CN208741184U - 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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- CN208741184U CN208741184U CN201721313956.2U CN201721313956U CN208741184U CN 208741184 U CN208741184 U CN 208741184U CN 201721313956 U CN201721313956 U CN 201721313956U CN 208741184 U CN208741184 U CN 208741184U
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Abstract
The utility model provides a kind of low-temperature-rise 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 switching power supply.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, the dirts such as tartar and calculus dentalis can be removed well, achieve the effect that beautiful tooth, and the fever of power unit is reduced as power supply using Switching Power Supply, built-in temperature is low, extends service life.
Description
Technical field
The utility model relates to medical shaping and beauty equipment technical field, in particular to a kind of low-temperature-rise self-adapting ultrasonic
Tooth-cleaning 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.
And power is 10~20W to ultrasonic cavitron in normal work, it is desirable that in the wide-voltage range of 180~250V
Interior work, therefore general power supply can generate amount of heat when ultrasonic cavitron works, and cause built-in temperature excessively high, it is long
Time service be easy to cause system job insecurity.
Utility model content
(1) the technical issues of solving
To solve the above-mentioned problems, the utility model provides a kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine, can be automatic
Scanning search optimum resonance point, resonance frequency and oscillation intensity number lock, resonance point drift is minimum, and work efficiency is high, reduces
Power unit fever, improves stability and reliability, extends service life.
(2) technical solution
A kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine, including the control of MPU microprocessor unit, oscillating unit, frequency are single
Member, intensity control unit, power amplification unit, current sample feedback unit, mechanical vibration element and switching power supply；It is described
Oscillating unit generates the controllable pulse of recommending of duty ratio under MPU microprocessor unit control and exports, 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 duty ratio and frequency of the oscillator signal of generation are controlled by the MPU microprocessor unit, 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
It states switching power supply to power to other each units, and limits output voltage and electric current, reduce power unit fever.
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.
Further, the switching power supply includes current rectifying and wave filtering circuit, DC-DC conversion circuit and voltage regulator circuit；Institute
Stating current rectifying and wave filtering circuit includes the first inductance, the second inductance, rectifier, the 18th capacitor and the 19th capacitor, and the DC-DC becomes
Changing circuit includes DC-DC converter, third inductance, third diode, the 20th~the 23rd capacitor and the 29~the
31 resistance, the voltage regulator circuit include LDO voltage stabilizer, the 4th inductance, the second light emitting diode, the 24th~the 20th
Seven capacitors and the 32nd resistance.
Further, the DC-DC converter be MC34063, the LDO voltage stabilizer be LM7805, the described 20th,
24th and the 27th capacitor is electrolytic capacitor.
(3) beneficial effect
The utility model provides a kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine, can automatically scanning search optimum resonance
Point, resonance frequency and oscillation intensity number lock, resonance point drift is minimum, and work efficiency is high, improves stability and reliability,
The dirts such as tartar and calculus dentalis can be removed well, achieve the effect that beautiful tooth, and using Switching Power Supply as power supply,
Reduce the fever of power unit, built-in temperature is low, extends service life.
Detailed description of the invention
Fig. 1 is a kind of system structure diagram of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine involved in the utility model.
Fig. 2 is a kind of MPU microprocessor unit of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine involved in the utility model
Circuit diagram.
Fig. 3 is a kind of oscillating unit circuit theory of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine involved in the utility model
Figure.
Fig. 4 is a kind of frequency control unit circuit theory of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine according to the present invention
Figure.
Fig. 5 is a kind of intensity control unit circuit of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine involved in the utility model
Schematic diagram.
Fig. 6 is a kind of power amplification unit circuit of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine involved in the utility model
Schematic diagram.
Fig. 7 is a kind of current feedback sampling unit of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine involved in the utility model
Circuit diagram.
Fig. 8 is a kind of switching power supply circuit of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine involved in the utility model
Schematic diagram.
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 low-temperature-rise 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 switch electricity
Source unit；Oscillating unit generates the controllable pulse of recommending of duty ratio under the control of MPU microprocessor unit and exports, and micro- by MPU
Processor unit sends data to the frequency of oscillation of frequency control unit control oscillating unit, the oscillation letter for generating oscillating unit
Number duty ratio and frequency controlled by MPU microprocessor unit, oscillator signal after power amplification unit amplifies driving machine tool shake
Sonic oscillation electric signal is converted into ultrasonic mechanical vibration signal by moving cell, which can remove well
The dirts such as tartar and calculus dentalis, to achieve the effect that beautiful tooth, switching power supply is powered to other each units, and is limited
Output voltage and electric current reduce power unit fever.
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.
As shown in figure 8, switching power supply includes current rectifying and wave filtering circuit, DC-DC conversion circuit and voltage regulator circuit；Rectification filter
Wave circuit includes inductance L1, inductance L2, rectifier D2, capacitor C18 and capacitor C19, and DC-DC conversion circuit includes DC-DC transformation
Device U6, inductance L3, diode D3, capacitor C20~C23 and resistance R29~R31, voltage regulator circuit include LDO voltage stabilizer U7, inductance
L4, Light-emitting diode LED 2, capacitor C24~C27 and resistance R32.Wherein, DC-DC converter U6 is MC34063, LDO voltage stabilizer
U7 is LM7805, and capacitor C20, C24 and C27 are electrolytic capacitor.
Switching Power Supply controls chip MC34063 using the DC-DC of Motorola Inc., which has route simple, at
This cheap, high-efficient, low feature of temperature rise.Core element MC34063 is a kind of monolithic bipolar Linear integrated circuit, packet in piece
Containing temperature compensation bandgap a reference source, a duty cycle control vibrator driver and High-current output switch.Output electricity
Pressing U=(1+R2/R1) * 1.25V, current-limiting resistance R30 is 1 Ω, therefore exports electric current and be 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 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 low-temperature-rise self-adapting ultrasonic tooth-cleaning machine, can automatically scanning search optimum resonance
Point, resonance frequency and oscillation intensity number lock, resonance point drift is minimum, and work efficiency is high, improves stability and reliability,
The dirts such as tartar and calculus dentalis can be removed well, achieve the effect that beautiful tooth, and using Switching Power Supply as power supply,
Reduce the fever of power unit, built-in temperature is low, extends service life.
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 (9)
1. a kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine, it is characterised in that: including MPU microprocessor unit, 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 generates the controllable pulse of recommending of duty ratio under MPU microprocessor unit control and exports, and by
The MPU microprocessor unit sends data to the frequency of oscillation that the frequency control unit controls the oscillating unit, makes institute
The duty ratio and frequency for stating the oscillator signal of oscillating unit generation are controlled by the MPU microprocessor unit, the oscillator signal
The mechanical vibration element is driven after power amplification unit amplification, sonic oscillation electric signal is converted into ultrasonic mechanical vibration
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；
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 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 capacitor, wherein the pulsewidth modulation
Device is TL494, and the 6th and the 7th capacitor is electrolytic capacitor.
3. a kind of 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 capacitor, wherein the digital regulation resistance is MCP41010.
4. a kind of 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 capacitor, the 17th capacitor, the 23rd resistance and the 24th resistance.
5. a kind of 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 field-effect tube, the second field-effect tube and the 25th~the 28th resistance.
6. a kind of 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 capacitor, wherein the operation
Amplifier is MCP602.
7. a kind of 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.
8. a kind of 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 voltage regulator circuit；The current rectifying and wave filtering circuit includes the first inductance, the
Two inductance, rectifier, the 18th capacitor and the 19th capacitor, the DC-DC conversion circuit include DC-DC converter, third electricity
Sense, third diode, the 20th~the 23rd capacitor and the 29th~the 31st resistance, the voltage regulator circuit include
LDO voltage stabilizer, the 4th inductance, the second light emitting diode, the 24th~the 27th capacitor and the 32nd resistance.
9. a kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine according to claim 8, it is characterised in that: the DC-DC becomes
Parallel operation is MC34063, and the LDO voltage stabilizer is LM7805, and the capacitor of the described 20th, the 24th and the 27th is electrolysis electricity
Hold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721313956.2U CN208741184U (en) | 2017-10-12 | 2017-10-12 | A kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721313956.2U CN208741184U (en) | 2017-10-12 | 2017-10-12 | A kind of low-temperature-rise self-adapting ultrasonic tooth-cleaning machine |
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| CN208741184U true CN208741184U (en) | 2019-04-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 CN201721313956.2U patent/CN208741184U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Effective date of registration: 20200109 Address after: 100600 206-2, floor 2, building 10, Xindong Road, Chaoyang District, Beijing Patentee after: BEIJING JIAMEI HOSPITAL MANAGEMENT Co.,Ltd. Address before: 313000 Huzhou Economic and Technological Development Zone, Huzhou City, Zhejiang Province, Room 921, 2 Saige Digital City Patentee before: HUZHOU HUINENG ELECTROMECHANICAL TECHNOLOGY Co.,Ltd. |
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Address after: 100020 206-2, 2nd floor, building 10, Xindong Road, Chaoyang District, Beijing Patentee after: Beijing Jiamei Hospital Management Group Co.,Ltd. Address before: 100600 206-2, 2nd floor, building 10, Xindong Road, Chaoyang District, Beijing Patentee before: BEIJING JIAMEI HOSPITAL MANAGEMENT Co.,Ltd. |
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Effective date of registration: 20230807 Address after: 441000 No. 1, Fuxing Avenue East Road, Nancheng Street, Zaoyang City, Xiangyang, Hubei Province (Huigang Community, Nancheng Office) Patentee after: Hubei Ousen Medical Equipment Co.,Ltd. Address before: 100020 206-2, 2nd floor, building 10, Xindong Road, Chaoyang District, Beijing Patentee before: Beijing Jiamei Hospital Management Group Co.,Ltd. |