CN102314868A - Fan noise inhibition method and device - Google Patents
Fan noise inhibition method and device Download PDFInfo
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- CN102314868A CN102314868A CN2010102167928A CN201010216792A CN102314868A CN 102314868 A CN102314868 A CN 102314868A CN 2010102167928 A CN2010102167928 A CN 2010102167928A CN 201010216792 A CN201010216792 A CN 201010216792A CN 102314868 A CN102314868 A CN 102314868A
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- 230000005764 inhibitory process Effects 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000000452 restraining effect Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000002860 competitive effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 230000009183 running Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1781—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
- G10K11/17821—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions characterised by the analysis of the input signals only
- G10K11/17823—Reference signals, e.g. ambient acoustic environment
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/175—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound
- G10K11/178—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using interference effects; Masking sound by electro-acoustically regenerating the original acoustic waves in anti-phase
- G10K11/1787—General system configurations
- G10K11/17873—General system configurations using a reference signal without an error signal, e.g. pure feedforward
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/109—Compressors, e.g. fans
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K2210/00—Details of active noise control [ANC] covered by G10K11/178 but not provided for in any of its subgroups
- G10K2210/10—Applications
- G10K2210/11—Computers, i.e. ANC of the noise created by cooling fan, hard drive or the like
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0208—Noise filtering
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a fan noise inhibition method, which comprises the following steps of: obtaining the rotating speed of a fan; generating control signals to a sound producing module according to the rotating speed of the fan; and driving the sound producing module to generate fan noise inhibition signals at the rotating speed of the fan. The invention also provides a fan noise inhibition device. A processor obtains the rotating speed of the fan and generates the control signals to the sound producing module according to the rotating speed of the fan, and the sound producing module generates the fan noise inhibition signals at the rotating speed of the fan according to the control signals. The fan noise inhibition method and the device have the advantages that the implementation is convenient, and the cost is low.
Description
Technical field
Content of the present invention relates to wireless communication technology field, relates generally to a kind of inhibition method and apparatus of fan noise.
Background technology
Along with constantly dwindling of mobile communication network system small product size, special base station machine room need not built for base station equipment by operator, and is tending towards in existing building, putting system equipment.In densely populated residential district, operator rents a cover local-style dwelling houses at the high level of residential quarters usually and uses as machine room especially.Operator generally all can adopt the measure of environment alarm monitoring in machine room; Monitoring such as, temperature infrared, humidity, noise, water logging, smog, gate inhibition, dry contact such as machine room; These environmental variances are monitored, be beneficial to the maintenance of base station, be beneficial to the base station and safely and steadily run.
Wherein the noise index seems particularly important in above-mentioned applied environment.Because system product is placed and the residential district; Noise too affects near resident life; Attract complaint, increase the maintenance cost of operator, the noise figure of system product more and more becomes the aspect that the client pays close attention at present; Each producer also pays close attention to the noise of system product, even with these sharp weapon as the strike adversary.
The noise of system product is mainly derived from the fan of heat radiation, and when the fan full speed running, level of noise can reach 60～80 decibels, belongs to harmful scope.System product has all adopted different modes to suppress or has eliminated fan noise at present, for example adds quieter material at air inlet and air outlet, generally is sponge.This mode is unfavorable for the heat radiation of system product, has reduced the life-span of product.Adopt big air port and the low fan that hinders in addition, this mode has increased the cost of system product, has reduced competitiveness of product.
Summary of the invention
The technical matters that the present invention will solve provides a kind of inhibition method and apparatus of fan noise, improves life of product and competitive power.
In order to address the above problem, the invention provides a kind of inhibition method of fan noise, comprising:
Obtain rotation speed of the fan, produce according to said rotation speed of the fan and control signal to the sounding module, drive the inhibition signal that said sounding module produces the fan noise under the said rotation speed of the fan.
Further, said method also comprises,
The look-up table that prestores, the phase information of the fan noise that storage rotation speed of the fan and this rotation speed of the fan produce down in the said look-up table, perhaps phase place and amplitude information;
The step of said generation control signal comprises: after obtaining said rotation speed of the fan, search said look-up table, according to the phase information that finds, perhaps phase place and amplitude information produce said control signal.
Further, said method also comprises,
Said inhibition signal and said fan noise anti-phase that said sounding module produces.
Further, said method also comprises,
Said inhibition signal and said fan noise constant amplitude that said sounding module produces.
Further, said method also comprises,
Said fan is by its rotating speed of processor control, and said processor also receives the actual speed information of said fan feedback;
The said rotation speed of the fan that obtains comprises: said processor obtains said rotation speed of the fan according to the actual speed information of said fan feedback.
The present invention provides a kind of restraining device of fan noise, and said device comprises processor and sounding module, wherein:
Said processor is used for: obtain rotation speed of the fan, produce according to said rotation speed of the fan and control signal to the sounding module, to drive the inhibition signal that said sounding module produces the fan noise anti-phase under the said rotation speed of the fan;
Said sounding module is used for: the inhibition signal that produces the fan noise under the said rotation speed of the fan according to said control signal.
Wherein, said processor also is used for: the look-up table that prestores, the phase information of the fan noise that storage rotation speed of the fan and this rotation speed of the fan produce down in the said look-up table, perhaps phase place and amplitude information;
Said processor is to be used for: after obtaining said rotation speed of the fan, search said look-up table, obtain the phase information of the fan noise that produces under the said rotation speed of the fan; Perhaps phase place and amplitude information; According to the phase information of said fan noise, perhaps phase place and amplitude information produce said control signal.
Wherein, said inhibition signal and said fan noise constant amplitude.
Wherein, said inhibition signal and said fan noise anti-phase.
Wherein, said processor also is used for: control the rotating speed of said fan, and receive the actual speed information of said fan feedback; Said processor is to obtain said rotation speed of the fan according to the actual speed information of said fan feedback.
Compared with prior art, following advantage is arranged:
The noise suppressing method that the present invention proposes, through producing anti-phase squelch fan noise, have cost low, realize having a few easily; And, through presetting look-up table, saved the device of catching sensing, practiced thrift cost; In addition, the present invention can directly utilize system's existing hardware resource, need not add expensive equipment, has saved the hardware spending, has improved properties of product and competitive power.
The present invention is easy to use, goes for communication system products such as BBU, also can be used for the product that other need carry out squelch, and the present invention does not limit this.
Description of drawings
Fig. 1 is that device hardware of the present invention is formed synoptic diagram;
Fig. 2 is a software processes schematic flow sheet of the present invention.
Embodiment
Basic thought of the present invention is: the rotating speed of fan is to have to know definite value, and the system product ambient conditions under every kind of rotating speed is also confirmed and can be known.Deposit the fan noise phase information under each combined situation of confirming in a look-up table; By the control signal of an anti-phase of the corresponding output of processor drive the sounding module (such as; Loudspeaker) send with the noise of fan noise anti-phase offsetting fan noise, thereby reach the purpose that suppresses and eliminate fan noise.
The present invention provides a kind of restraining device of fan noise, comprising: processor and sounding module, and processor links to each other with the sounding module, wherein:
Said processor is used for: obtain rotation speed of the fan, produce according to said rotation speed of the fan and control signal to the sounding module, to drive the inhibition signal that said sounding module produces the fan noise under the said rotation speed of the fan;
Said sounding module is used for: the inhibition signal that produces the fan noise under the said rotation speed of the fan according to said control signal.
Said processor also is used for: the look-up table that prestores, phase information or the phase information and the amplitude information of the fan noise that storage rotation speed of the fan and this rotation speed of the fan produce down in the said look-up table; After processor obtains said rotation speed of the fan, search said look-up table,, produce said control signal according to the phase information that finds or phase place and amplitude information.The burning in advance of this look-up table is in the ROM of processor.Certainly, also store look-up tables is not obtained the relevant information of fan noise in real time, produces and suppresses signal.
Said inhibition signal and the anti-phase of said fan noise constant amplitude, certainly, also other phase places or amplitude and can produce inhibiting inhibition signal to fan noise.Preferably, suppress signal and the anti-phase of fan noise constant amplitude.
Said processor also is used for: before producing control signal according to said rotation speed of the fan, judge that whether said rotation speed of the fan surpasses predetermined threshold value, if surpass, just produces the said said sounding module that controls signal to.
Wherein, said processor also is used for: before producing control signal according to said rotation speed of the fan, judge that whether said rotation speed of the fan surpasses predetermined threshold value, if surpass, just produces the said said sounding module that controls signal to.
Wherein, the sounding module can comprise D/A converter, amplifier and loudspeaker, wherein:
By one of processor output loudspeaker control signal with the anti-phase of current fan noise constant amplitude; After D/A converter conversion and amplifier amplification; Export loudspeaker to; Drive the loudspeaker sounding, the reverse sound wave that noise sound wave that fan produces and loudspeaker send can be cancelled out each other, and reduces noise effectively.
Wherein, said processor is also controlled the rotating speed of said fan, and receives the actual speed information of said fan feedback; Said processor obtains said rotation speed of the fan according to the actual speed information of said fan feedback.Particularly, the exportable pwm signal of processor is via the rotating speed of D/A conversion and control fan, and actual simultaneously rotation speed of the fan value feeds back to processor after the A/D conversion, with the rotating speed of real-time adjustment fan.Processor can obtain current rotation speed of the fan through the fan rotating speed signals of fan feedback.
As shown in Figure 1; Specifically realize for one of fan noise restraining device of the present invention, comprising: radiator fan 105, analog/digital signal conversion device 106 and the digital/analog signal converter 107 of processor 101, D/A (digital/analog signal) converter 102, driving amplifier 103 (available simple triode is realized), loudspeaker 104 (can use common toy trumpet to realize), system product.Wherein, processor 101, D/A (digital/analog signal) converter 102, driving amplifier 103, A/D (analog/digital signal conversion device) 106 and D/A converter 107 all can adopt the existing device of system product to realize.
See shown in Figure 1ly, the tachometer value of fan is provided by processor, via D/A converter 107 conversion rear drive fan runnings.Deposit the system product fan environmental noise information under some rotating speeds a look-up table of processor in, noise information comprises the phase information of fan noise, perhaps phase information and amplitude information.
Fan feeds back the rotation speed of the fan feedback signals to processor 101 through A/D converter 106; Processor 101 obtains current rotation speed of the fan according to this rotation speed of the fan feedback signal; Search the look-up table that prestores according to current rotation speed of the fan; Processor, drives loudspeaker 104 and sends the noise of constant amplitude anti-phase after D/A converter 102 and driving amplifier 103 amplify according to the control signal of an anti-phase of the corresponding output of lookup result.According to Principles of Acoustics, can reduce or offset the amplitude of original noise, thereby reach the purpose that suppresses and eliminate the system product fan noise.
The present invention also provides a kind of fan noise inhibition method, comprising:
Obtain rotation speed of the fan, produce according to said rotation speed of the fan and control signal to the sounding module, drive the inhibition signal that said sounding module produces the fan noise under the said rotation speed of the fan.
Wherein, the look-up table that can prestore, the phase information of the fan noise that storage rotation speed of the fan and this rotation speed of the fan produce down in the said look-up table, perhaps phase place and amplitude information; After obtaining said rotation speed of the fan, search said look-up table, according to the phase information that finds, perhaps phase place and amplitude information produce said control signal.
Said inhibition signal and the anti-phase of said fan noise constant amplitude, certainly, also other phase places or amplitude and can produce inhibiting inhibition signal to fan noise.Preferably, suppress signal and the anti-phase of fan noise constant amplitude.
Wherein, before said rotation speed of the fan generation control signal, judge that also whether said rotation speed of the fan surpasses predetermined threshold value, if surpass, just produces the said said sounding module that controls signal to.
Said processor also is used for: control the rotating speed of said fan, and receive the actual speed information of said fan feedback; Said processor is to obtain said rotation speed of the fan according to the actual speed information of said fan feedback.
As shown in Figure 2, for fan noise of the present invention suppresses method flow diagram, comprising:
Step 201 according to the rotation speed of the fan feedback signal, is obtained rotation speed of the fan;
Step 202 is searched the look-up table that presets according to rotation speed of the fan;
Step 203 judges whether to find corresponding information; If have, execution in step 204, otherwise, execution in step 205;
Step 204 controls signal to loudspeaker according to lookup result output anti-phase;
Step 205, type information is printed current result: carried out squelch or successfully do not carried out squelch.
The present invention can adopt system product existing hardware resource, need not add expensive equipment, and this has just saved the hardware spending greatly, has improved performance of products and competitive power.
Claims (10)
1. the inhibition method of a fan noise is characterized in that, comprising:
Obtain rotation speed of the fan, produce according to said rotation speed of the fan and control signal to the sounding module, drive the inhibition signal that said sounding module produces the fan noise under the said rotation speed of the fan.
2. the method for claim 1 is characterized in that, said method also comprises,
The look-up table that prestores, the phase information of the fan noise that storage rotation speed of the fan and this rotation speed of the fan produce down in the said look-up table, perhaps phase place and amplitude information;
The step of said generation control signal comprises: after obtaining said rotation speed of the fan, search said look-up table, according to the phase information that finds, perhaps phase place and amplitude information produce said control signal.
3. according to claim 1 or claim 2 method is characterized in that,
Said inhibition signal and said fan noise anti-phase that said sounding module produces.
4. according to claim 1 or claim 2 method is characterized in that,
Said inhibition signal and said fan noise constant amplitude that said sounding module produces.
5. according to claim 1 or claim 2 method is characterized in that,
Said fan is by its rotating speed of processor control, and said processor also receives the actual speed information of said fan feedback;
The said rotation speed of the fan that obtains comprises: said processor obtains said rotation speed of the fan according to the actual speed information of said fan feedback.
6. the restraining device of a fan noise is characterized in that, said device comprises processor and sounding module, wherein:
Said processor is used for: obtain rotation speed of the fan, produce according to said rotation speed of the fan and control signal to the sounding module, to drive the inhibition signal that said sounding module produces the fan noise anti-phase under the said rotation speed of the fan;
Said sounding module is used for: the inhibition signal that produces the fan noise under the said rotation speed of the fan according to said control signal.
7. device as claimed in claim 6 is characterized in that,
Said processor also is used for: the look-up table that prestores, the phase information of the fan noise that storage rotation speed of the fan and this rotation speed of the fan produce down in the said look-up table, perhaps phase place and amplitude information;
Said processor is to be used for: after obtaining said rotation speed of the fan, search said look-up table, obtain the phase information of the fan noise that produces under the said rotation speed of the fan; Perhaps phase place and amplitude information; According to the phase information of said fan noise, perhaps phase place and amplitude information produce said control signal.
8. like claim 6 or 7 described devices, it is characterized in that,
Said inhibition signal and said fan noise constant amplitude.
9. like claim 6 or 7 described devices, it is characterized in that,
Said inhibition signal and said fan noise anti-phase.
10. like claim 6 or 7 described devices, it is characterized in that,
Said processor also is used for: control the rotating speed of said fan, and receive the actual speed information of said fan feedback;
Said processor is to obtain said rotation speed of the fan according to the actual speed information of said fan feedback.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102167928A CN102314868A (en) | 2010-06-30 | 2010-06-30 | Fan noise inhibition method and device |
| PCT/CN2011/076254 WO2012000404A1 (en) | 2010-06-30 | 2011-06-24 | Method and device for suppressing fan noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102167928A CN102314868A (en) | 2010-06-30 | 2010-06-30 | Fan noise inhibition method and device |
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| CN102314868A true CN102314868A (en) | 2012-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102167928A Pending CN102314868A (en) | 2010-06-30 | 2010-06-30 | Fan noise inhibition method and device |
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| CN (1) | CN102314868A (en) |
| WO (1) | WO2012000404A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014005460A1 (en) * | 2012-07-02 | 2014-01-09 | 华为技术有限公司 | Method, apparatus and system for noise reduction |
| CN105318490A (en) * | 2014-07-10 | 2016-02-10 | 珠海格力电器股份有限公司 | Control method and device for noise reduction of air conditioner |
| CN108986831A (en) * | 2017-05-31 | 2018-12-11 | 南宁富桂精密工业有限公司 | Method, electronic device and the computer readable storage medium of voice interference filtering |
| CN111905367A (en) * | 2020-07-17 | 2020-11-10 | 维沃移动通信有限公司 | Audio processing method and device, electronic equipment and readable storage medium |
| CN114120952A (en) * | 2021-11-02 | 2022-03-01 | 创维集团智能科技有限公司 | Audio noise reduction processing method and device, intelligent terminal and storage medium |
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| US20040243405A1 (en) * | 2003-05-29 | 2004-12-02 | International Business Machines Corporation | Service method for providing autonomic manipulation of noise sources within computers |
| CN101727895A (en) * | 2008-10-20 | 2010-06-09 | 联想(北京)有限公司 | Noise reduction device, computer and noise reduction method |
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| KR20020055288A (en) * | 2000-12-28 | 2002-07-08 | 구자홍 | Fan device having a active noise control ability |
| TW200826062A (en) * | 2008-01-15 | 2008-06-16 | Asia Vital Components Co Ltd | System of inhibiting broadband noise of communication equipment room |
| TWI405909B (en) * | 2008-01-15 | 2013-08-21 | Asia Vital Components Co Ltd | Fan noise cancellation system |
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- 2011-06-24 WO PCT/CN2011/076254 patent/WO2012000404A1/en active Application Filing
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| US20040243405A1 (en) * | 2003-05-29 | 2004-12-02 | International Business Machines Corporation | Service method for providing autonomic manipulation of noise sources within computers |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014005460A1 (en) * | 2012-07-02 | 2014-01-09 | 华为技术有限公司 | Method, apparatus and system for noise reduction |
| CN103531195A (en) * | 2012-07-02 | 2014-01-22 | 华为技术有限公司 | Noise reduction method, equipment and system |
| EP2682940A3 (en) * | 2012-07-02 | 2014-04-16 | Huawei Technologies Co., Ltd. | Noise reduction method, device, and system |
| CN105318490A (en) * | 2014-07-10 | 2016-02-10 | 珠海格力电器股份有限公司 | Control method and device for noise reduction of air conditioner |
| CN108986831A (en) * | 2017-05-31 | 2018-12-11 | 南宁富桂精密工业有限公司 | Method, electronic device and the computer readable storage medium of voice interference filtering |
| CN108986831B (en) * | 2017-05-31 | 2021-04-20 | 南宁富桂精密工业有限公司 | Method for filtering voice interference, electronic device and computer readable storage medium |
| CN111905367A (en) * | 2020-07-17 | 2020-11-10 | 维沃移动通信有限公司 | Audio processing method and device, electronic equipment and readable storage medium |
| CN111905367B (en) * | 2020-07-17 | 2024-04-19 | 维沃移动通信有限公司 | Audio processing method, device, electronic equipment and readable storage medium |
| CN114120952A (en) * | 2021-11-02 | 2022-03-01 | 创维集团智能科技有限公司 | Audio noise reduction processing method and device, intelligent terminal and storage medium |
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| Publication number | Publication date |
|---|---|
| WO2012000404A1 (en) | 2012-01-05 |
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Application publication date: 20120111 |