CN208821052U - A kind of double frequency piezoelectric speaker and its driving circuit - Google Patents
A kind of double frequency piezoelectric speaker and its driving circuit Download PDFInfo
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- CN208821052U CN208821052U CN201821754922.1U CN201821754922U CN208821052U CN 208821052 U CN208821052 U CN 208821052U CN 201821754922 U CN201821754922 U CN 201821754922U CN 208821052 U CN208821052 U CN 208821052U
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Abstract
The utility model relates to a kind of double frequency piezoelectric speaker, piezoelectric speaker sounding part is sequentially bonded by piezoelectric ceramic piece M1, sheet metal G and piezoelectric ceramic piece M2 or more and is combined into sandwich structure；Above-mentioned double frequency piezoelectric speaker driving circuit, including the two-frequency signal generator being connect with OCL push-pull driver circuit one, two, the OCL push-pull driver circuit one being connect with piezoelectric ceramic piece M1 or M2, the OCL push-pull driver circuit two being connect with piezoelectric ceramic piece M2 or M1；Above-mentioned double frequency piezoelectric speaker driving circuit, including the two-frequency signal generator being connect with OCL push-pull driver circuit one/bis-/tri-, the OCL push-pull driver circuit one being connect with piezoelectric ceramic piece M1 or M2, the OCL push-pull driver circuit two being connect with piezoelectric ceramic piece M2 or M1, the OCL push-pull driver circuit three being connect with sheet metal G；The utility model piezoelectric speaker has good tone color, small power consumption, the low advantage of light weight and cost, and reliability, service life can also have greatly improved.
Description
Technical field
The utility model relates to a kind of piezoelectric speakers, specifically disclose a kind of double frequency piezoelectric speaker and its driving electricity
Road.
Background technique
Motor vehicles make between other vehicles, pedestrian, inevitably for road during road driving
With and generate contradiction, therefore other side is reminded using method, and loudspeaker are most simple, most direct first-selected instrument naturally.At present
Mechanical oscillation loudspeaker, electronic type electric horn used by the motor vehicles such as the battery power-aid vehicle, motorcycle, the automobile that are travelled on road
Or all there is different drawbacks in piezoelectric loudspeaker.Piezoelectric loudspeaker acoustic pressure is low, monotony, mechanical oscillation loudspeaker or electronic type electric horn
Two loudspeaker combinations of high pitch and bass are often used in order to improve tone color in general common vehicle, in the vehicle of middle and high end often
It can be combined using three high pitch, middle pitch and bass loudspeaker, higher cost, power consumption is very big, and driving current will often reach several peaces
Training is to more than ten amperes.
Utility model content
The goal of the invention of the utility model is: melodious double frequency sound can be issued by providing one kind in order to solve the above problem
Color, to substitute by the double frequency piezoelectric speaker and its driving circuit of the tone color loudspeaker of two or three loudspeaker combinations.
The technical solution adopted in the utility model is such that
A kind of double frequency piezoelectric speaker, including piezoelectricity sounding part, the piezoelectricity sounding part is by piezoelectric ceramic piece M1, metal
Piece G and piezoelectric ceramic piece M2 or more, which are sequentially bonded, is combined into sandwich structure；The piezoelectric ceramic piece M1 and piezoelectric ceramic piece M2
Electric property is mutually indepedent.
A kind of above-mentioned double frequency piezoelectric speaker driving circuit, including two-frequency signal generator, OCL push-pull driver circuit
One, OCL push-pull driver circuit two and piezoelectric speaker, the two-frequency signal generator and OCL push-pull driver circuit one and OCL
Push-pull driver circuit two connects；The OCL push-pull driver circuit one is different from two driving frequency of OCL push-pull driver circuit；It is described
OCL push-pull driver circuit one is connect with the piezoelectric ceramic piece M1 or piezoelectric ceramic piece M2 of piezoelectric speaker piezoelectricity sounding part；Institute
OCL push-pull driver circuit two is stated to connect with the piezoelectric ceramic piece M2 or piezoelectric ceramic piece M1 of piezoelectric speaker piezoelectricity sounding part；
The sheet metal G of the piezoelectric speaker piezoelectricity sounding part is connect with driving circuit power input port.
It further, further include voltage regulator circuit, the voltage regulator circuit is connect with driving circuit power input port, supply
The stable working power of two-frequency signal generator.
Further, the OCL push-pull driver circuit one and two driving frequency of OCL push-pull driver circuit 800~
Between 4000Hz, the frequency difference ratio of two groups of frequencies is between 0.8~0.86.
A kind of above-mentioned double frequency piezoelectric speaker driving circuit, including two-frequency signal generator, OCL push-pull driver circuit
One, OCL push-pull driver circuit two, OCL push-pull driver circuit three and piezoelectric speaker, the two-frequency signal generator and OCL
Push-pull driver circuit one, OCL push-pull driver circuit two and OCL push-pull driver circuit three connect；The OCL push-pull driver circuit one
It is different from two driving frequency of OCL push-pull driver circuit；The OCL push-pull driver circuit one and piezoelectric speaker piezoelectricity sounding part
Piezoelectric ceramic piece M1 or piezoelectric ceramic piece M2 connection；The OCL push-pull driver circuit two and piezoelectric speaker piezoelectricity sounding
The piezoelectric ceramic piece M2 of part or piezoelectric ceramic piece M1 connection；The OCL push-pull driver circuit three is sent out with piezoelectric speaker piezoelectricity
The sheet metal G connection of sound part；The driving voltage frequency and OCL push-pull driver circuit one or OCL of the OCL push-pull driver circuit three
Poor 180 ° of the driving voltage frequency same phase of push-pull driver circuit two.
It further, further include voltage regulator circuit, the voltage regulator circuit is connect with driving circuit power input port, supply
The stable working power of two-frequency signal generator.
Further, the OCL push-pull driver circuit one and two driving frequency of OCL push-pull driver circuit 800~
Between 4000Hz, the frequency difference ratio of two groups of frequencies is between 0.8~0.86.
In conclusion due to the adoption of the above technical scheme, the beneficial effects of the utility model are:
The audio signal for two groups of different frequencies that two-frequency signal generator generates is respectively fed to two-way OCL by the utility model
The A and B signal input terminal of push-pull driver circuit, enlarged driving audio signal are applied separately to the double-deck piezoelectric ceramics on piece,
Mechanical oscillation are generated, amplifies through cone diaphragm and generates resonance with shell to issue melodious double-tone tweeting sound, overturn completely
The dull sound of conventional piezoelectric buzzer loudspeaker；Have a good tone color, small power consumption, the low advantage of light weight and cost, and reliability,
Service life can also have greatly improved, and can be widely applied to all kinds of motor vehicles and be used as prompt, watchful other side's driving safety,
It can be applied to other security alarm fields.
Detailed description of the invention
Fig. 1 is the structure chart of the utility model；
Fig. 2 is a kind of driving circuit figure of the utility model piezoelectric speaker；
Fig. 3 is another driving circuit figure of the utility model piezoelectric speaker.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of double frequency piezoelectric speaker, including piezoelectricity sounding part, the piezoelectricity sounding part are made pottery by piezoelectricity
Tile M1, sheet metal G and piezoelectric ceramic piece M2 or more are sequentially bonded and are combined into sandwich structure；The piezoelectric ceramic piece M1 and pressure
Electroceramics piece M2 electric property is not connected to independently of each other, is separately connected different driving circuits, gives the driving electricity of different frequency
Pressure issues double-tone song sound.
As shown in Fig. 2, a kind of double frequency piezoelectric speaker driving circuit, including voltage regulator circuit 2, two-frequency signal generator 1,
OCL push-pull driver circuit 1, OCL push-pull driver circuit 24 and piezoelectric speaker 5, the voltage regulator circuit 2 and driving circuit
The connection of power input port, (voltage regulator circuit 2 has buck functionality to the stable working power of supply two-frequency signal generator 1, will
Power input voltage uses after being down to 3~5V to two-frequency signal generator 1)；The output terminals A of the two-frequency signal generator 1, B
It connect that (two-frequency signal generator 1 can with input terminal A, B of OCL push-pull driver circuit 1 and OCL push-pull driver circuit 24 respectively
To control adjustment output signal by single-chip microcontroller, give OCL push-pull driver circuit 1 and OCL push-pull driver circuit 24 different frequency
Input signal)；The OCL push-pull driver circuit 1 is different from the frequency of the driving output of OCL push-pull driver circuit 24；It is described
The frequency of 24 driving signal of OCL push-pull driver circuit 1 and OCL push-pull driver circuit is between 800~4000Hz, two groups of frequencies
Frequency difference ratio between 0.8~0.86；
The piezoelectric ceramic piece M1 of one 3 output end of OCL push-pull driver circuit and 5 piezoelectricity sounding part of piezoelectric speaker connects
It connects；24 output end of OCL push-pull driver circuit is connect with the piezoelectric ceramic piece M2 of 5 piezoelectricity sounding part of piezoelectric speaker；Institute
The sheet metal G for stating 5 piezoelectricity sounding part of piezoelectric speaker is connect with driving circuit power input port.
When the frequency of difference frequency driving signal and the piezoelectric ceramic piece of piezoelectric speaker 5 and piezoelectric ceramic piece and loudspeaker cavity
In conjunction with two resonance peak frequencies reach unanimity when, the acoustic pressure that piezoelectric speaker 5 pipes can reach 2m > 95db, meet
The acoustic pressure requirement of the loudspeaker such as general battery power-aid vehicle, motorcycle.
As shown in figure 3, a kind of above-mentioned double frequency piezoelectric speaker driving circuit, including voltage regulator circuit 2, two-frequency signal occur
Device 1, OCL push-pull driver circuit 1, OCL push-pull driver circuit 24, OCL push-pull driver circuit 36 and piezoelectric speaker 5；
The voltage regulator circuit 2 is connect with driving circuit power input port, and the stable working power of supply two-frequency signal generator is (steady
Volt circuit 2 has buck functionality, and power input voltage is down to after 3~5V and is used to two-frequency signal generator 1)；The double frequency
The output terminals A or B of signal generator 1 orRespectively correspond with OCL push-pull driver circuit 1, OCL push-pull driver circuit 24 and
(two-frequency signal generator 1 can be controlled adjustment output by single-chip microcontroller for 36 input terminal A or B of OCL push-pull driver circuit or A-connection
Signal gives 36 different frequency of OCL push-pull driver circuit 1, OCL push-pull driver circuit 24 and OCL push-pull driver circuit
Input signal)；The OCL push-pull driver circuit 1 is different from 24 output driving frequency of OCL push-pull driver circuit；The OCL
Push-pull driver circuit 1 and 4 output driving frequency of OCL push-pull driver circuit are between 800~4000Hz, the frequency difference ratio of two groups of frequencies
Between 0.8~0.86；
The piezoelectric ceramic piece M2 of one 3 output end of OCL push-pull driver circuit and 5 piezoelectricity sounding part of piezoelectric speaker connects
It connects；24 output end of OCL push-pull driver circuit is connect with the piezoelectric ceramic piece M1 of 5 piezoelectricity sounding part of piezoelectric speaker；Institute
36 output end of OCL push-pull driver circuit is stated to connect with the sheet metal G of 5 piezoelectricity sounding part of piezoelectric speaker；
The driving voltage frequency and OCL push-pull driver circuit 1 or OCL push-pull drive of the OCL push-pull driver circuit 36
The output driving frequency same phase of circuit 24 is poor 180 ° (i.e. opposite in phase)；OCL push-pull driver circuit 1 or OCL recommend drive
Dynamic circuit 24, OCL push-pull driver circuit 36 and piezoelectric ceramic piece M1 or M2, sheet metal G are combined into BTL driving circuit, work
When in the extremely upper driving voltage Vp-p ≈ 2*VCC generated of piezoelectric ceramic piece M1 or M2, sheet metal G two.
OCL push-pull driver circuit 1, OCL push-pull driver circuit 24, OCL push-pull driver circuit 36 amplify signal, make
The both ends piezoelectric ceramic piece M1, M2 of piezoelectric speaker 5 generate alternating voltage respectively to deformation, generate mechanical oscillation, work as drive
Dynamic frequency tends to one with the two resonance peak frequencies of the piezoelectric ceramic piece of piezoelectric speaker 5 and piezoelectric ceramic piece in conjunction with cavity
When cause, continuous double frequency tweeting sound is issued, acoustic pressure reaches 2m@> 105db, is entirely capable of meeting the motor vehicles such as general motorcycle, automobile
The acoustic pressure requirement of loudspeaker.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (7)
1. a kind of double frequency piezoelectric speaker, including piezoelectricity sounding part, it is characterised in that: the piezoelectricity sounding part is by piezoelectric ceramics
Piece M1, sheet metal G and piezoelectric ceramic piece M2 or more are sequentially bonded and are combined into sandwich structure；The piezoelectric ceramic piece M1 and piezoelectricity
Potsherd M2 electric property is mutually indepedent.
2. a kind of double frequency piezoelectric speaker driving circuit as described in claim 1, it is characterised in that: sent out including two-frequency signal
Raw device, OCL push-pull driver circuit one, OCL push-pull driver circuit two and piezoelectric speaker；The two-frequency signal generator with
OCL push-pull driver circuit one and OCL push-pull driver circuit two connect；The OCL push-pull driver circuit one and OCL push-pull drive electricity
Two driving frequency of road is different；The piezoelectricity sounding part piezoelectric ceramic piece M1 of the OCL push-pull driver circuit one and piezoelectric speaker
Or piezoelectric ceramic piece M2 connection；The piezoelectricity sounding part piezoelectric ceramic piece of the OCL push-pull driver circuit two and piezoelectric speaker
M2 or piezoelectric ceramic piece M1 connection；The piezoelectricity sounding part sheet metal G and driving circuit power input of the piezoelectric speaker
Port connection.
3. double frequency piezoelectric speaker driving circuit according to claim 2, it is characterised in that: it further include voltage regulator circuit,
The voltage regulator circuit is connect with driving circuit power input port, the stable working power of supply two-frequency signal generator.
4. double frequency piezoelectric speaker driving circuit according to claim 2, it is characterised in that: the OCL push-pull drive
Circuit one and two driving frequency of OCL push-pull driver circuit are between 800~4000Hz, and the frequency difference ratio of two groups of frequencies is 0.8~0.86
Between.
5. a kind of double frequency piezoelectric speaker driving circuit as described in claim 1, it is characterised in that: sent out including two-frequency signal
Raw device, OCL push-pull driver circuit one, OCL push-pull driver circuit two, OCL push-pull driver circuit three and piezoelectric speaker, it is described
Two-frequency signal generator is connect with OCL push-pull driver circuit one, OCL push-pull driver circuit two and OCL push-pull driver circuit three；Institute
It is different from two driving frequency of OCL push-pull driver circuit to state OCL push-pull driver circuit one；The OCL push-pull driver circuit one and pressure
The piezoelectric ceramic piece M1 of electroceramics loudspeaker piezoelectricity sounding part or piezoelectric ceramic piece M2 connection；The OCL push-pull driver circuit two with
The piezoelectric ceramic piece M2 of piezoelectric speaker piezoelectricity sounding part or piezoelectric ceramic piece M1 connection；The OCL push-pull driver circuit three
It is connect with the sheet metal G of piezoelectric speaker piezoelectricity sounding part；The driving voltage frequency of the OCL push-pull driver circuit three with
Poor 180 ° of driving voltage frequency same phase of OCL push-pull driver circuit one or OCL push-pull driver circuit two.
6. double frequency piezoelectric speaker driving circuit according to claim 5, it is characterised in that: it further include voltage regulator circuit,
The voltage regulator circuit is connect with driving circuit power input port, the stable working power of supply two-frequency signal generator.
7. double frequency piezoelectric speaker driving circuit according to claim 5, it is characterised in that: the OCL push-pull drive
Circuit one and two driving frequency of OCL push-pull driver circuit are between 800~4000Hz, and the frequency difference ratio of two groups of frequencies is 0.8~0.86
Between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821754922.1U CN208821052U (en) | 2018-10-29 | 2018-10-29 | A kind of double frequency piezoelectric speaker and its driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821754922.1U CN208821052U (en) | 2018-10-29 | 2018-10-29 | A kind of double frequency piezoelectric speaker and its driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208821052U true CN208821052U (en) | 2019-05-03 |
Family
ID=66280343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821754922.1U Active CN208821052U (en) | 2018-10-29 | 2018-10-29 | A kind of double frequency piezoelectric speaker and its driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208821052U (en) |
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2018
- 2018-10-29 CN CN201821754922.1U patent/CN208821052U/en active Active
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A dual frequency piezoelectric ceramic horn and its driving circuit Effective date of registration: 20210819 Granted publication date: 20190503 Pledgee: China Construction Bank Corporation Changzhou Branch Pledgor: CHANGZHOU DONGCUN ELECTRONIC Co.,Ltd. Registration number: Y2021980007956 |