CN208689932U - A kind of car audio clunk management system - Google Patents
A kind of car audio clunk management system Download PDFInfo
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- CN208689932U CN208689932U CN201820942712.9U CN201820942712U CN208689932U CN 208689932 U CN208689932 U CN 208689932U CN 201820942712 U CN201820942712 U CN 201820942712U CN 208689932 U CN208689932 U CN 208689932U
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Abstract
The utility model relates to a kind of automobile audio systems, including host and vehicle-mounted ANC and entertainment systems, vehicle-mounted ANC system includes three parts: sensor module, ANC master control plate module, loudspeaker, host DSP module is replaced to carry out noise reduction process by the DSP module in isolated node, and then improve active noise and eliminate operation efficiency, reduce influence of the ANC to the operation fluency of host multimedia service aspect；The acquisition and pretreatment that using acceierometer sensor the states such as road conditions are carried out with feed forward type realize that comprehensive active noise is eliminated；Entire noise reduction system is placed near loudspeaker, guarantees the noise level of environment near loudspeaker.
Description
Technical field
The utility model relates to a kind of car audio clunk management systems, belong to car audio detection technique field.
Background technique
Improve car steering experience not being focusing only in the manipulation and operation of vehicle, further includes improving interior environment
Comfort level.Clunk management system is installed on vehicle, executes various audio digital signals processing techniques, with enhancing, inhibit and/or
Eliminate the indoor noise in vehicle interior cabin.Automobile noise management system may include one or more for being mounted on each position of vehicle
A sensor (for example, microphone, accelerometer etc.), with monitoring and detection noise source, such as engine noise, wind noise, vehicle
Vibration, road rumble, tyre cavity noise or other noises based on vibration as caused by mobile vehicle part.
Existing car audio clunk management system has the disadvantage in that
1) in existing onboard audio clunk management system, generally using microphone in cabin and loudspeaker dispersed placement, ring
Border factor influences big, layout complexity, and noise reduction system debugging is complicated.
2) existing vehicle-mounted active noise eliminates (ANC) system, generally using the wheat being dispersed in automobile passenger compartment everywhere
After gram wind picks up noise, transmits signals in host digital signal processing module and handled, then be transmitted to power amplifier and loudspeaker
Reverse phase sound wave is issued to reach noise reduction.This mode can have higher want to the operational capability of host digital signal processing module
It asks, reduces operation fluency of the host digital signal processing module in terms of other multimedia services, and distributed signal comes
Past, overall wire sheaves arrangement is extremely complex.
3) existing vehicle-mounted active noise cancellation systems, only detection drives interior noise, is disappeared using reaction type active noise
Except technology, without to Main Noise Sources --- engine noise, road noise and chassis vibration carry out the acquisition of feed forward type and locate in advance
Reason, noise reduction effect are poor.
Summary of the invention
The technical problems to be solved in the utility model is against the above deficiency, to provide a kind of car audio clunk management system
System replaces host DSP module to carry out noise reduction process, and then improves active noise and eliminate fortune by the DSP module in isolated node
Efficiency is calculated, influence of the ANC to the operation fluency of host multimedia service aspect is reduced；Using acceierometer sensor to road conditions
Etc. states carry out the acquisition and pretreatment of feed forward type, realize that comprehensive active noise is eliminated；Entire noise reduction system is placed in loudspeaker
Near, guarantee the noise level of environment near loudspeaker.
In order to solve the above technical problems, the technical solution adopted in the utility model is as follows: a kind of automobile audio system, packet
Host and vehicle-mounted ANC and entertainment systems are included, vehicle-mounted ANC system includes three parts: sensor module, is raised at ANC master control plate module
Sound device.
As a further improvement of the above technical scheme:
The ANC master control plate module includes analog-digital converter, voice communication interface, can be used for noisy digit signal processing
DSP module, power amplifier.
The sensor module include for acquire road surface by automobile tire conduction come noise signal needed for acceleration
Spend sensor and the microphone for sound signal collecting in the passenger compartment of feedback.
The analog-digital converter is individually present or is integrated in inside acceleration transducer, microphone or DSP module.
The DSP module is electrically connected with analog-digital converter, power amplifier, voice communication interface respectively.
The analog-digital converter includes the first analog-digital converter and the second analog-digital converter, the first analog-digital converter and acceleration
Sensor electrical connection is spent, the second analog-digital converter is electrically connected with microphone.
The power amplifier is electrically connected with loudspeaker.
The DSP module is used for by the collected voice signal digitized of acceleration transducer and microphone, with master
Machine is compared by the wanted sound signal that voice communication interface transmits, to distinguish useful signal and noise signal, then
Noise signal is subjected to reverse phase processing, to carry out noise reduction process.
The noise reduction process process are as follows: by the phase of the collected noise signal of microphone it is reversed after, with identical amplitude
It is played back by loudspeaker, it can achieve the purpose that noise reduction.
The power amplifier is used to carry out the noise signal of DSP module treated useful signal and reverse process
Power amplification plays sound for drive the speaker.
The utility model takes above technical scheme, has the advantage that
1) microphone in cabin and loudspeaker being integrated into a mould group, layout is simple, is easy debugging, and harness is at low cost, and one
Standing posture solves vehicle ANC application demand, is not easy affected by environment.
2) by replacing host digital signal processing module to carry out noise reduction process from node DSP, and then active noise is improved
Operation efficiency is eliminated, the operation fluency in terms of multimedia service is improved.
3) noise reduction mode is eliminated using feed forward type active noise to feedover to the vibration of engine noise, road noise and chassis
The acquisition and pretreatment of formula can achieve the 20dB noise reduction capability not less than the prior art, realize that comprehensive active noise is eliminated.
The utility model is described in further detail with reference to the accompanying drawings and examples.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of car audio clunk management system in the utility model embodiment.
In figure, 1- host；The second analog-digital converter of 2-；3- voice communication interface；4- master control plate module；5- acceleration sensing
Device；The first analog-digital converter of 6-；7-DSP module；8- microphone；9- power amplifier；10- loudspeaker.
Specific embodiment
Embodiment, as shown in Fig. 1, a kind of car audio clunk management system are vehicle-mounted including host 1 and centralized arrangement
ANC system, wherein host 1 controls each audio, functional node interworking, as control and arithmetic core to complete vehicle
Information-based, intelligentized needs.
Vehicle-mounted ANC system participates in each node of vehicle as a node in entire car audio clunk management system
Between interaction, by collected detection information by AD conversion, DSP processing, then by loudspeaker play, completion ANC make an uproar
Sound is removed.
Vehicle-mounted ANC system includes three parts: sensor module, ANC master control plate module 4, loudspeaker 10.ANC master control borad
Module 4 includes analog-digital converter, voice communication interface 3, the DSP module 7 that can be used for noisy digit signal processing, power amplifier
9。
1) sensor module include for acquire road surface by automobile tire conduction come noise signal needed for acceleration
Sensor 5 and microphone 8 for sound signal collecting in the passenger compartment of feedback.Noise outside passenger compartment includes that engine is made an uproar
Sound, road noise and chassis vibration noise.
2) master control borad:
DSP module 7 is electrically connected with analog-digital converter, power amplifier 9, voice communication interface 3 respectively, analog-digital converter packet
The first analog-digital converter 6 and the second analog-digital converter 2 are included, the first analog-digital converter 6 is electrically connected with acceleration transducer 5, and second
Analog-digital converter 2 is electrically connected with microphone 8；Power amplifier 9 is electrically connected with loudspeaker 10.
A) voice communication interface 3 is for the data interaction with host 1 and remaining each functional node, mainly from bus
It obtains control signal and host to be passed to the audio signal of vehicle-mounted power amplifier and loudspeaker.
The voice communication interface, including but not limited to following two ways: the daisy topology concatenated between each node,
Whole-vehicle wiring is simple；Or each node passes through alone the Star topology that tone frequency channel wire is connected to host, whole-vehicle wiring is more complex；Other cloth
Line mode.
B) analog-digital converter is used for by acceleration transducer 5 or the collected analog signal digital of microphone 8, to be used for
Digital Signal Processing.Analog-digital converter can be individually present, and also can integrate in acceleration transducer 5, microphone 8 or DSP mould
Inside block 7.
C) DSP module 7 is used for by acceleration transducer 5 and the collected voice signal digitized of microphone 8, with master
Machine is compared by the wanted sound signal that voice communication interface transmits, to distinguish useful signal and noise signal, then
Noise signal is subjected to reverse phase processing, so as to the noise reduction process of next step, the noise reduction process process are as follows: acquire microphone 8
After the phase of the noise signal arrived is reversed, played back with identical amplitude by loudspeaker 10, original sound wave is broadcast with loudspeaker 10
The sound wave interference put.Because the amplitude of two interference sound waves is identical, opposite in phase, therefore can achieve the purpose of noise reduction.
D) power amplifier 9 is used to carry out the noise signal of treated the useful signal of DSP module 7 and reverse process
Power amplification plays sound for drive the speaker 10.
3) loudspeaker 10 completes ANC noise reduction for playing sound.
Claims (6)
1. a kind of car audio clunk management system, it is characterised in that: vehicle-mounted including host (1) and vehicle-mounted ANC and entertainment systems
ANC system includes three parts: sensor module, ANC master control plate module (4), loudspeaker (10)；
The ANC master control plate module (4) includes analog-digital converter, voice communication interface (3), can be used for noisy digit signal processing
DSP module (7), power amplifier (9)；
The sensor module include for acquire road surface by automobile tire conduction come noise signal needed for acceleration pass
Sensor (5) and microphone (8) for sound signal collecting in the passenger compartment of feedback.
2. a kind of car audio clunk management system as described in claim 1, it is characterised in that: the analog-digital converter is independent
In the presence of or to be integrated in acceleration transducer (5), microphone (8) or DSP module (7) internal.
3. a kind of car audio clunk management system as described in claim 1, it is characterised in that: the DSP module (7) is respectively
It is electrically connected with analog-digital converter, power amplifier (9), voice communication interface (3).
4. a kind of car audio clunk management system as described in claim 1, it is characterised in that: the analog-digital converter includes
First analog-digital converter (6) and the second analog-digital converter (2), the first analog-digital converter (6) are electrically connected with acceleration transducer (5)
It connects, the second analog-digital converter (2) is electrically connected with microphone (8).
5. a kind of car audio clunk management system as described in claim 1, it is characterised in that: the power amplifier (9)
It is electrically connected with loudspeaker (10).
6. a kind of car audio clunk management system as claimed in claim 5, it is characterised in that: the power amplifier (9)
For the noise signal of DSP module (7) treated useful signal and reverse process to be carried out power amplification, raise for driving
Sound device (10) plays sound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820942712.9U CN208689932U (en) | 2018-06-19 | 2018-06-19 | A kind of car audio clunk management system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820942712.9U CN208689932U (en) | 2018-06-19 | 2018-06-19 | A kind of car audio clunk management system |
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| CN208689932U true CN208689932U (en) | 2019-04-02 |
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| CN201820942712.9U Active CN208689932U (en) | 2018-06-19 | 2018-06-19 | A kind of car audio clunk management system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112259115A (en) * | 2020-10-28 | 2021-01-22 | 上海掌欣信息技术有限公司 | Method for reducing environmental noise by using piezoelectric acceleration sensor |
| 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 |
| CN113689842A (en) * | 2021-08-20 | 2021-11-23 | 浙江吉利控股集团有限公司 | Integrated system for active noise reduction and audio power amplification of automobile |
-
2018
- 2018-06-19 CN CN201820942712.9U patent/CN208689932U/en active Active
Cited By (4)
| 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 |
| CN112259115A (en) * | 2020-10-28 | 2021-01-22 | 上海掌欣信息技术有限公司 | Method for reducing environmental noise by using piezoelectric acceleration sensor |
| CN113689842A (en) * | 2021-08-20 | 2021-11-23 | 浙江吉利控股集团有限公司 | Integrated system for active noise reduction and audio power amplification of automobile |
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