CN107582199A - A kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine - Google Patents
A kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine Download PDFInfo
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- CN107582199A CN107582199A CN201710948879.6A CN201710948879A CN107582199A CN 107582199 A CN107582199 A CN 107582199A CN 201710948879 A CN201710948879 A CN 201710948879A CN 107582199 A CN107582199 A CN 107582199A
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Abstract
The invention provides a kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine, including MPU microprocessor units, oscillating unit, frequency control unit, intensity control unit, power amplification unit, current sample feedback unit, mechanical vibration element and switching power supply.The present invention can automatically scanning search optimum resonance point, resonant frequency and oscillation intensity number lock, resonance point drift is minimum, and operating efficiency is high, improves stability and reliability, the dirts such as tartar and calculus dentalis can be removed well, reach the effect of tooth attractive in appearance, and the heating of power unit is reduced as power supply using Switching Power Supply, built-in temperature is low, extends service life.
Description
Technical field
The present invention relates to medical shaping and beauty equipment technical field, more particularly to a kind of low-temperature-rise self-adapting ultrasonic cleans one's teeth
Machine.
Background technology
Ultrasonic cavitron be used in the process of ultrasonic tooth to the machine that cleans one's teeth, promoted and cleaned one's teeth work by ultrasonic wave
Make point, the dental scaler operation tip being vibrated is stretched into oral cavity, loosens the bonding of bacterial plaque, tartar and tiny dental calculus and tooth
Thing, smashes the dirt of dental surface, while is constantly rinsed with water, removes the calculus dentalis of dental surface, completes toothwash.
Its oscillator signal of existing ultrasonic cavitron is generally directly produced PWM outputs, this method by singlechip controller
Although succinct convenient, two defects be present：First, it is impossible to push-pull oscillator signal is produced, thus power amplification circuit can only work
Make in positive half cycle, efficiency is low, and it is more serious to generate heat, and is unfavorable for circuit stability work；Second, the resonance point of piezoelectric ceramic piece exists
(30 ± 5) KHz, resonance frequency band width≤80Hz, and the PWM of singlechip controller is exported under 25~35KHz frequencies, Step Frequency
Rate >=100Hz, therefore the PWM outputs of singlechip controller may can not find the optimum resonance point of piezoelectric ceramic piece, further drop
Low operating efficiency.
And ultrasonic cavitron power in normal work is 10~20W, it is desirable in 180~250V wide-voltage range
Interior work, therefore general power supply can produce amount of heat when ultrasonic cavitron works, and cause built-in temperature too high, it is long
Time service easily causes system job insecurity.
The content of the invention
(1) technical problem solved
, can automatically scanning the invention provides a kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine in order to solve the above problems
Optimum resonance point, resonant frequency and oscillation intensity number lock are searched for, resonance point drift is minimum, and operating efficiency is high, reduces electricity
Source part generates heat, and improves stability and reliability, extends service life.
(2) technical scheme
A kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine, including MPU microprocessor units, oscillating unit, FREQUENCY CONTROL list
Member, intensity control unit, power amplification unit, current sample feedback unit, mechanical vibration element and switching power supply；It is described
Oscillating unit produces the controllable pulse of recommending of dutycycle under MPU microprocessor units control and exported, and micro- by the MPU
Processor unit sends data to the frequency of oscillation that the frequency control unit controls the oscillating unit, makes the oscillating unit
The dutycycle and frequency of caused oscillator signal are controlled by the MPU microprocessor units, and the oscillator signal is through the power
The mechanical vibration element is driven after amplifying unit amplification, sonic oscillation electric signal is converted into ultrasonic mechanical vibration signal, institute
State switching power supply to power to other each units, and limit output voltage and electric current, reduce power unit heating.
Further, the MPU microprocessor units include MPU microprocessor chips, quartz crystal oscillator, optical coupling isolator,
Triode, the first light emitting diode, the first diode, the first~the 6th resistance and the first~the 4th electric capacity, wherein the MPU is micro-
Processor chips are PIC16F73, and the optical coupling isolator is TLP520-1, and the 4th electric capacity is electrochemical capacitor.
Further, the oscillating unit includes pulse width modulator, the first rheostat, the 7th~the 15th resistance and the 5th
~the ten one electric capacity, wherein the pulse width modulator is TL494, the 6th and the 7th electric capacity is electrochemical capacitor.
Further, the frequency control unit includes digital regulation resistance and the 15th electric capacity, wherein the digital current potential
Device is MCP41010.
Further, the intensity control unit includes the second rheostat, the 16th electric capacity, the 17th electric capacity, the 20th
Three resistance and the 24th resistance.
Further, the power amplification unit includes high frequency transformer, the first FET, the second FET and the
25~the 28th resistance.
Further, the current sample feedback unit includes operational amplifier, the 16th~the 22 resistance and the
12~the 14th electric capacity, wherein the operational amplifier is MCP602.
Further, the mechanical vibration element is piezoelectric ceramic piece.
Further, the switching power supply includes current rectifying and wave filtering circuit, DC-DC conversion circuit and mu balanced circuit；Institute
Stating current rectifying and wave filtering circuit includes the first inductance, the second inductance, rectifier, the 18th electric capacity and the 19th electric capacity, and the DC-DC becomes
Changing circuit includes DC-DC converter, the 3rd inductance, the 3rd diode, the 20th~the 23rd electric capacity and the 29~the
31 resistance, the mu balanced circuit include LDO voltage stabilizer, the 4th inductance, the second light emitting diode, the 24th~the 20th
Seven electric capacity and the 32nd resistance.
Further, the DC-DC converter is MC34063, and the LDO voltage stabilizer is LM7805, the described 20th,
24th and the 27th electric capacity is electrochemical capacitor.
(3) beneficial effect
The invention provides a kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine, can automatically scanning search optimum resonance point, it is humorous
Vibration frequency and oscillation intensity number lock, resonance point drift is minimum, and operating efficiency is high, improves stability and reliability, can be good
The dirts such as tartar and calculus dentalis are removed well, reach the effect of tooth attractive in appearance, and reduced as power supply using Switching Power Supply
The heating of power unit, built-in temperature is low, extend service life.
Brief description of the drawings
Fig. 1 is a kind of system architecture diagram of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine involved in the present invention.
Fig. 2 is a kind of MPU microprocessor unit circuits of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine involved in the present invention
Schematic diagram.
Fig. 3 is a kind of oscillating unit circuit theory diagrams of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine involved in the present invention.
Fig. 4 is a kind of frequency control unit circuit theory of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine involved in the present invention
Figure.
Fig. 5 is a kind of intensity control unit circuit theory of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine involved in the present invention
Figure.
Fig. 6 is a kind of power amplification unit circuit theory of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine involved in the present invention
Figure.
Fig. 7 is a kind of current feedback sampling unit circuit of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine involved in the present invention
Schematic diagram.
Fig. 8 is a kind of switching power supply circuit theory of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine involved in the present invention
Figure.
Embodiment
Embodiment involved in the present invention is described in further details below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine, including MPU microprocessor units, oscillating unit,
Frequency control unit, intensity control unit, power amplification unit, current sample feedback unit, mechanical vibration element and switch electricity
Source unit；Oscillating unit produces the controllable pulse of recommending of dutycycle under the control of MPU microprocessor units and exported, and micro- by MPU
Processor unit sends data to the frequency of oscillation of frequency control unit control oscillating unit, makes vibration letter caused by oscillating unit
Number dutycycle and frequency controlled by MPU microprocessor units, oscillator signal driving machine tool after power amplification unit amplifies shakes
Moving cell, sonic oscillation electric signal is converted into ultrasonic mechanical vibration signal, the ultrasonic mechanical vibration signal can be removed well
The dirt such as tartar and calculus dentalis, so as to reach the effect of tooth attractive in appearance, switching power supply is powered to other each units, and is limited
Output voltage and electric current, reduce power unit heating.
As shown in Fig. 2 MPU microprocessor units include MPU microprocessor chips U1, quartz crystal oscillator X1, optical coupling isolator
U2, triode Q1, LED 1, diode D1, resistance R1~R6 and electric capacity C1~C4, wherein MPU microprocessors core
Piece U1 is PIC16F73, and optical coupling isolator U2 is TLP520-1, and electric capacity C4 is electrochemical capacitor.
As shown in figure 3, oscillating unit include pulse width modulator U3, rheostat Rw1, resistance R7~R15 and electric capacity C5~
C11, wherein pulse width modulator U3 are TL494, and electric capacity C6 and C7 are electrochemical capacitor.Oscillating circuit control chip uses TL494, pushes away
Draw oscillator signal to be exported by TL494 E1 pin and E2 pin, the frequency of the signal is by CT pin and RT pin external electric capacity CT and resistance
RT determines that CT and RT should be from the electric capacity and resistance of Low Drift Temperature.The signal oscillating frequency calculation formula is Fosc=1.1/2RT*
CT, the dutycycle of the signal are determined by TL494+V1 pin and the outer signal voltage of-V1 pin.
As shown in figure 4, frequency control unit includes digital regulation resistance U5 and electric capacity C15, wherein digital regulation resistance U5 is
MCP41010.To meet requirement that piezoelectric ceramic piece frequency of oscillation is 25~35KHz, step frequency≤80Hz, in Fig. 3 circuits
Rheostat Rw1 is the coarse adjustment potentiometer that resistance is 20K Ω, and digital regulation resistance U5 is the fine tuning potentiometer under PIC16F73 controls.
Rw1 coarse adjustment (being counted by 5K Ω of digital regulation resistance U5 resistances) is computed, it is 24.5~35.7KHz to make Fosc excursions, is met
It is required that.The digital regulation resistance U5 of fine tuning selects total resistance 10K Ω, 256 grades of adjustable MCP41010, MCP41010 and PIC16F73
Communication using conveniently SPI modes, stepping resistance are 39.0625 Ω.The step frequency of vibrator isStep frequency when frequency of oscillation is 35KHz is 30.4Hz, and frequency of oscillation is
Step frequency during 25KHz is 15.6Hz.Therefore, it can meet that piezoelectricity is made pottery using digital regulation resistance U5 controls TL494 working methods
The requirement of ceramics resonant bandwidth.
As shown in figure 5, intensity control unit includes rheostat Rw2, electric capacity C16, electric capacity C17, resistance R23 and resistance R24.
The PIC16F73 external potentiometer Rw2 of RA1 pin, adjust the analog voltage in diverse location then RA1 inputs different, through in PIC16F73
Portion A/D is converted to data signal, the dutycycle for the pwm signal that the signal deciding is exported by RC2 pin.Sent after pwm signal is filtered
To TL494-V1 pin, compared with the reference voltage Vref that+V1 pin are sent into, so as to determine TL494 E1 pin and the output of E2 pin
Oscillator signal pulsewidth is 0~48%.When pin switches off, it is high level that PIC16F73, which determines the input of RC3 pin, then
The E1 pin and E2 pin outputting oscillation signals dutycycle that PIC16F73 PWM output duty cycles are 0, TL494 are also 0, so as to control
Tooth-cleaning machine stops mechanical oscillation output.
As shown in fig. 6, power amplification unit includes high frequency transformer T1, FET Q2, FET Q3 and resistance R25
~R28.For ultrasonic mechanical oscillation in order to play the good effect that cleans one's teeth, mechanical oscillation must reach certain intensity, that is, be sent to pressure
The oscillator signal by TL494 outputs of electroceramics piece must first pass through power amplification.Because the immediate current that power tube flows through reaches
To 1.1A, to reduce power tube heating, fin is reduced, using FET as power drive pipe, stable performance, generate heat pole
It is few, it can effectively reduce circuit plate bulk.Signal after power amplification by high frequency transformer T1 boost to peak-to-peak value 250~
350V, it is sent to piezoelectric ceramic piece and is converted to ultrasonic mechanical oscillation.
As shown in fig. 7, current sample feedback unit include operational amplifier U4, resistance R16~R22 and electric capacity C12~
C14, wherein operational amplifier U4 are MCP602.Because the resonance point of piezoelectric ceramic piece is different, in order to allow circuit to adapt to
Various piezoelectric ceramic pieces, circuit should possess the function of automatically scanning search resonance point.When PIC16F73 just upper electricity, and pin is opened
When closing connection, RC2 PWM output pulse widths are fixed as 80%, so as to which TL494 E1 pin and the output signal pulsewidth of E2 pin are fixed not
Become.Simultaneously PIC16F73 send data to digital regulation resistance MCP41010 periodically, make MCP41010 PA0 pin and PW0 pin it
Between resistance step to 10K Ω from 0, then TL494 E1 pin and the output frequency of E2 pin are with 15.6~30.4Hz step changes.Account for
Sky, when oscillation signal frequency is consistent with the resonant frequency of piezoelectric ceramic piece, flows through FET source than changeless signal
The electric current of drain electrode is maximum.The electric current is sent to by being changed into voltage signal using resistance R19 after operational amplifier U4 amplifications
PIC16F73 RA0 pin, PIC16F73 carry out A/D to the voltage and are converted to numerical value Q, remember when Q is maximum and be sent to numeral
Potentiometer U5 data P.When digital regulation resistance U5 changes to 10K Ω by 0, the scanning search of piezoelectric ceramic piece resonance point is complete
Into.Data P is sent to digital regulation resistance U5, then TL494 exports the oscillator signal of fixed frequency, is the resonance of piezoelectric ceramic piece
Frequency.Operational amplifier U4 bandwidth must be more than 2MHz, because sampling resistor R19 crest voltage is in scanning search time-varying
Change quickly, if operational amplifier U4 bandwidth deficiency, may can not find the optimum resonance point of piezoelectric ceramic piece.This circuit selects
With the MCP602 with a width of 2.8MHz.
As shown in figure 8, switching power supply includes current rectifying and wave filtering circuit, DC-DC conversion circuit and mu balanced circuit；Rectification is filtered
Wave circuit includes inductance L1, inductance L2, rectifier D2, electric capacity C18 and electric capacity C19, and DC-DC conversion circuit converts including DC-DC
Device U6, inductance L3, diode D3, electric capacity C20~C23 and resistance R29~R31, mu balanced circuit include LDO voltage stabilizer U7, inductance
L4, LED 2, electric capacity C24~C27 and resistance R32.Wherein, DC-DC converter U6 is MC34063, LDO voltage stabilizer
U7 is LM7805, and electric capacity C20, C24 and C27 are electrochemical capacitor.
Switching Power Supply uses the DC-DC control chip MC34063 of Motorola Inc., and the circuit has that circuit is simple, into
This cheap, efficiency high, the characteristics of temperature rise is low.Core parts MC34063 is a kind of monolithic bipolar Linear integrated circuit, is wrapped in piece
Containing temperature compensation bandgap a reference source, a duty cycle control vibrator driver and High-current output switch.Output electricity
U=(1+R2/R1) * 1.25V are pressed, current-limiting resistance R30 is 1 Ω, therefore output current is limited in 0.3V/1 Ω=0.3A.
Power-supply filter is accessed in the power input of tooth-cleaning machine, filters out the higher hamonic wave and impulse disturbances in power network.MPU
The model with hardware watchdog, or additional watchdog circuit are selected during microprocessor type selecting, can monitoring program be effectively
It is no to be absorbed in endless loop failure.Each chip power input and holding altogether and connect 0.1uF decoupling capacitor, to outside
The signal sent carries out light-coupled isolation.
The invention provides a kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine, can automatically scanning search optimum resonance point, it is humorous
Vibration frequency and oscillation intensity number lock, resonance point drift is minimum, and operating efficiency is high, improves stability and reliability, can be good
The dirts such as tartar and calculus dentalis are removed well, reach the effect of tooth attractive in appearance, and reduced as power supply using Switching Power Supply
The heating of power unit, built-in temperature is low, extend service life.
The above-described embodiments are merely illustrative of preferred embodiments of the present invention, not to the structure of the present invention
Think and scope is defined.On the premise of design concept of the present invention is not departed from, technology of the ordinary people in the field to the present invention
The all variations and modifications that scheme is made, all should drop into protection scope of the present invention, the claimed technology contents of the present invention,
All record in detail in the claims.
Claims (10)
- A kind of 1. low-temperature-rise self-adapting ultrasonic tooth-cleaning machine, it is characterised in that：Including MPU microprocessor units, oscillating unit, frequency Rate control unit, intensity control unit, power amplification unit, current sample feedback unit, mechanical vibration element and Switching Power Supply Unit；The oscillating unit produces the controllable pulse of recommending of dutycycle under MPU microprocessor units control and exported, and by The MPU microprocessor units send data to the frequency of oscillation that the frequency control unit controls the oscillating unit, make institute The dutycycle and frequency for stating oscillator signal caused by oscillating unit are controlled by the MPU microprocessor units, the oscillator signal The mechanical vibration element is driven after power amplification unit amplification, sonic oscillation electric signal, which is converted into ultrasonic machinery, to shake Dynamic signal, the switching power supply is powered to other each units, and limits output voltage and electric current, reduces power supply unit distribution Heat.
- A kind of 2. low-temperature-rise self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that：The micro- places of MPU Managing device unit includes MPU microprocessor chips, quartz crystal oscillator, optical coupling isolator, triode, the first light emitting diode, the one or two Pole pipe, the first~the 6th resistance and the first~the 4th electric capacity, wherein the MPU microprocessor chips are PIC16F73, the light Coupling isolator is TLP520-1, and the 4th electric capacity is electrochemical capacitor.
- A kind of 3. low-temperature-rise self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that：The oscillating unit Including pulse width modulator, the first rheostat, the 7th~the 15th resistance and the 5th~the 11st electric capacity, wherein the pulsewidth modulation Device is TL494, and the 6th and the 7th electric capacity is electrochemical capacitor.
- A kind of 4. low-temperature-rise self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that：The FREQUENCY CONTROL Unit includes digital regulation resistance and the 15th electric capacity, wherein the digital regulation resistance is MCP41010.
- A kind of 5. low-temperature-rise self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that：The strength control Unit includes the second rheostat, the 16th electric capacity, the 17th electric capacity, the 23rd resistance and the 24th resistance.
- A kind of 6. low-temperature-rise self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that：The power amplification Unit includes high frequency transformer, the first FET, the second FET and the 25th~the 28th resistance.
- A kind of 7. low-temperature-rise self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that：The current sample Feedback unit includes operational amplifier, the 16th~the 22nd resistance and the 12nd~the 14th electric capacity, wherein the computing Amplifier is MCP602.
- A kind of 8. low-temperature-rise self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that：The mechanical oscillation Unit is piezoelectric ceramic piece.
- A kind of 9. low-temperature-rise self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that：The Switching Power Supply Unit includes current rectifying and wave filtering circuit, DC-DC conversion circuit and mu balanced circuit；The current rectifying and wave filtering circuit includes the first inductance, the Two inductance, rectifier, the 18th electric capacity and the 19th electric capacity, the DC-DC conversion circuit include DC-DC converter, the 3rd electricity Sense, the 3rd diode, the 20th~the 23rd electric capacity and the 29th~the 31st resistance, the mu balanced circuit include LDO voltage stabilizer, the 4th inductance, the second light emitting diode, the 24th~the 27th electric capacity and the 32nd resistance.
- A kind of 10. low-temperature-rise self-adapting ultrasonic tooth-cleaning machine according to claim 9, it is characterised in that：The DC-DC becomes Parallel operation is MC34063, and the LDO voltage stabilizer is LM7805, and the electric capacity of the described 20th, the 24th and the 27th is electrolysis electricity Hold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710948879.6A CN107582199A (en) | 2017-10-12 | 2017-10-12 | A kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710948879.6A CN107582199A (en) | 2017-10-12 | 2017-10-12 | A kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine |
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| Publication Number | Publication Date |
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| CN107582199A true CN107582199A (en) | 2018-01-16 |
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ID=61053989
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710948879.6A Withdrawn CN107582199A (en) | 2017-10-12 | 2017-10-12 | A kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109044552A (en) * | 2018-07-27 | 2018-12-21 | 深圳博英特科技有限公司 | A kind of ultrasonic wave toothwash machine control system and method |
| CN114848197A (en) * | 2022-04-20 | 2022-08-05 | 深圳素士科技股份有限公司 | Control method and device for point-breaking type output water flow of tooth flushing device |
-
2017
- 2017-10-12 CN CN201710948879.6A patent/CN107582199A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109044552A (en) * | 2018-07-27 | 2018-12-21 | 深圳博英特科技有限公司 | A kind of ultrasonic wave toothwash machine control system and method |
| CN114848197A (en) * | 2022-04-20 | 2022-08-05 | 深圳素士科技股份有限公司 | Control method and device for point-breaking type output water flow of tooth flushing device |
| CN114848197B (en) * | 2022-04-20 | 2024-04-19 | 深圳素士科技股份有限公司 | Method and device for controlling point-off type output water flow of tooth flusher |
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Application publication date: 20180116 |