CN208174657U - A kind of vibratory drive circuit - Google Patents
A kind of vibratory drive circuit Download PDFInfo
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- CN208174657U CN208174657U CN201820841153.2U CN201820841153U CN208174657U CN 208174657 U CN208174657 U CN 208174657U CN 201820841153 U CN201820841153 U CN 201820841153U CN 208174657 U CN208174657 U CN 208174657U
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Abstract
The utility model provides a kind of vibratory drive circuit, belongs to piezoceramic transducer detection technique field.The vibratory drive circuit includes Piezoceramic press key, key transducing signal recognition unit, signal processing unit, impulse generating unit and pulse driver unit, key 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 to Piezoceramic press key using high-voltage pulse signal under the control of signal processing unit simultaneously, so that Piezoceramic press key generates vibration, to provide accurate vibrational feedback to user, allow user can be by perceiving vibrational feedback determines whether push action is effective.
Description
Technical field
The utility model relates to piezoceramic transducer detection technique fields, in particular to a kind of vibratory drive electricity
Road.
Background technique
With the continuous improvement of electronic manufacturing technology, microelectronic device is just quickly entered in people's lives, and piezoelectricity is made pottery
Porcelain has a kind of ceramic material-piezoelectric effect that can convert mutually mechanical energy and electric energy, and piezoelectric ceramics, which removes, has piezoelectricity
Outside, also there is dielectricity, elasticity etc., be widely used in the neck such as medical imaging, sonic transducer, sonic transducer, ultrasonic motor
Domain.Piezoelectric ceramics has occupied sizable specific gravity in field of electronic materials, and is widely used in every profession and trade.Piezoelectricity
Ceramic key is based on the mechanical energy of piezoelectric ceramics and the principle that mutually converts of electric energy is being made into, 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 key
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.
Utility model content
The purpose of this utility model is to provide a kind of vibratory drive circuit, to improve above-mentioned of the existing technology ask
Topic.
What the embodiments of the present invention were realized in：
The utility model provides a kind of vibratory drive circuit, the vibratory drive circuit include Piezoceramic press key, by
Key transducing signal recognition unit, signal processing unit, impulse generating unit and pulse driver unit.The Piezoceramic press key exists
Pressing signal is generated when being generated deformation by external force.The key transducing signal recognition unit is connect with the Piezoceramic press key,
To the pressing signal carry out voltage reference raise and relevant signal processing after obtain pressing judge signal.The signal processing
Unit includes signal processing chip, and the signal processing chip connect with the key transducing signal recognition unit and is based on described
Pressing judges that signal obtains pulse and generates signal.The impulse generating unit is connect with the signal processing unit, is being received
The pulse generates high-voltage pulse signal when generating signal.The pulse driver unit and the impulse generating unit and described
Signal processing unit connection, using the high-voltage pulse signal to the piezoelectric ceramics under the control of the signal processing unit
Key carries out pulse excitation, so that the Piezoceramic press key generates vibration.
In the utility model optional embodiment, the key transducing signal recognition unit includes first capacitor, second
Capacitor, third capacitor, first resistor, second resistance and first diode, the first end ground connection of the first capacitor, described first
The second end of capacitor is connect with the first end of the common ground pin of the Piezoceramic press key and second capacitor respectively, institute
State the first end of the second capacitor also respectively with the reference voltage pin of the signal processing chip and the first diode
The cathode of anode connection, the first diode passes through the concatenated first resistor, the second resistance and second electricity
The second end of appearance connects, and the second end of second capacitor is also respectively and at the first end of the third capacitor and the signal
Manage chip second pin connection, the second end of the third capacitor respectively with the high drive pin of the Piezoceramic press key
And detection pin connection.
In the utility model optional embodiment, the key transducing signal recognition unit further includes 3rd resistor,
Four resistance, the 5th resistance and the 6th resistance, the first end of the 3rd resistor is connect with the second end of the first capacitor, described
The second end of 3rd resistor positive and described 4th resistance with one end of second capacitor, the first diode respectively
First end connection, the second end of the 4th resistance connect with the reference voltage pin of the signal processing chip, described the
Between the second end of the positive and described first resistor of the first diode, the 6th resistor coupled in parallel exists five resistor coupled in parallel
Between the second end of the first resistor and the high drive pin of the Piezoceramic press key.
In the utility model optional embodiment, the key transducing signal recognition unit further includes the 7th resistance, institute
The first end for stating the 7th resistance is connect with the high drive pin of the Piezoceramic press key, the second end of the 7th resistance with
The 6th resistance connection.
In the utility model optional embodiment, the signal processing unit further include the 4th capacitor, the 8th resistance and
9th resistance, the first pin of the signal processing chip are connect with the first end of the 8th resistance, the 8th resistance
Second end is connect with the first end of the first end of the 9th resistance and the 4th capacitor respectively, and the of the 9th resistance
Two ends are connect with an external power supply, the second end ground connection of the 4th capacitor.
In the utility model optional embodiment, the signal processing unit further includes the 5th capacitor, at the signal
6th pin of reason chip is connect with the first end of the 5th capacitor, the second end ground connection of the 5th capacitor.
In the utility model optional embodiment, the impulse generating unit includes the first inductance, the second diode, the
One triode, the second triode, the 6th capacitor and the 7th capacitor, the first end of first inductance is respectively and at the signal
Manage chip the 17th pin and an external power supply connection, the second end of first inductance respectively with second diode
Positive and described first triode collector connection, the cathode of second diode respectively with the 6th capacitor
The collector of first end, the first end of the 7th capacitor and second triode connects, the base of second triode
Pole is connect with the emitter of the tenth pin of the signal processing chip and second triode respectively, the one or three pole
The base stage of pipe is connect with the emitter of the 25th pin of the signal processing chip and first triode respectively, institute
The emitter for stating the first triode is also connect with the second end of the second end of the 6th capacitor and the 7th capacitor respectively.
In the utility model optional embodiment, the 6th capacitor is polar capacitor, the anode of the 6th capacitor
It is connect with the cathode of second diode, the cathode of the 6th capacitor is connect with the emitter of first triode.
In the utility model optional embodiment, the pulse driver unit includes third transistor, the 4th triode
With third diode, the base stage of the third transistor respectively with the 16th pin of the signal processing chip and described
The emitters of three triodes connects, the collector of the third transistor respectively with the base stage of the 4th triode and described
The emitter of 4th triode connects, and the emitter of the 4th triode is also connect with the cathode of the third diode, institute
High drive of the anode of three diodes respectively with the collector of the 4th triode and the Piezoceramic press key is stated to draw
Foot connection.
In the utility model optional embodiment, the pulse driver unit further include the tenth resistance, eleventh resistor,
Twelfth resistor and thirteenth resistor, the first end of the tenth resistance and the 16th pin of the signal processing chip connect
It connects, the second end of the tenth resistance connects with the base stage of the first end of the eleventh resistor and the third transistor respectively
It connects, the second end of the eleventh resistor is connect with the emitter of the third transistor, and the twelfth resistor is connected on institute
It states between the collector of third transistor and the base stage of the 4th triode, the thirteenth resistor is connected on the described 4th 3
Between the base stage and emitter of pole pipe.
The beneficial effect of the utility model embodiment is：
The utility model embodiment provides a kind of vibratory drive circuit, and Piezoceramic press key is when being generated deformation by external force
Pressing signal is generated, the pressure conversion that the Piezoceramic press key is received is electric signal, so that key transducing signal be made to identify
Unit can judge whether Piezoceramic press key is pressed by simple electrical signal detection, make pressing detection process it is electrified,
It automates and convenient and efficient；Information of the signal processing unit to other units and electrical component in the vibratory drive circuit
It is focused on, greatly improves the reaction speed and reaction order of accuarcy of vibratory drive circuit；Pulse driver unit exists
The Piezoceramic press key is carried out using the high-voltage pulse signal of impulse generating unit under the control of the signal processing unit
Pulse excitation make its generate vibration, provide accurate feedback signal for user, let the user know that button operation whether be
Effectively operation, improves the key service efficiency of user.
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
By the way that shown in attached drawing, the above and other purpose, feature and advantage of the utility model will be more clear, all attached
Identical appended drawing reference indicates identical part in figure, does not deliberately draw attached drawing by actual size equal proportion scaling, with emphasis on
In the purport for showing the utility model.
Fig. 1 is a kind of module diagram of vibratory drive circuit provided by the embodiment of the utility model；
Fig. 2 is a kind of circuit diagram of key transducing signal recognition unit provided by the embodiment of the utility model；
Fig. 3 is a kind of circuit diagram of signal processing unit provided by the embodiment of the utility model；
Fig. 4 is a kind of circuit diagram of impulse generating unit provided by the embodiment of the utility model；
Fig. 5 is a kind of circuit diagram of pulse driver unit provided by the embodiment of the utility model.
Icon：10- vibratory drive circuit；11- Piezoceramic press key；12- key transducing signal recognition unit；13-
Signal processing unit；14- impulse generating unit；15- pulse driver unit.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the range of the utility model protection.
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 in a attached drawing, does not then need that it is further defined and explained in subsequent 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"
For be based on the orientation or positional relationship shown in the drawings or the utility model product using when the orientation or position usually put
Relationship is merely for convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.This
Outside, term " first ", " second " 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" only refers to 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 should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
Other feature and advantage of the utility model will illustrate in subsequent specification, also, partly from specification
It becomes apparent, or is understood and implementing the utility model embodiment.The purpose of this utility model and other advantages can
It is achieved and obtained by structure specifically indicated in the written description, claims, and drawings.
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 key feedback signal, and the prior art is mainly machinery by key technology
Key and touch key-press two major classes, mechanical key are by metal contact and the non-contact on-off come control circuit, touch key-press
Be divided into resistive touch key and capacitance touch button, but these three key 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 some abrasions can be generated, final key is lost
Effect；Both touch key-press are all unable to satisfy the information feedback of single key, and confirm that pressing person's (finger of such as people) can not be
It is no to have by key pressing；The remolding sensitivity of resistance key is lower, and key point is easy to produce drift and loses keypress function；Capacitor key
When being based on having hand close to key, the capability value of capacitor is changed to detect on key, has more than water in kitchen, toilet
Place, which can generate, accidentally presses or the state of button malfunction, and capacitance touch button is not available then completely under water.It is above-mentioned in order to solve
Problem, the utility model embodiment provide a kind of vibratory drive circuit 10.
Referring to FIG. 1, Fig. 1 is a kind of module diagram of vibratory drive circuit provided by the embodiment of the utility model.
Vibratory drive circuit 10 includes Piezoceramic press key 11, key 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；Key transducing signal recognition unit 12 is connect with Piezoceramic press key 11, is carried out voltage reference to the pressing signal and is raised
And pressing is obtained after relevant signal processing and judges signal；Signal processing unit 13 includes signal processing chip IC1, signal processing
Chip IC 1 connect with key 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 connect with signal processing unit 13, generates high-voltage pulse signal 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 key 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 key 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 key 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 key transducing signal recognition unit 12.
Referring to FIG. 2, Fig. 2 is a kind of circuit of key transducing signal recognition unit provided by the embodiment of the utility model
Figure.
Key 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 key transducing signal is single
Member 12 includes first capacitor C1, the second capacitor C2, third capacitor C3, first resistor R1, second resistance R2 and first diode D1,
The first end of first capacitor C1 is grounded, and the second end of first capacitor C1 is drawn with the common ground of Piezoceramic press key 11 respectively
The connection of the first end of foot and the second capacitor C2, the first end of the second capacitor C2 are also electric with the benchmark of signal processing chip IC1 respectively
Pin (the 4th pin) and the anode connection of first diode D1 are pressed, the cathode of first diode D1 passes through concatenated first electricity
Resistance R1, second resistance R2 are connect with the second end of the second capacitor C2, the second end of the second capacitor C2 also respectively with third capacitor C3
First end and signal processing chip IC1 second pin connection, the second end of third capacitor C3 respectively with the piezoelectricity make pottery
The high drive pin of porcelain key 11 and detection pin connection.
As an optional implementation manner, key transducing signal recognition unit 12 further includes 3rd resistor R3, the 4th electricity
The first end of resistance R4, the 5th resistance R5 and the 6th resistance R6,3rd resistor R3 are connect with the second end of first capacitor C1, third electricity
The second end for hindering R3 connects with the first end of one end of the second capacitor C2, the anode of 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 of diode D1 and the second end of first resistor R1, 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, key 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 key 11 connects, and the second end of the 7th resistance R7 is connect with the 6th resistance R6.
Further, key 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 capacitor C2, cathode ground connection.
Referring to FIG. 3, Fig. 3 is a kind of circuit diagram of signal processing unit provided by the embodiment of the utility model.
Signal processing unit 13 respectively with key 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 key 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 also used to control described in the 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 capacitor 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 capacitor 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 capacitor C4.
As an implementation, the signal processing unit 13 in the present embodiment further includes the 5th capacitor C5, signal processing
6th pin of chip IC 1 is connect with the first end of the 5th capacitor C5, the second end ground connection of the 5th capacitor C5.
Signal processing chip IC1 can be a kind of IC chip, the processing capacity with signal.At above-mentioned signal
Reason chip IC 1 can be at general processor, including central processing unit (Central Processing Unit, CPU), network
Manage device (Network Processor, NP) etc.；It can also be digital signal processor (Digital Signal
Processing, DSP), it is 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 model 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 programming space, 1 536bytes SRAM and
256bytesEEPROM, while there are mW grades of Low-power Technologies, the operating current of sleep pattern lower 0.2 μ A of consumption；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 have
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 downloading and online of program
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 by the embodiment of the utility model.
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, the vibration of piezoelectric ceramic piece can be controlled 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 utility model embodiment to environmental variance is low, and accuracy rate is high, no
It will appear touch screen time length 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,
6th capacitor C6 and the 7th capacitor C7, the first end of 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 capacitor C6, the 7th capacitor 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 capacitor C6 and the second end connection of the 7th capacitor C7.Optionally, the 6th capacitor 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 by the embodiment of the utility model.
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 include 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 key 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 connection, 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 of third transistor Q3 and the base stage of the 4th triode Q4, thirteenth resistor R13 is connected on the 4th triode
Between the base stage and emitter of Q4.
The working principle of vibratory drive circuit 10 provided by the embodiment of the utility model is：
Operator presses Piezoceramic press key 11, and Piezoceramic press key 11 generates pressing when by pressed by external force
The pressing signal is simultaneously transmitted to key transducing signal recognition unit 12 by signal, and key 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 key 11 completes effective pressing operation, and when to be, signal processing unit 13 issues pulse to impulse generating unit 14 and produces
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 to Piezoceramic press key 11 using the high-voltage pulse signal, so that Piezoceramic press key 11
Generate vibrational feedback.
In conclusion the utility model embodiment provides a kind of vibratory drive circuit, Piezoceramic press key is by external force
Pressing signal is generated when generating deformation, the pressure conversion that the Piezoceramic press key is received is electric signal, so that key be made to pass
Sense signal identification unit can judge whether Piezoceramic press key is pressed by simple electrical signal detection, make pressing detection mistake
Journey is electrified, automation and convenient and efficient；Signal processing unit is to other units in the vibratory drive circuit and electrically
The information of element is focused on, and the reaction speed and reaction order of accuarcy of vibratory drive circuit are greatly improved；Pulse
Driving unit makes pottery to the piezoelectricity using the high-voltage pulse signal of impulse generating unit under the control of the signal processing unit
Porcelain key, which carries out pulse excitation, makes it generate vibration, provides accurate feedback signal for user, lets the user know that key
Whether operation is effectively to operate, and improves the key service efficiency of user.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
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；
Key transducing signal recognition unit, connect with the Piezoceramic press key, carries out voltage reference lift 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 key 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, generates high-tension pulse 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
Key generates vibration.
2. vibratory drive circuit according to claim 1, which is characterized in that the key transducing signal recognition unit includes
First capacitor, the second capacitor, third capacitor, first resistor, second resistance and first diode, the first end of the first capacitor
Ground connection, the second end of the first capacitor respectively with the common ground pin of the Piezoceramic press key and second capacitor
First end connection, the first end of second capacitor also respectively with the reference voltage pin of the signal processing chip and described
The anode connection of first diode, the cathode of the first diode pass through the concatenated first resistor, the second resistance
Connect with the second end of second capacitor, the second end of second capacitor also respectively with the first end of the third capacitor with
And the signal processing chip second pin connection, the second end of the third capacitor 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 key 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 the first capacitor
Two ends connection, the second end of the 3rd resistor respectively with one end of second capacitor, the first diode anode with
And the first end connection of the 4th resistance, the second end of the 4th resistance and the reference voltage of the signal processing chip draw
Foot connection, the 5th resistor coupled in parallel are described between the second end of the positive and described first resistor of the 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 key 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 capacitor respectively, described
The second end of 9th resistance is connect with an external power supply, the second end ground connection of the 4th capacitor.
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 capacitor, the second end of the 5th capacitor
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 capacitor and the 7th capacitor, 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 capacitor, the first end of the 7th capacitor and the collector of second triode, institute
State the base stage of the second triode emitter with the tenth pin of the signal processing chip and second triode respectively
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 capacitor respectively
The second end of capacitor connects.
8. vibratory drive circuit according to claim 7, which is characterized in that the 6th capacitor is polar capacitor, described
The anode of 6th capacitor is connect with the cathode of second diode, cathode and first triode of the 6th capacitor
Emitter connection.
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 emitter of the third transistor connection, 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, the anode collector and the Piezoceramic press key with the 4th triode respectively of three diode
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, the first end of the tenth resistance and the signal processing chip
The 16th pin connection, 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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| CN201820841153.2U CN208174657U (en) | 2018-05-31 | 2018-05-31 | A kind of vibratory drive circuit |
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| CN201820841153.2U CN208174657U (en) | 2018-05-31 | 2018-05-31 | A kind of vibratory drive circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649945A (en) * | 2018-05-31 | 2018-10-12 | 苏州攀特电陶科技股份有限公司 | A kind of vibratory drive circuit |
| WO2023164953A1 (en) * | 2022-03-04 | 2023-09-07 | 深圳市韶音科技有限公司 | Acoustic device |
-
2018
- 2018-05-31 CN CN201820841153.2U patent/CN208174657U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649945A (en) * | 2018-05-31 | 2018-10-12 | 苏州攀特电陶科技股份有限公司 | A kind of vibratory drive circuit |
| WO2023164953A1 (en) * | 2022-03-04 | 2023-09-07 | 深圳市韶音科技有限公司 | Acoustic device |
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