Input module includes positive input terminal and negative input terminal, and bleeder circuit is divider resistance, and divider resistance is connected with positive input terminal or negative input terminal.Coupling circuit is transformator or three foot I-shaped inductance.The input that switching signal input circuit is audion or controllable silicon or MOSFET, audion or controllable silicon or MOSFET is provided with pwm signal input.
Specifically, each components and parts in Fig. 4 title and effect as follows:
This point of VDD is the positive pole of input power
This point of VSS is the negative pole of input power
This point of OUT+ connects one of them electrode of ultrasonic atomization sheet
This point of OUT-connects the another one electrode of ultrasonic atomization sheet
This electric capacity of C1 is circuit input filter capacitor, in practical application according to power supply electric power thus supplied can select different capacity or without
This electric capacity of C2 is circuit filtering electric capacity, and in practical application, the difference according to power supply electric power thus supplied determines different capacity and pressure, and this electric capacity is that circuit is necessary
This electric capacity of C3 play the effect of isolated DC, the capacity of electric capacity and voltage according to practical situation select, this electric capacity can select in certain applications without
This electric capacity of C4 plays the effect of filtering in circuit can significantly reduce high-frequency ac current interference to external world, simultaneously works as the effect preventing open circuit when atomizing piece is not connected with, and its capacity and voltage select according to practical situation
These components and parts of Q1 are NPN type components and parts, can use the switching components such as audion, controllable silicon or MOSFET in practical application, and it act as main switching tube
These components and parts of RS are divider resistance components and parts, it plays the effect of dividing potential drop in circuit, the electric current of primary lateral coil is flowed through by the dividing potential drop measurement of these components and parts, the parameter of this resistance can regulate the size of resistance according to no application, this resistance can also be serially connected in the VSS position of circuit simultaneously, but Q1 can be caused to produce floating ground owing to resistance being serially connected in VSS position, therefore not recommend this connection, but this connection is also a kind of deformation of circuit；The method of the branch pressure voltage measuring RS resistance 2 end has multiple, for instance differential amplifier circuit can be adopted to measure after being amplified by signal, or adopt special current measurement amplification chip measurement etc., not enumerate here.
These components and parts of T1 are a typical transformator, flow through alternating current by the coil between primary side 1-2 pin and make generation couple current between primary side 3-4 pin, the height of primary side output voltage can be changed by changing the turn ratio of coil between primary side and primary side
This position of V1 is that dividing potential drop measures point 1
This position of V2 is that dividing potential drop measures point 2
This position input switch signal of PWM
The PWM position of above circuit breaker in middle pipe inputs the switching signal close to atomizing piece mid frequency, the primary side of transformator flows through electric current, the primary side of transformator has couple current and flows through, this electric current flows through atomizing piece makes atomizing piece produce concussion, then pressure reduction can be produced at 2 ends of resistance owing to electric current flows through sampling resistor RS, by measuring the pressure reduction of sampling resistor 2 end it is known that flow through the size of current of transformer coil primary side, simultaneously because the coupling of transformator is simultaneously it will also be appreciated that the size of current that flows through of transformer coil primary side.
Occur as it is shown in figure 5, the present invention above circuit in actual applications has multiple deformation, for instance adopting three foot I-shaped inductance to carry out the method coupled, employ 3 foot I-shaped inductance in this application and instead of transformator, its principle and transformator are as good as.
As shown in Figure 6, the invention allows for a kind of ultrasonic atomization sheet frequency sweeping method, can carry out frequency sweep according to above-mentioned a kind of ultrasonic atomization sheet frequency sweep circuit, frequency sweep process comprises the following steps:
(1) switching signal input circuit drives according to original frequency incoming frequency；
(2) measure and record the pressure reduction between dividing potential drop detection terminal；
(3) incoming frequency of switching signal input circuit is changed, it may be judged whether reach the cut-off frequency set, if it is not, then repeat step (2), if so, then enter next step；
(4) determine the maximum differential pressure between dividing potential drop detection terminal, the incoming frequency of the switching signal input circuit of its correspondence is designated as the mid frequency of atomizing piece.
Further, step (2) is
(2) measure and record the pressure reduction between dividing potential drop detection terminal or measurement and record flows through the electric current of divider resistance；
(3) incoming frequency of switching signal input circuit is changed, it may be judged whether reach the cut-off frequency set, if it is not, then repeat step (2), if so, then enter next step；
(4) determine that the maximum differential pressure between dividing potential drop detection terminal or selection flow through the maximum current of divider resistance, the incoming frequency of the switching signal input circuit of its correspondence is designated as the mid frequency of atomizing piece.
Further, further comprising the steps of:
(5) operating current when monitoring atomizing piece works with mid frequency, if the difference between current of operating current and maximum current is 30%-50%, then judges that atomizing piece is in hydropenia duty.
Further, further comprising the steps of:
(6) switching signal input circuit stops input.
nullWhen the mid frequency of atomizing piece is 110Khz，Choose the 100Khz initial frequency as frequency sweep，120Khz is as the end frequency of frequency sweep，Or when the mid frequency of atomizing piece is 1.7Mhz，Choose the 1.6Mhz initial frequency as frequency sweep，1.8Mhz is as the end frequency of frequency sweep，Then start to progressively increase from initial frequency，Such as increase 1Khz or 0.01Mhz，Increase by one grade of frequency every time and all can measure and record sampling resistor dividing potential drop data，Namely measure the size of also record current，Just all current data that recorded are contrasted when frequency increases end frequency time，The incoming frequency that the maximum current point that wherein screens is corresponding is exactly the mid frequency of ultrasonic atomization sheet，Or the mid frequency closest to ultrasonic atomization sheet.
Additionally, find when above circuit is tested: when atomizing piece atomizing piece its operating current when contacting water and being not in contact with water when working with mid frequency differs greatly, the difference between current of nearly 30% to 50% from, therefore according to this characteristic, hydropenia can be judged whether by the size of monitor in real time electric current when normal operation, if such as curent change exceedes certain threshold value namely it is believed that atomizing piece is in hydropenia duty at work, just the input of pwm signal can be stopped, realization has water namely to work, and anhydrous namely stops.
This frequency sweeping method contrasts with frequency sweeping method before following advantage:
(1) circuit reduction cost obtains further reduction；
(2) input voltage range is more wide in range, has only to when input voltage difference change coil primary and secondary turn ratio；
(3) it is greatly improved relative to 2 grades of booster circuit efficiency before owing to circuit is made without boosting, overall power have dropped 30%, and almost without power consumption in the idle situation of circuit, it is best suitable for needing mobile series products standby for a long time to apply；
(4) when frequency sweep, the stability of circuit is higher, and the precision of frequency sweep can improve further.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. a ultrasonic atomization sheet frequency sweep circuit, it is characterized in that: include input module, the outfan of described input module is connected to bleeder circuit, described bleeder circuit is connected to filter circuit, the two ends of described bleeder circuit are provided with dividing potential drop detection terminal, and described filter circuit is connected to coupling circuit, and the input of described coupling circuit is additionally provided with switching signal input circuit, the outfan of described coupling circuit is provided with output filter circuit, and described output filter circuit connects output module.
2. a kind of ultrasonic atomization sheet frequency sweep circuit according to claim 1, it is characterised in that: it is provided with input filter capacitor between described input module and described bleeder circuit.
3. a kind of ultrasonic atomization sheet frequency sweep circuit according to claim 1, it is characterised in that: it is provided with isolation circuit between described coupling circuit and described output filter circuit.
4. a kind of ultrasonic atomization sheet frequency sweep circuit according to claim 2, it is characterized in that: described input module includes positive input terminal and negative input terminal, described bleeder circuit is divider resistance, and described divider resistance is connected with described positive input terminal or negative input terminal.
5. a kind of ultrasonic atomization sheet frequency sweep circuit according to claim 4, it is characterised in that: described coupling circuit is transformator or three foot I-shaped inductance.
6. a kind of ultrasonic atomization sheet frequency sweep circuit according to claim 5, it is characterised in that: described switching signal input circuit is audion or controllable silicon or MOSFET, and the input of described audion or controllable silicon or MOSFET is provided with pwm signal input.
7. a ultrasonic atomization sheet frequency sweeping method, can carry out frequency sweep by a kind of ultrasonic atomization sheet frequency sweep circuit according to claim 6, it is characterised in that: frequency sweep process comprises the following steps:
(1) switching signal input circuit drives according to original frequency incoming frequency；
(2) measure and record the pressure reduction between dividing potential drop detection terminal；
(3) incoming frequency of switching signal input circuit is changed, it may be judged whether reach the cut-off frequency set, if it is not, then repeat step (2), if so, then enter next step；
(4) determine the maximum differential pressure between dividing potential drop detection terminal, the incoming frequency of the switching signal input circuit of its correspondence is designated as the mid frequency of atomizing piece.
8. a kind of ultrasonic atomization sheet frequency sweeping method according to claim 7, it is characterised in that: step (2) is
(2) measure and record the pressure reduction between dividing potential drop detection terminal or measurement and record flows through the electric current of divider resistance；
(3) incoming frequency of switching signal input circuit is changed, it may be judged whether reach the cut-off frequency set, if it is not, then repeat step (2), if so, then enter next step；
(4) determine that the maximum differential pressure between dividing potential drop detection terminal or selection flow through the maximum current of divider resistance, the incoming frequency of the switching signal input circuit of its correspondence is designated as the mid frequency of atomizing piece.
9. a kind of ultrasonic atomization sheet frequency sweeping method according to claim 8, it is characterised in that: further comprising the steps of:
(5) operating current when monitoring atomizing piece works with mid frequency, if the difference between current of operating current and maximum current is 30%-50%, then judges that atomizing piece is in hydropenia duty.
10. a kind of ultrasonic atomization sheet frequency sweeping method according to claim 9, it is characterised in that: further comprising the steps of:
(6) switching signal input circuit stops input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610292796.1A CN105772312A (en) | 2016-05-05 | 2016-05-05 | Ultrasonic aromatization sheet frequency sweep circuit and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610292796.1A CN105772312A (en) | 2016-05-05 | 2016-05-05 | Ultrasonic aromatization sheet frequency sweep circuit and method |
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| CN105772312A true CN105772312A (en) | 2016-07-20 |
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| CN201610292796.1A Pending CN105772312A (en) | 2016-05-05 | 2016-05-05 | Ultrasonic aromatization sheet frequency sweep circuit and method |
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| CN107320819A (en) * | 2017-08-09 | 2017-11-07 | 广西星呼吸文化传播有限公司 | A kind of atomizer and its method for air-breathing control |
| CN108702132A (en) * | 2017-12-12 | 2018-10-23 | 深圳和而泰数据资源与云技术有限公司 | A kind of frequency locking circuit and its control method |
| CN109620990A (en) * | 2018-12-26 | 2019-04-16 | 深圳飞安瑞科技股份有限公司 | A kind of ultrasonic wave fumigation device of constant spray amount |
| WO2019238062A1 (en) * | 2018-06-14 | 2019-12-19 | 湖南中烟工业有限责任公司 | Ultrasonic electronic cigarette frequency tracking method |
| CN111438026A (en) * | 2020-03-25 | 2020-07-24 | 广州厚达电子科技有限公司 | Driving method and driving circuit of ultrasonic atomizer |
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| CN111438026A (en) * | 2020-03-25 | 2020-07-24 | 广州厚达电子科技有限公司 | Driving method and driving circuit of ultrasonic atomizer |
| CN111438026B (en) * | 2020-03-25 | 2022-03-11 | 广州厚达电子科技有限公司 | Driving method of ultrasonic atomizer |
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