CN110460941A - Transmitting-receiving integrated graphene sonic transducer - Google Patents
Transmitting-receiving integrated graphene sonic transducer Download PDFInfo
- Publication number
- CN110460941A CN110460941A CN201910664270.5A CN201910664270A CN110460941A CN 110460941 A CN110460941 A CN 110460941A CN 201910664270 A CN201910664270 A CN 201910664270A CN 110460941 A CN110460941 A CN 110460941A
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- Prior art keywords
- graphene
- circuit
- electromagnetic coil
- sound
- crown
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/003—Mems transducers or their use
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The present invention devises a kind of graphene sonic transducer of transceiver, including the top crown, electromagnetic coil and bottom crown being sequentially arranged from top to bottom, wherein insulating layer is equipped with upper bottom crown and electromagnetic coil contact portion, and the top crown is attached with graphene film layer, the bottom crown includes support plate and copper-based bottom, the copper-based bottom is contacted with insulating layer, it further include that circuit and sound transmit circuit are received by the sound that selection switch accesses upper bottom crown, the sound receives circuit and accesses D.C. regulated power supply, and the voltage signal of generation is exported by amplifying circuit；The sound transmit circuit is connected into D.C. regulated power supply and AC power source, and wherein AC power source has electromagnetic coil by amplifier access.The unique structure arrangement cooperation transceiver circuit of the present invention, fully achieves the function of efficiently transmitting-receiving voice signal.
Description
Technical field
The present invention relates to a kind of transmitting-receiving integrated graphene sonic transducers of high-performance, can be applied to medical imaging, detection, electricity
Sub- product communication etc..
Background technique
Sonic transducer is a kind of energy converter that can be mutually converted voice signal and electric signal.It, can using sonic transducer
To receive the voice signal in nature and be translated into electric signal, other physical signals are further converted to, such as ultrasound is surveyed
Distance meter；It can also convert electrical signals to voice signal, such as loudspeaker.It is widely used in consumer electronics sector at present
Sonic transducer has Electret Condencer Microphone, utilizes capacitance principle, bottom crown is fixed, vibratile film is made as upper pole
Plate.Guarantee that voltage across poles is constant, when film experiences external sound wave, it may occur that corresponding vibration then deviates former balance position
It sets, changes the two poles of the earth distance between plates, capacitance is made to change.
Electret Condencer Microphone has preferable performance in terms of receiving voice signal, but it exists not in terms of sounding
Foot.Electric signal excitation to top crown (film) cannot be excessive, so that the amplitude very little of film, the voice signal of conversion cannot expire
Foot requires, so which also limits the functions of the transceiver of Electret Condencer Microphone, further, since Electret Condencer Microphone makes at present
With the limitation of thin-film material, so that its requirement in terms of frequency response, being unable to satisfy some products.
Summary of the invention
The present invention seeks to overcome the deficiencies of the prior art and provide a kind of graphene sound sensing of high-performance transceiver
Device.
In order to achieve the above objectives, the present invention devises a kind of graphene sonic transducer of transceiver, including from top to bottom
Top crown, electromagnetic coil and the bottom crown being sequentially arranged, wherein it is equipped with insulating layer with upper bottom crown and electromagnetic coil contact portion,
And the top crown is attached with graphene film layer, is characterized in that the bottom crown includes support plate and copper-based bottom, institute
It states copper-based bottom to contact with insulating layer, further includes receiving circuit and sound transmitting electricity by the sound that selection switch accesses upper bottom crown
Road, the sound receive circuit and access D.C. regulated power supply, and the voltage signal of generation is exported by amplifying circuit；The sound hair
Transmit-receive radio road is connected into D.C. regulated power supply and AC power source, and wherein AC power source has electromagnetic coil by amplifier access.
Further, the sound receives circuit and sound transmit circuit common DC regulated power supply, the AC power source
By selection switch access.
Further, the radius of the graphene film layer is 1mm, with a thickness of 50 μm.The centre frequency of the film is reachable
The frequency response bandwidth of sensor can be improved in 520K Hz.
Further, the insulating layer is cyclic structure, and outer diameter is equal with graphene film radius, internal diameter 0.6mm, by
Polyvinyl chloride resin is made, which can not only play the role of supports insulative, can also avoid the obstruction to magnetic circuit, is electromagnetic wire
Circle plays maximum effect.
Further, the electromagnetic coil is formed by by the identical enameled wire of multiturn line footpath, generally cyclic structure, the ring
The outer diameter of shape structure is 1mm, internal diameter 0.4mm, with a thickness of 100 μm.The annular electromagnetic coil, can be in coil after being passed through electric current
Inside generates stronger magnetic field, improves the signal output of sensor.
Further, the support plate outer diameter of the bottom crown is 1mm, and copper substrate thickness is 50 μm, supports 100 μ of plate thickness
m。
The present invention makes sonic transducer realize that broader frequency is rung using the graphene film of high physical property as vibrating membrane
It answers, devises transceiver circuit, reiving/transmitting state can be switched at any time, the present invention not only can receive the sound of more wide frequency ranges
Sound signal, and after introducing electromagnetic coil, the vibration spoke of graphene film is improved, the sound pressure level for exporting sensor is in input electricity
It presses a timing to be improved, highly sensitive signal transmitting may be implemented, meet higher launch requirements, the unique knot of the present invention
Structure arrangement cooperation transceiver circuit, fully achieves the function of efficiently transmitting-receiving voice signal.
Compared to the prior art, the present invention has the following technical effect that
(1) sonic transducer can with high-performance receive and emit sound in one, using electromagnetic excitation, especially in sounding
The effect of aspect is better than conventional capacitive formula microphone.
(2) graphene film has been used, has enabled the sonic transducer sound that not only detectable human ear is heard, moreover it is possible to super
Sound wave is detected.
(3) correlation means are combined, which can be used alone, the fields such as electronic product communication, small detection are used for,
It can be made into sensor array for ranging, imaging, industrial nondestructive testing etc..
Detailed description of the invention
Fig. 1 is overall structure hierarchical diagram of the present invention；
Fig. 2 is control flow chart of the present invention；
Fig. 3 is circuit theory schematic diagram of the present invention.
In figure: top crown 1, substrate 1.1, graphene film layer 1.2, electromagnetic coil 2, insulating layer 3, bottom crown 4, copper pole
Plate 4.1, support plate 4.2.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
See Fig. 1, the present invention is the transmitting-receiving integrated graphene film sonic transducer of high-performance, including top crown 1, electromagnetic coil
2, insulating layer 3 and bottom crown 4, electromagnetic coil 2 have absolutely between top crown 1 and bottom crown 4 with upper bottom crown contact portion
Edge layer；Top crown includes the graphene film layer 1.2 of substrate 1.1 and substrate attachment；Bottom crown 4 is copper pole plate 4.1 and support
Plate 4.2, support plate 4.2 is lower to lay corresponding signal amplification circuit unit.In this specific implementation, substrate 1.1 is SiO2Substrate, stone
Black alkene film radius is 1mm, with a thickness of 50 μm, and one angle can connect external circuit；Insulating layer 3 is an annulus, outer diameter with
Film radius is equal, and internal diameter 0.6mm is made of polyvinyl chloride resin, can play insulation and support.First insulating layer is located at
Between top crown and electromagnetic coil, second insulating layer is between electromagnetic coil 2 and bottom crown 4, and electromagnetic coil 2 is by multiturn line footpath
Identical enameled wire composition, can be seen as an annulus, outer diameter 1mm, internal diameter 0.4mm, with a thickness of 100 μm.Bottom crown is copper
Substrate and support plate outer diameter are 1mm, and copper substrate thickness is 50 μm, 100 μm of 4.2 thickness of support plate, can be connected for one jiao on copper-based bottom
External circuit specifically connects tributary source cathode.Support plate is pcb board in the design.
See Fig. 2, the present invention is when receiving voice signal, specific implementation are as follows: it is permanent to apply direct current between top crown and bottom crown
Constant voltage generates vibration when film is by certain acoustic pressure, and interpolar distance changes, and capacitor changes, not due to voltage
Become, so alternating signal can be generated, through the exportable electric signal met the requirements of amplifying circuit；When making a sound signal, specifically
Implement are as follows: apply DC constant voltage and an ac signal between top crown and bottom crown, AC signal passes through electrically conductive
Graphene film when can generate electromagnetic field, and AC signal passes through amplifying circuit and accesses electromagnetic coil, generates alternating electromagnetism
Power makes film, and amplitude becomes larger up and down, generates the voice signal met the requirements.Electromagnetic coil insulation, material is copper, helical form coiling.
Fig. 3 is circuit diagram, in figure, electric routing capacitance C, resistance R1, DC power supply DC, AC power source AC amplifier,
Electromagnetic coil, power switch S1 and selection switch SPDT1 composition.C capacitor indicate circuit connection top crown and bottom crown, when with
When receiving voice signal, S1 closure, SPDT1 pushes 1, only accesses direct-flow voltage regulation source DC in circuit, C capacitor becomes at this time
Change, will lead at resistance R1 that there are alternate electrical signals, can export through amplifier A1 to controller；When for emitting voice signal
When, S1 closure, SPDT1 pushes 2, and direct-flow voltage regulation source DC and AC power source AC is accessed in circuit, and AC power source AC issues an exchange
Electric signal, the signal generate top crown and vibrate and generate electromagnetic force, ac signal passes through amplifier A2 by capacitor C
Electromagnetic coil is accessed, stronger electromagnetic force is generated.To interact with top crown, the amplitude of film is improved, is generated stronger
Voice signal, so that entire sonic transducer is provided with transceiver, the ability of high performance signal output.Specially graphene film
After being passed through AC signal, magnetic field can be generated, is passed through the AC signal of amplification in electromagnetic coil at this time, within a signal period
Graphene film and electromagnetic coil can generate periodic interaction force, attraction or repulsion, due to electromagnetic coil position
It fixes, at this time film periodic vibration.
When using the present invention, the signal output of amplifier circuit unit A1 can connect the controller based on STM32, utilize the control
Device processed can real-time monitoring capacitor variation, when receiving sound, collected electric signal can be used for controlling executing agency by processing.
In sensor sounding, the output of ac signal also can control, further to the frequency harmony of sonic transducer made a sound
It arbitrarily downgrades and is controlled, the voice signal met the requirements.
Claims (6)
1. a kind of graphene sonic transducer of transceiver, including be sequentially arranged from top to bottom top crown, electromagnetic coil and under
Pole plate, wherein being equipped with insulating layer with upper bottom crown and electromagnetic coil contact portion, and the top crown is attached with graphene film
Layer, it is characterised in that: the bottom crown includes support plate and copper-based bottom, and it further includes passing through that the copper-based bottom is contacted with insulating layer
The sound that selection switch accesses upper bottom crown receives circuit and sound transmit circuit, and the sound receives circuit and accesses DC voltage-stabilizing
The voltage signal of power supply, generation is exported by amplifying circuit；The sound transmit circuit connect into D.C. regulated power supply with exchange
Power supply, wherein AC power source has electromagnetic coil by amplifier access.
2. the graphene sonic transducer of transceiver according to claim 1, it is characterised in that: the sound receives circuit
With sound transmit circuit common DC regulated power supply, the AC power source is by selection switch access.
3. the graphene sonic transducer of transceiver according to claim 1, it is characterised in that: the graphene film layer
Radius be 1mm, with a thickness of 50 μm.The frequency response bandwidth of sensor can be improved up to 520K Hz in the centre frequency of the film.
4. the graphene sonic transducer of transceiver according to claim 1, it is characterised in that: the insulating layer is ring-type
Structure, outer diameter is equal with graphene film radius, and internal diameter 0.6mm is made of polyvinyl chloride resin, which can not only play branch
The effect for supportting insulation, can also avoid the obstruction to magnetic circuit, be that electromagnetic coil plays maximum effect.
5. the graphene sonic transducer of transceiver according to claim 1, it is characterised in that: the electromagnetic coil have by
The identical enameled wire composition of multiturn line footpath, generally cyclic structure, the outer diameter of the cyclic structure are 1mm, internal diameter 0.4mm, thickness
Degree is 100 μm.The annular electromagnetic coil can generate stronger magnetic field in coil inside, improve sensor after being passed through electric current
Signal output.
6. the graphene sonic transducer of transceiver according to claim 1, it is characterised in that: the support of the bottom crown
Plate outer diameter is 1mm, and copper substrate thickness is 50 μm, supports 100 μm of plate thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910664270.5A CN110460941B (en) | 2019-07-23 | 2019-07-23 | Transmitting-receiving integrated graphene acoustic sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910664270.5A CN110460941B (en) | 2019-07-23 | 2019-07-23 | Transmitting-receiving integrated graphene acoustic sensor |
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| Publication Number | Publication Date |
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| CN110460941A true CN110460941A (en) | 2019-11-15 |
| CN110460941B CN110460941B (en) | 2020-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910664270.5A Active CN110460941B (en) | 2019-07-23 | 2019-07-23 | Transmitting-receiving integrated graphene acoustic sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112203209A (en) * | 2020-10-12 | 2021-01-08 | 宁波石墨烯创新中心有限公司 | Preparation method and device of electrostatic loudspeaker diaphragm |
| CN114339543A (en) * | 2021-12-23 | 2022-04-12 | 歌尔微电子股份有限公司 | Transmitting-receiving integrated acoustic circuit, acoustic chip, control method of acoustic chip and wearable device |
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| JP2000050392A (en) * | 1998-07-16 | 2000-02-18 | Massachusetts Inst Of Technol <Mit> | Ultrasonic transducer |
| CN1709587A (en) * | 2004-06-18 | 2005-12-21 | 精工爱普生株式会社 | Ultrasonic transducer, ultrasonic speaker, and method of controlling the driving of ultrasonic transducer |
| CN1965609A (en) * | 2004-06-11 | 2007-05-16 | 精工爱普生株式会社 | Ultrasonic transducer and ultrasonic speaker using the same |
| US20120250902A1 (en) * | 2011-03-29 | 2012-10-04 | Hon Hai Precision Industry Co., Ltd. | Thermoacoustic device |
| CN105180854A (en) * | 2015-10-07 | 2015-12-23 | 华北水利水电大学 | Large-power four-crystal integrated ultrasonic transducer |
| CN107246909A (en) * | 2017-05-22 | 2017-10-13 | 武汉理工大学 | graphene acoustic sensor array |
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2019
- 2019-07-23 CN CN201910664270.5A patent/CN110460941B/en active Active
Patent Citations (6)
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|---|---|---|---|---|
| JP2000050392A (en) * | 1998-07-16 | 2000-02-18 | Massachusetts Inst Of Technol <Mit> | Ultrasonic transducer |
| CN1965609A (en) * | 2004-06-11 | 2007-05-16 | 精工爱普生株式会社 | Ultrasonic transducer and ultrasonic speaker using the same |
| CN1709587A (en) * | 2004-06-18 | 2005-12-21 | 精工爱普生株式会社 | Ultrasonic transducer, ultrasonic speaker, and method of controlling the driving of ultrasonic transducer |
| US20120250902A1 (en) * | 2011-03-29 | 2012-10-04 | Hon Hai Precision Industry Co., Ltd. | Thermoacoustic device |
| CN105180854A (en) * | 2015-10-07 | 2015-12-23 | 华北水利水电大学 | Large-power four-crystal integrated ultrasonic transducer |
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| KAIHUA CAO等: "Design and Simulation of Two-Dimensional Graphene-Based Acoustic Sensor Arrays", 《2017 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM(IUS)》 * |
| KAIHUA CAO等: "Integrated Transmitting and Receiving Modality Graphene Microphone Array", 《2018 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM(IUS)》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112203209A (en) * | 2020-10-12 | 2021-01-08 | 宁波石墨烯创新中心有限公司 | Preparation method and device of electrostatic loudspeaker diaphragm |
| CN112203209B (en) * | 2020-10-12 | 2021-11-23 | 宁波石墨烯创新中心有限公司 | Preparation method and device of electrostatic loudspeaker diaphragm |
| CN114339543A (en) * | 2021-12-23 | 2022-04-12 | 歌尔微电子股份有限公司 | Transmitting-receiving integrated acoustic circuit, acoustic chip, control method of acoustic chip and wearable device |
| WO2023116395A1 (en) * | 2021-12-23 | 2023-06-29 | 歌尔微电子股份有限公司 | Transmitting and receiving integrated acoustic circuit, acoustic chip and control method therefor, and wearable device |
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| Publication number | Publication date |
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| CN110460941B (en) | 2020-12-18 |
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