CN1694161A - Control system for active noise of hydraulic pump - Google Patents
Control system for active noise of hydraulic pump Download PDFInfo
- Publication number
- CN1694161A CN1694161A CN200510038058.6A CN200510038058A CN1694161A CN 1694161 A CN1694161 A CN 1694161A CN 200510038058 A CN200510038058 A CN 200510038058A CN 1694161 A CN1694161 A CN 1694161A
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- hydraulic pump
- noise
- control system
- active
- sound insulation
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- 230000003044 adaptive effect Effects 0.000 claims description 12
- 230000000694 effects Effects 0.000 abstract description 11
- 238000009413 insulation Methods 0.000 abstract description 9
- 238000001228 spectrum Methods 0.000 description 7
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a hydraulic pressure pump active noise control system, which comprises the sound insulation cover, muffler, control source, microphone, tachometer and multicenter self-adapt active controller, it can not only better control the branch value of the hydraulic pressure pump above the 600HZ, but also preferable control the one below the 600HZ, its automaticity is higher, has good sound insulation effect in the low frequency, compared to the decrease noise capability of the traditional sound insulation cover, it can increase its decrease noise capability in the condition that containing the volume of the former sound insulation cover; at the same time, affected slightly by the scene installment space, can minish the volume of the cover in the condition that containing the effect of sound insulation and decrease noise.
Description
One, technical field
The present invention relates to a kind of noise control system, relate in particular to a kind of noise control system of hydraulic pump.
Two, background technology
Hydraulic pump is the power source in the liquid transfer system, it produces two noise likes: a class is the hydrodynamic noise, another kind of is mechanical noise, its noise spectrum characteristics be some with drive the relevant line spectrum component of rotating speed, wherein the noise that environmental pollution is bigger is to concentrate on low frequency.What China Machine Press 2002 published " discloses the employing acoustic hood in the noise and vibration control engineering handbook and has come the confining liquid press pump, thereby utilized the sound insulation function of sound insulating material and the sound absorption function of liner acoustic absorbant to reduce the hydraulic pump noise control method of hydraulic pump to noise pollution on every side.When this technology adopts totally enclosed acoustic hood to completely cut off the noise radiation of hydraulic pump, ventilation and heat dissipation problem have also been brought, the solution of taking at present is to introduce sound suppressor to solve ventilation and heat dissipation problem, but the result who brings is the control poor effect of low-frequency noise.In this case, have only the thickness by the thickening acoustic hood, the length of growth sound suppressor to solve the problem of low frequency oise insulation factor deficiency, must cause the acoustic hood volume to increase like this.But under some field condition, particularly space environment complexity, facility are gathered around under the tight situation around, and space does not on every side allow the acoustic hood volume excessive, thereby the volume that so just can't increase acoustic hood can't improve defening effect.Therefore, this employing acoustic hood carries out the shortcoming of the scheme of noise control and is: 1, to the low-frequency noise control poor effect of hydraulic pump; 2, be subjected to the restriction of installing space on every side in actual use.
The development of modern electronic technology, signal Processing, control theory and transducer technology makes active noise control system be widely used in field of noise control.Practical at present active guidance system comprises: the Active noise control using in Active noise control using, aircraft and the car cabin in active antinoise earmuff, the pipeline and the active control of transformer single-frequency noise, but the system that present both at home and abroad no-trump active noise control system still and traditional acoustic hood combine and use.Be published in the 6th page the-the 8th page of " noise and vibration control " second phase calendar year 2001 " an active control experimental study of highly-intensified diesel engine exhaust noise ", the 253rd page the-the 257th page " helicopter cabin noise self-adaptation internal model control simulation experiment study " being published in " Nanjing Aero-Space University's journal " the 35th phase in 2003 discloses the Active noise control using technology aspect the active control that sound imports into and in the pipeline, the application of the active control aspect of small volume space, and still active noise control system is not applied to precedent in the hydraulic pump acoustic hood system at home and abroad.
Three, summary of the invention
1, goal of the invention: the purpose of this invention is to provide a kind of low frequency defening effect good, be subjected to the little hydraulic pump noise control system of installing space condition influence.
2, technical scheme: in order to reach the foregoing invention purpose, control system for active noise of hydraulic pump of the present invention, comprise acoustic hood, acoustic hood is provided with sound suppressor, this system also comprises Controlling Source, microphone, velocity gauge and multi-channel adaptive active controller, and wherein, velocity gauge is installed in the rotating shaft of hydraulic pump, the multi-channel adaptive active controller is located at outside the acoustic hood, and Controlling Source, microphone and velocity gauge are connected with the multi-channel adaptive active controller respectively; Controlling Source is distributed in the top of hydraulic pump and on every side, and should press close to hydraulic pump and install, and distance is near more, and native system is then good more to the control effect of the low frequency spectrum lines component of noise.
Controlling Source can adopt loudspeaker, also can adopt vibrator, electromagnetic driver.
Microphone can adopt Electret condenser microphone, and can improve Electret condenser microphone according to field condition.
Acoustic hood in the control system for active noise of hydraulic pump of the present invention and sound suppressor are primarily aimed at the high-frequency noises of hydraulic pump.
Other devices in the control system for active noise of hydraulic pump of the present invention are then controlled the low frequency spectrum lines component of hydraulic pump noise specially.Velocity gauge is installed in the rotating shaft of hydraulic pump and obtains rotary speed information, sound field information in microphone is placed on and obtains in the acoustic hood to cover, the information of these sensors is all by feed-in multi-channel adaptive active controller, the multi-channel adaptive active controller produces control signal corresponding then, the drive controlling source, Controlling Source is then started working, and reduces the radiation of the low frequency spectrum lines component of hydraulic pump.
Principle of the present invention is: traditional acoustic hood has for the noise component more than the hydraulic pump 600Hz controls effect preferably, but for the noise component below the hydraulic pump 600Hz, though acoustic hood and sound suppressor still have certain effect for low-frequency noise, but because the characteristics of noise low-frequency sound wave, its the low frequency defening effect must poor, can't reach desired sound insulation index in the reality.Active system part of the present invention then is special in the noise component below the 600Hz, after the noise signal that microphone obtains, send control signal by the active adaptive controller to loudspeaker, drive speaker operation, thereby reach the purpose of the low frequency spectrum lines component that reduces hydraulic pump.
3, beneficial effect: the present invention has following advantage: (1) low frequency defening effect is good, compares with the noise reduction of traditional acoustic hood, can increase its low frequency anti-acoustic capability under the condition of the volume that keeps former acoustic hood; (2) it is little influenced by on-the-spot installing space, can be under the condition that keeps the sound insulation and noise reducing performance, and the acoustic hood volume that reduces to use is little.
Four, description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the vertical view of Fig. 1, and is clear in order to represent, omitted the loudspeaker of hydraulic pump top among the figure.
Five, embodiment
Embodiment 1: the hydraulic pump noise that control is measured, if its overriding noise frequency spectrum covers the frequency range of broad, when adopting bigger volume of traditional acoustic hood needs or low frequency noise reduction bad, then should be adopted the present invention.
At first measure the required noise reduction that reaches of noise and the frequency range thereof of hydraulic pump, adopt the data measure then, the position and the number of microphone and Controlling Source is optimized.Used optimization method can be referring to " the noise and vibration control engineering handbook of " adaptive active noise control-principle, algorithm and realization " and the China Machine Press version in 2002 of publishing house of Northwestern Polytechnical University version in 1993.
As shown in Figure 1 and Figure 2, the control system for active noise of hydraulic pump of present embodiment, comprise acoustic hood 1, acoustic hood 1 is provided with sound suppressor 2, this system also comprises Controlling Source 3, microphone 4, velocity gauge 5 and multi-channel adaptive active controller 6, and velocity gauge 5 is installed in the rotating shaft of hydraulic pump 7, and multi-channel adaptive active controller 6 is located at outside the acoustic hood 1, Controlling Source 3, microphone 4 and velocity gauge 5 are connected 6 with the multi-channel adaptive active controller respectively, and connecting circuit adopts prior art;
Controlling Source 3 adopts loudspeakers, and number is 8, is distributed on the top of hydraulic pump 7 and on every side, and wherein two loudspeakers are positioned at the top of hydraulic pump 7, all the other 6 be distributed on hydraulic pump 7 around;
Microphone 4 is an Electret condenser microphone, and number is 8, is installed in the acoustic hood 1.
Claims (5)
1, a kind of control system for active noise of hydraulic pump, comprise acoustic hood (1), acoustic hood (1) is provided with sound suppressor (2), it is characterized in that: this system also comprises Controlling Source (3), microphone (4), velocity gauge (5) and multi-channel adaptive active controller (6), wherein, velocity gauge (5) is installed in the rotating shaft of hydraulic pump (7), and Controlling Source (3), microphone (4) and velocity gauge (5) are connected with the multi-channel adaptive active controller (6) that is positioned at acoustic hood (1) outside respectively; Controlling Source (3) is distributed in the top of hydraulic pump (7) and on every side.
2, control system for active noise of hydraulic pump as claimed in claim 1 is characterized in that: Controlling Source (3) is distributed on the top of hydraulic pump (7) and on every side.
3, control system for active noise of hydraulic pump as claimed in claim 1 or 2 is characterized in that: Controlling Source (3) abuts against the top of hydraulic pump (7) and on every side.
4, control system for active noise of hydraulic pump as claimed in claim 1 or 2 is characterized in that: Controlling Source (3) is a loudspeaker.
5, control system for active noise of hydraulic pump as claimed in claim 1 is characterized in that: microphone (4) is an Electret condenser microphone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100380586A CN100358005C (en) | 2005-03-10 | 2005-03-10 | Control system for active noise of hydraulic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100380586A CN100358005C (en) | 2005-03-10 | 2005-03-10 | Control system for active noise of hydraulic pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1694161A true CN1694161A (en) | 2005-11-09 |
| CN100358005C CN100358005C (en) | 2007-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100380586A Expired - Fee Related CN100358005C (en) | 2005-03-10 | 2005-03-10 | Control system for active noise of hydraulic pump |
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| Country | Link |
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| CN (1) | CN100358005C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852056A (en) * | 2010-06-28 | 2010-10-06 | 四川正升声学科技有限公司 | Active ventilated and soundproof window |
| CN102208263A (en) * | 2011-02-24 | 2011-10-05 | 南京大学 | Multi-channel active noise control system for power transformer |
| CN104616650A (en) * | 2015-02-10 | 2015-05-13 | 南京信息工程大学 | Noise reduction device suitable for small space |
| CN108093337A (en) * | 2017-12-23 | 2018-05-29 | 广州市尊浪电器有限公司 | Noise reducing sound box component |
| CN110056495A (en) * | 2018-12-25 | 2019-07-26 | 浙江零跑科技有限公司 | New energy vehicle electric vacuum pump active noise reducing device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101635144B (en) * | 2008-09-23 | 2011-12-28 | 青岛理工大学 | Sound insulation cover with intelligently controlled sound insulation amount |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993025879A1 (en) * | 1992-06-10 | 1993-12-23 | Noise Cancellation Technologies, Inc. | Active acoustical controlled enclosure |
| JPH08314473A (en) * | 1995-05-16 | 1996-11-29 | Nippon Avionics Co Ltd | Soundproofing device |
-
2005
- 2005-03-10 CN CNB2005100380586A patent/CN100358005C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852056A (en) * | 2010-06-28 | 2010-10-06 | 四川正升声学科技有限公司 | Active ventilated and soundproof window |
| CN102208263A (en) * | 2011-02-24 | 2011-10-05 | 南京大学 | Multi-channel active noise control system for power transformer |
| CN102208263B (en) * | 2011-02-24 | 2013-04-10 | 南京大学 | Multi-channel active noise control system for power transformer |
| CN104616650A (en) * | 2015-02-10 | 2015-05-13 | 南京信息工程大学 | Noise reduction device suitable for small space |
| CN108093337A (en) * | 2017-12-23 | 2018-05-29 | 广州市尊浪电器有限公司 | Noise reducing sound box component |
| CN108093337B (en) * | 2017-12-23 | 2019-08-02 | 广州市尊浪电器有限公司 | Noise reducing sound box component |
| CN110056495A (en) * | 2018-12-25 | 2019-07-26 | 浙江零跑科技有限公司 | New energy vehicle electric vacuum pump active noise reducing device |
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| Publication number | Publication date |
|---|---|
| CN100358005C (en) | 2007-12-26 |
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Granted publication date: 20071226 Termination date: 20100310 |