CN101369422A - Active denoising method - Google Patents
Active denoising method Download PDFInfo
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- CN101369422A CN101369422A CNA2008101676001A CN200810167600A CN101369422A CN 101369422 A CN101369422 A CN 101369422A CN A2008101676001 A CNA2008101676001 A CN A2008101676001A CN 200810167600 A CN200810167600 A CN 200810167600A CN 101369422 A CN101369422 A CN 101369422A
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Abstract
The invention discloses a method for actively reducing noise, which comprises at different directions in space influenced by steady, continuous, regular noise sent out by the device, detecting noise sent out by a device using a sound detector; analyzing characteristics of direction, frequency, wavelength and amplitude of the noise; arranging speaker facing to noise source respectively at different directions according to the characteristic of direction of the noise; sending out reverse sound wave according to the characteristics of frequency, wavelength and amplitude to counteract or reduce noise sent out by the noise source in the space. The invention uses the reverse sound wave to counteract or reduce noise, not only can effectively eliminate or reduce noise pollution in working environment of the operation personnel, but also has stronger pertinency and more convenient implementation.
Description
Technical field
The present invention relates to a kind of active noise reduction method, especially a kind of active noise reduction method that is applied on printing and the field device.
Background technology
Along with science and technology development, we have been full of various automated production equipments at one's side, when these equipment have improved our productive capacity, have brought noise pollution also for our working environment.Because an environment that is full of noise not only causes interference to people's operate as normal, when serious even the physical and mental health that can endanger people, for this reason, people adopt various means to eliminate or reduce noise, in the hope of build a quiet working environment for people.
Past people means commonly used have: eliminate the noise that produces because of vibrations by increasing glissando, utilize the housing that acoustical material is housed to come shielding noise, reduce noise by special noise-reducing structure is set, and as the exhaust box of using on the engine, or the like.No matter but be that the sort of means all have its limitation, often to be subjected to the restriction of factors such as noise types, environment for use, installing space, device structure and cost in the practical application, be difficult to effectively be applied on some particular devices, as the printing machine of print field, cleaning-sorting machine, paper machine etc., and these equipment produce continues, be engraved in the physical and mental health that is endangering operating personnel during regular noise.
Summary of the invention
Noise that continue, regular at equipment generations such as the printing machine in existing printing and the association area, cleaning-sorting machine, paper machines, the object of the present invention is to provide a kind of active noise reduction method, utilize this method noise of suppression equipment generation effectively, for operating personnel create a quiet working environment.
For achieving the above object, a kind of active noise reduction method of the present invention, be specially: equipment send stable, continue, different azimuth in the space that regular noise influenced, utilize sound-detection gear that the noise that equipment sends is surveyed, analyze direction, frequency, wavelength, the amplitude characteristic of noise, according to the directivity characteristics of noise respectively at the loudspeaker of different azimuth setting towards noise source, and make loudspeaker send anti-phase sound wave according to frequency, amplitude, the wavelength characteristic of noise, in the space, to offset or to subdue the noise that noise source sends.
Further, described space is the movable space of equipment operator.
Further, described loudspeaker is arranged in the cavity around its noise source on the equipment, or is arranged on the equipment its noise in the space of external diffusion.
A kind of active noise reduction method, be specially: at each stable sends noise source lasting, regular noise on the equipment, different azimuth in its surrounding space utilizes sound-detection gear that the noise that this noise source sends is surveyed, analyze direction, frequency, wavelength, the amplitude characteristic of noise, according to the directivity characteristics of noise respectively at the loudspeaker of different azimuth setting towards noise source, and make loudspeaker send anti-phase sound wave according to frequency, amplitude, the wavelength characteristic of noise, in the space, to offset or to subdue the noise that noise source sends.
Further, described equipment is printing machine.
Further, described equipment is cleaning-sorting machine.
Further, described equipment is paper machine.
The present invention utilizes anti-phase sound wave to offset or subdues noise, not only can eliminate or reduce the noise pollution in operating personnel's working environment effectively, and specific aim is stronger, implements easier.
Description of drawings
Fig. 1 a is the basic structure synoptic diagram of cylinder on the printing machine;
Fig. 1 b is the synoptic diagram of cylindrical shell section structure shown in the sequence number 2 among Fig. 1 a;
Fig. 2 is the arrangement synoptic diagram of plate cylinder, blanket cylinder and impression cylinder;
Fig. 3 is provided with the synoptic diagram of sound-detection gear, loudspeaker and feedback capture device on three dimensions for the present invention;
Fig. 4 is the synoptic diagram that the noise of opposite sound wave of active noise-abatement equipment generation wavelength same phase and printing machine self is cancelled each other;
Fig. 5 specifically is provided with the synoptic diagram of sound-detection gear, loudspeaker and feedback capture device for the present invention.
Embodiment
The present invention is by being provided with initiatively sound-producing device, sends identically with frequency noise, wavelength, and the sound that phase place is opposite is offset or reduced noise, finishes the active noise reduction of equipment.Its principle is very simple in fact, and expressing with mathematical linguistics is exactly (+1)+(1)=0, and the method that this method utilizes the repercussion stack of sound to offset is finished.
Sound is propagated in the space, be that a solid space is propagated, in order to obtain noise reduction and noise elimination effect in the space, in the directed Research of Noise Reduction of space free sound field, be that the acoustic attenuation zone that a spherical sound wave forms in space interference has been set up device as shown in Figure 3, describe on this basis.0 is the point source of sound of noise, and A1, A2, A3 are sound-detection gears, and B1, B2, B3 are loudspeakers, and C1, C2, C3 are the feedback capture devices.When loudspeaker was installed, requiring B1, B2, B3 was the N doubly (N is an integer) of noise wavelength to the distance of 0 of sound source, because under different frequency and environment, noise wavelength is can change, so loudspeaker B1, B2, B3 point are transportable.
It is a specific character of utilizing sound wave: wavelength is identical and sound wave that phase place is opposite can be cancelled each other, this specific character requires wavelength and the phase place of printing machine according to self noise, utilizing initiatively, sound-producing device produces the opposite sound wave 13 of wavelength same phase, cancel each other with the noise 12 of printing machine self, reach the purpose of eliminating or reducing noise intensity, as shown in Figure 4.
Basic demand to the active noise reduction control system is: 1) under identical audio frequency, there is identical amplitude response in system; 2) in the noise control zone, anti-sound wave and the phase-shift characterisitc of former sound wave under same frequency are 180 degree; 3) anti-sound source is carried out feedback effect timely to the sound-detection gear of system.
Sound-detection gear 9 and loudspeaker 11 are installed near around noise source in the space in (for example in blanket cylinder 7 and impression cylinder 8 centre positions) a plurality of positions, as shown in Figure 5; Sound-detection gear 9 is used for detecting the amplitude-frequency of sound and the value of phase-frequency characteristic, and as parameters such as wavelength, amplitude, frequencies, the utilization control theory produces another anti-phase transmission sound function in time according to the sound wave of sound-detection gear 9.Loudspeaker 11 is to generate anti-phase sound wave according to the transmission sound function, and its waveforms amplitude is opposite with the former noise in synchronous space, when meeting with former noise, because phase place is opposite, cuts down or offsets, and reaches the purpose of noise reduction.
For example, printing element is the core of printing machine, and it has directly determined the quality height of printing.The printing element of modern printing machine generally is made up of inking mechanism, water delivery mechanism, plate cylinder, blanket cylinder, impression cylinder, clutch pressure mechanism and pressure regulating device.Drum segment is one of the most basic assembly of printing machine, and the basic structure of printing machine is exactly three cylinders, i.e. plate cylinder, blanket cylinder and impression cylinder.Printing ink is transferred on the blanket cylinder from forme under the effect of squeegee pressure, is transferred on the impression cylinder by blanket cylinder again, finishes printing.It has often been said that " not having pressure just not have printing " the words has proved absolutely the importance of squeegee pressure.
The formation of drum part and characteristics thereof: the drum part of sheet-fed press mainly contains plate cylinder, blanket cylinder and impression cylinder.As shown in Figure 1a, the structure of each cylinder is basic identical, promptly by axle journal 4, roll the pillow 1 and cylindrical shell 2 constitute.Axle journal 4 is supporting parts of cylinder, to guaranteeing that cylinder at the uniform velocity turns round and print quality plays an important role.
Be surrounded by liner outside the cylindrical shell 2 of cylinder, it is the working position of direct hectographic printing picture and text.Shown in Fig. 1 b, cylindrical shell 2 is made up of effective printing area 3 and space 5 (breach) two parts, useful area 3 is in order to print or transfer printing image-text, and space 5 (breach) part is mainly stung paper tooth (impression cylinder), blanket strainer (blanket cylinder), printing plate holding and governor motion (plate cylinder) in order to installation.Effectively printing area 3 is usually with (360 °-α)/360 ° represent of cylinder usage factor K=.Owing to certain arrangement angle is arranged between the cylinder, guarantee that when printing space 5 is meshing with each other between the cylinder.
Before the position of cylinder combined pressure must soon contact in the space of plate cylinder and blanket cylinder, and the tripping position must make the trace on the blanket cylinder can all be transferred on the paper that wraps in the impression cylinder surface, does not allow simultaneously the ink marks on the forme begin again to be transferred on the blanket cylinder.In other words, blanket cylinder and plate cylinder, blanket cylinder and impression cylinder tripping, combined pressure all should be carried out in position, cylinder space.
Owing to the processing of machine with install and all exist many-sided reasons such as play that sum of errors is contained in the cylinder journal bearing, make the place that is in contact with one another between cylinder uniformity fully, in order to form contact, need add certain pressure; Arrange as shown in Figure 2 between plate cylinder 6, blanket cylinder 7 and the impression cylinder 8, they are when rotating, and barrel and barrel, space and space are meshing with each other, and print (particularly the pressure of intaglio printing press is very big) under certain pressure.When entering the engagement of barrel in the space,,, produce certain impact, occurred noise thus in the moment that barrel is in contact with one another because bigger squeegee pressure is arranged.At present for this noise solution preferably not also, and if the noise of not trying every possible means to reduce will form noise pollution near the operating personnel the machine, thereby influence operating personnel's physical and mental health.
Identical with printing machine is can produce stable, lasting, regular noise too in the cleaning-sorting machine course of work in the print field.A noise source is exactly its sorting equipment in the cleaning-sorting machine, when the suction device in the sorting equipment is operated, can produce and allow the very uncomfortable high-decibel noise of people.The high pressure suction noise is a kind of of air-breathing post flow noise.The characteristics of air-breathing post flow noise are the sound level height, propagate far.Air-breathing post flow noise is a static air around being sheared by impact of high speed inspiratory flow and letter sorting drum high speed rotating, causes that violent gas pulsation produces.In addition, transmitting material clashes into suction device when the material buttress is gone up paper feed and also can make a noise.
Also have, also there is noise problem in paper machine in the print field, peel off the position along with peeling off of paper produces air flow at once at paper on the paper machine couch roll, these noises are to scratch and produce owing to the air-flow that air eddy generation in flow process, impact or pressure jump cause.As: the suction couch roll of web part of paper machine, the reason that occurs in the gaseousness noise of suction couch roll system is: because the aperture of vacuum roll surface is by behind the vacuum chamber, when being returned to atmospheric pressure suddenly by the vacuum state of drying zone in the hole, air passes through aperture at a high speed, cause vibration, form the result of sound source.This noise source is from two aspects: the sounding of first suction couch roll aperture, be similar to the intratubular air vibration of end sealing, and this main oscillations wavelength that is penetrated aperture at a high speed and caused by air is relevant with little length of tube; It two is that aperture is to enter atmosphere by the sealing strip of vacuum chamber by rows by certain arrangement mode in the rotation of couch roll, causes the air vibration sound of couch roll along sense of rotation.The frequency of this sounding is relevant with the pitch of the peripheral speed of couch roll inwall and aperture.Above-mentioned two kinds of set of oscillations become the harmonic wave of intensity maximum in the suction couch roll system noise.
Above-mentioned cleaning-sorting machine and paper machine all can be gathered and analyze the characteristic of noise by the mode identical with printing machine, and initiatively sound-producing device is set, initiatively to eliminate or to reduce the noise of equipment.
It is pointed out that stable, lasting, the regular noise that produces at equipment, both can comprehensively suppress, also can only carry out the elimination or the reduction of noise at operating personnel's activity space.
In addition, because of the noise source on the equipment can not be in the unsettled all around space usually, some orientation tend to be blocked by other devices or structure around it, thereby noise will never block more cavity or the space in be diffused in the space at operating personnel place, therefore, when the active sound-producing device is set, can be arranged on targetedly in the outside cavity of propagating or space of noise.
Claims (8)
1. active noise reduction method, be specially: equipment send stable, continue, different azimuth in the space that regular noise influenced, utilize sound-detection gear that the noise that equipment sends is surveyed, analyze direction, frequency, wavelength, the amplitude characteristic of noise, according to the directivity characteristics of noise respectively at the loudspeaker of different azimuth setting towards noise source, and make loudspeaker send anti-phase sound wave according to frequency, amplitude, the wavelength characteristic of noise, in the space, to offset or to subdue the noise that noise source sends.
2. active noise reduction method as claimed in claim 1 is characterized in that, described space is the movable space of equipment operator.
3. active noise reduction method as claimed in claim 1 or 2 is characterized in that, described loudspeaker is arranged in the cavity around its noise source on the equipment, or is arranged on the equipment its noise in the space of external diffusion.
4. active noise reduction method as claimed in claim 3 is characterized in that, described equipment is printing machine or cleaning-sorting machine or paper machine.
5. active noise reduction method, be specially: at each stable sends noise source lasting, regular noise on the equipment, different azimuth in its surrounding space utilizes sound-detection gear that the noise that this noise source sends is surveyed, analyze direction, frequency, wavelength, the amplitude characteristic of noise, according to the directivity characteristics of noise respectively at the loudspeaker of different azimuth setting towards noise source, and make loudspeaker send anti-phase sound wave according to frequency, amplitude, the wavelength characteristic of noise, in the space, to offset or to subdue the noise that noise source sends.
6. active noise reduction method as claimed in claim 5 is characterized in that, described space is the movable space of equipment operator.
7. as claim 5 or 6 described active noise reduction methods, it is characterized in that described loudspeaker is arranged in the cavity around its noise source on the equipment, or be arranged on the equipment its noise in the space of external diffusion.
8. active noise reduction method as claimed in claim 7 is characterized in that, described equipment is printing machine or cleaning-sorting machine or paper machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101676001A CN101369422A (en) | 2008-04-22 | 2008-10-14 | Active denoising method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101046134A CN101261830A (en) | 2008-04-22 | 2008-04-22 | A noise reduction method for printing unit of a printer |
| CN200810104613.4 | 2008-04-22 | ||
| CNA2008101676001A CN101369422A (en) | 2008-04-22 | 2008-10-14 | Active denoising method |
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| Publication Number | Publication Date |
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| CN101369422A true CN101369422A (en) | 2009-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101046134A Pending CN101261830A (en) | 2008-04-22 | 2008-04-22 | A noise reduction method for printing unit of a printer |
| CNA2008101676001A Pending CN101369422A (en) | 2008-04-22 | 2008-10-14 | Active denoising method |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008101046134A Pending CN101261830A (en) | 2008-04-22 | 2008-04-22 | A noise reduction method for printing unit of a printer |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015066926A1 (en) * | 2013-11-11 | 2015-05-14 | 赵春宁 | Noise reduction method |
| CN104978954A (en) * | 2014-04-10 | 2015-10-14 | 罗伯特·博世有限公司 | Noise Emission Device And Method For Compensating Noise Of Machine |
| CN105183946A (en) * | 2015-08-11 | 2015-12-23 | 珠海格力电器股份有限公司 | Air conditioner based denoising method and system |
| CN106647346A (en) * | 2016-09-26 | 2017-05-10 | 郑州云海信息技术有限公司 | Electronic noise reduction system control method and device |
| CN106847254A (en) * | 2017-03-17 | 2017-06-13 | 浙江大学 | A kind of locality active noise reduction system |
| WO2017101067A1 (en) * | 2015-12-17 | 2017-06-22 | 华为技术有限公司 | Ambient sound processing method and device |
| CN108093337A (en) * | 2017-12-23 | 2018-05-29 | 广州市尊浪电器有限公司 | Noise reducing sound box component |
| CN108932940A (en) * | 2018-07-05 | 2018-12-04 | 浙江众邦机电科技有限公司 | A kind of industrial sewing machine noise-reduction method, device and equipment based on Operation Conditions |
| CN110459199A (en) * | 2019-08-01 | 2019-11-15 | 固高科技(深圳)有限公司 | The noise-reduction method and engraving machine of engraving machine |
| CN112643722A (en) * | 2020-11-04 | 2021-04-13 | 深圳素士科技股份有限公司 | Shaver head and shaver |
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| CN103419486A (en) * | 2013-08-08 | 2013-12-04 | 潍坊浩田印刷机械有限公司 | Noise elimination device and small adhesive tape printing machine composed of same |
| CN106328118A (en) * | 2016-08-31 | 2017-01-11 | 江苏大学 | Sound attenuation device and method |
| CN110033754A (en) * | 2018-01-11 | 2019-07-19 | 深圳市诚壹科技有限公司 | A kind of noise-reduction method, device, terminal device and computer readable storage medium |
| CN108376542A (en) * | 2018-04-19 | 2018-08-07 | 广东万家乐燃气具有限公司 | A kind of gas heater of active noise reduction |
| CN110738978A (en) * | 2018-07-20 | 2020-01-31 | 卢笛 | noise eliminator for study or office |
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2008
- 2008-04-22 CN CNA2008101046134A patent/CN101261830A/en active Pending
- 2008-10-14 CN CNA2008101676001A patent/CN101369422A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015066926A1 (en) * | 2013-11-11 | 2015-05-14 | 赵春宁 | Noise reduction method |
| CN105103219A (en) * | 2013-11-11 | 2015-11-25 | 赵春宁 | Noise reduction method |
| CN104978954A (en) * | 2014-04-10 | 2015-10-14 | 罗伯特·博世有限公司 | Noise Emission Device And Method For Compensating Noise Of Machine |
| CN105183946A (en) * | 2015-08-11 | 2015-12-23 | 珠海格力电器股份有限公司 | Air conditioner based denoising method and system |
| WO2017101067A1 (en) * | 2015-12-17 | 2017-06-22 | 华为技术有限公司 | Ambient sound processing method and device |
| CN107533839A (en) * | 2015-12-17 | 2018-01-02 | 华为技术有限公司 | A kind of processing method and equipment to surrounding environment sound |
| CN107533839B (en) * | 2015-12-17 | 2021-02-23 | 华为技术有限公司 | Method and device for processing ambient environment sound |
| US10978041B2 (en) | 2015-12-17 | 2021-04-13 | Huawei Technologies Co., Ltd. | Ambient sound processing method and device |
| CN106647346A (en) * | 2016-09-26 | 2017-05-10 | 郑州云海信息技术有限公司 | Electronic noise reduction system control method and device |
| CN106847254A (en) * | 2017-03-17 | 2017-06-13 | 浙江大学 | A kind of locality active noise reduction system |
| CN108093337A (en) * | 2017-12-23 | 2018-05-29 | 广州市尊浪电器有限公司 | Noise reducing sound box component |
| CN108932940A (en) * | 2018-07-05 | 2018-12-04 | 浙江众邦机电科技有限公司 | A kind of industrial sewing machine noise-reduction method, device and equipment based on Operation Conditions |
| CN110459199A (en) * | 2019-08-01 | 2019-11-15 | 固高科技(深圳)有限公司 | The noise-reduction method and engraving machine of engraving machine |
| CN112643722A (en) * | 2020-11-04 | 2021-04-13 | 深圳素士科技股份有限公司 | Shaver head and shaver |
| CN112643722B (en) * | 2020-11-04 | 2022-12-02 | 深圳素士科技股份有限公司 | Shaving head and shaver |
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| CN101261830A (en) | 2008-09-10 |
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