CN208741185U - 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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- CN208741185U CN208741185U CN201721313994.8U CN201721313994U CN208741185U CN 208741185 U CN208741185 U CN 208741185U CN 201721313994 U CN201721313994 U CN 201721313994U CN 208741185 U CN208741185 U CN 208741185U
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Abstract
The utility model provides a kind of self-adapting ultrasonic tooth-cleaning machine, including MPU microprocessor unit, oscillating unit, frequency control unit, intensity control unit, power amplification unit, current sample feedback unit, mechanical vibration element and power supply unit；Oscillating unit generates the controllable pulse of recommending of duty ratio under the control of MPU microprocessor unit and exports, and the frequency of oscillation of frequency control unit control oscillating unit is sent data to by MPU microprocessor unit, the duty ratio and frequency for the oscillator signal for generating oscillating unit are controlled by MPU microprocessor unit, sonic oscillation electric signal is converted into ultrasonic mechanical vibration signal by oscillator signal driving machine tool vibration unit after power amplification unit amplifies.The utility model can automatically scanning search for optimum resonance point, resonance frequency and oscillation intensity number lock, resonance point drift is minimum, and work efficiency is high, improves stability and reliability, can remove the dirts such as tartar and calculus dentalis well.
Description
Technical field
The utility model relates to medical shaping and beauty equipment technical field, in particular to a kind of self-adapting ultrasonic cleans one's teeth
Machine.
Background technique
Ultrasonic cavitron be used in the process of ultrasonic tooth to the machine that cleans one's teeth, cleaned one's teeth work by ultrasonic wave promotion
Make point, the dental scaler operation tip being vibrated is protruded into oral cavity, loosens the bonding of bacterial plaque, tartar and tiny dental calculus and tooth
Object is smashed the dirt of dental surface, while being constantly rinsed with water, and the calculus dentalis of dental surface is removed, and completes toothwash.
Its oscillator signal of existing ultrasonic cavitron is usually directly generated PWM output, this method by singlechip controller
Although succinct convenient, there are two defects: first, push-pull oscillator signal cannot be generated, thus power amplification circuit can only work
Make in positive half cycle, low efficiency, and it is more serious to generate heat, 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 exports the Step Frequency under 25~35KHz frequency
Rate >=100Hz, therefore the PWM output of singlechip controller may can not find the optimum resonance point of piezoelectric ceramic piece, further drop
Low working efficiency.
Utility model content
(1) the technical issues of solving
To solve the above-mentioned problems, the utility model provides a kind of self-adapting ultrasonic tooth-cleaning machine, can automatically scanning search
Rope optimum resonance point, resonance frequency and oscillation intensity number lock, resonance point drift is minimum, and work efficiency is high, improves stabilization
Property and reliability.
(2) technical solution
A kind of self-adapting ultrasonic tooth-cleaning machine, including MPU microprocessor unit, oscillating unit, frequency control unit, intensity
Control unit, power amplification unit, current sample feedback unit, mechanical vibration element and power supply unit；The oscillating unit exists
The controllable pulse of recommending of the lower generation duty ratio of MPU microprocessor unit control exports, and by the MPU microprocessor unit
The frequency of oscillation that the frequency control unit controls the oscillating unit is sent data to, the oscillation for generating the oscillating unit
The duty ratio and frequency of signal are controlled by the MPU microprocessor unit, 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 unit include MPU microprocessor chip, quartz crystal oscillator, optical coupling isolator,
Triode, the first light emitting diode, first diode, the first~the 6th resistance and the first~the 4th capacitor, wherein the MPU is micro-
Processor chips are PIC16F73, and the optical coupling isolator is TLP520-1, and the 4th capacitor is electrolytic capacitor.
Further, the oscillating unit includes pulse width modulator, the first rheostat, the 7th~the 15th resistance and the 5th
~the ten one capacitor, wherein the pulse width modulator is TL494, the 6th and the 7th capacitor is electrolytic capacitor.
Further, the frequency control unit includes digital regulation resistance and the 15th capacitor, wherein the number current potential
Device is MCP41010.
Further, the intensity control unit includes the second rheostat, the 16th capacitor, the 17th capacitor, the 20th
Three resistance and the 24th resistance.
Further, the power amplification unit includes high frequency transformer, the first field-effect tube, the second field-effect tube and
25~the 28th resistance.
Further, the current sample feedback unit includes operational amplifier, the 16th~the 22 resistance and
12~the 14th capacitor, wherein the operational amplifier is MCP602.
Further, the mechanical vibration element is piezoelectric ceramic piece.
(3) beneficial effect
The utility model provides a kind of self-adapting ultrasonic tooth-cleaning machine, can automatically scanning search for optimum resonance point, resonance
Frequency and oscillation intensity number lock, resonance point drift is minimum, and work efficiency is high, improves stability and reliability, uses the longevity
Life length, can remove the dirts such as tartar and calculus dentalis well, achieve the effect that beautiful tooth.
Detailed description of the invention
Fig. 1 is a kind of system structure diagram of self-adapting ultrasonic tooth-cleaning machine involved in the utility model.
Fig. 2 is that a kind of MPU microprocessor unit circuit of self-adapting ultrasonic tooth-cleaning machine involved in the utility model is former
Reason figure.
Fig. 3 is a kind of oscillating unit circuit diagram of self-adapting ultrasonic tooth-cleaning machine according to the present invention.
Fig. 4 is a kind of frequency control unit circuit theory of self-adapting ultrasonic tooth-cleaning machine involved in the utility model
Figure.
Fig. 5 is a kind of intensity control unit circuit theory of self-adapting ultrasonic tooth-cleaning machine involved in the utility model
Figure.
Fig. 6 is a kind of power amplification unit circuit theory of self-adapting ultrasonic tooth-cleaning machine involved in the utility model
Figure.
Fig. 7 is that a kind of current feedback sampling unit circuit of self-adapting ultrasonic tooth-cleaning machine involved in the utility model is former
Reason figure.
Specific embodiment
Embodiment involved in the utility model is described in further details with reference to the accompanying drawing.
As shown in Figure 1, a kind of self-adapting ultrasonic tooth-cleaning machine, including MPU microprocessor unit, oscillating unit, frequency control
Unit, intensity control unit, power amplification unit, current sample feedback unit, mechanical vibration element and power supply unit processed；Oscillation
Unit generates the controllable pulse of recommending of duty ratio under the control of MPU microprocessor unit and exports, and is sent out by MPU microprocessor unit
Transmit data to frequency control unit control oscillating unit frequency of oscillation, make oscillating unit generate oscillator signal duty ratio and
Frequency is controlled by MPU microprocessor unit, 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, to achieve the effect that beautiful tooth.
As shown in Fig. 2, MPU microprocessor unit includes MPU microprocessor chip U1, quartz crystal oscillator X1, optical coupling isolator
U2, triode Q1, Light-emitting diode LED 1, diode D1, resistance R1~R6 and capacitor C1~C4, wherein MPU microprocessor core
Piece U1 is PIC16F73, and optical coupling isolator U2 is TLP520-1, and capacitor C4 is electrolytic capacitor.
As shown in figure 3, oscillating unit include pulse width modulator U3, rheostat Rw1, resistance R7~R15 and capacitor C5~
C11, wherein pulse width modulator U3 is TL494, and capacitor C6 and C7 are electrolytic capacitor.Oscillating circuit controls chip and uses TL494, pushes away
It draws oscillator signal to be exported by the E1 foot and E2 foot of TL494, the frequency of the signal capacitor CT and resistance external by CT foot and RT foot
RT decision, CT and RT should select the capacitor and resistance of Low Drift Temperature.The signal oscillating frequency calculation formula is Fosc=1.1/2RT*
The duty ratio of CT, the signal are determined by+V1 the foot of TL494 and the outer signal voltage of-V1 foot.
As shown in figure 4, frequency control unit includes digital regulation resistance U5 and capacitor C15, wherein digital regulation resistance U5 is
MCP41010.It is 25~35KHz to meet piezoelectric ceramic piece frequency of oscillation, step frequency≤80Hz requirement, in Fig. 3 circuit
Rheostat Rw1 is the coarse adjustment potentiometer that resistance value is 20K Ω, and digital regulation resistance U5 is the fine tuning potentiometer under PIC16F73 control.
Be computed Rw1 coarse adjustment (by digital regulation resistance U5 resistance value be 5K Ω in terms of), make Fosc 24.5~35.7KHz of variation range, satisfaction
It is required that.The digital regulation resistance U5 of fine tuning selects total resistance value 10K Ω, 256 grades of adjustable MCP41010, MCP41010 and PIC16F73
Communication using conveniently SPI mode, stepping resistance value 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 when 25KHz is 15.6Hz.Therefore, piezoelectricity pottery can be met using digital regulation resistance U5 control TL494 working method
The requirement of tile resonant bandwidth.
As shown in figure 5, intensity control unit includes rheostat Rw2, capacitor C16, capacitor C17, resistance R23 and resistance R24.
The external potentiometer Rw2 of the RA1 foot of PIC16F73 is adjusted in the different location analog voltage difference that then RA1 is inputted, through in PIC16F73
Portion A/D is converted to digital signal, the duty ratio for the pwm signal which is exported by RC2 foot.Pwm signal is sent after filtering
To-V1 the foot of TL494, compared with the reference voltage Vref that+V1 foot is sent into, to determine what the E1 foot of TL494 and E2 foot exported
Oscillator signal pulsewidth is 0~48%.When pin, which switchs, to be disconnected, it is high level that PIC16F73, which determines the input of RC3 foot, then
The PWM output duty cycle of PIC16F73 is the E1 foot of 0, TL494 and E2 foot outputting oscillation signal duty ratio is also 0, to control
Tooth-cleaning machine stops mechanical oscillation output.
As shown in fig. 6, power amplification unit includes high frequency transformer T1, field-effect tube Q2, field-effect tube 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 output of electroceramics piece must first pass through power amplification.Since the immediate current that power tube flows through reaches
Cooling fin is reduced to reduce power tube fever to 1.1A, using field-effect tube as power drive pipe, performance is stablized, and generate heat pole
It is few, it can effectively reduce route plate bulk.Signal after power amplification by high frequency transformer T1 boost to peak-to-peak value 250~
350V 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 capacitor C12~
C14, wherein operational amplifier U4 is MCP602.Since the resonance point of piezoelectric ceramic piece is different, in order to allow circuit to adapt to
Various piezoelectric ceramic pieces, circuit should have the function of automatically scanning search resonance point.When PIC16F73 is just powered on, and pin is opened
When closing connection, the PWM output pulse width of RC2 is fixed as 80%, so that the output signal pulsewidth of the E1 foot of TL494 and E2 foot is fixed not
Become.Simultaneously PIC16F73 send data to digital regulation resistance MCP41010 periodically, make MCP41010 PA0 foot and PW0 foot it
Between resistance step to 10K Ω from 0, then the E1 foot of TL494 and the output frequency of E2 foot are with 15.6~30.4Hz step change.It accounts for
Sky flows through field-effect tube source when oscillation signal frequency is consistent with the resonance frequency of piezoelectric ceramic piece than changeless signal
The electric current of drain electrode is maximum.The electric current is sent to after operational amplifier U4 amplification by being changed into voltage signal using resistance R19
The RA0 foot of PIC16F73, PIC16F73 carry out A/D to the voltage and are converted to numerical value Q, remember when Q is maximum value and are sent to number
The data P of potentiometer U5.When digital regulation resistance U5 changes to 10K Ω by 0, the scanning search of piezoelectric ceramic piece resonance point is complete
At.Data P is sent to digital regulation resistance U5, then it is the resonance of piezoelectric ceramic piece that TL494, which exports the oscillator signal of fixed frequency,
Frequency.The bandwidth of operational amplifier U4 has to be greater than 2MHz, because the crest voltage of sampling resistor R19 is in scanning search time-varying
Change quickly, if the bandwidth of operational amplifier U4 is insufficient, the optimum resonance point of piezoelectric ceramic piece may be can not find.The choosing of this circuit
The MCP602 for being 2.8MHz with bandwidth.
Power-supply filter is accessed in the power input of tooth-cleaning machine, filters out the higher hamonic wave and impulse disturbances in power grid.MPU
The model with hardware watchdog or additional watchdog circuit are selected when microprocessor type selecting, can monitoring program be effectively
It is no to fall into endless loop failure.Each chip power input and common ground and connect the decoupling capacitor of a 0.1uF, to outside
The signal sent carries out light-coupled isolation.
The utility model provides a kind of self-adapting ultrasonic tooth-cleaning machine, can automatically scanning search for optimum resonance point, resonance
Frequency and oscillation intensity number lock, resonance point drift is minimum, and work efficiency is high, improves stability and reliability, uses the longevity
Life length, can remove the dirts such as tartar and calculus dentalis well, achieve the effect that beautiful tooth.
Embodiment described above is only that preferred embodiments of the present invention are described, not practical to this
Novel conception and scope is defined.Without departing from the design concept of the present utility model, ordinary people in the field couple
The all variations and modifications that the technical solution of the utility model is made, should fall within the protection scope of the present utility model, this reality
With novel claimed technology contents, it is all described in the claims.
Claims (7)
1. a kind of self-adapting ultrasonic tooth-cleaning machine, it is characterised in that: including MPU microprocessor unit, oscillating unit, frequency control
Unit, intensity control unit, power amplification unit, current sample feedback unit, mechanical vibration element and power supply unit；The vibration
It swings the controllable pulse of recommending of unit generation duty ratio under MPU microprocessor unit control to export, and 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 duty ratio and frequency of raw oscillator signal are controlled by the MPU microprocessor unit, 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；
The MPU microprocessor unit includes MPU microprocessor chip, quartz crystal oscillator, optical coupling isolator, triode, the first hair
Optical diode, first diode, the first~the 6th resistance and the first~the 4th capacitor, wherein the MPU microprocessor chip is
PIC16F73, the optical coupling isolator are TLP520-1, and the 4th capacitor is electrolytic capacitor.
2. a kind of 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 capacitor, wherein the pulse width modulator is
TL494, the 6th and the 7th capacitor are electrolytic capacitor.
3. a kind of self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that: the frequency control unit packet
Digital regulation resistance and the 15th capacitor are included, wherein the digital regulation resistance is MCP41010.
4. a kind of self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that: the intensity control unit packet
Include the second rheostat, the 16th capacitor, the 17th capacitor, the 23rd resistance and the 24th resistance.
5. a kind of self-adapting ultrasonic tooth-cleaning machine according to claim 1, it is characterised in that: the power amplification unit packet
Include high frequency transformer, the first field-effect tube, the second field-effect tube and the 25th~the 28th resistance.
6. a kind of 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 capacitor, wherein the operational amplifier
For MCP602.
7. a kind of 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 |
|---|---|---|---|
| CN201721313994.8U CN208741185U (en) | 2017-10-12 | 2017-10-12 | A kind of self-adapting ultrasonic tooth-cleaning machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721313994.8U CN208741185U (en) | 2017-10-12 | 2017-10-12 | A kind of self-adapting ultrasonic tooth-cleaning machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208741185U true CN208741185U (en) | 2019-04-16 |
Family
ID=66049824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721313994.8U Expired - Fee Related CN208741185U (en) | 2017-10-12 | 2017-10-12 | A kind of self-adapting ultrasonic tooth-cleaning machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208741185U (en) |
-
2017
- 2017-10-12 CN CN201721313994.8U patent/CN208741185U/en not_active Expired - Fee Related
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190416 Termination date: 20191012 |
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| CF01 | Termination of patent right due to non-payment of annual fee |