CN208635263U - Ultrasonic humidifier vibration piece high-efficiency vibration device - Google Patents
Ultrasonic humidifier vibration piece high-efficiency vibration device Download PDFInfo
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- CN208635263U CN208635263U CN201820598917.XU CN201820598917U CN208635263U CN 208635263 U CN208635263 U CN 208635263U CN 201820598917 U CN201820598917 U CN 201820598917U CN 208635263 U CN208635263 U CN 208635263U
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Abstract
The utility model relates to a kind of ultrasonic humidifier vibration piece high-efficiency vibration device, which includes MCU processing module, resonance plate trigger circuit, vibration piece and fan circuit, feedback sampling circuit, LED display module and keyboard input module；The keyboard input module, MCU processing module, resonance plate trigger circuit, vibration piece fan circuit are sequentially connected；One end connection vibration piece and fan circuit of the feedback sampling circuit, the other end connect MCU processing module；The MCU processing module is connect with LED display module.Compared with prior art, the utility model has many advantages, such as simple and convenient and high-efficient atomizing.
Description
Technical field
The utility model relates to ultrasonic humidifier fields, more particularly, to a kind of ultrasonic humidifier vibration piece high-efficiency vibration
Device.
Background technique
The humidifier realized by ultrasonic atomization principle, core are the supersonic oscillations intrinsic using piezoelectric ceramics
The characteristics of, it is realized and is resonated by the intrinsic frequency of building oscillating circuit and piezoelectric ceramics, to realize piezoelectric ceramic piece surface
Liquid be atomized into the molecules of um grades of sizes.But it due to the limitation of piezoelectric ceramic piece manufacturing condition, can not achieve
All piezoelectric ceramic pieces keep same resonant frequency, while in routine use, and potsherd also can be by temperature, and the reasons such as voltage are total
Vibration frequency point can be offset.Thus realize that the vibrating circuit that atomizing needs to cooperate needs constantly adjustment.
Popular ultrasonic humidifier currently on the market, there are two types of the implementation of resonant circuit is usual, one kind is passes through
The RC oscillating circuit of resistance capacitance is built, cooperation piezoelectric ceramic piece realizes resonance, completes liquid atomization.The drawbacks of such technology, exists
In needing to adjust resistance when leaving the factory, change the frequency of RC oscillating circuit to maximize nebulization efficiency, need in process of production
Investment is a large amount of to wait manpowers, and production efficiency is limited, high production cost.Another technology is to realize PWM by MCU timer interruption
The drawbacks of wave output, timer is adjusted, is to realize that I/O port is overturn by clock count, so as to cause the adjusting of PWM precision
It is low.It can only do and change on certain several Frequency point.
It main problem is that, is vibrated using adjusting RC at present for the analysis of the two schemes of the prior art
Mode, adjustable extent is linear and extensively, but high production cost.And PWM directly is exported using the timer interruption of existing MCU
Function is realized chases after frequency in real time, and adjustable accuracy is low, and nebulization efficiency is not high.
Utility model content
The purpose of this utility model is exactly to provide a kind of ultrasonic wave in order to overcome the problems of the above-mentioned prior art and add
Wet device vibration piece high-efficiency vibration device, can adjust PWM wave output and real-time tracking piezoelectric ceramic piece status adjustment in high precision
PWM wave, realization is simple and convenient in production link, is using link energy high-efficient atomizing again.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of ultrasonic humidifier vibration piece high-efficiency vibration device, the device include MCU processing module, resonance plate triggering electricity
Road, vibration piece and fan circuit, feedback sampling circuit, LED display module and keyboard input module；
The keyboard input module, MCU processing module, resonance plate trigger circuit, vibration piece fan circuit are sequentially connected；Institute
One end connection vibration piece and fan circuit for the feedback sampling circuit stated, the other end connect MCU processing module；The MCU processing
Module is connect with LED display module.
Preferably, the resonance plate trigger circuit includes trigger circuit, filter circuit and amplifies feedback circuit, described
MCU processing module is successively connect with trigger circuit, filter circuit and amplification feedback circuit, the amplification feedback circuit and vibration piece
It is connect with fan circuit.
Preferably, the MCU processing module includes primary processor, D/A converting circuit, nonvolatile memory, PPG
Generator, interface circuit and dynamic memory；The primary processor respectively with D/A converting circuit, nonvolatile memory,
PPG generator, interface circuit, dynamic memory connection, the primary processor pass through PPG generator and resonance plate trigger circuit
Connection, the primary processor by interface circuit respectively with keyboard input module, LED display module and vibration piece and fan circuit
Fan connection, the primary processor connect by D/A converting circuit with feedback sampling circuit.
Preferably, the primary processor includes IHRC clock, eight pre- frequency counters and IHRCTD register, described
Eight pre- frequency counters connect respectively with IHRC clock, IHRCTD register and PPG generator.
Compared with prior art, the utility model has the advantage that
1, the utility model can adjust PWM wave output and real-time tracking piezoelectric ceramic piece status adjustment PWM in high precision
Wave.
2, the utility model is simple and convenient in production link.
3, the utility model is using link energy high-efficient atomizing.
Detailed description of the invention
Fig. 1 is the functional block diagram of existing PPG module.
Fig. 2 is the apparatus structure schematic diagram of the utility model.
Fig. 3 is principle connection schematic diagram inside the device of the utility model.
Fig. 4 is the working principle diagram of the PGG generator of the utility model.
Specific embodiment
Below by the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described
Embodiment is a part of the embodiment of the utility model, rather than whole embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work all should belong to this
The range of utility model protection.
As shown in Figures 2 and 3, a kind of ultrasonic humidifier vibration piece high-efficiency vibration device, the device include MCU processing mould
Block 20, resonance plate trigger circuit 21, vibration piece and fan circuit 23, feedback sampling circuit 22, LED display module 25 and key are defeated
Enter module 24；
The keyboard input module 24, MCU processing module 20, resonance plate trigger circuit 21, vibration piece fan circuit 23 according to
Secondary connection；One end connection vibration piece and fan circuit 23 of the feedback sampling circuit 22, the other end connect MCU processing module
20；The MCU processing module 20 is connect with LED display module 25, and the MCU processing module 20 is from base frequency and counting
Two aspects of frequency adjust the PWM waveform for being transmitted to resonance plate trigger circuit 21 in real time.
The resonance plate trigger circuit 21 includes trigger circuit 211, filter circuit 212 and amplification feedback circuit 213,
The MCU processing module 20 is successively connect with trigger circuit 211, filter circuit 212 and amplification feedback circuit 213, described
Amplification feedback circuit 213 is connect with vibration piece with fan circuit 23.
The MCU processing module 20 include primary processor 201, D/A converting circuit 207, nonvolatile memory 203,
PPG generator 206, interface circuit 202 and dynamic memory 204；The primary processor 201 respectively with D/A converting circuit
207, nonvolatile memory 203, PPG generator 206, interface circuit 202, dynamic memory 204 connect, the main process task
Device 201 is connect by PPG generator 206 with resonance plate trigger circuit 21, and the primary processor 201 passes through interface circuit 202
It is connect respectively with keyboard input module 24, LED display module 25 and vibration piece with the fan of fan circuit 23, the main process task
Device 201 is connect by D/A converting circuit 207 with feedback sampling circuit 22.
The primary processor 201 include IHRC clock, eight pre- frequency counters and IHRCTD register, described eight
The pre- frequency counter in position is connect with IHRC clock, IHRCTD register and PPG generator 206 respectively；
The primary processor 201 configures IHRCTD register by program and adjusts the master that internal high frequency IHRC clock generates
Clock, the clock exported after adjusting is transmitted to PPG generator 206 by eight pre- frequency counters, as fundamental frequency.
The primary processor 201 completes the system control of whole device, the input including key range input module 24
Signal, control LED display module 25；
The nonvolatile memory 203 saves system starting code and configuration information, the dynamic memory 204
As the internal storage location of primary processor 201, the interface circuit 202 completes primary processor 201 and the model of external module passes
Defeated, the PPG generator 206 is counted by the chronomere from clock realizes PWM output, the digital-to-analogue conversion electricity
Road 207 is converted into digital signal by reading external analog signal input.
The resonance plate trigger circuit 21 is the resonance plate trigger circuit for amplifying PWM waveform and triggering resonance plate,
The vibration piece and fan circuit 23 are the vibration piece and fan circuit for atomized liquid and blowout；The feedback sample electricity
Road 22 is used to detect the feedback sampling circuit of resonance plate working condition；The ED display module 25 is for showing work at present
LED display module；The keyboard input module 24 is the keyboard input module inputted for user.
As shown in figure 4, using the utility model entity apparatus operation workflow, as shown in Figure 4, the specific steps are as follows:
S1. key module receives enabling signal, system and device starting, and main processor modules start PPG generator, start defeated
PWM waveform out, for the first time starting are default output 1.7M resonance plate trigger circuit, pass through trigger circuit, filter circuit, amplification electricity
The effect of road three-level, final output one stable triggering waveform cause resonance plate to start to gradually increase amplitude, and vibration frequency is gradually
It is consistent in trigger signal.
S2. liquid is gradually had atomizing effect by the effect of resonance plate, and feedback sampling circuit access starts to capture resonance plate
Working condition feeds back to primary processor and receives feedback signal, and the PWM of output is trimmed according to PPG module and IHRCTD register
Waveform, resonance plate receive the PWM wave of new frequency, and again close to new trigger signal, feed circuit continues to catch vibration frequency
Resonance plate working condition is obtained, primary processor is fed back to, then realizes the fine tuning more refined, until resonance plate vibration efficiency reaches most
It is excellent, liquid nebulization efficiency highest.
S3. entire spray pattern is completed, and corresponding effect is realized and shown by LED display module by main processing block.
Programmable pulse generator (PPG) module based on MCU processor, export the recommendation of piezoelectric ceramics resonance
Frequency, such as a frequency of the resonant frequency near 1.7MHz, i.e., near 1.7MHz of certain common piezoelectric ceramic piece
Point resonance plate Oscillation Amplitude is maximum, vibration efficiency highest.We realize output 1.68MHz's by configuring the PPG module of MCU
PWM wave type.The functional block diagram of PPG module is as shown in Fig. 1:
IHRCCLK is the built-in high frequency RC oscillation of the factory calibration of 32Mhz, and 8 pre- frequency counters need to be configured to 1 point
Frequently, 12 digit counters need to configure to count 19 times, and duty ratio is configured to 9.
Typical Disposition code is
IOMUXC2=0x0F；
PPGOMD=0x0F；
PPGPH=0；
PPGPL=18；//19
C0DH=0；
C0DL=9；
According to the above configuration, the side of 32MHz/19=1.684MHz can be exported on the IO of MCU by being reconfigured corresponding I
Wave, the square wave output of this frequency are a basic output frequency.The core technology of this patent is carried out on this output frequency
How fine tuning, be finely adjusted, and needs to be directed to a calibration register of IHRC using Rainbow MCU, can by this register
To adjust the frequency (32MHz) for being originally the IHRC calibrated when leaving the factory, to realize the fine tuning of output frequency.
If IHRC increases the frequency of 0.2MHz: 32.2MHz/19=1.694MHz, compared with original 1.684MHz,
0.01M (10K) is only increased, to realize the output of the PWM wave fine tuning of 10K rank, the fine tuning technology of such IHRC is big
The frequency accuracy of PMW wave output is improved greatly, and small stepping is realized by the frequency shift of IHRC and the frequency dividing of PPG module
PWM wave frequency.
Only with the mode of timer, there is higher limitation to MCU dominant frequency, such as uses 16M dominant frequency, signal period time
For 0.0625uS, with this clock cycle count, and the cycle time of 1.7MHz is 0.588uS, due to needing to export square wave then, often
Half period needs to enter timer interruption and overturns an IO, and therefore timer time is only 0.588/2=0.294uS,
Then the corresponding number that counts is the rate-adaptive pacemaker that the corresponding timer of 0.294/0.0625~5. may be implemented are as follows:
| Number | Frequency (MHz) |
| 1 | 1.6 |
| 2 | 1.778 |
| 3 | 2 |
The condition and range actually obtained is limited, the adjusting of two points near 1.7MHz only may be implemented, for atomizer
For scheme, realization function is only accomplished.But the high-efficient atomizing technology for passing through the utility model, may be implemented 10KHz frequency
Fine tuning, in actual application, following data is the fine tuning data exported by the PWM wave of MCU.
| Number | Frequency (MHz) |
| 1 | 1.657 |
| 2 | 1.665 |
| 3 | 1.674 |
| 4 | 1.684 |
| 5 | 1.692 |
| 6 | 1.701 |
| 7 | 1.711 |
| 8 | 1.721 |
| 9 | 1.73 |
| 10 | 1.738 |
| 11 | 1.746 |
| 12 | 1.758 |
| 13 | 1.768 |
It can be seen that practical adjustments precision about can achieve 10K grades of stepping near 1.7MHz, in 1.6MHz to 1.8Hz
The function of atomization has not only may be implemented it can be selected that it is possible thereby to realize the adjusting of fining in about 20 Frequency points, and
And according to the characteristic of resonance plate, closer to resonant frequency point, amplitude is bigger so as to realizing higher nebulization efficiency.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, anyone skilled in the art within the technical scope disclosed by the utility model, can be readily occurred in various
Equivalent modifications or substitutions, these modifications or substitutions should be covered within the scope of the utility model.Therefore, this is practical
Novel protection scope should be subject to the protection scope in claims.
Claims (4)
- The piece high-efficiency vibration device 1. a kind of ultrasonic humidifier shakes, which is characterized in that the device include MCU processing module (20), Resonance plate trigger circuit (21), vibration piece and fan circuit (23), feedback sampling circuit (22), LED display module (25) and key Input module (24)；The keyboard input module (24), MCU processing module (20), resonance plate trigger circuit (21), vibration piece fan circuit (23) it is sequentially connected；One end connection vibration piece of the feedback sampling circuit (22) and fan circuit (23), the other end connect MCU Processing module (20)；The MCU processing module (20) is connect with LED display module (25).
- The piece high-efficiency vibration device 2. a kind of ultrasonic humidifier according to claim 1 shakes, which is characterized in that described is total to Vibration piece trigger circuit (21) includes trigger circuit (211), filter circuit (212) and amplification feedback circuit (213), the MCU Processing module (20) is successively connect with trigger circuit (211), filter circuit (212) and amplification feedback circuit (213), and described puts Big feedback circuit (213) is connect with vibration piece with fan circuit (23).
- The piece high-efficiency vibration device 3. a kind of ultrasonic humidifier according to claim 1 shakes, which is characterized in that described MCU processing module (20) includes primary processor (201), D/A converting circuit (207), nonvolatile memory (203), PPG hair Raw device (206), interface circuit (202) and dynamic memory (204)；The primary processor (201) is electric with digital-to-analogue conversion respectively Road (207), nonvolatile memory (203), PPG generator (206), interface circuit (202), dynamic memory (204) connection, The primary processor (201) is connect by PPG generator (206) with resonance plate trigger circuit (21), the primary processor (201) by interface circuit (202) respectively with keyboard input module (24), LED display module (25) and shake piece and fan circuit (23) fan connection, the primary processor (201) are connected by D/A converting circuit (207) and feedback sampling circuit (22) It connects.
- The piece high-efficiency vibration device 4. a kind of ultrasonic humidifier according to claim 3 shakes, which is characterized in that the master Processor (201) includes IHRC clock, eight pre- frequency counters and IHRCTD register, eight pre- frequency counters It is connect respectively with IHRC clock, IHRCTD register and PPG generator (206).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820598917.XU CN208635263U (en) | 2018-04-25 | 2018-04-25 | Ultrasonic humidifier vibration piece high-efficiency vibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820598917.XU CN208635263U (en) | 2018-04-25 | 2018-04-25 | Ultrasonic humidifier vibration piece high-efficiency vibration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208635263U true CN208635263U (en) | 2019-03-22 |
Family
ID=65733482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820598917.XU Active CN208635263U (en) | 2018-04-25 | 2018-04-25 | Ultrasonic humidifier vibration piece high-efficiency vibration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208635263U (en) |
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2018
- 2018-04-25 CN CN201820598917.XU patent/CN208635263U/en active Active
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