CN103557043A - Engine noise reduction controller - Google Patents
Engine noise reduction controller Download PDFInfo
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- CN103557043A CN103557043A CN201310557119.4A CN201310557119A CN103557043A CN 103557043 A CN103557043 A CN 103557043A CN 201310557119 A CN201310557119 A CN 201310557119A CN 103557043 A CN103557043 A CN 103557043A
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Abstract
The invention relates to an engine noise reduction controller and belongs to the technical field of automobile electronics. The engine noise reduction controller comprises a data acquisition module for inputting an engine noise signal, an audio decoding module connected with the data acquisition module, a DSP (digital signal processor) data processing module connected with the audio decoding module, a power amplification module which is connected with the audio decoding module and can be used for outputting a reverse phase modulation output signal to counteract engine noise and an engine rotating speed regulation module which is connected with the DSP data processing module and can be used for receiving an engine rotating speed signal. According to the engine noise reduction controller, a DSP is used for acquiring noise signals and analyzing the signals to output reverse sound waves equal to external noise and neutralize the noise, so that a noise reduction effect is achieved; by the mode, the mass of a whole automobile can be reduced; furthermore, the low-frequency noise with higher injury to a human body can be alleviated, and the noise reduction effect is good; therefore, an overall low-noise automobile can be implemented.
Description
Technical field
The invention belongs to technical field of automotive electronics, be 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 that sound-absorbing is processed, sound insulation is processed, 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.
Summary of the invention
Object of the present invention is exactly for the problems referred to above, and a kind of motor noise reduction controller is provided.
The technical solution used in the present invention is: it comprises for 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, anti-phase amplitude modulation output signal can being exported of being connected with audio decoder module being offset to the engine speed conditioning module of power amplifier module with the received engine rotational speed signal being connected with DSP data processing module of engine noise.
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.
Profit of the present invention 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 structural representation of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, be convenient to be well understood to the present invention, but they do not form restriction to the present invention.
As shown in Figure 1, the present invention 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 is inputted by the signal MIC microphone MIC of left and right acoustic channels, is placed in engine compartment, while selecting MIC microphone, requires it can detect the environment medium and low frequency noise (100～1000Hz) that ear can be heard.
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 D class power amplifier as the core of 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 invention: engine noise signal is inputted by the signal MIC microphone MIC of 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 as the reference signal of 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, each sample value to input reference signal, by specific algorithm, upgrade, adjust Weighting factor, the mean square error that the output of filter is compared with target signal is minimum, 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 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, anti-phase amplitude modulation output signal can being exported of being connected with audio decoder module being offset to the engine speed conditioning module of power amplifier module with the received engine rotational speed signal being connected with DSP data processing module of engine noise.
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: the MIC microphone that described data acquisition module is 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.
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| CN201310557119.4A CN103557043A (en) | 2013-11-11 | 2013-11-11 | Engine noise reduction controller |
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| CN201310557119.4A CN103557043A (en) | 2013-11-11 | 2013-11-11 | Engine noise reduction controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104886981A (en) * | 2015-04-29 | 2015-09-09 | 成都陌云科技有限公司 | Active noise reduction bed |
| CN104942810A (en) * | 2015-04-29 | 2015-09-30 | 成都陌云科技有限公司 | Intelligent robot capable of denoising |
| WO2016029469A1 (en) * | 2014-08-29 | 2016-03-03 | SZ DJI Technology Co., Ltd. | An unmanned aerial vehicle (uav) for collecting audio data |
| CN106089361A (en) * | 2016-06-30 | 2016-11-09 | 重庆长安汽车股份有限公司 | A kind of car intrinsic motivation active noise reduction system and method |
| CN106128449A (en) * | 2016-08-16 | 2016-11-16 | 青岛歌尔声学科技有限公司 | A kind of automobile active denoising method |
| CN106210974A (en) * | 2014-09-19 | 2016-12-07 | 现代摩比斯株式会社 | The active noise control device of vehicle |
| CN106382143A (en) * | 2016-12-01 | 2017-02-08 | 吉林大学 | Active noise reduction device and active noise reduction method based on engine speed |
| CN107045778A (en) * | 2017-04-26 | 2017-08-15 | 兰州交通大学 | A kind of Multifunctional noise bucking-out system |
| CN110015253A (en) * | 2018-01-10 | 2019-07-16 | 郑州宇通客车股份有限公司 | A kind of vehicle active noise reduction control method and its system |
| CN112465350A (en) * | 2020-11-26 | 2021-03-09 | 周卜琼 | Method for optimizing automobile noise by using modal participation factors |
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Cited By (18)
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| US9889931B2 (en) | 2014-08-29 | 2018-02-13 | Sz Dji Technology, Co., Ltd | Unmanned aerial vehicle (UAV) for collecting audio data |
| WO2016029469A1 (en) * | 2014-08-29 | 2016-03-03 | SZ DJI Technology Co., Ltd. | An unmanned aerial vehicle (uav) for collecting audio data |
| CN105899965A (en) * | 2014-08-29 | 2016-08-24 | 深圳市大疆创新科技有限公司 | Unmanned aerial vehicle (UAV) for collecting audio data |
| US10850839B2 (en) | 2014-08-29 | 2020-12-01 | SZ DJI Technology Co., Ltd. | Unmanned aerial vehicle (UAV) for collecting audio data |
| JP2017502568A (en) * | 2014-08-29 | 2017-01-19 | エスゼット ディージェイアイ テクノロジー カンパニー リミテッドＳｚ Ｄｊｉ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ | Unmanned aerial vehicle and voice data collection method using unmanned aerial vehicle |
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| CN106210974B (en) * | 2014-09-19 | 2019-09-10 | 现代摩比斯株式会社 | The active noise control device of vehicle |
| CN106210974A (en) * | 2014-09-19 | 2016-12-07 | 现代摩比斯株式会社 | The active noise control device of vehicle |
| CN104942810A (en) * | 2015-04-29 | 2015-09-30 | 成都陌云科技有限公司 | Intelligent robot capable of denoising |
| CN104886981A (en) * | 2015-04-29 | 2015-09-09 | 成都陌云科技有限公司 | Active noise reduction bed |
| CN106089361B (en) * | 2016-06-30 | 2018-11-20 | 重庆长安汽车股份有限公司 | A kind of car engine active noise reduction system and method |
| CN106089361A (en) * | 2016-06-30 | 2016-11-09 | 重庆长安汽车股份有限公司 | A kind of car intrinsic motivation active noise reduction system and method |
| CN106128449A (en) * | 2016-08-16 | 2016-11-16 | 青岛歌尔声学科技有限公司 | A kind of automobile active denoising method |
| CN106128449B (en) * | 2016-08-16 | 2023-09-01 | 青岛歌尔声学科技有限公司 | Active noise reduction method for automobile |
| CN106382143A (en) * | 2016-12-01 | 2017-02-08 | 吉林大学 | Active noise reduction device and active noise reduction method based on engine speed |
| CN107045778A (en) * | 2017-04-26 | 2017-08-15 | 兰州交通大学 | A kind of Multifunctional noise bucking-out system |
| CN110015253A (en) * | 2018-01-10 | 2019-07-16 | 郑州宇通客车股份有限公司 | A kind of vehicle active noise reduction control method and its system |
| CN112465350A (en) * | 2020-11-26 | 2021-03-09 | 周卜琼 | Method for optimizing automobile noise by using modal participation factors |
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Application publication date: 20140205 |