CN102982798B - Noise reduction system of generator - Google Patents
Noise reduction system of generator Download PDFInfo
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- CN102982798B CN102982798B CN201210524377.8A CN201210524377A CN102982798B CN 102982798 B CN102982798 B CN 102982798B CN 201210524377 A CN201210524377 A CN 201210524377A CN 102982798 B CN102982798 B CN 102982798B
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Abstract
The invention discloses a noise reduction system of a generator, which comprises a generator, wherein an electric signal acquisition unit is arranged in a circuit of the generator and sequentially connected with a signal conversion device, an electronic control unit and an audio output device through a signal wire harness; when the generator runs, the electric signal acquisition unit acquires electric signals of the generator and transmits the electric signals of the generator to the signal conversion device; the signal conversion device converts the electric signals transmitted by the electric signal acquisition unit into rotating speed signals of the generator and transmits the rotating speed signals of the generator to the electronic control unit; the electronic control unit can output control signals to drive the audio output device to generate sound waves; and the sound waves are opposite in phase and identical in amplitude with the noise corresponding to the rotating speed of the generator in real time. Therefore, the sound waves generated by the generator can be counteracted with the opposite-phase sound waves generated by the audio output device, so as to reduce the noise generated by the running generator and improve the environment in the car for the driver and the passengers.
Description
Technical field
The present invention relates to automobile technical field, be specifically related to the noise reduction system of automobile current generator.
Background technology
The noise of generator comprises electromagnetic noise, aerodynamic noise and mechanical noise three kinds, and generator low speed electromagnetic noise problem brings discomfort as the inherent shortcoming of conventional motor to driver and passenger.Find after deliberation, generator is when rotating speed is lower, and electromagnetic noise accounts for more than 80% of generator overall noise, and therefore, reduction electromagnetic noise just effectively can reduce the overall noise in generator low-speed running situation.
The method of noise reduction is divided into active noise reduction and passive noise reduction two kinds.Active noise reduction is exactly produce the reverse sound wave equal with outside noise by noise reduction system, is neutralized by noise, thus realizes the effect of noise reduction.Passive noise reduction is restriction or noise insulation on noise transmission path.At present, mostly the method reducing generator noise is to adopt passive noise reduction, namely by optimizing the structure of generator amature, stator, or reduce output power and efficiency reduces noise, but finally all cannot contain electromagnetic noise completely, and input and output is not directly proportional.The phase place of generator electromagnetic noise is only relevant with rotating speed with its structure with frequency, when its structure is shaped, the phase place of generator electromagnetic noise is only relevant with its rotating speed with frequency, and the electromagnetic noise therefore adopting the method for active noise reduction to reduce generator possesses feasibility.
Summary of the invention
The object of this invention is to provide a kind of noise reduction system of generator, the noise produced when this system initiatively eliminates generator operation.
For achieving the above object, the technical solution used in the present invention is: a kind of noise reduction system of generator, comprise generator, it is characterized in that: in the circuit of described generator, be provided with electrical signal collection unit, electrical signal collection unit is by signal wire harness connection signal conversion equipment successively, electronic control unit and audio output device, electrical signal collection unit gathers the electric signal of generator, and the electric signal of generator is sent to chromacoder, the electric signal that electrical signal collection unit transmits is converted to the tach signal of generator by chromacoder, and the tach signal of generator is sent to electronic control unit, electronic control unit exports control signal and drives audio output device to send sound wave, the noise phase that described sound wave is corresponding with generator real-time rotate speed is contrary, amplitude is identical.
Owing to adopting above technical scheme, during generator operation, electronic control unit can export control signal and drive audio output device to send sound wave, the noise phase that described sound wave is corresponding with generator real-time rotate speed is contrary, amplitude is identical, the sound wave that such generator produces and the anti-phase sound wave that audio output device sends offset, and then the noise produced when reducing generator operation, improve the environment inside car of human pilot and passenger, avoid the loss adopting and reduce the method such as generated output power and efficiency and cause simultaneously.
Accompanying drawing explanation
Fig. 1 is fundamental diagram of the present invention.
Embodiment
A noise reduction system for generator, comprises generator 10, and generator 10 is provided with electrical signal collection unit 11, and electrical signal collection unit 11 is by signal wire harness connection signal conversion equipment 20, electronic control unit 30 and audio output device 40 successively; The noise figure that described electronic control unit 30 is corresponding under storing each rotating speed of generator; Electrical signal collection unit 11 gathers the electric signal of generator 10, and the electric signal of generator 10 is sent to chromacoder 20, the electric signal that electrical signal collection unit 11 transmits is converted to the tach signal of generator 10 by chromacoder 20, and the tach signal of generator 10 is sent to electronic control unit 30, electronic control unit 30 exports control signal and drives audio output device 40 to send sound wave, and the noise phase that described sound wave is corresponding with generator 10 real-time rotate speed is contrary, amplitude is identical.
When generator 10 operates, the tach signal of imput process system to the generator 10 that chromacoder 20 transmits of electronic control unit 30 carries out rough handling, then the microprocessor through electronic control unit 30 carries out data calculating, output processing system finally by electronic control unit 30 is delivered to audio output device 40 fill order result of calculation, audio output device 40 sends sound wave, the noise phase that described sound wave is corresponding with the real-time rotate speed of generator 10 is contrary, amplitude is identical, the sound wave that such generator 10 produces and the anti-phase sound wave that audio output device 40 sends offset, and then reduce the noise produced when generator 10 operates, improve the environment inside car of human pilot and passenger, avoid the loss adopting and reduce the method such as generator 10 output power and efficiency and cause simultaneously.
Further, described electrical signal collection unit 11 is connected with the output terminal of generator 10 direct supply, can realize the collection of the electric signal of electrical signal collection unit 11 pairs of generators 10 like this.
Further, preferably, described electrical signal collection unit 11 gathers the current signal that generator 10 produces, electric current antijamming capability is strong, and electrical signal collection unit 11 and chromacoder 20 are closely Signal transmissions, in order to reduce line loss, the current signal gathering generator 10 is ideal.
Further, electrical signal collection unit 11 comprises direct current transducer, described direct current transducer is Hall current sensor, the requirement of Hall current sensor to waveform is low, be suitable for wide frequency range, and overload capacity is strong, measurement range is wide, exactly by the current signal of the generator 10 of collection, and the current signal of generator 10 can be sent to chromacoder 20.
Further, described audio output device 40 is fixed on the cover of generator 10, and audio output device 40 is loudspeaker.As specific embodiments, described audio output device 40 can also be the sound equipment in car, and the rp-wave that generator 10 sound equipment operated in the sound wave and loudspeaker or car that send sends cancels each other, and realizes the object of noise reduction.
Claims (7)
1. the noise reduction system of a generator, comprise generator (10), it is characterized in that: described generator (10) is provided with electrical signal collection unit (11), electrical signal collection unit (11) is by signal wire harness successively connection signal conversion equipment (20), electronic control unit (30) and audio output device (40);
The noise figure that described electronic control unit (30) is corresponding under storing each rotating speed of generator;
Electrical signal collection unit (11) gathers the electric signal of generator (10), and the electric signal of generator (10) is sent to chromacoder (20), the electric signal that electrical signal collection unit (11) transmits is converted to the tach signal of generator (10) by chromacoder (20), and the tach signal of generator (10) is sent to electronic control unit (30), electronic control unit (30) exports control signal and drives audio output device (40) to send sound wave, the noise phase that described sound wave is corresponding with generator (10) real-time rotate speed is contrary, amplitude is identical.
2. the noise reduction system of generator according to claim 1, is characterized in that: described electrical signal collection unit (11) is connected with the output terminal of generator (10) direct supply.
3. the noise reduction system of generator according to claim 1 and 2, is characterized in that: described electrical signal collection unit (11) gathers the current signal that generator (10) produces.
4. the noise reduction system of generator according to claim 3, is characterized in that: described electrical signal collection unit (11) comprises direct current transducer.
5. the noise reduction system of generator according to claim 4, is characterized in that: described direct current transducer is Hall current sensor.
6. the noise reduction system of generator according to claim 1, is characterized in that: described audio output device (40) is fixed on the cover of generator (10), and audio output device (40) is loudspeaker.
7. the noise reduction system of generator according to claim 1, is characterized in that: described audio output device (40) is the sound equipment in car.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210524377.8A CN102982798B (en) | 2012-12-07 | 2012-12-07 | Noise reduction system of generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210524377.8A CN102982798B (en) | 2012-12-07 | 2012-12-07 | Noise reduction system of generator |
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| Publication Number | Publication Date |
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| CN102982798A CN102982798A (en) | 2013-03-20 |
| CN102982798B true CN102982798B (en) | 2015-07-15 |
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| CN201210524377.8A Active CN102982798B (en) | 2012-12-07 | 2012-12-07 | Noise reduction system of generator |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383843A (en) * | 2013-07-24 | 2013-11-06 | 海尔集团公司 | Active noise reduction method and device for washing machine and washing machine |
| CN104716772B (en) * | 2013-12-11 | 2017-08-04 | 北汽福田汽车股份有限公司 | Electric or hybrid automobile motor active noise reducing device |
| JP6368106B2 (en) * | 2014-02-20 | 2018-08-01 | 株式会社日立製作所 | Elevator device and noise reduction method |
| CN104217712B (en) * | 2014-09-19 | 2018-02-27 | 阿特拉斯科普柯(南京)建筑矿山设备有限公司 | The active noise reducing device and rock drilling machine of engineering machinery operating room |
| CN105449934A (en) * | 2015-11-23 | 2016-03-30 | 珠海格力电器股份有限公司 | Motor noise reduction system and method, and smoke exhaust ventilator |
| CN105508255A (en) * | 2015-12-31 | 2016-04-20 | 惠州市美亚飞电器有限公司 | Compressor used for oxygenerator and having noise reduction function and noise reduction method |
| CN106981285A (en) * | 2017-03-28 | 2017-07-25 | 联想(北京)有限公司 | A kind of noise-reduction method and robot system |
| CN108694935B (en) * | 2017-04-07 | 2020-06-19 | 比亚迪股份有限公司 | New energy vehicle and active noise reduction method and system thereof |
| CN109720288B (en) * | 2017-10-27 | 2019-11-22 | 比亚迪股份有限公司 | A kind of active denoising method, system and new energy vehicle |
| CN108962215A (en) * | 2018-08-31 | 2018-12-07 | 国网江苏省电力有限公司徐州供电分公司 | A kind of high-power electric reactor reduction noise control processing system and its control processing method based on self adaptive control |
| CN110979223B (en) * | 2018-09-30 | 2022-11-25 | 上海汽车集团股份有限公司 | Generator noise control method and device |
| CN109552281A (en) * | 2018-12-19 | 2019-04-02 | 浙江零跑科技有限公司 | New energy vehicle electronic parking wheel motor denoising device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2071213B1 (en) * | 2007-12-11 | 2014-12-03 | General Electric Company | Gearbox noise reduction by electrical drive control |
| US8306240B2 (en) * | 2008-10-20 | 2012-11-06 | Bose Corporation | Active noise reduction adaptive filter adaptation rate adjusting |
| KR20100086897A (en) * | 2009-01-23 | 2010-08-02 | 엘지전자 주식회사 | Method for noise reducing in washing machine and washing machine having the same |
| US8045725B2 (en) * | 2009-04-16 | 2011-10-25 | GM Global Technology Operations LLC | Vehicle interior active noise cancellation |
| US9214153B2 (en) * | 2010-09-29 | 2015-12-15 | GM Global Technology Operations LLC | Aural smoothing of a vehicle |
| WO2011137762A2 (en) * | 2011-05-09 | 2011-11-10 | 华为技术有限公司 | Rotating device noise control method and controller |
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