CN107131054A - Active noise reduction system and device in a kind of Automobile - Google Patents
Active noise reduction system and device in a kind of Automobile Download PDFInfo
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- CN107131054A CN107131054A CN201710285927.8A CN201710285927A CN107131054A CN 107131054 A CN107131054 A CN 107131054A CN 201710285927 A CN201710285927 A CN 201710285927A CN 107131054 A CN107131054 A CN 107131054A
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- 230000009467 reduction Effects 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 26
- 238000009413 insulation Methods 0.000 claims description 23
- 230000001105 regulatory effect Effects 0.000 claims description 16
- 108091000080 Phosphotransferase Proteins 0.000 claims description 15
- 102000020233 phosphotransferase Human genes 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 description 12
- 239000012814 acoustic material Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 102000001253 Protein Kinase Human genes 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 108060006633 protein kinase Proteins 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/11—Thermal or acoustic insulation
- F02B77/13—Acoustic insulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Signal Processing (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
The invention discloses active noise reduction system and device in a kind of Automobile, including an at least microphone, for original noise signal in collecting vehicle；One signals reverse process circuit, the noise signal for microphone to be gathered is converted into the reverse noise signal of phase；One power amplifier module, for amplifying the reverse noise signal of the phase to the amplitude of original noise signal；One acoustical generator, for export in the car with the reverse amplitude identical sound wave of original noise signal phase, microphone, signals reverse process circuit, power amplifier module and acoustical generator are sequentially connected.Compact conformation of the present invention, occupies little space, and can measure the rotating speed of engine and determine noise fundamental frequency, and carries out noise reduction mainly for the noise of engine, the noise of whole in-car is effectively reduced, using in extensive range.
Description
Technical field
The present invention relates to vehicle electric field, and in particular to active noise reduction system, device and method in a kind of Automobile
Background technology
In car steering and taking, in order to obtain a more quiet comfortable environment, away from noisy noise (such as:
Engine roar, car body vibrating noise) puzzlement is that people are pursued, conventional automobile industry is in order to eliminate the logical of in-car noise
The vehicle-mounted air resistance coefficient of reduction with way, such as hood, tire periphery, the inferior generation noise of case cover position
Add substantial amounts of acoustic material and carry out physics noise reduction, yet with physics noise reduction depend on acoustic material the characteristic of itself and
The consumption of material, and the development of materialogy is relatively slow, increases acoustic material simply and also brings burden to car weight so that vapour
The noise eradicating efficacy of car has been absorbed in bottleneck.
Active noise eliminates system abbreviation ANC (Active Noise Cancelling), is adaptively calculated by using acoustics
Method produces with an anti-phase anti-sound or anti-noise to eliminate unwanted sound.Original, undesired sound exists with anti-sound
It is acoustically superimposed, so that it may while eliminating both sound.It is provided with main microphon, auxiliary microphone, main microphon primary filtering
The primary filtration module of module, auxiliary microphone, noise trend pass filtering module, nonlinear scattering noise filtering module, time-frequency sky statistics
Separation module and human ear reverse engineering module, main microphon are connected with the primary filtration module of main microphon, auxiliary microphone and auxiliary wheat
The primary filtration module connection of gram wind, main microphon primary filtration module, the primary filtration module of auxiliary microphone and noise trend pass filtering
Module is connected, and noise trend pass filtering module is connected with nonlinear scattering noise filtering module, nonlinear scattering noise filtering module
It is connected with time-frequency sky statistics separation module, time-frequency sky statistics separation module is connected with human ear reverse engineering module.
The characteristic of of acoustic material itself and the consumption of material, and the development phase of materialogy are depended on due to physics noise reduction
When slow, increase acoustic material simply and burden also is brought to car weight so that the noise eradicating efficacy of automobile has been absorbed in bottleneck.
Complicated, space-consuming is larger, and carries out noise reduction without the noise for engine, and noise reduction is undesirable.
Active noise reduction system is mainly used in the noise reduction of headphone at this stage, and this mode can be good at suppression environment and make an uproar
Sound, but its effective working space scope is small, can only realize that the small range noise of earphone is eliminated, but for larger in Automobile
Space can not then reach preferable noise reduction.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of compact conformation, occupy little space, and can measure engine
Rotating speed and determine noise fundamental frequency, and carry out noise reduction mainly for the noise of engine, effectively reduce the noise of whole in-car,
Using in extensive range.
The present invention is achieved through the following technical solutions：Active noise reduction system in a kind of Automobile, including at least one
Microphone, for original noise signal in collecting vehicle；One signals reverse process circuit, the noise for microphone to be gathered is believed
Number it is converted into the reverse noise signal of phase；One power amplifier module, believes for amplifying the reverse noise signal of the phase to original noise
Number amplitude；One acoustical generator, for export in the car with the reverse amplitude identical sound wave of original noise signal phase, microphone,
Signals reverse process circuit, power amplifier module and acoustical generator are sequentially connected.
Active noise reducing device in a kind of Automobile, including feedforward microphone, error microphone, make an uproar for original in collecting vehicle
Message number, the feedforward microphone and error microphone are separately mounted in the closed sound insulation pipeline of one end open, and feedover Mike
Wind is arranged on the blind end of sound insulation pipeline, and error microphone is arranged on the openend of sound insulation pipeline, and the stage casing of sound insulation pipeline is installed
There is the noise loudspeaker towards openend, the stage casing of sound insulation pipeline is provided with a closed sound insulation branch pipe, closed sound insulation branch pipe
Noise reduction loudspeaker towards sound insulation pipeline is installed, error microphone is connected with an input of preamplifier, preposition
Another input of amplifier is connected with feedforward microphone, and noise reduction loudspeaker is connected with an output end of power amplifier module
Connect, another output end of power amplifier module is connected with noise loudspeaker, the input of Signal-regulated kinase, which is connected to, makes an uproar
Tone generator, signal generator and engine speed measuring device, the output end of preamplifier and DSP module input
End is connected, and Signal-regulated kinase is also connected with an input port of DSP module, the output end of DSP module also with signal
One input port of conditioning module is connected.
Also include a signal processing module, signal processing module is by sound separator, ANC controllers and the part of mixer three
Constitute, an output end of Signal-regulated kinase and preamplifier is connected with sound separator respectively, Signal-regulated kinase
Input with another output end of preamplifier respectively with ANC controllers is connected, the output end end of sound separator
Be connected with the input of ANC controllers, the output end of ANC controllers is connected with the input of mixer, mixer it is defeated
Go out end with an input of Signal-regulated kinase to be connected.
A kind of noise-reduction method suitable in Automobile, specifically includes following steps：
Step 1: appropriate location loads the microphone of certain amount in compartment, for picking up the noise signal of in-car；
Analyzed, compensated, compared and made Step 2: the noise signal picked up is sent into signals reverse process circuit
The reverse 180 degree processing of its phase；
Analyzed, compensated, being compared Step 3: sending into the noise signal picked up in signals reverse process circuit after processing
Pair and make the processing of its phase reverse 180 degree.
As preferred technical scheme, noise signal reverse process circuit high speed, high accuracy reduction noise should be believed as far as possible
Number, and whole environment inside car structure will do corresponding calculating test acoustic characteristic, and noise signal process circuit is adjusted further according to actual.
The beneficial effects of the invention are as follows：The present invention is measured simultaneously by engine speed measuring device to engine speed
Engine noise fundamental frequency is determined, acoustics adaptive algorithm is reused, two frequencies are identical with amplitude, phase difference 180 degree
It can cancel out each other, be produced with an effective counteracting of the anti-phase anti-sound realization to noise, effectively reduction after sine wave signal superposition
Noise, a relatively quiet environment inside car needed for obtaining us, while the music that the MP3 required for remaining in-car is played
Sound, in-car Conversation Voice.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is ANC active noise reduction schematic diagrams；
Fig. 2 is systematic schematic diagram of the invention；
Fig. 3 has ANC and the line curve figure without ANC for the present invention.
Embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine in any way.
Any feature disclosed in this specification (including any accessory claim, summary and accompanying drawing), except non-specifically is chatted
State, can alternative features equivalent by other or with similar purpose replaced.I.e., unless specifically stated otherwise, each feature
It is an example in a series of equivalent or similar characteristics.
As shown in figure 1, ANC active noise reduction principles are based on the sine that two frequencies are identical with amplitude, phase differs 180 degree
It can be cancelled out each other after ripple Signal averaging, it is not limited by the length of wavelength, just can realize that in-car noise eliminates effect using this principle
Really, solid line is noise signal in figure, and dotted line is the reverse signal after processing.
As shown in Fig. 2 including being sequentially connected with:An at least microphone, for original noise signal in collecting vehicle；One signal
Reverse process circuit, the noise signal for microphone to be gathered is converted into the reverse noise signal of phase；One power amplifier module, is used
In the amplitude of the amplification reverse noise signal of phase to original noise signal；One acoustical generator, for export in the car with it is original
The reverse amplitude identical sound wave of noise signal phase.
Specifically implementation is:Appropriate location loads the microphone (MIC) of certain amount in compartment, for picking up car
Interior noise signal, the noise signal picked up is sent into signals reverse process circuit and is analyzed, compensated, compared and making it
After the reverse 180 degree processing of phase, sent and most original noise phase by loudspeaker after the power amplifier module amplification for giving vehicle-mounted interior device
Reverse amplitude identical sound wave, so as to eliminate the noise in whole compartment closed-loop system.
Because this is the process of a feedback, so in some cases, closed-loop system may be unstable.So noise
Signals reverse process circuit should high speed, high accuracy reduction noise signal, and whole environment inside car structure will do mutually accrued as far as possible
Test acoustic characteristic is calculated, noise signal process circuit is adjusted further according to actual, the in-car noise in part can be finally eliminated well and is reached
To the effect of our noise reductions, as shown in Figure 3.
Wherein, whole device includes feedforward microphone, error microphone, described for original noise signal in collecting vehicle
Feedforward microphone and error microphone are separately mounted in the closed sound insulation pipeline of one end open, and feedforward microphone is arranged on sound insulation
The blind end of pipeline, error microphone is arranged on the openend of sound insulation pipeline, and the stage casing of sound insulation pipeline is provided with towards openend
Noise loudspeaker, the stage casing of sound insulation pipeline be provided with a closed sound insulation branch pipe, closed sound insulation branch pipe be provided with towards every
The noise reduction loudspeaker in sound tube road, error microphone is connected with an input of preamplifier, preamplifier it is another
Individual input is connected with feedforward microphone, and noise reduction loudspeaker is connected with an output end of power amplifier module, power amplifier module
Another output end is connected with noise loudspeaker, and the input of Signal-regulated kinase is connected to noisemaker, signal
Generator and engine speed measuring device, the output end of preamplifier are connected with DSP module input, signal
Conditioning module is also connected with an input port of DSP module, one also with Signal-regulated kinase of the output end of DSP module
Input port is connected.
Signals reverse process circuit, the noise signal for microphone to be gathered is converted into the reverse noise signal of phase,
The signal processing module is made up of sound separator, ANC controllers and the part of mixer three, Signal-regulated kinase and preceding storing
One output end of big device is connected with sound separator respectively, another output end of Signal-regulated kinase and preamplifier
The input with ANC controllers is connected respectively, and the output end end of sound separator is connected with the input of ANC controllers,
The output end of ANC controllers is connected with the input of mixer, the output end of mixer and the one of Signal-regulated kinase it is defeated
Enter end to be connected；Power amplifier module, for amplifying the reverse noise signal of the phase to the amplitude of original noise signal；Acoustical generator,
For exporting in the car and the reverse amplitude identical sound wave of original noise signal phase.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
The change or replacement expected without creative work, should all be included within the scope of the present invention.Therefore, it is of the invention
Protection domain should be determined by the scope of protection defined in the claims.
Claims (5)
1. active noise reduction system in a kind of Automobile, it is characterised in that：Including an at least microphone, made an uproar for original in collecting vehicle
Message number；One signals reverse process circuit, the noise signal for microphone to be gathered is converted into the reverse noise signal of phase；
One power amplifier module, for amplifying the reverse noise signal of the phase to the amplitude of original noise signal；One acoustical generator, in car
It is interior output with the reverse amplitude identical sound wave of original noise signal phase, microphone, signals reverse process circuit, power amplifier module with
And acoustical generator is sequentially connected.
2. active noise reducing device in a kind of Automobile, it is characterised in that：Including feedforward microphone, error microphone, for gathering
In-car original noise signal, the feedforward microphone and error microphone are separately mounted to the closed sound insulation pipeline of one end open
In, feedforward microphone is arranged on the blind end of sound insulation pipeline, and error microphone is arranged on the openend of sound insulation pipeline, sound insulation pipeline
Stage casing noise loudspeaker towards openend is installed, the stage casing of sound insulation pipeline is provided with a closed sound insulation branch pipe, closed
Noise reduction loudspeaker towards sound insulation pipeline, error microphone and an input phase of preamplifier are installed in sound insulation branch pipe
Connection, another input of preamplifier is connected with feedforward microphone, and one of noise reduction loudspeaker and power amplifier module is defeated
Go out end to be connected, another output end of power amplifier module is connected with noise loudspeaker, the input difference of Signal-regulated kinase
It is connected with noisemaker, signal generator and engine speed measuring device, the output end of preamplifier and DSP module
One input is connected, and Signal-regulated kinase is also connected with an input port of DSP module, the output end of DSP module
Also it is connected with an input port of Signal-regulated kinase.
3. active noise reducing device in Automobile as claimed in claim 2, it is characterised in that：Also include a signal processing module,
Signal processing module is made up of sound separator, ANC controllers and the part of mixer three, Signal-regulated kinase and preamplifier
An output end be connected respectively with sound separator, another output end of Signal-regulated kinase and preamplifier difference
It is connected with the input of ANC controllers, the output end end of sound separator is connected with the input of ANC controllers, ANC controls
The output end of device processed is connected with the input of mixer, the output end of mixer and Signal-regulated kinase input phase
Connection.
4. a kind of noise-reduction method suitable in Automobile, it is characterised in that specifically include following steps：
Step 1: appropriate location loads the microphone of certain amount in compartment, for picking up the noise signal of in-car；
Its phase is analyzed, is compensated, compared and is made Step 2: the noise signal picked up is sent into signals reverse process circuit
Position reversely 180 degree processing；
Analyzed, compensated, being compared simultaneously Step 3: sending into the noise signal picked up in signals reverse process circuit after processing
Make the reverse 180 degree processing of its phase.
5. noise-reduction method as claimed in claim 4, it is characterised in that：Noise signal reverse process circuit should as far as possible at a high speed,
High accuracy reduction noise signal, and whole environment inside car structure will do corresponding calculating test acoustic characteristic, further according to actual adjustment
Noise signal process circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710285927.8A CN107131054A (en) | 2017-04-27 | 2017-04-27 | Active noise reduction system and device in a kind of Automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710285927.8A CN107131054A (en) | 2017-04-27 | 2017-04-27 | Active noise reduction system and device in a kind of Automobile |
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| CN107131054A true CN107131054A (en) | 2017-09-05 |
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| CN201710285927.8A Pending CN107131054A (en) | 2017-04-27 | 2017-04-27 | Active noise reduction system and device in a kind of Automobile |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108189724A (en) * | 2018-01-03 | 2018-06-22 | 上海工程技术大学 | A kind of automobile feedback control active noise reduction neckpillow |
| CN108462920A (en) * | 2018-03-16 | 2018-08-28 | 吉林航盛电子有限公司 | Vehicle power amplifier device with decrease of noise functions and hoot device |
| CN109686356A (en) * | 2018-11-14 | 2019-04-26 | 上海迪彼电子科技有限公司 | A kind of vehicle power amplifier integrated system of ANC active noise reduction |
| CN109994099A (en) * | 2019-03-18 | 2019-07-09 | 佛山市云米电器科技有限公司 | A kind of bedroom active noise reducing device and the bedroom with the active noise reducing device |
| CN110126840A (en) * | 2019-04-23 | 2019-08-16 | 江苏大学 | Interior engine multitone imitates active control system |
| CN111035323A (en) * | 2019-12-17 | 2020-04-21 | 上海岚豹智能科技有限公司 | Method, equipment and system for actively reducing noise of sweeping robot |
| CN111508463A (en) * | 2019-01-30 | 2020-08-07 | 保时捷股份公司 | Method for actively reducing noise in an electric or hybrid vehicle and correspondingly equipped vehicle |
| CN111627414A (en) * | 2019-02-28 | 2020-09-04 | 上海汽车集团股份有限公司 | Active denoising method and device and electronic equipment |
| CN112687256A (en) * | 2019-10-17 | 2021-04-20 | 中车长春轨道客车股份有限公司 | Noise reduction system, method and vehicle |
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| CN201177964Y (en) * | 2008-01-30 | 2009-01-07 | 联创汽车电子有限公司 | In-vehicle active sound eliminating system |
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| CN203150113U (en) * | 2013-03-12 | 2013-08-21 | 徐华中 | Active noise reduction apparatus for automobile |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108189724A (en) * | 2018-01-03 | 2018-06-22 | 上海工程技术大学 | A kind of automobile feedback control active noise reduction neckpillow |
| CN108462920A (en) * | 2018-03-16 | 2018-08-28 | 吉林航盛电子有限公司 | Vehicle power amplifier device with decrease of noise functions and hoot device |
| CN109686356A (en) * | 2018-11-14 | 2019-04-26 | 上海迪彼电子科技有限公司 | A kind of vehicle power amplifier integrated system of ANC active noise reduction |
| CN111508463A (en) * | 2019-01-30 | 2020-08-07 | 保时捷股份公司 | Method for actively reducing noise in an electric or hybrid vehicle and correspondingly equipped vehicle |
| CN111627414A (en) * | 2019-02-28 | 2020-09-04 | 上海汽车集团股份有限公司 | Active denoising method and device and electronic equipment |
| CN111627414B (en) * | 2019-02-28 | 2024-01-30 | 上海汽车集团股份有限公司 | Active denoising method and device and electronic equipment |
| CN109994099A (en) * | 2019-03-18 | 2019-07-09 | 佛山市云米电器科技有限公司 | A kind of bedroom active noise reducing device and the bedroom with the active noise reducing device |
| CN110126840A (en) * | 2019-04-23 | 2019-08-16 | 江苏大学 | Interior engine multitone imitates active control system |
| CN112687256A (en) * | 2019-10-17 | 2021-04-20 | 中车长春轨道客车股份有限公司 | Noise reduction system, method and vehicle |
| CN111035323A (en) * | 2019-12-17 | 2020-04-21 | 上海岚豹智能科技有限公司 | Method, equipment and system for actively reducing noise of sweeping robot |
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