CN107582198A - A kind of self-adapting ultrasonic tooth-cleaning machine - Google Patents
A kind of self-adapting ultrasonic tooth-cleaning machine Download PDFInfo
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- CN107582198A CN107582198A CN201710947595.5A CN201710947595A CN107582198A CN 107582198 A CN107582198 A CN 107582198A CN 201710947595 A CN201710947595 A CN 201710947595A CN 107582198 A CN107582198 A CN 107582198A
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Abstract
The invention provides a kind of 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 power subsystem；Oscillating unit produces the controllable pulse of recommending of dutycycle under the control of MPU microprocessor units and exported, and the frequency of oscillation of frequency control unit control oscillating unit is sent data to by MPU microprocessor units, the dutycycle and frequency for making oscillator signal caused by oscillating unit are controlled by MPU microprocessor units, oscillator signal driving machine tool vibration unit after power amplification unit amplifies, sonic oscillation electric signal is converted into ultrasonic mechanical vibration signal.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, can remove the dirts such as tartar and calculus dentalis well.
Description
Technical field
The present invention relates to medical shaping and beauty equipment technical field, more particularly to a kind of self-adapting ultrasonic tooth-cleaning 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.
The content of the invention
(1) technical problem solved
In order to solve the above problems, the invention provides a kind of self-adapting ultrasonic tooth-cleaning machine, can automatically scanning search most
Good resonance point, resonant frequency and oscillation intensity number lock, resonance point drift is minimum, and operating efficiency is high, improve stability and
Reliability.
(2) technical scheme
A kind of 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 power subsystem；The oscillating unit exists
The controllable pulse of recommending of the lower generation dutycycle of MPU microprocessor units control exports, and by the MPU microprocessor units
The frequency of oscillation that the frequency control unit controls the oscillating unit is sent data to, makes to vibrate caused by the oscillating unit
The dutycycle and frequency of signal are controlled by the MPU microprocessor units, and the oscillator signal is put through the power amplification unit
Sonic oscillation electric signal, is converted into ultrasonic mechanical vibration signal by the driving mechanical vibration element after big.
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.
(3) beneficial effect
The invention provides a kind of self-adapting ultrasonic tooth-cleaning machine, can automatically scanning search optimum resonance point, resonant frequency
With oscillation intensity number lock, resonance point drift is minimum, and operating efficiency is high, improves stability and reliability, and service life is grown,
The dirts such as tartar and calculus dentalis can be removed well, reach the effect of tooth attractive in appearance.
Brief description of the drawings
Fig. 1 is a kind of system architecture diagram of self-adapting ultrasonic tooth-cleaning machine involved in the present invention.
Fig. 2 is a kind of MPU microprocessor unit circuit schematic diagrams of self-adapting ultrasonic tooth-cleaning machine involved in the present invention.
Fig. 3 is a kind of oscillating unit circuit theory diagrams of self-adapting ultrasonic tooth-cleaning machine involved in the present invention.
Fig. 4 is a kind of frequency control unit circuit theory diagrams of self-adapting ultrasonic tooth-cleaning machine involved in the present invention.
Fig. 5 is a kind of intensity control unit circuit theory diagrams of self-adapting ultrasonic tooth-cleaning machine involved in the present invention.
Fig. 6 is a kind of power amplification unit circuit theory diagrams of self-adapting ultrasonic tooth-cleaning machine involved in the present invention.
Fig. 7 is a kind of current feedback sampling unit circuit theory of 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 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 power subsystem processed；Vibration
Unit produces the controllable pulse of recommending of dutycycle under the control of MPU microprocessor units and exported, and is sent out by MPU microprocessor units
Transmit data to frequency control unit control oscillating unit frequency of oscillation, make oscillator signal caused by oscillating unit dutycycle and
Frequency is controlled by MPU microprocessor units, oscillator signal driving machine tool vibration unit after power amplification unit amplifies, ultrasound
Electric oscillation signal is converted into ultrasonic mechanical vibration signal.The ultrasonic mechanical vibration signal can remove tartar and calculus dentalis etc. well
Dirt, so as to reach the effect of tooth attractive in appearance.
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.
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 self-adapting ultrasonic tooth-cleaning machine, can automatically scanning search optimum resonance point, resonant frequency
With oscillation intensity number lock, resonance point drift is minimum, and operating efficiency is high, improves stability and reliability, and service life is grown,
The dirts such as tartar and calculus dentalis can be removed well, reach the effect of tooth attractive in appearance.
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 (8)
- A kind of 1. self-adapting ultrasonic tooth-cleaning machine, it is characterised in that：Including MPU microprocessor units, oscillating unit, FREQUENCY CONTROL Unit, intensity control unit, power amplification unit, current sample feedback unit, mechanical vibration element and power subsystem；It is described to shake The controllable pulse of recommending of unit generation dutycycle under MPU microprocessor units control is swung to export, and it is micro- by the MPU Reason device unit sends data to the frequency of oscillation that the frequency control unit controls the oscillating unit, produces the oscillating unit The dutycycle and frequency of raw oscillator signal are controlled by the MPU microprocessor units, and the oscillator signal is put through the power The mechanical vibration element is driven after big unit amplification, sonic oscillation electric signal is converted into ultrasonic mechanical vibration signal.
- A kind of 2. self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that：The MPU microprocessors list Member includes MPU microprocessor chips, quartz crystal oscillator, optical coupling isolator, triode, the first light emitting diode, the first diode, the One~the 6th resistance and the first~the 4th electric capacity, wherein the MPU microprocessor chips are PIC16F73, the optical coupling isolator For TLP520-1, the 4th electric capacity is electrochemical capacitor.
- A kind of 3. self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that：The oscillating unit includes arteries and veins Wide modulator, the first rheostat, the 7th~the 15th resistance and the 5th~the 11st electric capacity, wherein the pulse width modulator is TL494, the 6th and the 7th electric capacity is electrochemical capacitor.
- A kind of 4. self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that：The frequency control unit bag Digital regulation resistance and the 15th electric capacity are included, wherein the digital regulation resistance is MCP41010.
- A kind of 5. self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that：The intensity control unit bag Include the second rheostat, the 16th electric capacity, the 17th electric capacity, the 23rd resistance and the 24th resistance.
- A kind of 6. self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that：The power amplification unit bag Include high frequency transformer, the first FET, the second FET and the 25th~the 28th resistance.
- A kind of 7. self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that：The current sample feedback Member includes operational amplifier, the 16th~the 22nd resistance and the 12nd~the 14th electric capacity, wherein the operational amplifier For MCP602.
- A kind of 8. self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that：The mechanical vibration element is Piezoelectric ceramic piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710947595.5A CN107582198A (en) | 2017-10-12 | 2017-10-12 | A kind of self-adapting ultrasonic tooth-cleaning machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710947595.5A CN107582198A (en) | 2017-10-12 | 2017-10-12 | A kind of self-adapting ultrasonic tooth-cleaning machine |
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| CN107582198A true CN107582198A (en) | 2018-01-16 |
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| CN201710947595.5A Withdrawn CN107582198A (en) | 2017-10-12 | 2017-10-12 | A kind of self-adapting ultrasonic tooth-cleaning machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109394374A (en) * | 2018-12-30 | 2019-03-01 | 常州赛乐医疗技术有限公司 | A kind of root canal, which is swung, washes device |
| CN111658210A (en) * | 2020-06-09 | 2020-09-15 | 桂林市啄木鸟医疗器械有限公司 | Small-sized hand-held comfortable dental scaler |
| TWI805397B (en) * | 2022-06-06 | 2023-06-11 | 原華電子股份有限公司 | Programmable ultrasonic controller |
-
2017
- 2017-10-12 CN CN201710947595.5A patent/CN107582198A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109394374A (en) * | 2018-12-30 | 2019-03-01 | 常州赛乐医疗技术有限公司 | A kind of root canal, which is swung, washes device |
| CN109394374B (en) * | 2018-12-30 | 2024-05-10 | 常州赛乐医疗技术有限公司 | Root canal swinging and washing device |
| CN111658210A (en) * | 2020-06-09 | 2020-09-15 | 桂林市啄木鸟医疗器械有限公司 | Small-sized hand-held comfortable dental scaler |
| TWI805397B (en) * | 2022-06-06 | 2023-06-11 | 原華電子股份有限公司 | Programmable ultrasonic controller |
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Application publication date: 20180116 |