CN106937227A - It is a kind of new without the active microphone of vibrating diaphragm - Google Patents
It is a kind of new without the active microphone of vibrating diaphragm Download PDFInfo
- Publication number
- CN106937227A CN106937227A CN201710245254.3A CN201710245254A CN106937227A CN 106937227 A CN106937227 A CN 106937227A CN 201710245254 A CN201710245254 A CN 201710245254A CN 106937227 A CN106937227 A CN 106937227A
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- ultrasonic wave
- sound source
- target sound
- transducer
- reflected back
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- 238000002604 ultrasonography Methods 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims 1
- 230000009897 systematic effect Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002620 polyvinyl fluoride Polymers 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 230000002463 transducing effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/02—Microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2217/00—Details of magnetostrictive, piezoelectric, or electrostrictive transducers covered by H04R15/00 or H04R17/00 but not provided for in any of their subgroups
- H04R2217/03—Parametric transducers where sound is generated or captured by the acoustic demodulation of amplitude modulated ultrasonic waves
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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
It is new without the active microphone of vibrating diaphragm the invention discloses one kind, including：Ultrasound transmitting transducer (1), ultrasonic wave receive transducer (2) and control circuit (3)；Control circuit (3) is electrically connected with ultrasound transmitting transducer (1) and ultrasonic wave receive transducer (2) respectively, and control ultrasound transmitting transducer (1) actively to launch ultrasonic wave to target sound source, ultrasonic wave receive transducer (2) is controlled to receive the ultrasonic wave that the target sound source is reflected back simultaneously, and the vibration information of the target sound source is determined according to the ultrasonic wave that the target sound source is reflected back, the vibration information to the target sound source is analyzed calculating again, so as to draw the radiated sound field information of the target sound source.It is of the invention to sound pressure information and insensitive, can effectively suppress the influence of environmental background noise, increase the signal to noise ratio of target acoustic signal, this is advantageous to lift acoustic intelligence systematic entirety energy.
Description
Technical field
It is new without the active microphone of vibrating diaphragm the present invention relates to microphone field, more particularly to one kind.
Background technology
Microphone is also referred to as microphone or microphone, is a kind of to obtain in air dielectric acoustic signals and be converted into corresponding electricity
The sensor of signal, has extensively in fields such as acoustic measurement, video telephone, music broadcast, voice activated control, consumer electronics products
General application.
In the prior art, the species of microphone is a lot, for example：Can be divided into electrodynamic type, electric capacity according to transducing mode difference
Formula and piezoelectric type etc., can be divided into pressure type, differential and combined type etc., according to the difference of directive property according to the difference of the mode of reception
Three kinds of non-directive, double directing property and unidirectivity can be divided into.But no matter which kind of microphone is using diaphragm structure and air
Pressure oscillation positive energy exchange, it is passive to receive sound field acoustic pressure or pressure difference signal, therefore in terms of acoustical signal reception or measurement, existing biography
Sound device is inevitably disturbed by ambient noise signal, causes echo signal effective signal-to-noise ratio relatively low, produces measurement
Error, influences acoustic intelligence systematic function.
The content of the invention
It is new without the active microphone of vibrating diaphragm the invention provides one kind for above-mentioned weak point of the prior art,
The influence of environmental background noise can effectively be suppressed, increase the signal to noise ratio of target acoustic signal, this is advantageous to lift acoustic intelligence
Systematic entirety energy.
The purpose of the present invention is achieved through the following technical solutions：
It is a kind of new without the active microphone of vibrating diaphragm, including：Ultrasound transmitting transducer 1, the and of ultrasonic wave receive transducer 2
Control circuit 3；Control circuit 3 is electrically connected with ultrasound transmitting transducer 1 and ultrasonic wave receive transducer 2 respectively, and is controlled super
The active of soic wave transmitting energy converter 1 launches ultrasonic wave to target sound source, while controlling ultrasonic wave receive transducer 2 to receive the target sound
The ultrasonic wave that source is reflected back, and the vibration information of the target sound source is determined according to the ultrasonic wave that the target sound source is reflected back,
The vibration information to target sound source is analyzed calculating again, so as to draw the radiated sound field information of the target sound source.
Preferably, described control circuit 3 includes that ultrasonic wave emission control module, ultrasonic wave receive control module and data
Collection resolves module；Ultrasonic wave emission control module is electrically connected with ultrasound transmitting transducer 1, and controls ultrasonic wave to launch transducing
The active of device 1 launches ultrasonic wave to target sound source；Ultrasonic wave receives control module and is electrically connected with ultrasonic wave receive transducer 2, and controls
Ultrasonic wave receive transducer 2 processed receives the ultrasonic wave that the target sound source is reflected back；Data acquisition resolves module acquisition ultrasonic wave and connects
The ultrasonic wave that the target sound source of the reception of transducer 2 is reflected back is received, and demodulates the phase of the ultrasonic wave that the target sound source is reflected back
Information, so that it is determined that go out the vibration information of the target sound source, then is analyzed calculating to the vibration information of the target sound source, from
And draw the radiated sound field information of the target sound source.
Preferably, described ultrasonic wave emission control module controls transmission power, the ultrasonic wave of ultrasound transmitting transducer 1
The incident angle of frequency and ultrasonic wave to target sound source.
Preferably, the single PZT (piezoelectric transducer) of the ultrasound transmitting transducer 1 or it is made up of multiple PZT (piezoelectric transducer)s
Piezoelectric transducer array.
Preferably, the single PZT (piezoelectric transducer) of the ultrasonic wave receive transducer 2 or it is made up of multiple PZT (piezoelectric transducer)s
Piezoelectric transducer array.
As seen from the above technical solution provided by the invention, it is provided by the present invention new active transaudient without vibrating diaphragm
Device is simultaneously provided without the diaphragm structure of traditional microphones, nor passively receiving sound field sound pressure signal, but is launched by ultrasonic wave
The active of transducer 1 launches ultrasonic wave to target sound source, and according to Doppler effect, the vibration of target sound source can be to incident ultrasonic wave
Phase-modulation is produced, while ultrasonic wave receive transducer 2 can receive the ultrasonic wave that target sound source modulation back reflection is returned, and is controlled
The phase information of the ultrasonic wave that circuit 3 can be reflected back to target sound source is demodulated, so as to the vibration for obtaining target sound source is believed
Breath, as long as then the vibration information to the target sound source is analyzed calculating, it is possible to draw the radiation sound of the target sound source
Field information, that is, realize the function that acoustic signals are converted to electric signal of microphone.As can be seen here, of the invention and insensitive acoustic pressure
Information, therefore, it is possible to effectively suppress the influence of environmental background noise, increases the signal to noise ratio of target acoustic signal, and this is advantageous to carry
Rise acoustic intelligence systematic entirety energy.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will use needed for embodiment description
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill in field, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 new structural representations without the active microphone of vibrating diaphragm for the embodiment of the present invention is provided.
Specific embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground description, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on this
Inventive embodiment, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to protection scope of the present invention.
New it is described in detail without the active microphone of vibrating diaphragm to provided by the present invention below.
As shown in figure 1, it is a kind of new without the active microphone of vibrating diaphragm, including：Ultrasound transmitting transducer 1, ultrasonic wave connects
Receive transducer 2 and control circuit 3；Control circuit 3 is electrically connected with ultrasound transmitting transducer 1 and ultrasonic wave receive transducer 2 respectively
Connect, and control the active of ultrasound transmitting transducer 1 to launch ultrasonic wave to target sound source, while controlling ultrasonic wave receive transducer 2
The ultrasonic wave that the target sound source is reflected back is received, and the target sound source is determined according to the ultrasonic wave that the target sound source is reflected back
Vibration information, then calculating is analyzed to the vibration information of the target sound source, so as to draw the radiation sound of the target sound source
Field information, that is, realize the function that acoustic signals are converted to electric signal of microphone.
Wherein, new each part without the active microphone of vibrating diaphragm can include embodiments below：
(1) ultrasound transmitting transducer 1：Described ultrasound transmitting transducer 1 can be actively super to target sound source transmitting
Sound wave.Described ultrasound transmitting transducer 1 can use single PZT (piezoelectric transducer), it would however also be possible to employ by multiple PZT (piezoelectric transducer)s
The piezoelectric transducer array of composition, and when ultrasound transmitting transducer 1 is using piezoelectric transducer array, it is possible to achieve multiple enters
Firing angle degree launches ultrasonic wave to target sound source.In actual applications, described PZT (piezoelectric transducer) can use of the prior art
The transducer that the piezoelectrics such as lead titanate piezoelectric ceramics, piezoelectric monocrystal, segregation PVF are made.
(2) ultrasonic wave receive transducer 2：Described ultrasonic wave receive transducer 2 and described ultrasound transmitting transducer 1
It is angled, the ultrasonic wave that target sound source is reflected back can be captured.Described ultrasonic wave receive transducer 2 can use single
PZT (piezoelectric transducer), it would however also be possible to employ the piezoelectric transducer array being made up of multiple PZT (piezoelectric transducer)s.In actual applications, it is described
PZT (piezoelectric transducer) can be using piezoelectrics such as lead titanate piezoelectric ceramics of the prior art, piezoelectric monocrystal, segregation PVFs
The transducer being made.
(3) circuit 3 is controlled：Described control circuit 3 can include that ultrasonic wave emission control module, ultrasonic wave receive control
Module and data acquisition resolve module.Ultrasonic wave emission control module is electrically connected with ultrasound transmitting transducer 1, and controls ultrasound
The active of ripple transmitting transducer 1 launches ultrasonic wave to target sound source, for example：Ultrasonic wave emission control module can control ultrasonic wave to send out
Penetrate the incident angle of transmission power, ultrasonic frequency and ultrasonic wave to target sound source of transducer 1.Ultrasonic wave receives control mould
Block is electrically connected with ultrasonic wave receive transducer 2, and controls ultrasonic wave receive transducer 2 to receive the ultrasound that the target sound source is reflected back
Ripple.Data acquisition resolves module and obtains the ultrasonic wave that the target sound source of the reception of ultrasonic wave receive transducer 2 is reflected back, and demodulates institute
The phase information of the ultrasonic wave that target sound source is reflected back is stated, so that it is determined that go out the vibration information of the target sound source, then to the mesh
The vibration information for marking sound source is analyzed calculating, so as to draw the radiated sound field information of the target sound source.In actual applications, number
Resolving module according to collection can realize that the ultrasonic wave being reflected back to target sound source carries out data acquisition, analog-to-digital conversion, differentiator and phase comparator, mesh
Mark the treatment such as the radiated sound field information resolving of sound source.
Specifically, the new operation principle without the active microphone of vibrating diaphragm is as follows：Sound come from sound source vibration and its
Medium (including：Solid propagation medium, liquid transmissive medium and gas propagation medium) the middle pressure wave for producing and propagating.According to sound
Basic theory is learned, can be resolved using sound source vibration information and be obtained its radiation fields information, so as to obtain the biography with sound wave as carrier
Broadcast information.It is provided by the present invention it is new without the active microphone of vibrating diaphragm and be provided without the diaphragm structure of traditional microphones, be not
Passive to receive sound field sound pressure signal, but actively launch ultrasonic wave to target sound source, according to Doppler effect, target sound source is shaken
Dynamic to produce phase-modulation to incident ultrasonic wave, the phase information of the ultrasonic wave being then reflected back to target sound source is solved
Adjust, it is possible to obtain target sound source vibration information (Phase Demodulation Method of Optic of the ultrasonic wave that target sound source is reflected back has many kinds,
For example：By differentiator and phase comparator, first differential is carried out to reflectance ultrasound ripple phase-modulated signal and obtains amplitude modulation and phase modulation signal, then using half
Ripple detection, peak detection obtain the first derivative of target sound source vibration signal, are reducible target sound finally by Integral Processing
The vibration information in source), then calculating is analyzed (for example to the vibration information of the target sound source：Can be public based on Helmholtz
Formula is analyzed calculating using the method for integral formula solution), you can by the vibration information (acceleration or speed amount) of target sound source
Resolve and obtain radiated sound field information.
As fully visible, the embodiment of the present invention and insensitive sound pressure information, therefore, it is possible to effectively suppress environmental background noise
Influence, increases the signal to noise ratio of target acoustic signal, and this is advantageous to lift acoustic intelligence systematic entirety energy.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any one skilled in the art in the technical scope of present disclosure, the change or replacement that can be readily occurred in,
Should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be defined.
Claims (5)
1. a kind of new without the active microphone of vibrating diaphragm, it is characterised in that including：Ultrasound transmitting transducer (1), ultrasonic wave connect
Receive transducer (2) and control circuit (3)；
Control circuit (3) is electrically connected with ultrasound transmitting transducer (1) and ultrasonic wave receive transducer (2) respectively, and is controlled super
Soic wave transmitting energy converter (1) actively launches ultrasonic wave to target sound source, while controlling ultrasonic wave receive transducer (2) to receive the mesh
The ultrasonic wave that mark sound source is reflected back, and the vibration letter of the target sound source is determined according to the ultrasonic wave that the target sound source is reflected back
Breath, then calculating is analyzed to the vibration information of the target sound source, so as to draw the radiated sound field information of the target sound source.
2. it is according to claim 1 new without the active microphone of vibrating diaphragm, it is characterised in that described control circuit (3)
Control module is received including ultrasonic wave emission control module, ultrasonic wave and data acquisition resolves module；
Ultrasonic wave emission control module is electrically connected with ultrasound transmitting transducer (1), and controls ultrasound transmitting transducer (1) main
Trend target sound source launches ultrasonic wave；
Ultrasonic wave receives control module and is electrically connected with ultrasonic wave receive transducer (2), and controls ultrasonic wave receive transducer (2) to connect
Receive the ultrasonic wave that the target sound source is reflected back；
Data acquisition resolves module and obtains the ultrasonic wave that the target sound source of ultrasonic wave receive transducer (2) reception is reflected back, and solves
The phase information of the ultrasonic wave that the target sound source is reflected back is adjusted, so that it is determined that go out the vibration information of the target sound source, then to institute
The vibration information for stating target sound source is analyzed calculating, so as to draw the radiated sound field information of the target sound source.
3. it is according to claim 2 new without the active microphone of vibrating diaphragm, it is characterised in that described ultrasonic wave transmitting control
Incidence of the transmission power, ultrasonic frequency and ultrasonic wave of molding block control ultrasound transmitting transducer (1) to target sound source
Angle.
4. it is according to any one of claim 1 to 3 new without the active microphone of vibrating diaphragm, it is characterised in that described super
Soic wave transmitting energy converter (1) is single PZT (piezoelectric transducer) or the piezoelectric transducer array being made up of multiple PZT (piezoelectric transducer)s.
5. it is according to any one of claim 1 to 3 new without the active microphone of vibrating diaphragm, it is characterised in that described super
Acoustic receiver transducer (2) is single PZT (piezoelectric transducer) or the piezoelectric transducer array being made up of multiple PZT (piezoelectric transducer)s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710245254.3A CN106937227B (en) | 2017-04-14 | 2017-04-14 | Novel active microphone without vibrating diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710245254.3A CN106937227B (en) | 2017-04-14 | 2017-04-14 | Novel active microphone without vibrating diaphragm |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106937227A true CN106937227A (en) | 2017-07-07 |
| CN106937227B CN106937227B (en) | 2019-12-10 |
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ID=59437317
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710245254.3A Active CN106937227B (en) | 2017-04-14 | 2017-04-14 | Novel active microphone without vibrating diaphragm |
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| Country | Link |
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| CN (1) | CN106937227B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220165246A1 (en) * | 2020-11-20 | 2022-05-26 | Hyundai Motor Company | Force generating device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202551276U (en) * | 2012-03-14 | 2012-11-21 | 赖建新 | Microphone |
| CN104581492A (en) * | 2015-01-16 | 2015-04-29 | 苏州触达信息技术有限公司 | Headset capable of producing ultrasonic waves and multimedia device with headset |
| CN104852770A (en) * | 2014-02-17 | 2015-08-19 | 得琦电子股份有限公司 | Supersonic data transmission system |
| US20160192069A1 (en) * | 2014-12-29 | 2016-06-30 | Sound Devices, LLC | Motion detection for microphone gating |
-
2017
- 2017-04-14 CN CN201710245254.3A patent/CN106937227B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202551276U (en) * | 2012-03-14 | 2012-11-21 | 赖建新 | Microphone |
| CN104852770A (en) * | 2014-02-17 | 2015-08-19 | 得琦电子股份有限公司 | Supersonic data transmission system |
| US20160192069A1 (en) * | 2014-12-29 | 2016-06-30 | Sound Devices, LLC | Motion detection for microphone gating |
| CN104581492A (en) * | 2015-01-16 | 2015-04-29 | 苏州触达信息技术有限公司 | Headset capable of producing ultrasonic waves and multimedia device with headset |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220165246A1 (en) * | 2020-11-20 | 2022-05-26 | Hyundai Motor Company | Force generating device |
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| Publication number | Publication date |
|---|---|
| CN106937227B (en) | 2019-12-10 |
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