CN206625922U - A kind of gas handling system of active noise reduction - Google Patents
A kind of gas handling system of active noise reduction Download PDFInfo
- Publication number
- CN206625922U CN206625922U CN201720086643.1U CN201720086643U CN206625922U CN 206625922 U CN206625922 U CN 206625922U CN 201720086643 U CN201720086643 U CN 201720086643U CN 206625922 U CN206625922 U CN 206625922U
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- Prior art keywords
- loudspeaker
- noise reduction
- gas handling
- handling system
- air inlet
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- Exhaust Silencers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model discloses a kind of gas handling system of active noise reduction, including cold air air inlet pipe, air cleaner and the engine being sequentially connected, in the cold air air inlet pipe microphone is provided with the mouth of pipe, in cold air air inlet pipe loudspeaker is provided with air cleaner, electronic control unit and reverse process circuit are provided between the microphone and loudspeaker, the reverse process circuit is set close to loudspeaker.Compared with prior art, the gas handling system of a kind of active noise reduction of the present utility model, substitute traditional denoising device with the microphone of acquisition noise and the loudspeaker of active sounding, can effectively eliminate the noise of gas handling system.When engine parameter changes, loudspeaker actively changes the noise reduction signal sent, without carrying out large-scale structure change.Not only soundproof effect is good, while can effectively shorten the construction cycle.
Description
Technical field
A kind of air inlet system for vehicle is the utility model is related to, particularly a kind of gas handling system of active noise reduction, belongs to vehicle
Component field.
Background technology
Automobile air inlet system noise is one of Main Noise Sources of automobile, in order to eliminate intake system noise, at present generally
Using resistive or reactive muffling element, i.e., the different parts in gas handling system, increase resonator, quarter-wave long tube,
Various forms of denoising devices such as porous pipes, acoustical cotton, not only take big quantity space, and soundproof effect is poor, when starting
During machine parameter change, the profile and parameter of denoising device need to redesign and match checking, and workload is very big.
Patent document 1（CN104908688A）In disclose a kind of method and device of vehicle active noise reduction, gather respectively
Real-time noise signal data in each noise source and driving cabin simultaneously carry out spectrum analysis, obtain the corresponding frequency spectrum of each noise source
Characteristic information, two spectrum distribution information and spectrum signature information are compared, obtain correlation information, be emitted in and driven by loudspeaker
The voice signal that the target location in cabin offsets with noises from noise sources formation waveform is sailed, to realize the master of vehicle riding space
Dynamic noise reduction.
Patent document 2（CN203547837U）In disclose a kind of engine noise reduction controller, mainly gathered by DSP
Noise signal, and signal is analyzed, the output reverse sound wave equal with extraneous noise level, the noise of engine is neutralized, from
And realize the effect of noise reduction.
Patent document 3（200910039964.6）Active noise reduction system in a kind of Automobile is disclosed, comprising：Microphone,
Signals reverse process circuit, power amplifier module, acoustical generator.The utility model uses ANC active noise reduction principles, by two frequencies and width
Cancelled out each other after being worth identical, phase difference 180 degree sine wave signal superposition, realize that in-car noise eliminates effect using this principle
Fruit.
For system disclosed in patent document 1, patent document 2 and patent document 3, both for the master taken in Automobile
Dynamic noise-reduction method, scope is wider, can not carry out effective active noise reduction individually for gas handling system.And engine aspirating system is made an uproar
Sound is one of Main Noise Sources of automobile, and the noise of gas handling system can even exceed the noise figure of gas extraction system under some operating modes,
Therefore individually to automobile air inlet system progress, targetedly active noise reduction, effect are more notable.
Utility model content
The utility model technical issues that need to address are to be directed to above-mentioned the deficiencies in the prior art, and provide a kind of actively drop
The gas handling system made an uproar.
In order to solve the above technical problems, the technical solution adopted in the utility model is：
A kind of gas handling system of active noise reduction, including cold air air inlet pipe, air cleaner and the engine being sequentially connected, institute
State and be provided with microphone in cold air air inlet pipe at the mouth of pipe, be provided with and raise one's voice at air cleaner in cold air air inlet pipe
Device, is provided with electronic control unit and reverse process circuit between the microphone and loudspeaker, the reverse process circuit leans on
Nearly loudspeaker is set.
As further preferred scheme, the mi-crophone part is arranged in cold air air inlet pipe.
As further preferred scheme, the microphone, electronic control unit, reverse process circuit, loudspeaker exist
Cold air air inlet pipe forms a loop.
Beneficial effect
Compared with prior art, the gas handling system of a kind of active noise reduction of the present utility model, with the microphone of acquisition noise
Substitute traditional denoising device with the loudspeaker of active sounding, can effectively eliminate the noise of gas handling system, loudspeaker and Mike
It is identical with amplitude that two paths of signals that hearsay goes out reaches frequency when at human ear, and phase difference 180 degree, using sound wave interference principle,
Cancelled out each other after two Signal averagings, so as to effectively eliminate the noise of gas handling system.When engine parameter changes, loudspeaker is actively
Change the noise reduction signal sent, without carrying out large-scale structure change.Not only soundproof effect is good, while can effectively shorten exploitation
Cycle.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
The waveform of Fig. 2 the utility model active noise reduction gas handling systems offsets schematic diagram；
The design sketch of Fig. 3 the utility model active noise reduction gas handling systems；
Wherein, 1- cold air air inlet pipe, 2- air cleaners, 3- engines, 4- microphones, 5- loudspeakers, 6- Electronic Controls
Unit, 7- reverse process circuits.
Embodiment
Describe optimal technical scheme of the present utility model in detail below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of gas handling system of active noise reduction of the present utility model, in order to solve traditional air inlet noise reduction system
System it is complicated, soundproof effect is poor, design matching checking workload is big the shortcomings of, actively dropped the utility model proposes a kind of
The gas handling system made an uproar, according to the change of intake system noise, denoising device can be adjusted accordingly actively, to eliminate air inlet in real time
The noise of system, reach optimal noise reduction.
A kind of gas handling system of active noise reduction, including cold air air inlet pipe 1, air cleaner 2 and the engine being sequentially connected
3, microphone 4 is provided with the cold air air inlet pipe 1 at the mouth of pipe, is set in cold air air inlet pipe 1 at air cleaner 2
There is loudspeaker 5, electronic control unit 6 and reverse process circuit 7 are provided between the microphone 4 and loudspeaker 5, it is described reverse
Process circuit 7 is set close to loudspeaker 5.
The part of microphone 4 is arranged in cold air air inlet pipe 1.
The microphone 4, electronic control unit 6, reverse process circuit 7, loudspeaker 5 form one in cold air air inlet pipe 1
Loop.
Fig. 1 show the schematic diagram of the utility model active noise reduction gas handling system, including cold air air inlet 1, air filter
Clear device 2, engine 3, noise signal collection microphone 4, loudspeaker 5, electronic control unit 6, reverse process circuit 7.Noise is believed
Number collection microphone 4 is inserted into inside cold air air inlet 1, for gathering the noise signal at this in real time, the noise collected
Signal controls reverse process circuit 7 by Real-time Feedback to control electronic control unit 6, electronic control unit 6, and raw noise is believed
Number handled, and spread out of through the loudspeaker 5 at air inlet, loudspeaker 5 is arranged near noise signal collection microphone 4,
Ask ensure from loudspeaker 5 and at microphone 4 spread out of two paths of signals reach human ear at when frequency it is identical with amplitude, and phase differ
180 degree.Using sound wave interference principle, cancelled out each other after two Signal averagings, so as to effectively eliminate the noise of gas handling system.
The waveform that Fig. 2 show the utility model active noise reduction gas handling system offsets schematic diagram, the original substantially of active noise reduction
Reason is with collecting frequency and width when the original noise of gas handling system is reached at human ear by noise elimination signal caused by active
It is worth identical, opposite in phase, to reach the purpose for eliminating induction noise.Figure center line 1 is believed to reach inlet noise when at human ear
Number, for line 2 to reach noise elimination signal caused by active when at human ear, line 3 is the noise signal after superposition, as seen from the figure, two-way
Signal frequency is identical with amplitude, opposite in phase, cancels out each other, and induction noise signal substantially reduces.
The design sketch of Fig. 3 the utility model active noise reduction gas handling systems, line 1 are that the inlet noise before active noise reduction is bent
Line, line 2 are the inlet noise curve after active noise reduction, and overall noise reduction value is in 20dB or so, and effect is clearly.
It is described above, the only preferable embodiment of the application, but the protection domain of the application is not limited thereto,
Any one skilled in the art is in the technical scope that the application discloses, the change or replacement that can readily occur in,
It should all cover within the protection domain of the application.Therefore, the protection domain of the application should be with scope of the claims
It is defined.
Claims (3)
- A kind of 1. gas handling system of active noise reduction, it is characterised in that：Including the cold air air inlet pipe being sequentially connected（1）, air-filtering Device（2）And engine（3）, the cold air air inlet pipe（1）It is upper to be provided with microphone at the mouth of pipe（4）, cold air air inlet pipe（1）On Close to air cleaner（2）Place is provided with loudspeaker（5）, the microphone（4）And loudspeaker（5）Between be provided with Electronic Control Unit（6）With reverse process circuit（7）, the reverse process circuit（7）Close to loudspeaker（5）Set.
- A kind of 2. gas handling system of active noise reduction according to claim 1, it is characterised in that：The microphone（4）Part It is arranged on cold air air inlet pipe（1）It is interior.
- A kind of 3. gas handling system of active noise reduction according to claim 1, it is characterised in that：The microphone（4）, electronics Control unit（6）, reverse process circuit（7）, loudspeaker（5）In cold air air inlet pipe（1）Form a loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720086643.1U CN206625922U (en) | 2017-01-23 | 2017-01-23 | A kind of gas handling system of active noise reduction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720086643.1U CN206625922U (en) | 2017-01-23 | 2017-01-23 | A kind of gas handling system of active noise reduction |
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| Publication Number | Publication Date |
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| CN206625922U true CN206625922U (en) | 2017-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201720086643.1U Active CN206625922U (en) | 2017-01-23 | 2017-01-23 | A kind of gas handling system of active noise reduction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709654A (en) * | 2019-10-25 | 2021-04-27 | 陕西汽车集团有限责任公司 | Air inlet system of commercial vehicle and noise reduction method |
-
2017
- 2017-01-23 CN CN201720086643.1U patent/CN206625922U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709654A (en) * | 2019-10-25 | 2021-04-27 | 陕西汽车集团有限责任公司 | Air inlet system of commercial vehicle and noise reduction method |
| CN112709654B (en) * | 2019-10-25 | 2023-12-05 | 陕西汽车集团股份有限公司 | Air inlet system and noise reduction method of commercial vehicle |
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