CN105513585B - A kind of automobile active denoising method and system - Google Patents
A kind of automobile active denoising method and system Download PDFInfo
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- CN105513585B CN105513585B CN201510845558.4A CN201510845558A CN105513585B CN 105513585 B CN105513585 B CN 105513585B CN 201510845558 A CN201510845558 A CN 201510845558A CN 105513585 B CN105513585 B CN 105513585B
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
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- Acoustics & Sound (AREA)
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Abstract
The invention discloses a kind of automobile active denoising method and system, described automobile active denoising method includes: the position sat by personnel in the pressure transducer detection compartment that is arranged in automotive seat；By the source of sound being arranged in the mike of diverse location gathers compartment in compartment；Estimate the central area that personnel institute seat in compartment is put；Open car audio system, the central area of occupant position is carried out active noise reduction.The present invention uses car audio system to carry out active noise reduction, and effectively the noise of personnel's seating position in reduction compartment, improves riding quality.
Description
Technical field
The present invention relates to automotive engineering, particularly relate to a kind of automobile active denoising method and system.
Background technology
The noise of automobile mostlys come from that make an uproar in road, tire is made an uproar, wind is made an uproar and several aspects such as engine noise, automobile
Noise control in compartment, is a part critically important in automotive engineering, particularly to Advanced Sedan Car,
Vehicle cabin noise is controlled all have the highest requirement.And the noise suppression master in prior art, in automobile bodies
If by improving compartment sealing, the shock mitigation system on chassis, the soundproof effect of enging cabin and selecting quiet
Phonic wheel tire etc..Above-mentioned technology belongs to passive noise reduction technology, and it can reduce the noise decibel in compartment really,
But the limitation of its noise reduction, particularly when galloping, the noise in compartment is the strongest.
Summary of the invention
For solving above-mentioned technical problem, the present invention provides a kind of automobile active denoising method, for fall further
Noise in low automobile bodies, improves the riding comfort of passenger.
The present invention is achieved in that
A kind of automobile active denoising method, including:
The position sat by personnel in the pressure transducer that is arranged in automotive seat detection compartment；
By the source of sound being arranged in the mike of diverse location gathers compartment in compartment；
Estimate the central area that personnel institute seat in compartment is put；
Open car audio system, the central area of occupant position is carried out active noise reduction.
Further, open car audio system, the central area of occupant position is carried out actively
Before noise reduction, also include:
The noise of occupant position is isolated according to the source of sound collected；
The position, the acoustic centre of source, field that in calculating compartment, the noise of everyone position is formed；And
Analyze the spectrogram of described noise；
Described unlatching car audio system, carries out active noise reduction to the central area of occupant position,
Including:
Opening car audio system, sound field center to the described noise adjusting car audio system is formed
Position, the acoustic centre of source, field；
Produce and differ the suppression ripple of 180 degree with the frequency of described noise and amplitude same phase noise is dropped
Make an uproar.
Further, A post, B post, C post, ceiling and the side that described mike is arranged in automobile bodies
On dish.
Further, described car audio system includes that multiple speaker, described speaker are arranged in compartment
Qianmen, back door, console, ceiling and front-row seats back on.
Further, at described unlatching car audio system, the central area of occupant position is entered
After row active noise reduction, also include:
Obtain automobile current driving speed；
Inquire about the synopsis that this automobile speed is made an uproar with wind, obtain the wind in the compartment corresponding to automobile current vehicle speed
Make an uproar；
Control each speaker of car audio system and produce the frequency and amplitude is identical but phase of making an uproar with described wind
The suppression ripple of 180 degree carries out actively wind and makes an uproar suppression.
For solving above-mentioned technical problem, another technical scheme that the present invention provides is:
A kind of automobile active noise reduction system, including:
It is arranged at the mike of diverse location in compartment, for gathering the source of sound in compartment；
The pressure transducer being arranged in automotive seat, the position that personnel are sat in detecting compartment；
Control unit, is connected to described mike and pressure transducer, and in being used for estimating compartment, personnel are sat
The central area of position, and control car audio system the central area of occupant position is carried out
Active noise reduction.
Further, described control unit includes that source of sound analyzes module and computing module；
Described source of sound analyzes module for isolating making an uproar of occupant position according to the source of sound collected
Sound and the spectrogram of calculating noise；
The described computing module position, the acoustic centre of source, field that the noise of everyone position is formed in calculating compartment
Put；
Described car audio system includes sound field center adjustment unit and noise suppressed sound generation unit；
Described sound field center adjustment unit is used for opening car audio system, adjusts car audio system
The position, the acoustic centre of source, field that sound field center to described noise is formed；
Described noise suppressed sound generation unit differs with frequency and the amplitude same phase of described noise for producing
The suppression ripple of 180 degree carries out noise reduction to noise.
Further, A post, B post, C post, ceiling and the side that described mike is arranged in automobile bodies
On dish.
Further, described car audio system includes that multiple speaker, described speaker are arranged in compartment
Qianmen, back door, console, ceiling and front-row seats back on.
Further, described control unit is additionally operable to obtain automobile current driving speed, inquires about this automobile speed
The synopsis made an uproar with wind, the wind obtained in the compartment corresponding to automobile current vehicle speed is made an uproar, and is controlled automobile sound
The each speaker of acoustic system produce make an uproar with described wind frequency and amplitude is identical but suppression ripple of phase 180 degree enters
Row actively wind is made an uproar suppression.
The invention have the benefit that the present invention detects compartment by the pressure transducer being arranged in seat
The position of interior personnel, by the source of sound in mike detection compartment, and by car audio system to vehicle occupant
Member position carries out active noise reduction, and in noise-reduction method of the present invention, the noise reduction of sound equipment is arranged can be according to vehicle occupant
Number and the position sat of member adjust flexibly, can obviously reduce the noise of occupant position,
Improve the riding quality of automobile；Noise reduction process of the present invention can be carried out automatically, it is not necessary to manual operation, use intelligence,
Convenient.
Accompanying drawing explanation
Fig. 1 is the flow chart of an embodiment of the present invention automobile active denoising method；
Fig. 2 is the module frame chart of another embodiment automobile active noise reduction system of the present invention.
Label declaration:
10, control unit；20, mike；30 car audio systems；40, pressure passes
Sensor.
Detailed description of the invention
By describing the technology contents of the present invention, structural feature in detail, being realized purpose and effect, below in conjunction with
Embodiment also coordinates accompanying drawing to be explained in detail.
Refer to Fig. 1, embodiment of the present invention, a kind of automobile active denoising method, including:
S1, the position sat by personnel in the pressure transducer that is arranged in automotive seat detection compartment；
S2, by the source of sound being arranged in the mike of diverse location gathers compartment in compartment；
S3, estimate the central area that personnel institute seat in compartment is put；
S4, unlatching car audio system, carry out active noise reduction to the central area of occupant position.
Present embodiment automobile active denoising method is active noise reduction, and it utilizes the pressure sensing being placed in seat
Device detects the position of personnel in compartment, and by the source of sound in mike detection compartment, (source of sound includes people's
Sound and noise), wherein, the number of mike is more than or equal to four, and mike is different in being arranged at compartment
Position, it is preferred that A post that described mike is arranged in automobile bodies, B post, C post, ceiling and
On steering wheel.Described car audio system includes multiple speaker, before described speaker is arranged in compartment
On door, back door, console, ceiling and front-row seats back.Present embodiment passes through car audio system pair
Occupant position carries out active noise reduction, and in noise-reduction method of the present invention, the noise reduction of sound equipment is arranged can basis
The number of occupant and the position sat adjust flexibly, can obviously reduce occupant position
Noise, improve automobile riding quality；Noise reduction process of the present invention can be carried out automatically, it is not necessary to manual operation,
It is intelligent, convenient to use.
In the present embodiment, at described S4, car audio system is opened, to occupant position
Before central area carries out active noise reduction, also include:
The noise of occupant position is isolated according to the source of sound collected；
The position, the acoustic centre of source, field that in calculating compartment, the noise of everyone position is formed；And
Analyze the spectrogram of described noise；
Described unlatching car audio system, carries out active noise reduction to the central area of occupant position,
Including:
Opening car audio system, sound field center to the described noise adjusting car audio system is formed
Position, the acoustic centre of source, field；
Produce and differ the suppression ripple of 180 degree with the frequency of described noise and amplitude same phase noise is dropped
Make an uproar.
Therefore, the noise reduction mode used in the present embodiment is different from other audio defeat, this enforcement
Mode is not the object with whole compartment as noise reduction, but with the position at personnel place in compartment for noise reduction object,
If i.e. only one people of driver in car, the most only analyze the noise of the person's of driving seat difference, and using this region as
The object of sound system noise reduction, if only driver's seat and front passenger's seat have personnel, then with first row in compartment
The region at seat place is noise reduction region.In the noise-reduction method of the present invention, the noise reduction of sound system arranges and is as
Personnel in compartment are distributed the different and change of noise and change, thus substantially increase the flexible of noise reduction setting
Property and substantially increase the noise reduction of personnel position, improves the riding quality of automobile.
Because the frequency of the sound of people and the noise of Che Nei is to have significantly difference, therefore by the source of sound gathered
Carry out spectrum analysis and can distinguish the voice in source of sound and noise.
Therefore, the sound of the described people collected according to different mikes also can calculate occupant place
Position, specifically can comprise the following steps that
Analyze the frequency spectrum of the sound of the people that each mike is collected；
Calculate the acquisition time of the sound of the identical people of each mike medium frequency；
The acquisition time difference of the sound of the people arranging position and same frequency according to each mike calculates this
The position at the voice place of frequency.
Wherein, the audible frequency of people at 100Hz (bass) in the range of 10000Hz (soprano), and
The frequency that people speaks in compartment mainly concentrates on 250Hz to 750Hz, and the frequency of noise is to compare even
Continue and not in the range of said frequencies, therefore can be analyzed the sound of people by spectrum analysis.
In the present embodiment, when the collection of the described sound calculating the identical people of each mike medium frequency
Between point after, also include:
Calculate the volume of the sound of the identical people of each mike medium frequency；
Acquisition time difference at the position according to each mike and the sound of the people of same frequency calculates this frequency
After the position at the voice place of rate, also include:
Position according to each mike and the sound of same frequency people volume in different mikes are to described
The position at the voice place calculated is verified.
Owing to when sound is propagated in atmosphere, decay is obvious, according to permissible by comparing volume
General judges that sounding point receives the distance of point away from sound.Present embodiment by each mike collect same
The volume of the sound of the people of one frequency, the sounding position judging this sound that can be general, therefore by not
With the volume in mike, the position at the described voice place calculated is carried out checking can be effectively ensured in car
The accuracy that personnel positions calculates.
Owing in the compartment of automobile, noise is closely related with the travel speed of automobile, when car speed is bigger,
Noise in compartment is mainly again wind and makes an uproar, therefore, in one embodiment, to occupant position
After central area carries out active noise reduction, also according to current vehicle speed whole compartment endogenous wind can be made an uproar and carry out actively dropping
Make an uproar, specifically include:
Automobile current driving speed is obtained from the CAN of automobile；
Pre-build that the speed of this vehicle and compartment endogenous wind are made an uproar the synopsis of corresponding relation, inquire about this automobile speed
The synopsis made an uproar with wind, can obtain the wind in the compartment corresponding to automobile current vehicle speed and make an uproar value；
Control each speaker of car audio system the most again to produce wind suppression ripple of making an uproar and carry out wind and make an uproar active suppression, institute
State wind and make an uproar that the frequency of suppression ripple is identical with amplitude and described wind is made an uproar identical, but phase 180 degree.
In this embodiment, (the described preliminary device that actively drops is i.e. for enter according to speed to use preliminary active noise reduction
Sector-style is made an uproar suppression) (the described accurate noise reduction i.e. noise of testing staff position also drops with accurate noise reduction
Make an uproar) combine, thus the effect of active noise reduction in further increasing car.
Referring to Fig. 2, another embodiment of the present invention is a kind of automobile active noise reduction system, including:
It is arranged at the mike 20 of diverse location in compartment, for gathering the source of sound in compartment；
The pressure transducer 40 being arranged in automotive seat, the position that personnel are sat in detecting compartment；
Control unit 10, is connected to described mike 20 and pressure transducer 40, and control unit 10 is used for estimating
Calculate the central area that personnel institute seat in compartment is put, and control car audio system 30 to occupant institute
Active noise reduction is carried out in the central area of position.
Wherein, described control unit 10 includes that source of sound analyzes module and computing module；
Described source of sound analyzes module for isolating making an uproar of occupant position according to the source of sound collected
Sound and the spectrogram of calculating noise；
The described computing module position, the acoustic centre of source, field that the noise of everyone position is formed in calculating compartment
Put；
Described car audio system includes sound field center adjustment unit and noise suppressed sound generation unit；
Described sound field center adjustment unit is used for opening car audio system, adjusts car audio system
The position, the acoustic centre of source, field that sound field center to described noise is formed；
Described noise suppressed sound generation unit differs with frequency and the amplitude same phase of described noise for producing
The suppression ripple of 180 degree carries out noise reduction to noise.
Preferably, A post, B post, C post, ceiling and the direction that described mike is arranged in automobile bodies
On dish；Described car audio system includes multiple speaker, Qianmen that described speaker is arranged in compartment,
On back door, console, ceiling and front-row seats back.
Present embodiment detects the position of personnel in compartment by the pressure transducer being arranged in seat, logical
Cross the source of sound in mike detection compartment, and by car audio system, occupant position is led
Dynamic noise reduction, in noise-reduction method of the present invention, the noise reduction of sound equipment is arranged can be according to the number of occupant with sat
Position adjusts flexibly, can obviously reduce the noise of occupant position, improves taking of automobile
Quality.
Further, in the present embodiment, described control unit is additionally operable to obtain automobile current driving speed,
Inquiring about the synopsis that this automobile speed is made an uproar with wind, the wind obtained in the compartment corresponding to automobile current vehicle speed is made an uproar,
And control each speaker of car audio system and produce the frequency and amplitude is identical but phase of making an uproar with described wind
The suppression ripple of 180 degree carries out actively wind and makes an uproar suppression.
In this embodiment, (the described preliminary device that actively drops is i.e. for enter according to speed to use preliminary active noise reduction
Sector-style is made an uproar suppression) (the described accurate noise reduction i.e. noise of testing staff position also drops with accurate noise reduction
Make an uproar) combine, thus the effect of active noise reduction in further increasing car.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention, every profit
The equivalent structure made by description of the invention and accompanying drawing content or equivalence flow process conversion, or directly or indirectly transport
It is used in other relevant technical fields, is the most in like manner included in the scope of patent protection of the present invention.
Claims (8)
1. an automobile active denoising method, it is characterised in that including:
The position sat by personnel in the pressure transducer that is arranged in automotive seat detection compartment；
By the source of sound being arranged in the mike of diverse location gathers compartment in compartment；
Estimate the central area that personnel institute seat in compartment is put；
The noise of occupant position is isolated according to the source of sound collected；
The position, the acoustic centre of source, field that in calculating compartment, the noise of everyone position is formed；And
Analyze the spectrogram of described noise；
Opening car audio system, sound field center to the described noise adjusting car audio system is formed
Position, the acoustic centre of source, field；
Produce and differ the suppression ripple of 180 degree with the frequency of described noise and amplitude same phase noise is dropped
Make an uproar.
Automobile active denoising method the most according to claim 1, it is characterised in that described mike sets
On A post, B post, C post, ceiling and the steering wheel being placed in automobile bodies.
Automobile active denoising method the most according to claim 1, it is characterised in that described automobile audio
System includes multiple speaker, Qianmen that described speaker is arranged in compartment, back door, console, ceiling
With on front-row seats back.
Automobile active denoising method the most according to claim 3, it is characterised in that producing suppression ripple
After noise is carried out noise reduction, also include:
Obtain automobile current driving speed；
Inquire about the synopsis that this automobile speed is made an uproar with wind, obtain the wind in the compartment corresponding to automobile current vehicle speed
Make an uproar；
Control each speaker of car audio system and produce the frequency and amplitude is identical but phase of making an uproar with described wind
The suppression ripple of 180 degree carries out actively wind and makes an uproar suppression.
5. an automobile active noise reduction system, it is characterised in that including:
It is arranged at the mike of diverse location in compartment, for gathering the source of sound in compartment；
The pressure transducer being arranged in automotive seat, the position that personnel are sat in detecting compartment；
Control unit, is connected to described mike and pressure transducer, and in being used for estimating compartment, personnel are sat
The central area of position, and control car audio system the central area of occupant position is carried out
Active noise reduction；
Described control unit includes that source of sound analyzes module and computing module；
Described source of sound analyzes module for isolating making an uproar of occupant position according to the source of sound collected
Sound and the spectrogram of calculating noise；
The described computing module position, the acoustic centre of source, field that the noise of everyone position is formed in calculating compartment
Put；
Described car audio system includes sound field center adjustment unit and noise suppressed sound generation unit；
Described sound field center adjustment unit is used for opening car audio system, adjusts car audio system
The position, the acoustic centre of source, field that sound field center to described noise is formed；
Described noise suppressed sound generation unit differs with frequency and the amplitude same phase of described noise for producing
The suppression ripple of 180 degree carries out noise reduction to noise.
Automobile active noise reduction system the most according to claim 5, it is characterised in that described mike sets
On A post, B post, C post, ceiling and the steering wheel being placed in automobile bodies.
Automobile active noise reduction system the most according to claim 5, it is characterised in that described automobile audio
System includes multiple speaker, Qianmen that described speaker is arranged in compartment, back door, console, ceiling
With on front-row seats back.
Automobile active noise reduction system the most according to claim 7, it is characterised in that described control unit
It is additionally operable to obtain automobile current driving speed, inquires about the synopsis that this automobile speed is made an uproar with wind, obtain automobile and work as
The wind in compartment corresponding to front speed is made an uproar, and controls the generation of car audio system each speaker and described wind
Frequency of making an uproar is identical with amplitude but suppression ripple of phase 180 degree carries out actively wind makes an uproar suppression.
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| CN201510845558.4A CN105513585B (en) | 2015-11-27 | 2015-11-27 | A kind of automobile active denoising method and system |
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| CN201510845558.4A CN105513585B (en) | 2015-11-27 | 2015-11-27 | A kind of automobile active denoising method and system |
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| CN105513585B true CN105513585B (en) | 2016-10-19 |
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| CN106098052A (en) * | 2016-06-01 | 2016-11-09 | 东华大学 | A kind of textile machine is against sound noise-reduction method |
| CN106604180A (en) * | 2016-10-28 | 2017-04-26 | 惠州市德赛西威汽车电子股份有限公司 | Self-adapting sound field adjusting method |
| CN106891760B (en) * | 2017-02-10 | 2019-07-26 | 上海蔚来汽车有限公司 | Electric charging equipment and its active denoising method |
| EP3401902B1 (en) * | 2017-05-10 | 2019-07-03 | FCA Italy S.p.A. | Improvement of the acoustic comfort in the passenger compartment of a motor vehicle |
| CN109426177B (en) * | 2017-08-24 | 2021-08-27 | 中车株洲电力机车研究所有限公司 | Active noise reduction method and device for train |
| CN110021288B (en) * | 2018-01-10 | 2021-07-30 | 郑州宇通客车股份有限公司 | Active noise reduction control method and system for vehicle |
| WO2019201028A1 (en) * | 2018-04-21 | 2019-10-24 | 中车青岛四方机车车辆股份有限公司 | Active noise control system in high speed train |
| CN110689873B (en) * | 2018-07-06 | 2022-07-12 | 广州小鹏汽车科技有限公司 | Active noise reduction method, device, equipment and medium |
| CN109119060B (en) * | 2018-08-09 | 2021-04-13 | 广州小鹏汽车科技有限公司 | Active noise reduction method and system applied to automobile |
| CN110111764B (en) * | 2019-05-13 | 2021-12-07 | 广州小鹏汽车科技有限公司 | Vehicle and noise reduction method and noise reduction device thereof |
| CN111128113A (en) * | 2019-12-31 | 2020-05-08 | 上海工程技术大学 | Active noise reduction method and system for passenger plane cabin of civil aviation |
| CN115072530A (en) * | 2022-07-25 | 2022-09-20 | 华升富士达电梯有限公司 | Noise reduction method and system for elevator car |
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Address after: 351100 west side of LiHan Road, Jiangxi town, Jiangkou Town, Hanjiang District, Putian, Fujian, China Patentee after: Yundu New Energy Vehicle Co.,Ltd. Address before: 351100 west side of LiHan Road, Jiangxi town, Jiangkou Town, Hanjiang District, Putian, Fujian, China Patentee before: Yundu New Energy Automobile Co.,Ltd. Address after: 351100 west side of LiHan Road, Jiangxi town, Jiangkou Town, Hanjiang District, Putian, Fujian, China Patentee after: Yundu New Energy Automobile Co.,Ltd. Address before: 351100 west side of LiHan Road, Jiangxi town, Jiangkou Town, Hanjiang District, Putian, Fujian, China Patentee before: FJ MOTOR GROUP, YUDO NEW-ENERGY AUTOMOBILE Co.,Ltd. |
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