CN108649945A - A kind of vibratory drive circuit - Google Patents
A kind of vibratory drive circuit Download PDFInfo
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- CN108649945A CN108649945A CN201810553433.8A CN201810553433A CN108649945A CN 108649945 A CN108649945 A CN 108649945A CN 201810553433 A CN201810553433 A CN 201810553433A CN 108649945 A CN108649945 A CN 108649945A
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- 238000003825 pressing Methods 0.000 claims abstract description 31
- 230000002463 transducing effect Effects 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 230000005284 excitation Effects 0.000 claims abstract description 9
- 239000000919 ceramic Substances 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 10
- 230000008901 benefit Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910052573 porcelain Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 210000001367 artery Anatomy 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
- 239000012776 electronic material Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 210000003739 neck Anatomy 0.000 description 1
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- 230000008054 signal transmission Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/964—Piezoelectric touch switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
- H03K2217/96—Touch switches
- H03K2217/96062—Touch switches with tactile or haptic feedback
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Abstract
The present invention provides a kind of vibratory drive circuits, belong to piezoceramic transducer detection technique field.The vibratory drive circuit includes Piezoceramic press key, button transducing signal recognition unit, signal processing unit, impulse generating unit and pulse driver unit, button transducing signal recognition unit carries out processing acquisition pressing to the pressing signal that Piezoceramic press key transmits and judges signal, the signal processing chip of signal processing unit control impulse generating unit when receiving pressing and judging signal generates high-voltage pulse signal, pulse driver unit carries out pulse excitation using high-voltage pulse signal under the control of signal processing unit to Piezoceramic press key simultaneously, so that Piezoceramic press key generates vibration, to provide accurate vibrational feedback to user, allow user that can determine whether push action is effective by perceiving vibrational feedback.
Description
Technical field
The present invention relates to piezoceramic transducer detection technique fields, in particular to a kind of vibratory drive circuit.
Background technology
With the continuous improvement of electronic manufacturing technology, microelectronic device just quickly enters in people’s lives, and piezoelectricity is made pottery
Porcelain has a kind of ceramic material-piezoelectric effect that can convert mechanical energy and electric energy mutually, and piezoelectric ceramics, which removes, has piezoelectricity
Outside, also there is dielectricity, elasticity etc., be widely used in the necks such as medical imaging, sonic transducer, sonic transducer, ultrasonic motor
Domain.Piezoelectric ceramics has occupied sizable proportion in field of electronic materials, and is widely used in every profession and trade.Piezoelectricity
Ceramic button is based on the mechanical energy of piezoelectric ceramics and the principle that mutually converts of electric energy is being made, when by mechanical stress
Effect or when sensing vibration signal, voltage signal output will be had between two electrode surface of piezoelectric ceramics；Conversely, making pottery to piezoelectricity
When porcelain applies electric signal, it can also convert the electrical signal to vibration signal.Existing touch key-press is all that can only believe button
Number carry out signal output, the button operation of user cannot be fed back, cannot allow user that can accurately experience is
It is no complete to press successfully.
Invention content
The purpose of the present invention is to provide a kind of vibratory drive circuits, to improve the above-mentioned problems of the prior art.
What the embodiment of the present invention was realized in：
The present invention provides a kind of vibratory drive circuit, the vibratory drive circuit includes Piezoceramic press key, button biography
Feel signal identification unit, signal processing unit, impulse generating unit and pulse driver unit.The Piezoceramic press key is by outer
Power generates pressing signal when generating deformation.The button transducing signal recognition unit is connect with the Piezoceramic press key, to institute
State pressing signal carry out voltage reference raise and relevant signal processing after obtain pressing judge signal.The signal processing unit
Including signal processing chip, the signal processing chip connect with the button transducing signal recognition unit and is based on the pressing
Judge that signal obtains pulse and generates signal.The impulse generating unit is connect with the signal processing unit, described receiving
Pulse generates high-voltage pulse signal when generating signal.The pulse driver unit and the impulse generating unit and the signal
Processing unit connects, using the high-voltage pulse signal to the Piezoceramic press key under the control of the signal processing unit
Pulse excitation is carried out, so that the Piezoceramic press key generates vibration.
In optional embodiment of the present invention, the button transducing signal recognition unit include the first capacitance, the second capacitance,
Third capacitance, first resistor, second resistance and the first diode, the first end ground connection of first capacitance, first capacitance
Second end connect respectively with the first end of the common ground pin of the Piezoceramic press key and second capacitance, described
The first end of two capacitances also respectively with the reference voltage pin of the signal processing chip and the anode of first diode
The cathode of connection, first diode passes through the concatenated first resistor, the second resistance and second capacitance
Second end connects, the second end of second capacitance also respectively with the first end of the third capacitance and the signal processing core
The second pin of piece connects, the second end of the third capacitance respectively with the high drive pin of the Piezoceramic press key and
Detect pin connection.
In optional embodiment of the present invention, the button transducing signal recognition unit further includes 3rd resistor, the 4th electricity
Resistance, the 5th resistance and the 6th resistance, the first end of the 3rd resistor are connect with the second end of first capacitance, the third
The second end of resistance respectively with one end of second capacitance, positive and described 4th resistance of first diode
One end connects, and the second end of the 4th resistance is connect with the reference voltage pin of the signal processing chip, the 5th electricity
Resistance is connected in parallel between the second end of positive and described first resistor of first diode, and the 6th resistor coupled in parallel is described
Between the second end of first resistor and the high drive pin of the Piezoceramic press key.
In optional embodiment of the present invention, the button transducing signal recognition unit further includes the 7th resistance, and described
The first end of seven resistance is connect with the high drive pin of the Piezoceramic press key, the second end of the 7th resistance with it is described
6th resistance connects.
In optional embodiment of the present invention, the signal processing unit further includes the 4th capacitance, the 8th resistance and the 9th
Resistance, the first pin of the signal processing chip are connect with the first end of the 8th resistance, and the second of the 8th resistance
End is connect with the first end of the first end of the 9th resistance and the 4th capacitance respectively, the second end of the 9th resistance
It is connect with an external power supply, the second end ground connection of the 4th capacitance.
In optional embodiment of the present invention, the signal processing unit further includes the 5th capacitance, the signal processing core
6th pin of piece is connect with the first end of the 5th capacitance, the second end ground connection of the 5th capacitance.
In optional embodiment of the present invention, the impulse generating unit includes the first inductance, the second diode, the one or three
Pole pipe, the second triode, the 6th capacitance and the 7th capacitance, the first end of first inductance respectively with the signal processing core
17th pin of piece and external power supply connection, the second end of first inductance respectively with second diode just
The collector of pole and first triode connects, the cathode of second diode respectively with the 6th capacitance first
The collector connection at end, the first end of the 7th capacitance and second triode, the base stage point of second triode
It is not connect with the emitter of the tenth pin of the signal processing chip and second triode, first triode
Base stage is connect with the emitter of the 25th pin of the signal processing chip and first triode respectively, and described
The emitter of one triode is also connect with the second end of the second end of the 6th capacitance and the 7th capacitance respectively.
In optional embodiment of the present invention, the 6th capacitance is polar capacitor, the anode of the 6th capacitance and institute
The cathode connection of the second diode is stated, the cathode of the 6th capacitance is connect with the emitter of first triode.
In optional embodiment of the present invention, the pulse driver unit includes third transistor, the 4th triode and
Three diodes, the base stage of the third transistor respectively with the 16th pin of the signal processing chip and the described 3rd 3
The emitter of pole pipe connects, the collector of the third transistor base stage and the described 4th with the 4th triode respectively
The emitter of triode connects, and the emitter of the 4th triode is also connect with the cathode of the third diode, and described three
The anode of diode connects with the high drive pin of the collector of the 4th triode and the Piezoceramic press key respectively
It connects.
In optional embodiment of the present invention, the pulse driver unit further includes the tenth resistance, eleventh resistor, the tenth
The first end of two resistance and thirteenth resistor, the tenth resistance is connect with the 16th pin of the signal processing chip, institute
The second end for stating the tenth resistance is connect with the base stage of the first end of the eleventh resistor and the third transistor respectively, institute
The second end for stating eleventh resistor is connect with the emitter of the third transistor, and the twelfth resistor is connected on the third
Between the collector of triode and the base stage of the 4th triode, the thirteenth resistor is connected on the 4th triode
Between base stage and emitter.
The advantageous effect of the embodiment of the present invention is：
An embodiment of the present invention provides a kind of vibratory drive circuit, Piezoceramic press key is generated when being generated deformation by external force
Signal is pressed, the pressure conversion that the Piezoceramic press key is received is electric signal, to make button transducing signal recognition unit
It can judge whether Piezoceramic press key is pressed by simple electrical signal detection, keep pressing detection process electrified, automatic
Change and convenient and efficient；Signal processing unit carries out the information of other units and electrical equipment in the vibratory drive circuit
Centralized processing greatly improves the reaction speed and reaction order of accuarcy of vibratory drive circuit；Pulse driver unit is described
Pulse is carried out to the Piezoceramic press key using the high-voltage pulse signal of impulse generating unit under the control of signal processing unit
Excitation makes it generate vibration, provides accurate feedback signal for user, lets the user know that whether button operation is effective
Operation, improves the button service efficiency of user.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Shown in attached drawing, above and other purpose of the invention, feature and advantage will be more clear, in whole attached drawings
Identical reference numeral indicates identical part, does not press actual size equal proportion scaling deliberately and draws attached drawing, it is preferred that emphasis is shows
Go out the purport of the present invention.
Fig. 1 is a kind of module diagram of vibratory drive circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of circuit diagram of button transducing signal recognition unit provided in an embodiment of the present invention；
Fig. 3 is a kind of circuit diagram of signal processing unit provided in an embodiment of the present invention；
Fig. 4 is a kind of circuit diagram of impulse generating unit provided in an embodiment of the present invention；
Fig. 5 is a kind of circuit diagram of pulse driver unit provided in an embodiment of the present invention.
Icon：10- vibratory drive circuits；11- Piezoceramic press keys；12- button transducing signal recognition units；13-
Signal processing unit；14- impulse generating units；15- pulse driver units.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, below the detailed description of the embodiment of the present invention to providing in the accompanying drawings be not intended to limit it is claimed
The scope of the present invention, but be merely representative of the present invention selected embodiment.Based on the embodiments of the present invention, this field is common
The every other embodiment that technical staff is obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In the description of the present invention, it should be noted that the orientation or positional relationship of the instructions such as term "inner", "outside" is base
In orientation or positional relationship shown in the drawings or the invention product using when the orientation or positional relationship usually put, only
It is that for convenience of description of the present invention and simplification of the description, not indicating or implying the indicated device or element must have specifically
Orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, term " first ", " the
Two " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
In addition, the terms such as term "horizontal", "vertical" are not offered as requiring component abswolute level or pendency, but can be slightly
Low dip.It is not to indicate that the structure has been had to if "horizontal" refers to only that its direction is more horizontal with respect to for "vertical"
It is complete horizontal, but can be slightly tilted.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, can also be electrical connection；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned term with concrete condition
Concrete meaning in the present invention.
Other features and advantages of the present invention will be illustrated in subsequent specification, also, partly be become from specification
It is clear that being understood by implementing the embodiment of the present invention.The purpose of the present invention and other advantages can be by being write
Specifically noted structure is realized and is obtained in specification, claims and attached drawing.
Through the application the study found that push button signalling can only be carried out signal output by current touch key-press, without similar
The vibration prompt of mechanical key cannot provide more accurate button feedback signal, and the prior art is mainly machinery by key technology
Button and touch key-press two major classes, mechanical key are by metal contact and the non-contact break-make come control circuit, touch key-press
Be divided into resistive touch button and capacitance touch button, but these three button schemes all have some drawbacks, have some occasions without
Method meets application, and specific drawback is：Mechanical key is due to being mechanical movement, so will produce some abrasions, final button loses
Effect；Both touch key-press all cannot be satisfied the information feedback of single button, and making pressing person's (finger of such as people) that can not confirm is
It is no to have by key pressing；The remolding sensitivity of resistance button is relatively low, and button point easy tos produce drift and loses keypress function；Capacitance button
It is based on when having hand close to button, the capability value of capacitance is changed to detect on button, has more than water in kitchen, toilet
Place will produce accidentally by or button malfunction state, under water capacitance touch button can not then use completely.It is above-mentioned in order to solve
Problem, an embodiment of the present invention provides a kind of vibratory drive circuits 10.
Referring to FIG. 1, Fig. 1 is a kind of module diagram of vibratory drive circuit provided in an embodiment of the present invention.
Vibratory drive circuit 10 includes Piezoceramic press key 11, button transducing signal recognition unit 12, signal processing unit
13, impulse generating unit 14 and pulse driver unit 15.Piezoceramic press key 11 generates pressing letter when being generated deformation by external force
Number；Button transducing signal recognition unit 12 is connect with Piezoceramic press key 11, and carrying out voltage reference to the pressing signal raises
And it obtains pressing after relevant signal processing and judges signal；Signal processing unit 13 includes signal processing chip IC1, signal processing
Chip IC 1 connect with button transducing signal recognition unit 12 and judges that signal obtains pulse and generates signal based on the pressing；Arteries and veins
Punching generates unit 14 and is connect with signal processing unit 13, and high-voltage pulse signal is generated when receiving the pulse and generating signal；
Pulse driver unit 15 is connect with impulse generating unit 14 and signal processing unit 13, under the control of signal processing unit 13
Pulse excitation is carried out to Piezoceramic press key 11 using the high-voltage pulse signal, so that Piezoceramic press key 11 generates vibration.
Wherein, mechanical wear is not present in Piezoceramic press key 11, and push button longevity is than mechanical key field, simultaneously because piezoelectricity is made pottery
Porcelain button 11 is the variation for itself generating deformation and generating charge, and small charge variation can be detected by processor, so
Sensitivity can be very high.In addition to this, since Piezoceramic press key 11 is the variation for itself generating deformation and generating charge, with the external world
Environment does not have any relationship, it is possible to which equal conductive occasion uses under water.As an implementation, the pressure in the present embodiment
Electroceramics button 11 includes high drive pin/detection pin and common ground pin, the high drive pin and pulse
Driving unit 15 connects so that Piezoceramic press key 11 generates vibration, the detection pin and button under the driving of pulse signal
Transducing signal recognition unit 12 connects so that the pressing signal that Piezoceramic press key 11 generates when by external force generation deformation can
It is transmitted to button transducing signal recognition unit 12.
Referring to FIG. 2, Fig. 2 is a kind of circuit diagram of button transducing signal recognition unit provided in an embodiment of the present invention.
Button transducing signal recognition unit 12 is connect with Piezoceramic press key 11, for what is generated to Piezoceramic press key 11
Pressing signal carry out voltage reference raise and relevant signal processing after obtain pressing judge signal.The identification of button transducing signal is single
Member 12 includes the first capacitance C1, the second capacitance C2, third capacitance C3, first resistor R1, second resistance R2 and the first diode D1,
The first end of first capacitance C1 is grounded, and the second end of the first capacitance C1 is drawn with the common ground of Piezoceramic press key 11 respectively
The first end of foot and the second capacitance C2 connect, and the first end of the second capacitance C2 is also electric with the benchmark of signal processing chip IC1 respectively
Pin (the 4th pin) and the anode connection of the first diode D1, the cathode of the first diode D1 is pressed to pass through concatenated first electricity
Resistance R1, second resistance R2 are connect with the second end of the second capacitance C2, the second end of the second capacitance C2 also respectively with third capacitance C3
First end and signal processing chip IC1 second pin connection, the second end of third capacitance C3 makes pottery with the piezoelectricity respectively
The high drive pin of porcelain button 11 and detection pin connection.
As an optional implementation manner, button transducing signal recognition unit 12 further includes 3rd resistor R3, the 4th electricity
Resistance R4, the 5th resistance R5 and the 6th resistance R6, the first end of 3rd resistor R3 are connect with the second end of the first capacitance C1, third electricity
The second end for hindering R3 connects with the first end of one end of the second capacitance C2, the anode of the first diode D1 and the 4th resistance R4 respectively
It connects, the second end of the 4th resistance R4 is connect with the reference voltage pin of signal processing chip IC1, and the 5th resistance R5 is connected in parallel on first
Between the anode and the second end of first resistor R1 of diode D1, the 6th resistance R6 be connected in parallel on first resistor R1 second end and
Between the high drive pin of Piezoceramic press key 11.
Optionally, button transducing signal recognition unit 12 further includes the 7th resistance R7, the first end and pressure of the 7th resistance R7
The high drive pin of electroceramics button 11 connects, and the second end of the 7th resistance R7 is connect with the 6th resistance R6.
Further, button transducing signal recognition unit 12 can also include switching diode D4, switching diode D4's
Anode is connect with the second end of the second capacitance C2, cathode ground connection.
Referring to FIG. 3, Fig. 3 is a kind of circuit diagram of signal processing unit provided in an embodiment of the present invention.
Signal processing unit 13 respectively with button transducing signal recognition unit 12, impulse generating unit 14 and pulsed drive
Unit 15 connects.Signal processing unit 13 is used to judge that signal judges based on the pressing that button transducing signal recognition unit 12 transmits
Whether Piezoceramic press key 11 is depressed, and sends arteries and veins to impulse generating unit 14 when Piezoceramic press key 11 is depressed
Punching generates signal so that the generation high-voltage pulse signal of impulse generating unit 14, is additionally operable to described in the control utilization of pulse driver unit 15
High-voltage pulse signal carries out pulse excitation to Piezoceramic press key 11, so that Piezoceramic press key 11 generates vibration.Signal processing
Unit 13 include signal processing chip IC1 and its peripheral circuit, the peripheral circuit include the 4th capacitance C4, the 8th resistance R8 and
The first pin of 9th resistance R9, signal processing chip IC1 are connect with the first end of the 8th resistance R8, and the second of the 8th resistance R8
End is connect with the first end of the first end of the 9th resistance R9 and the 4th capacitance C4 respectively, outside the second end and one of the 9th resistance R9
Connect power supply connection, the second end ground connection of the 4th capacitance C4.
As an implementation, the signal processing unit 13 in the present embodiment further includes the 5th capacitance C5, signal processing
6th pin of chip IC 1 is connect with the first end of the 5th capacitance C5, the second end ground connection of the 5th capacitance C5.
Signal processing chip IC1 can be a kind of IC chip, the processing capacity with signal.At above-mentioned signal
It can be at general processor, including central processing unit (Central Processing Unit, CPU), network to manage chip IC 1
Manage device (Network Processor, NP) etc.；It can also be digital signal processor (Digital Signal
Processing, DSP), it is application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), existing
At programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete
Door or transistor logic, discrete hardware components.The general processor can be microprocessor or any conventional
Processor.In this present embodiment, optionally, signal processing chip IC1 can be the processor of STM32 series, such as
The models such as STM32F103C8T6, STM32F103VET6.Specifically, as an implementation, at the signal in the present embodiment
The chip that chip IC 1 is PCI18F2480 models is managed, 28 foot SPDIP, 28 foot SOIC, 28 foot QFN encapsulation are used；
PIC18F2480 is a kind of 8 FLASH micro controllers, on piece carry 32K programmings space, 1536bytes SRAM and
256bytesEEPROM, while there are mW grades of Low-power Technologies, the operating current of lower 0.2 μ A of consumption of sleep pattern；On piece is certainly
It can reach the processing speed of 32MHz with system clock, external crystal-controlled oscillation can be substituted completely, simplify board design；Additionally carry
Complicated software command operation is changed to the assignment to related register, simplified by a variety of peripheral resources such as SPI, USART, TIMER
Design process；In terms of software debugging and programming, need to only occupy 4 I/O pins can complete the download of program and online
Debugging greatly reduces the time spent in bottom hardware debugging.Optionally, the signal processing chip IC1 in the present embodiment is also
It can be the upgrade version i.e. chip of model PIC18F25K80 of PCI18F2480.
Referring to FIG. 4, Fig. 4 is a kind of circuit diagram of impulse generating unit provided in an embodiment of the present invention.
Impulse generating unit 14 is connect with signal processing unit 13 and pulse driver unit 15 respectively, at signal
High-voltage pulse signal is generated under the control for the pulse generation signal that reason unit 13 transmits and passes the high-voltage pulse signal
Transport to pulse driver unit 15.The concrete principle of impulse generating unit 14 is：It is generated by inductance and triode (metal-oxide-semiconductor)
The high-voltage pulse of one suitable Piezoceramic press key 11 can control the vibration of piezoelectric ceramic piece by pulse driver unit 15,
And high-voltage pulse charge is quickly released by the second triode Q2, and then piezoelectric ceramic piece is made to generate quick deformation, it generates more
Strong seismaesthesia.Therefore requirement of the vibratory drive circuit 10 in the embodiment of the present invention to environmental variance is low, and accuracy rate is high, will not go out
Existing touch screen time length is due to accumulation or ambient temperature and humidity changes and the insensitive phenomenon of appearance touch.
Impulse generating unit 14 include the first inductance L1, the second diode D2, the first triode Q1, the second triode Q2,
The first end of 6th capacitance C6 and the 7th capacitance C7, the first inductance L1 respectively with the 17th pin of signal processing chip IC1
And external power supply (can be a 12V) connection, the second end of the first inductance L1 respectively with the anode of the second diode D2 and the
The collector of one triode D1 connects, the cathode of the second diode D2 respectively with the first end of the 6th capacitance C6, the 7th capacitance C7
First end and the second triode Q2 collector connection, the base stage of the second triode Q2 respectively with signal processing chip IC1
The tenth pin and the second triode Q2 emitter connection, the base stage of the first triode Q1 respectively with signal processing chip
The connection of the emitter of the 25th pin of IC1 and the first triode Q1, the emitter of the first triode Q1 is also respectively with the
The second end of six capacitance C6 and the second end connection of the 7th capacitance C7.Optionally, the 6th capacitance C6 is polar capacitor, the 6th electricity
The first end for holding C6 is anode, and second end is cathode.
Referring to FIG. 5, Fig. 5 is a kind of circuit diagram of pulse driver unit provided in an embodiment of the present invention.
Pulse driver unit 15 connects with Piezoceramic press key 11, signal processing unit 13 and impulse generating unit 14 respectively
It connects.Pulse driver unit 15 is used to utilize impulse generating unit 14 after the closing of circuit signal for receiving signal processing unit 13
The high-voltage pulse signal of generation carries out pulse excitation to Piezoceramic press key 11.As an alternative embodiment, pulse is driven
Moving cell 15 includes third transistor Q3, the 4th triode Q4 and third diode D3, the base stage of third transistor Q3 respectively with
The emitter connection of the 16th pin and third transistor Q3 of signal processing chip IC1, the collector of third transistor Q3
Connect respectively with the emitter of the base stage of the 4th triode Q4 and the 4th triode Q4, the emitter of the 4th triode Q4 also with
The cathode of third diode D3 connects, the positive collector and piezoelectric ceramics with the 4th triode Q4 respectively of three diode D3
The high drive pin of button 11 connects.
Further, as an alternative embodiment, pulse driver unit 15 further includes the tenth resistance R10, the tenth
The first end of one resistance R11, twelfth resistor R12 and thirteenth resistor R13, the tenth resistance R10 are with signal processing chip IC1's
16th pin connects, the second end of the tenth resistance R10 respectively with the first end of eleventh resistor R11 and third transistor Q3
Base stage connection, the second end of eleventh resistor R11 connect with the emitter of third transistor Q3, and twelfth resistor R12 connects
Between the collector and the base stage of the 4th triode Q4 of third transistor Q3, thirteenth resistor R13 is connected on the 4th triode
Between the base stage and emitter of Q4.
The operation principle of vibratory drive circuit 10 provided in an embodiment of the present invention is：
Operator presses Piezoceramic press key 11, and Piezoceramic press key 11 generates pressing when by pressed by external force
Signal and by the pressing signal transmission to button transducing signal recognition unit 12, button transducing signal recognition unit 12 is to described
Pressing signal carry out voltage reference raise and relevant signal processing after obtain pressing judge signal and by the pressing judgement letter
It number is transmitted to signal processing unit 13, signal processing unit 13 judges that signal judges operator whether to piezoelectricity according to the pressing
Ceramic button 11 completes effective pressing operation, and when to be, signal processing unit 13 sends out pulse production to impulse generating unit 14
For raw signal so that impulse generating unit 14 generates high-voltage pulse signal, synchronous signal processing unit 13 controls pulse driver unit 15
Closure switch carry out pulse excitation, so that Piezoceramic press key 11 using the high-voltage pulse signal to Piezoceramic press key 11
Generate vibrational feedback.
In conclusion an embodiment of the present invention provides a kind of vibratory drive circuit, Piezoceramic press key is generated by external force
Pressing signal is generated when deformation, the pressure conversion that the Piezoceramic press key is received is electric signal, to make button sensing letter
Number recognition unit can judge whether Piezoceramic press key is pressed by simple electrical signal detection, keep pressing detection process electric
Gasify, automate and is convenient and efficient；Signal processing unit is to other units and electrical equipment in the vibratory drive circuit
Information focused on, greatly improve vibratory drive circuit reaction speed and reaction order of accuarcy；Pulsed drive
Unit presses the piezoelectric ceramics using the high-voltage pulse signal of impulse generating unit under the control of the signal processing unit
Key, which carries out pulse excitation, makes it generate vibration, provides accurate feedback signal for user, lets the user know that button operation
Whether it is effectively to operate, improves the button service efficiency of user.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of vibratory drive circuit, which is characterized in that the vibratory drive circuit includes：
Piezoceramic press key generates pressing signal when being generated deformation by external force；
Button transducing signal recognition unit, connect with the Piezoceramic press key, and voltage reference lift is carried out to the pressing signal
Pressing is obtained after high and relevant signal processing judges signal；
Signal processing unit, including signal processing chip, the signal processing chip and the button transducing signal recognition unit
It connects and is based on the pressing and judge that signal obtains pulse and generates signal；
Impulse generating unit is connect with the signal processing unit, and high-tension pulse is generated when receiving the pulse and generating signal
Rush signal；
Pulse driver unit is connect with the impulse generating unit and the signal processing unit, in the signal processing list
Pulse excitation is carried out to the Piezoceramic press key using the high-voltage pulse signal under the control of member, so that the piezoelectric ceramics
Button generates vibration.
2. vibratory drive circuit according to claim 1, which is characterized in that the button transducing signal recognition unit includes
First capacitance, the second capacitance, third capacitance, first resistor, second resistance and the first diode, the first end of first capacitance
Ground connection, the second end of first capacitance respectively with the common ground pin of the Piezoceramic press key and second capacitance
First end connects, the first end of second capacitance also respectively with the reference voltage pin of the signal processing chip and described
The anode connection of first diode, the cathode of first diode pass through the concatenated first resistor, the second resistance
Connect with the second end of second capacitance, the second end of second capacitance also respectively with the first end of the third capacitance with
And the second pin connection of the signal processing chip, the second end of the third capacitance respectively with the Piezoceramic press key
High drive pin and detection pin connection.
3. vibratory drive circuit according to claim 2, which is characterized in that the button transducing signal recognition unit also wraps
Include 3rd resistor, the 4th resistance, the 5th resistance and the 6th resistance, the of the first end of the 3rd resistor and first capacitance
Two ends connect, the second end of the 3rd resistor respectively with the anode of one end of second capacitance, first diode with
And the first end connection of the 4th resistance, the second end and the reference voltage of the signal processing chip of the 4th resistance are drawn
Foot connects, and the 5th resistor coupled in parallel is described between the second end of the positive and described first resistor of first diode
6th resistor coupled in parallel is between the second end of the first resistor and the high drive pin of the Piezoceramic press key.
4. vibratory drive circuit according to claim 3, which is characterized in that the button transducing signal recognition unit also wraps
The 7th resistance is included, the first end of the 7th resistance is connect with the high drive pin of the Piezoceramic press key, and the described 7th
The second end of resistance is connect with the 6th resistance.
5. vibratory drive circuit according to claim 1, which is characterized in that the signal processing unit further includes the 4th electricity
Hold, the 8th resistance and the 9th resistance, the first pin of the signal processing chip are connect with the first end of the 8th resistance, institute
The second end for stating the 8th resistance is connect with the first end of the first end of the 9th resistance and the 4th capacitance respectively, described
The second end of 9th resistance is connect with an external power supply, the second end ground connection of the 4th capacitance.
6. vibratory drive circuit according to claim 5, which is characterized in that the signal processing unit further includes the 5th electricity
Hold, the 6th pin of the signal processing chip is connect with the first end of the 5th capacitance, the second end of the 5th capacitance
Ground connection.
7. vibratory drive circuit according to claim 1, which is characterized in that the impulse generating unit includes the first electricity
Sense, the second diode, the first triode, the second triode, the 6th capacitance and the 7th capacitance, the first end of first inductance
It is connect respectively with the 17th pin of the signal processing chip and an external power supply, the second end difference of first inductance
It is connect with the collector of positive and described first triode of second diode, the cathode difference of second diode
It is connect with the first end of the 6th capacitance, the first end of the 7th capacitance and the collector of second triode, institute
State the base stage of the second triode respectively with the tenth pin of the signal processing chip and the emitter of second triode
Connection, the base stage of first triode respectively with the 25th pin of the signal processing chip and the one or three pole
The emitter of pipe connects, the emitter of the first triode also second end and the described 7th with the 6th capacitance respectively
The second end of capacitance connects.
8. vibratory drive circuit according to claim 7, which is characterized in that the 6th capacitance is polar capacitor, described
The anode of 6th capacitance is connect with the cathode of second diode, cathode and first triode of the 6th capacitance
Emitter connects.
9. vibratory drive circuit according to claim 1, which is characterized in that the pulse driver unit includes the three or three pole
Pipe, the 4th triode and third diode, the base stage of the third transistor respectively with the signal processing chip the 16th
Pin and the connection of the emitter of the third transistor, the collector of the third transistor respectively with the 4th triode
Base stage and the 4th triode emitter connection, the emitter of the 4th triode also with the third diode
Cathode connection, three diode anode respectively with the collector of the 4th triode and the Piezoceramic press key
High drive pin connection.
10. vibratory drive circuit according to claim 9, which is characterized in that the pulse driver unit further includes the tenth
Resistance, eleventh resistor, twelfth resistor and thirteenth resistor, first end and the signal processing chip of the tenth resistance
The connection of the 16th pin, the second end of the tenth resistance respectively with the first end of the eleventh resistor and the third
The base stage of triode connects, and the second end of the eleventh resistor is connect with the emitter of the third transistor, and the described tenth
Two resistance are connected between the collector of the third transistor and the base stage of the 4th triode, the thirteenth resistor string
It is associated between the base stage and emitter of the 4th triode.
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| CN201810553433.8A CN108649945A (en) | 2018-05-31 | 2018-05-31 | A kind of vibratory drive circuit |
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| CN201810553433.8A CN108649945A (en) | 2018-05-31 | 2018-05-31 | A kind of vibratory drive circuit |
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| CN112332694A (en) * | 2020-10-27 | 2021-02-05 | 西安工程大学 | Piezoelectric ceramic drive circuit |
| CN113346807A (en) * | 2021-07-16 | 2021-09-03 | 重庆大学 | Two-phase stepping motor drive control circuit for deep sea electric cradle head |
| CN113794471A (en) * | 2021-09-10 | 2021-12-14 | 厦门科牧智能技术有限公司 | Circuit and method for delaying key corrosion and control handle |
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| CN113346807A (en) * | 2021-07-16 | 2021-09-03 | 重庆大学 | Two-phase stepping motor drive control circuit for deep sea electric cradle head |
| CN113346807B (en) * | 2021-07-16 | 2023-01-31 | 重庆大学 | Two-phase stepping motor drive control circuit for deep sea electric pan-tilt |
| CN113794471A (en) * | 2021-09-10 | 2021-12-14 | 厦门科牧智能技术有限公司 | Circuit and method for delaying key corrosion and control handle |
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