CN203547837U - Engine noise reduction controller - Google Patents
Engine noise reduction controller Download PDFInfo
- Publication number
- CN203547837U CN203547837U CN201320711398.0U CN201320711398U CN203547837U CN 203547837 U CN203547837 U CN 203547837U CN 201320711398 U CN201320711398 U CN 201320711398U CN 203547837 U CN203547837 U CN 203547837U
- Authority
- CN
- China
- Prior art keywords
- module
- noise reduction
- noise
- audio decoder
- data processing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000003750 conditioning effect Effects 0.000 claims description 15
- 230000000694 effects Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Images
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
An engine noise reduction controller comprises a DSP data processing module, a power amplifying module and an engine speed regulating module. The power amplifying module is connected with an audio decoding module and can output inverse amplitude modulation output signals to offset noise of an engine, and the engine speed regulating module is connected with the DSP data processing module and can receive engine speed signals. Noise signals are collected and analyzed through a DSP, inverse sound waves equal to the noise outside are output to neutralize the noise so that the effect of noise reduction can be achieved, mass of a whole vehicle can be reduced through the mode, low-frequency noise with large harm to the human body is weakened, the effect of noise reduction is better, and therefore noise of the whole vehicle is lowered.
Description
Technical field
The utility model belongs to technical field of automotive electronics, is specifically related to a kind of motor noise reduction controller.
Background technique
Motor is the vibrating source of whole noise system, and motor noise reduction technology can roughly be divided into active noise reduction and passive noise reduction.Active noise reduction is directly to reduce engine noise, and passive noise reduction needs to improve as far as possible resonant frequency and the sqouynd absorption lowering noise of system.Traditional engine noise control technique is mainly passive noise reduction technology, comprise sound-absorbing processing, sound insulation processing, use silencing apparatus, damping vibration attenuation etc., this mode can cause that automobile volume is large and noise reduction is not ideal enough, lacks the processing to motor active noise reduction.
Model utility content
The purpose of this utility model is exactly for the problems referred to above, and a kind of motor noise reduction controller is provided.
The technical solution adopted in the utility model is: it comprises for by the engine speed conditioning module of the data acquisition module of engine noise signal input, the audio decoder module being connected with data acquisition module, the DSP data processing module being connected with audio decoder module, the received engine rotational speed signal that anti-phase amplitude modulation output signal can be exported to offset the power amplifier module of engine noise and be connected with DSP data processing module that is connected with audio decoder module.
Further, described audio decoder module is audio codec CODEC.
Further, described DSP data processing module is connected with the engine speed conditioning module that can receive engine rotational speed signal.
Further, described engine speed conditioning module comprises magnetoelectric tachometric transducer and conditioning circuit.
Further, described DSP data processing module is connected with FLASH ROM expansion module and the SDRAM expansion module that can expand DSP data processing module sheet inner capacities.
Further, described data acquisition module is the MIC microphone of the left and right acoustic channels that is connected with audio decoder module.
Further, described power amplifier module comprises the D class power amplifier being connected with audio decoder module and the loudspeaker that are connected with D class power amplifier.
The utility model profit gathers noise signal by DSP, and signal is analyzed, the reverse sound wave that output equates with ambient noise, noise is neutralized, thereby realize the effect of noise reduction, this mode can reduce complete vehicle quality, slacken the larger low-frequency noise of human body infringement simultaneously, noise reduction is better, thereby realizes the low noise of car load.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, is convenient to be well understood to the utility model, but they do not form and limit the utility model.
As shown in Figure 1, the utility model is arranged in engine intake manifold, comprise data acquisition module 1, audio decoder module 2, DSP data processing module 3 and power amplifier module 4, data acquisition module 1 is connected with audio decoder module 2, DSP data processing module 3 is connected with audio decoder module 2, and power amplifier module 4 is connected with audio decoder module 2.Data acquisition module 1 is the MIC microphone of the left and right acoustic channels that is connected with audio decoder module.Audio decoder module 2 is audio codec CODEC.DSP data processing module 3 is connected with engine speed conditioning module 5, and engine speed conditioning module 5 comprises magnetoelectric tachometric transducer and conditioning circuit; DSP data processing module 3 is connected with FLASH ROM expansion module 6 and the SDRAM expansion module 7 that can expand 3 inner capacities of DSP data processing module.Power amplifier module 4 comprises the D class power amplifier 4.1 being connected with audio decoder module and the loudspeaker 4.2 that are connected with D class power amplifier 4.1.
Data acquisition module: engine noise, by the signal MIC microphone MIC input of left and right acoustic channels, is placed in engine compartment, requires it can detect the environment medium and low frequency noise (100～1000Hz) that ear can be heard while selecting MIC microphone.
DSP data processing module: noise and the sample frequency that can gather below 1.5KHZ frequency are more than or equal to 16KHZ.This module function is image data, and control algorithm is carried out to integrated processing, realizes real-time operation so that noise is controlled.Because the sheet inner capacities that DSP carries is not enough, this module also comprises FLASH ROM expansion module and SDRAM expansion module.
Audio coding decoding module: this module can be selected low power consumption, stereo audio codec CODEC.After the noise signal of the difference left and right acoustic channels of being inputted by MIC microphone is processed by audio decoder, after processing by DSP data processing module, again signal is input to power amplifier module and is further processed.
Power amplifier module: use the core of D class power amplifier as power amplifier module in this controller, the signal of audio coding decoding module output can be carried out to power amplification, finally obtain identical with noise single spin-echo, amplitude stereoly, recycling loudspeaker go out to offset original noise by this audio emission.
Engine speed conditioning module: engine speed conditioning module is comprised of magnetoelectric tachometric transducer and conditioning circuit, conditioning circuit carried out zero balancing to the sinusoidal wave tach signal of magnetoelectric tachometric transducer output, after conditioning circuit is processed, obtain square signal, DSP data processing module directly gathers this digital signal.
Working principle of the present utility model: the signal MIC microphone MIC input of engine noise signal by left and right acoustic channels, this signal inputs to DSP data processing module as the target signal that will eliminate after by audio decoder resume module, meanwhile DSP data processing module is received after engine rotational speed signal, calculate half order frequency noise under this rotating speed reference signal as active sound eliminating system, by MIC microphone, gather signal to DSP data processing module as the target signal that will eliminate, design an adaptive filtering device, to each sample value of input reference signal, by specific algorithm, upgrade, adjust Weighting factor, the mean square error minimum that the output of filter is compared with target signal, the output of the filter obtaining thus drives loudspeaker output through audio decoder module and D class power amplifier again as final reverse amplitude-modulated signal, thereby counteracting engine noise.
The content that this specification is not described in detail belongs to the known prior art of professional and technical personnel in the field.
Claims (6)
1. a motor noise reduction controller, is characterized in that: it comprises for by the engine speed conditioning module of the data acquisition module of engine noise signal input, the audio decoder module being connected with data acquisition module, the DSP data processing module being connected with audio decoder module, the received engine rotational speed signal that anti-phase amplitude modulation output signal can be exported to offset the power amplifier module of engine noise and be connected with DSP data processing module that is connected with audio decoder module.
2. a kind of motor noise reduction controller according to claim 1, is characterized in that: described audio decoder module is audio codec CODEC.
3. a kind of motor noise reduction controller according to claim 1, is characterized in that: described engine speed conditioning module comprises magnetoelectric tachometric transducer and conditioning circuit.
4. a kind of motor noise reduction controller according to claim 1, is characterized in that: described DSP data processing module is connected with FLASHROM expansion module and the SDRAM expansion module that can expand DSP data processing module sheet inner capacities.
5. a kind of motor noise reduction controller according to claim 1, is characterized in that: described data acquisition module is the MIC microphone of the left and right acoustic channels that is connected with audio decoder module.
6. a kind of motor noise reduction controller according to claim 1, is characterized in that: described power amplifier module comprises the D class power amplifier being connected with audio decoder module and the loudspeaker that are connected with D class power amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320711398.0U CN203547837U (en) | 2013-11-11 | 2013-11-11 | Engine noise reduction controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320711398.0U CN203547837U (en) | 2013-11-11 | 2013-11-11 | Engine noise reduction controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203547837U true CN203547837U (en) | 2014-04-16 |
Family
ID=50465966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320711398.0U Expired - Fee Related CN203547837U (en) | 2013-11-11 | 2013-11-11 | Engine noise reduction controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203547837U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557043A (en) * | 2013-11-11 | 2014-02-05 | 东风汽车公司 | Engine noise reduction controller |
| CN111306614A (en) * | 2020-03-03 | 2020-06-19 | 青岛海尔空调器有限总公司 | Active noise reduction air conditioner and control method thereof |
-
2013
- 2013-11-11 CN CN201320711398.0U patent/CN203547837U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103557043A (en) * | 2013-11-11 | 2014-02-05 | 东风汽车公司 | Engine noise reduction controller |
| CN111306614A (en) * | 2020-03-03 | 2020-06-19 | 青岛海尔空调器有限总公司 | Active noise reduction air conditioner and control method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103557043A (en) | Engine noise reduction controller | |
| CN203150113U (en) | Active noise reduction apparatus for automobile | |
| WO2008002873B1 (en) | Active noise reduction engine speed determining | |
| CN201317323Y (en) | Multi-channel active noise control device for commercial vehicle cab | |
| US9478214B2 (en) | Device and method for generating noise for a motor vehicle | |
| EP2239728A3 (en) | System for active noise control based on audio system output | |
| ATE402468T1 (en) | SOUND TUNING DEVICE, USE THEREOF AND SOUND TUNING METHOD | |
| CN109747575B (en) | Multi-mode in-vehicle sound quality optimization system based on order optimization | |
| CN105840462A (en) | Active noise-eliminating and noise-reducing system of compressor | |
| CN204006502U (en) | Control device for noise reduction of air conditioner | |
| JP2016521375A (en) | Adaptive feedforward noise reduction for motor vehicles | |
| CN107424596A (en) | Noise initiative control method and system in a kind of car hold | |
| CN203547837U (en) | Engine noise reduction controller | |
| CN208045095U (en) | Automotive seat denoising device based on active noise reduction techniques | |
| CN110972007A (en) | Active earphone noise reduction method suitable for ship high-noise scene | |
| CN111933105A (en) | Automobile noise control device and control method thereof | |
| CN203902837U (en) | Helicopter paddle antiphase muffler device | |
| CN114464157A (en) | Active noise reduction method and device for vehicle and storage medium | |
| CN1694161A (en) | Control system for active noise of hydraulic pump | |
| CN204113385U (en) | The active active sound eliminating system of a kind of engine exhaust | |
| JP2017166471A (en) | Exhaust system having noise elimination and frequency adjusting function of noise | |
| CN212434253U (en) | Automobile noise control device | |
| CN201311777Y (en) | Active destructive power source vibration noise device | |
| CN203747975U (en) | Active noise elimination system capable of controlling volume | |
| CN208589260U (en) | A kind of smart home denoising device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 |