CN206202235U - A kind of drive circuit of piezoelectric buzzing piece and burglar alarm - Google Patents
A kind of drive circuit of piezoelectric buzzing piece and burglar alarm Download PDFInfo
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- CN206202235U CN206202235U CN201621248777.0U CN201621248777U CN206202235U CN 206202235 U CN206202235 U CN 206202235U CN 201621248777 U CN201621248777 U CN 201621248777U CN 206202235 U CN206202235 U CN 206202235U
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- 230000001960 triggered effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model is applied to microphone device actuation techniques field, there is provided a kind of drive circuit of piezoelectric buzzing piece, and the drive circuit includes the charge control module and self discharge module that are connected with each other.The control to the drive circuit is realized in the change of the low and high level state that the utility model passes through pulse signal, and then the drive circuit is carried out discharge and recharge to piezoelectricity singing piece, so that the piezoelectricity singing piece discharge and recharge alternately when continue sounding, so as to solve the problems, such as high cost that existing drive circuit of piezoelectric buzzing piece is present, alarm sound fidelity is low and alarm failure easily occurs.The utility model also provides a kind of burglar alarm with above-mentioned drive circuit of piezoelectric buzzing piece.
Description
Technical field
The utility model belongs to microphone device actuation techniques field, more particularly to a kind of drive circuit of piezoelectric buzzing piece and anti-
Steal alarm.
Background technology
It is presently used for generally using piezoelectricity singing piece as the output of burglar alarm sound in the burglar alarm of electric motor car
Device, wherein, piezoelectricity singing piece is engaged to piezoelectricity singing piece with step-up transformer by the electronic switch in one drive circuit
It is driven the purpose that burglar alarm sound is sent to reach.However, due to employing electronic switch and liter in the drive circuit
Pressure transformer, so its is relatively costly.Secondly, the drive circuit can be because in step-up transformer when piezoelectricity singing piece sounding is driven
Primary coil produce damped oscillation and cause audio distortions.Further, since the pin of step-up transformer is easily by vibration influence
Fracture, so being also easy to the problem for causing alarm to be failed.
In summary, to there is high cost, alarm sound fidelity low and easy for existing drive circuit of piezoelectric buzzing piece
There is the problem of alarm failure.
Utility model content
The purpose of this utility model is to provide a kind of drive circuit of piezoelectric buzzing piece, it is intended to solve existing piezoelectric buzzing
The high cost of piece driving circuit presence, alarm sound fidelity are low and the problem of alarm failure easily occur.
The utility model is achieved in that a kind of drive circuit of piezoelectric buzzing piece, for driving piezoelectricity singing piece sounding,
The drive circuit of piezoelectric buzzing piece includes charge control module and self discharge module；
The electrical input of the charge control module and pulse-triggered end are respectively connected to external power source and pulse signal, described
The electricity output end of charge control module connects the power end of the self discharge module, the charge-discharge end connection of the self discharge module
The first end of the piezoelectricity singing piece, the earth terminal of the charge control module, the earth terminal of the self discharge module and described
Second end of piezoelectricity singing piece is connected to ground altogether；
When the pulse signal is in high level state, the charge control module output direct current passes through self discharge mould
Block charges to the piezoelectricity singing piece；When the pulse signal is low level state, the charge control module stops output
The direct current, the piezoelectricity singing piece is discharged by the self discharge module；The piezoelectricity singing piece is handed in discharge and recharge
For sounding when carrying out.
Another object of the present utility model also resides in a kind of burglar alarm of offer, and the burglar alarm includes above-mentioned
Drive circuit of piezoelectric buzzing piece.
In the utility model, realized to by charge control module by the change of the low and high level state of pulse signal
With the control of the drive circuit of piezoelectric buzzing piece of self discharge module composition, and then the drive circuit is set to fill piezoelectricity singing piece
Electric discharge so that the piezoelectricity singing piece discharge and recharge alternately when continue sounding, so as to solve existing piezoelectricity singing piece drive
The high cost of circuit presence, alarm sound fidelity are low and the problem of alarm failure easily occur.
Brief description of the drawings
Fig. 1 is the function structure chart of the drive circuit of piezoelectric buzzing piece that the utility model embodiment is provided；
Fig. 2 is the exemplary circuit structure chart of the drive circuit of piezoelectric buzzing piece that the utility model embodiment is provided.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and implementation
Example, is further elaborated to the utility model.It should be appreciated that specific embodiment described herein is only used to explain
The utility model, is not used to limit the utility model.
In order to realize piezoelectricity singing piece discharge and recharge alternately when continue the function of sounding, and reach the existing pressure of solution
The high cost of electric buzzing piece driving circuit presence, alarm sound fidelity are low and the mesh of the problem of alarm failure easily occur
, the utility model embodiment provides a kind of drive circuit of piezoelectric buzzing piece and burglar alarm, and details are as follows：
Fig. 1 shows the modular structure of the drive circuit of piezoelectric buzzing piece 100 that the utility model embodiment is provided, in order to just
In explanation, the part related to the utility model embodiment is illustrate only, details are as follows：
Drive circuit of piezoelectric buzzing piece 100 includes charge control module 101 and self discharge module 102.
The electrical input of charge control module 101 and pulse-triggered end are respectively connected to power supply VCC and pulse signal S, charge
The power end of the electricity output end connection self discharge module 102 of control module 101, the charge-discharge end connection pressure of self discharge module 102
The first end of electric piezo X, the earth terminal of charge control module 101, the earth terminal of self discharge module 102 and piezoelectricity singing piece X
The second end be connected to ground altogether.
When pulse signal S is in high level state, the output direct current of charge control module 101 passes through self discharge module
102 charge to piezoelectricity singing piece X；When pulse signal S is low level state, charge control module 101 stops output direct current,
Piezoelectricity singing piece X is discharged by self discharge module 102.Piezoelectricity singing piece X discharge and recharge alternately when sounding.
Fig. 2 shows the exemplary circuit structure of the drive circuit of piezoelectric buzzing piece 100 that the utility model embodiment is provided, and is
It is easy to explanation, illustrate only the part related to the utility model embodiment, details are as follows：
Used as the embodiment of the utility model one, charge control module 101 includes the first PNP type triode Q1, the pole of NPN type three
Pipe Q2, first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4.The emitter stage of the first PNP type triode Q1
It is the electrical input of charge control module 101, the collection of the first PNP type triode Q1 with the common contact of the first end of first resistor R1
The first end of electrode connection second resistance R2, second end of second resistance R2 is the electricity output end of charge control module 101, first
The base stage of PNP type triode Q1 and the first end for being connected to 3rd resistor R3 altogether at second end of first resistor R1,3rd resistor R3
The second end connection NPN type triode Q2 colelctor electrode, the first end of the 4th resistance R4 touches for the pulse of charge control module 101
Originator, the base stage of the second end connection NPN type triode Q2 of the 4th resistance R4, the transmitting of NPN type triode Q2 is extremely charged control
The earth terminal of molding block 101.Wherein, the first PNP type triode Q1, NPN type triode Q2, first resistor R1, second resistance R2,
3rd resistor R3 and the 4th resistance R4 can be SMD components, selection SMD components can be prevented effectively from pin it is easily broken and
Caused alarm Problem of Failure.
As the embodiment of the utility model one, self discharge module 102 include diode D, the second PNP type triode Q3 and
5th resistance R5.The common contact of the first end of the anode of diode D and the 5th resistance R5 is the power end of self discharge module 102,
The common contact of the emitter stage of the negative electrode of diode D and the second PNP type triode Q3 is the charge-discharge end of self discharge module 102, the
Second end of five resistance R5 is the earth terminal of self discharge module 102 with the common contact of the colelctor electrode of the second PNP type triode Q3.Its
In, diode D, the second PNP type triode Q3 and the 5th resistance R5 can be SMD components, and selection SMD components can
Be prevented effectively from pin it is easily broken caused by alarm Problem of Failure.
Above-mentioned drive circuit of piezoelectric buzzing piece 100 is described further below in conjunction with operation principle：
Power supply VCC accesses piezoelectricity from the emitter stage of the first PNP type triode and the connects end altogether of the first end of second resistance R2
Buzzing piece driving circuit 100, is charged by the drive circuit of piezoelectric buzzing piece 100 to piezoelectricity singing piece X.Pulse signal S is from
The first end of four resistance R4 accesses drive circuit of piezoelectric buzzing piece 100, controls NPN type triode Q2 and the first PNP type triode
The on or off of Q1, and then the break-make of diode D and the second PNP type triode Q3 is controlled, so as to realize to piezoelectricity singing piece X
Carry out charge and discharge control.When pulse signal S is in high level state, NPN type triode Q2 is higher than it because of the current potential of its base stage
The current potential of emitter stage and turn on, then NPN type triode Q2 by 3rd resistor R3 by the electricity of the base stage of the first PNP type triode Q1
Position is pulled low to ground, and then causes that the first PNP type triode Q1 is turned on because of current potential of the current potential of its emitter stage higher than its base stage, in
Be diode D positive pole obtain forward voltage and turn on, meanwhile, the second PNP type triode Q3 because its base potential higher than its send out
Emitter potential and end, now, power supply VCC by the first PNP type triode Q1, first resistor R1 and diode D to piezoelectricity
Piezo X charges；When pulse signal S is low level state, NPN type triode Q2 is less than its emitter stage because of the current potential of its base stage
Current potential and end so that the first PNP type triode Q1 because between its base stage and emitter stage potential difference cannot meet turn-on condition
And end, so now diode D ends because its positive pole does not have forward voltage to be input into, simultaneously as piezoelectricity singing piece X is stored
There is electricity, so the second PNP type triode Q3 is turned on because of current potential of the current potential of its emitter stage higher than its base stage, so as to landform
Into discharge loop, therefore, piezoelectricity singing piece X can over the ground be discharged by the second PNP type triode Q3.Due to piezoelectricity singing piece X mono-
Directly it is in above-mentioned discharge and recharge alternating state such that it is able to continue sounding.
Based on the low cost of above-mentioned drive circuit of piezoelectric buzzing piece 100, alarm sound fidelity is high and warning effect is stable
Advantage, the utility model embodiment additionally provides a kind of burglar alarm, and it includes above-mentioned drive circuit of piezoelectric buzzing piece
100。
In the utility model embodiment, realized to being controlled by charging by the change of the low and high level state of pulse signal S
The control of the drive circuit of piezoelectric buzzing piece 100 that molding block 101 and self discharge module 102 are constituted, and then make the drive circuit pair
Piezoelectricity singing piece X carries out discharge and recharge so that piezoelectricity singing piece X discharge and recharge alternately when continue sounding, so as to solve existing
Some drive circuit of piezoelectric buzzing piece 100 exist high cost, alarm sound fidelity it is low and it is easy occur alarm failure
Problem.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the utility model, it is all at this
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (6)
1. a kind of drive circuit of piezoelectric buzzing piece, for driving piezoelectricity singing piece sounding, it is characterised in that the piezoelectricity singing piece
Drive circuit includes charge control module and self discharge module；
The electrical input of the charge control module and pulse-triggered end are respectively connected to external power source and pulse signal, the charging
The electricity output end of control module connects the power end of the self discharge module, and the charge-discharge end connection of the self discharge module is described
The first end of piezoelectricity singing piece, the earth terminal of the charge control module, the earth terminal and the piezoelectricity of the self discharge module
Second end of piezo is connected to ground altogether；
When the pulse signal is in high level state, charge control module output direct current by self discharge module to
The piezoelectricity singing piece charges；When the pulse signal is low level state, it is described that the charge control module stops output
Direct current, the piezoelectricity singing piece is discharged by the self discharge module；The piezoelectricity singing piece enters in charge and discharge electrical alternations
Sounding during row.
2. drive circuit of piezoelectric buzzing piece as claimed in claim 1, it is characterised in that the charge control module includes first
PNP type triode, NPN type triode, first resistor, second resistance, 3rd resistor and the 4th resistance；
The emitter stage of first PNP type triode is the charge control mould with the common contact of the first end of the first resistor
The electrical input of block, the colelctor electrode of first PNP type triode connects the first end of the second resistance, the second resistance
The second end be the charge control module electricity output end, base stage and the first resistor of first PNP type triode
The second end the first end for being connected to the 3rd resistor altogether, the second end of the 3rd resistor connects the NPN type triode
Colelctor electrode, the first end of the 4th resistance is the pulse-triggered end of the charge control module, the of the 4th resistance
Two ends connect the base stage of the NPN type triode, the ground connection of the extremely described charge control module of transmitting of the NPN type triode
End.
3. drive circuit of piezoelectric buzzing piece as claimed in claim 1, it is characterised in that the self discharge module includes two poles
Pipe, the second PNP type triode and the 5th resistance；
The anode of the diode and the power end that the common contact of the first end of the 5th resistance is the self discharge module, institute
State the negative electrode of diode and the discharge and recharge that the common contact of the emitter stage of second PNP type triode is the self discharge module
End, the second end of the 5th resistance is the self discharge module with the common contact of the colelctor electrode of second PNP type triode
Earth terminal.
4. drive circuit of piezoelectric buzzing piece as claimed in claim 2, it is characterised in that first PNP type triode, described
NPN type triode, the first resistor, the second resistance, the 3rd resistor and the 4th resistance are paster unit
Device.
5. drive circuit of piezoelectric buzzing piece as claimed in claim 3, it is characterised in that the diode, second positive-negative-positive
Triode and the 5th resistance are SMD components.
6. a kind of burglar alarm, it is characterised in that the burglar alarm is included as any one of claim 1 to 5
Drive circuit of piezoelectric buzzing piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621248777.0U CN206202235U (en) | 2016-11-17 | 2016-11-17 | A kind of drive circuit of piezoelectric buzzing piece and burglar alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621248777.0U CN206202235U (en) | 2016-11-17 | 2016-11-17 | A kind of drive circuit of piezoelectric buzzing piece and burglar alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206202235U true CN206202235U (en) | 2017-05-31 |
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ID=58750118
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621248777.0U Active CN206202235U (en) | 2016-11-17 | 2016-11-17 | A kind of drive circuit of piezoelectric buzzing piece and burglar alarm |
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| CN (1) | CN206202235U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113489095A (en) * | 2021-07-06 | 2021-10-08 | 一念传感科技(深圳)有限公司 | Piezoelectric ceramic actuator linear displacement driving circuit and implementation method thereof |
-
2016
- 2016-11-17 CN CN201621248777.0U patent/CN206202235U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113489095A (en) * | 2021-07-06 | 2021-10-08 | 一念传感科技(深圳)有限公司 | Piezoelectric ceramic actuator linear displacement driving circuit and implementation method thereof |
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Address after: No. 3 Gongye West Road, Songshan Lake Park, Dongguan City, Guangdong Province, 523000 Patentee after: Guangdong Gaobiao Intelligent Technology Co.,Ltd. Address before: No.3, Gongye West Road, Songshanhu high tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee before: SHENZHEN GOBAO ELECTRONIC TECHNOLOGY Co.,Ltd. |