CN106531143A - Coupling feedforward active noise control system - Google Patents
Coupling feedforward active noise control system Download PDFInfo
- Publication number
- CN106531143A CN106531143A CN201611018585.5A CN201611018585A CN106531143A CN 106531143 A CN106531143 A CN 106531143A CN 201611018585 A CN201611018585 A CN 201611018585A CN 106531143 A CN106531143 A CN 106531143A
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- noise
- control system
- signal
- feedforward active
- main frame
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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
-
- 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
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a coupling feedforward active noise control system for suppressing noises in a distribution room. Three of four walls of the distribution room are wall bodies and one wall is a heat-radiation iron gate. Besides, a transformer is installed in the distribution room. The control system comprises a noise monitoring device for collecting a noise signal of the transformer, a noise suppression device for outputting a signal for suppressing transformer noise signal, and a control host connected with the noise monitoring device and the noise suppression device. The noise suppression device and the control host are arranged at one side of the heat-radiation iron gate. The noise suppression device being a mobile device is arranged between the heat-radiation iron gate and the transformer. The control system can be installed simply and conveniently; and no special requirement on the noise source equipment and the operating field is needed. Moreover, compared with noise reduction measures like sound insulation wall installation, the provided control system enables the cost to be lowered.
Description
Technical field
The present invention relates to noise management technique field, and in particular to a kind of coupled feedforward active noise control system.
Background technology
When transformator is due to using certain time limit is reached, causing transformator aging, making a noise, making an uproar produced by transformator
Sound extensively affects the places such as residential quarters, commercial center, station, airport, factories and miness, enterprise, hospital, school.With people's environment
The raising of consciousness and restriction of the environmental administration to each noise like, especially because what the continuous expansion in city and city network were transformed
Demand, some switchgear houses will be built in shopping centre and residential block sometimes, then transformer noise problem just become it is very prominent
.The noise of transformator not only pollutes environment, harm human body health, or even impact equipment and normally runs.Therefore it is right to need
The noise of switchgear house is eliminated.
The content of the invention
It is an object of the invention to provide a kind of coupled feedforward active noise control system, simple installation is set to noise source
Standby and its operation is live without any particular/special requirement, and compared with the noise reduction measures such as installing sound insulation wall, low cost.
In order to achieve the above object, the present invention is achieved through the following technical solutions：A kind of coupled feedforward active noise controlling
System, is characterized in, for the noise suppressed of switchgear house, in the four sides of described switchgear house, three faces are body of wall, are simultaneously radiating
Iron gate, is provided with transformator in described switchgear house, described coupled feedforward active noise control system is used to gather comprising one
The noise monitoring device of transformer noise signal, one is used to export the noise suppression device for suppressing transformer noise signal, also wraps
Containing a control main frame, described control main frame is connected with described noise monitoring device and noise suppression device respectively, wherein, institute
The noise monitoring device and control main frame stated is arranged on the side of radiating iron gate；Described noise suppression device is packaged type,
And it is arranged between described radiating iron gate and transformator.
Described noise monitoring device includes primary microphone and several error microphones, and described primary microphone is leaned on
Nearly described transformator, several described error microphones are evenly distributed on the outside of described transformator.
Described noise suppression device is evenly distributed on the voltage input on the outside of described noise monitoring device comprising several.
The quantity of described voltage input is corresponding with the quantity of described error microphone.
Described coupled feedforward active noise control system also includes integrated amplifier, and described noise monitoring sets
Standby, control main frame is connected with integrated amplifier respectively.
Described coupled feedforward active noise control system also includes an environmental noise monitor, described environmental noise prison
Survey device to be connected with described integrated amplifier.
Described coupled feedforward active noise control system also includes rearmounted power amplifier, and described noise suppressed sets
Standby, control main frame is connected with rearmounted power amplifier respectively.
Described control main frame include being sequentially connected connect initial signal harvester, signal storage, signal phase analysis
Device, secondary signal maker, signal output device, the initial signal harvester are connected with integrated amplifier, the signal
Follower is connected with rearmounted power amplifier.
Described control main frame also includes a human-computer interaction device, and described human-computer interaction device is stored with described signal
Device connects, and instructs for receives input and display noise information.
Described human-computer interaction device is a LCDs.
A kind of coupled feedforward active noise control system of the present invention has advantages below compared with prior art：Small volume,
Lightweight, flexible for installation, noise suppression device installation form is designed as packaged type, and its measurement of audio frequency scope covers human ear institute
The whole frequencies that can be heard, the acoustic pressure scope of monitoring meet the requirement in national clunk management standard；At the beginning of noise monitoring device
Level microphone pick collect to primary noise signal, error microphone error noise signal, environmental noise monitor gather
The environmental noise signal for arriving, is utilized respectively after integrated amplifier amplifies and is sent in control main frame, and control main frame is analyzed
Identification, obtains the noise signal of transformator generation, and is stored, and produces secondary suppression sound-source signal, by secondary suppression
Signal is amplified by rearmounted power amplifier and is exported to voltage input by signal output device, by it is secondary suppress sound-source signal produce with
The sound wave size (amplitude) of initial noise source of students is equal, the acoustic irradiation of opposite in phase, by primary noise sound source to offsetting, above-mentioned
The coupled feedforward active noise control system of structure, can eliminating transformer noise to a great extent, improve near transformator
The living environment of resident, can accurately identify transformer noise, improve the accuracy that the transformer noise of system suppresses.
Description of the drawings
Fig. 1 is a kind of overall structure diagram of coupled feedforward active noise control system of the invention；
Overall structure diagrams of the Fig. 2 for control main frame.
Specific embodiment
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the present invention is further elaborated.
As shown in figure 1, a kind of coupled feedforward active noise control system, for the noise suppressed of switchgear house, described matches somebody with somebody
In the four sides of electric room, three faces are body of wall, be simultaneously the iron gate that radiates, transformator (noise source) is provided with described switchgear house, described
Coupled feedforward active noise control system be used to gathering the noise monitoring device of transformer noise signal comprising one, one be used for it is defeated
Go out to suppress the noise suppression device of transformer noise signal, also comprising a control main frame 100, described control main frame respectively with institute
The noise monitoring device stated and noise suppression device connection, wherein, described noise monitoring device and control main frame 100 are arranged on
The side of radiating iron gate；Described noise suppression device is packaged type, and is arranged on described radiating iron gate and transformator
Between.
In the present embodiment, described noise monitoring device includes primary microphone 201 and several error microphones
202, near described transformator, several described error microphones 202 are evenly distributed on institute to described primary microphone 201
The outside of the transformator stated；It is preferred that microphone is mike.Microphone includes noise transducer, the sound level school being sequentially connected
Quasi- device, signal conditioner, dsp processor, network communication device.
In the present embodiment, described noise suppression device is evenly distributed on described noise monitoring device comprising several
The voltage input 301 in outside, it is preferred that voltage input is speaker；Preferably, the quantity of described voltage input 301 and described mistake
The quantity of difference microphone 202 is corresponding.
In the present embodiment, coupled feedforward active noise control system also includes integrated amplifier 400, and described makes an uproar
Acoustic monitoring equipment, control main frame 100 are connected with integrated amplifier 400 respectively.
In the present embodiment, coupled feedforward active noise control system also includes an environmental noise monitor 500, described
Environmental noise monitor is connected with described integrated amplifier 400.
In the present embodiment, coupled feedforward active noise control system also includes rearmounted power amplifier 600, and described makes an uproar
Sound suppresses equipment, control main frame 100 to be connected with rearmounted power amplifier 600 respectively.
In the present embodiment, described control main frame 100 includes being sequentially connected the initial signal harvester 101, signal for connecing
Memorizer 102, signal phase analyzer 103, secondary signal maker 104, signal output device 105, the initial signal collection
Device 101 is connected with integrated amplifier 400, and the signal output device 105 is connected with rearmounted power amplifier 600；It is preferred that
Described control main frame 100 also includes a human-computer interaction device 106, and described human-computer interaction device 106 is deposited with described signal
Reservoir 102 connects, and instructs for receives input and display noise information；Preferably, described human-computer interaction device 106 is a liquid
Crystal display screen.
The noise that transformator sends belongs to mechanical noise for electromagnetic noise, and it is that alternating magnetic field is produced to iron core and coil
What the vibration that periodicity alternation active force causes was produced, the outside radiated noise of iron core (silicon steel sheet) coil of vibration, its dominant frequency take
Certainly in ac frequency, but as, in energization transformator, under wire, the eddy current effect of core interior, what which radiated makes an uproar
It is complicated more that sound shakes the noise for producing more than single-frequency.
The noise that transformator is produced in switchgear house is mainly by propagating to residential building in the heat sink strip of radiating iron gate.Therefore will make an uproar
Sound suppresses equipment to be arranged on behind radiating iron gate, i.e., between radiating iron gate and transformator, and noise suppression device is
Packaged type, facilitates Utilities Electric Co. personnel that operating repairs are carried out to power equipment, and with store historical data and can show
Show real-time data.
Transformer noise is a kind of sound wave, and the principle suppressed to which is：According to two row sound wave destructive interferences or acoustically radiating
The principle of suppression is penetrated, in the preposition microphone pickup noise signal of upstream arrangement, Jing Electric signal processings are fed to the secondary in downstream
Sound source, adjusts the output (equal in magnitude, opposite in phase) of secondary sound source so that interferes with former noise signal in downstream and slackens, from
And realize the purpose in " dead zone ".The principle controls foundation：Electric signal processing speed is far longer than the speed of acoustic propagation, at the signal of telecommunication
Reason process can realize the control of exactly accurate antiphase acoustic pressure.
The error noise that the primary microphone pick of noise monitoring device is collected to primary noise signal, error microphone
The environmental noise signal that signal, environmental noise monitor are collected, is utilized respectively after integrated amplifier amplifies and is sent to control
In main frame, control main frame is analyzed identification, obtains the noise signal of transformator generation, and is stored, and produces secondary
Suppress sound-source signal, suppress signal to be exported to voltage input by signal output device by the amplification of rearmounted power amplifier by secondary, lead to
Cross secondary suppression sound-source signal and produce, the acoustic irradiation of opposite in phase equal with the sound wave size (amplitude) of initial noise source of students,
By primary noise sound source to offsetting, the coupled feedforward active noise control system of said structure can be eliminated to a great extent
Transformer noise, improves the living environment of resident near transformator, can accurately identify transformer noise, improve the change of system
The accuracy of depressor noise suppression.
Although present disclosure has been made to be discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's
Various modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a kind of coupled feedforward active noise control system, it is characterised in that for the noise suppressed of switchgear house, described distribution
In the four sides of room, three faces are body of wall, be simultaneously the iron gate that radiates, transformator, described coupled feedforward are provided with described switchgear house
Active noise control system is used to gather the noise monitoring device of transformer noise signal comprising one, and one is used to export suppression transformation
The noise suppression device of device noise signal, also comprising a control main frame, described control main frame respectively with described noise monitoring
Equipment and noise suppression device connection, wherein, described noise monitoring device and control main frame are arranged on the side of radiating iron gate；
Described noise suppression device is packaged type, and is arranged between described radiating iron gate and transformator.
2. coupled feedforward active noise control system as claimed in claim 1, it is characterised in that described noise monitoring device
Comprising primary microphone and several error microphones, near described transformator, described is some for described primary microphone
Individual error microphone is evenly distributed on the outside of described transformator.
3. coupled feedforward active noise control system as claimed in claim 2, it is characterised in that described noise suppression device
The voltage input on the outside of described noise monitoring device is evenly distributed on comprising several.
4. coupled feedforward active noise control system as claimed in claim 3, it is characterised in that the quantity of described voltage input
It is corresponding with the quantity of described error microphone.
5. coupled feedforward active noise control system as claimed in claim 1, it is characterised in that further comprising topping power
Amplifier, described noise monitoring device, control main frame are connected with integrated amplifier respectively.
6. coupled feedforward active noise control system as claimed in claim 5, it is characterised in that further make an uproar comprising an environment
Sound monitor, described environmental noise monitor are connected with described integrated amplifier.
7. coupled feedforward active noise control system as claimed in claim 1, it is characterised in that further include rearmounted power
Amplifier, described noise suppression device, control main frame are connected with rearmounted power amplifier respectively.
8. coupled feedforward active noise control system as claimed in claim 1, it is characterised in that described control main frame includes
Be sequentially connected connect initial signal harvester, signal storage, signal phase analyzer, secondary signal maker, signal output
Device, the initial signal harvester are connected with integrated amplifier, and the signal output device is connected with rearmounted power amplifier.
9. coupled feedforward active noise control system as claimed in claim 8, it is characterised in that described control main frame is also wrapped
Containing a human-computer interaction device, described human-computer interaction device is connected with described signal storage, for receives input instruct and
Display noise information.
10. coupled feedforward active noise control system as claimed in claim 9, it is characterised in that described man-machine interaction dress
It is set to a LCDs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611018585.5A CN106531143A (en) | 2016-11-18 | 2016-11-18 | Coupling feedforward active noise control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611018585.5A CN106531143A (en) | 2016-11-18 | 2016-11-18 | Coupling feedforward active noise control system |
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| CN106531143A true CN106531143A (en) | 2017-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611018585.5A Pending CN106531143A (en) | 2016-11-18 | 2016-11-18 | Coupling feedforward active noise control system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109974799A (en) * | 2019-04-19 | 2019-07-05 | 合肥工业大学 | A kind of self-adaptive electromagnetic flowmeter polarization noise bucking-out system based on feedforward control |
| CN112259068A (en) * | 2020-10-21 | 2021-01-22 | 上海协格空调工程有限公司 | Active noise reduction air conditioning system and noise reduction control method thereof |
| CN113539226A (en) * | 2021-06-02 | 2021-10-22 | 国网河北省电力有限公司电力科学研究院 | Active noise reduction control method for transformer substation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1199925A (en) * | 1966-09-08 | 1970-07-22 | Midland Transformer Company Lt | Improvements in or relating to Noise Reduction |
| JP2003045726A (en) * | 2001-08-02 | 2003-02-14 | Toshiba Corp | Transformer |
| CN105551767A (en) * | 2016-03-01 | 2016-05-04 | 江苏方天电力技术有限公司 | Ventilating and noise-reducing apparatus for indoor transformer |
| CN205248083U (en) * | 2015-11-26 | 2016-05-18 | 上海霍亨环保科技有限公司 | Transformer active noise reduction system |
| CN205248082U (en) * | 2015-11-26 | 2016-05-18 | 上海霍亨环保科技有限公司 | Transformer noise reduction system |
-
2016
- 2016-11-18 CN CN201611018585.5A patent/CN106531143A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1199925A (en) * | 1966-09-08 | 1970-07-22 | Midland Transformer Company Lt | Improvements in or relating to Noise Reduction |
| JP2003045726A (en) * | 2001-08-02 | 2003-02-14 | Toshiba Corp | Transformer |
| CN205248083U (en) * | 2015-11-26 | 2016-05-18 | 上海霍亨环保科技有限公司 | Transformer active noise reduction system |
| CN205248082U (en) * | 2015-11-26 | 2016-05-18 | 上海霍亨环保科技有限公司 | Transformer noise reduction system |
| CN105551767A (en) * | 2016-03-01 | 2016-05-04 | 江苏方天电力技术有限公司 | Ventilating and noise-reducing apparatus for indoor transformer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109974799A (en) * | 2019-04-19 | 2019-07-05 | 合肥工业大学 | A kind of self-adaptive electromagnetic flowmeter polarization noise bucking-out system based on feedforward control |
| CN112259068A (en) * | 2020-10-21 | 2021-01-22 | 上海协格空调工程有限公司 | Active noise reduction air conditioning system and noise reduction control method thereof |
| CN113539226A (en) * | 2021-06-02 | 2021-10-22 | 国网河北省电力有限公司电力科学研究院 | Active noise reduction control method for transformer substation |
| CN113539226B (en) * | 2021-06-02 | 2022-08-02 | 国网河北省电力有限公司电力科学研究院 | Active noise reduction control method for transformer substation |
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Application publication date: 20170322 |