CN204760211U - Power transformer active noise reduction system - Google Patents
Power transformer active noise reduction system Download PDFInfo
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- CN204760211U CN204760211U CN201520443497.4U CN201520443497U CN204760211U CN 204760211 U CN204760211 U CN 204760211U CN 201520443497 U CN201520443497 U CN 201520443497U CN 204760211 U CN204760211 U CN 204760211U
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- active noise
- amplifier
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- 230000009467 reduction Effects 0.000 title claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 238000013481 data capture Methods 0.000 claims description 3
- 238000013500 data storage Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000003321 amplification Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 2
- 238000013480 data collection Methods 0.000 abstract 3
- 238000004458 analytical method Methods 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model discloses a power transformer active noise reduction system, include: the microphone, the microphone is connected with leading power amplifier, leading power amplifier and data collection card's collection path connection, data collection card carries out sending to the controller to data after AD changes, the output of controller passes through data collection card's the rearmounted power amplifier of output channel connection, the audio amplifier is connected to rearmounted power amplifier's output. Gather elementary noise through the reference signal microphone, in sending the signal to controller after power amplification and the AD conversion, the controller is accomplished noise signal's analysis processes, data storage and is produced control signal, passes through output signal the DA conversion and enlarge the back by audio amplifier output, can gather the secondary sound source that the audio amplifier produced through the error signal microphone to the controller is fed back to, the noise reduction effect well can be reached through feedback control like this.
Description
Technical field
The utility model relates to transformer noise processing technology field, particularly relates to a kind of active noise reduction of power transformer system.
Background technology
Transformer noise is by body construction design, type selecting layout, installation, use procedure, the machinery noise that is irregular, that cause intermittently, continuously or at random that transformer body and cooling system produce and airborne noise summation.The noise that transformer produces extensively affects the place such as residential quarters, commercial center, light station, airport, factories and miness, enterprise, hospital, school.Along with the raising of people's environmental consciousness and environmental administration are to the restriction of each noise like, particularly due to the continuous expansion in city and the demand of city network transformation, some transformer stations will be built in shopping centre and residential block sometimes, so transformer noise problem is with regard to extremely highlighting of becoming.The noise not only contaminated environment of transformer, harm humans is healthy, and the equipment that affects normally runs, and closely related with the floor space of transformer station.Be necessary the system that a kind of transformer noise reduction process is provided, just can meet the requirement of user to noise,
Utility model content
The purpose of this utility model is exactly to solve the problem, provide a kind of active noise reduction of power transformer system, utilize data collecting module collected primary noise signal and error signal, and the Data Source of control is provided to controller after completing A/D conversion, sent by passive loudspeaker box after the adaptive control of controller, so just primary noise signal is carried out effective reduction, decrease the impact on environment.
To achieve these goals, the utility model adopts following technical scheme:
Active noise reduction of power transformer system, comprise: microphone, described microphone is connected with integrated amplifier, described integrated amplifier is connected with the acquisition channel of data collecting card, described data collecting card sends controller to after carrying out A/D conversion to data, the output of described controller connects rearmounted power amplifier by the output channel of data collecting card, and the output of described rearmounted power amplifier connects audio amplifier.
Described microphone comprises the reference signal microphone gathering elementary sound source and the error signal microphone gathering secondary sound source.
Described audio amplifier is passive loudspeaker box.
Described integrated amplifier is by being connected to the cable connection data capture card of bnc connector.
Described microphone is condenser microphone.
The output of described controller is also connected with warning lamp, display screen and gsm module.
The output of described integrated amplifier is also connected with sound level calibrator.
The beneficial effects of the utility model are:
The utility model by reference to signal microphone pick to primary noise, after power amplification and A/D conversion, signal is delivered in controller, controller completes analyzing and processing, the data storage of noise signal and produces control signal, output signal is changed by D/A and is exported by audio amplifier after amplifying, the secondary sound source of audio amplifier generation can be gathered by error signal microphone, and feed back to controller, noise reduction well can be reached by FEEDBACK CONTROL like this.Sound level calibrator can be calibrated the sensitivity of system, improves the accuracy of system.
The utility model is connected with caution device simultaneously, when the noise signal exported continues to exceed certain value, the effect of warning can be reached by the flicker of warning lamp, remind passing personnel away from here, note can also be sent to relevant administrative staff by gsm module simultaneously, remind related management personnel to carry out maintenance and inspection to equipment.Current noise size can be shown in real time by display screen, facilitate technical staff to check.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment:
Below in conjunction with accompanying drawing and embodiment, the utility model is described further:
As shown in Figure 1, active noise reduction of power transformer system, comprise: microphone, described microphone is connected with integrated amplifier, described integrated amplifier connects the acquisition channel with the data collecting card of analog input, described data collecting card sends controller to after carrying out A/D conversion to data, and the output of described controller connects rearmounted power amplifier by the output channel of data collecting card, and the output of described rearmounted power amplifier connects audio amplifier.
The PCI-4461 high-performance dynamic signal acquisition card that data collecting card adopts National Instruments to produce, it has the synchronized sampling analog channel of two 24, can be used as the input of primary signal and error signal, and the sample rate up to 204.8kS/s can be provided at high resolutions, can accurately reflect power transformer noise information.This capture card can also provide ± output voltage of 10V, and as the operating voltage of preamplifier.PCI-4461 capture card also has two-way analog output channel simultaneously, can as the output of secondary signal.
Described microphone is condenser microphone.Described microphone comprises the reference signal microphone gathering elementary sound source and the error signal microphone gathering secondary sound source.Microphone is a kind of senser sound physical quantity being converted to the signal of telecommunication.The AWA14423 type testing capacitor microphone selecting Aiwa's instrument to produce in the present embodiment, it can produce an alternating voltage signal be directly proportional to sound wave.
Described audio amplifier is passive loudspeaker box.Adopt CS-410 type passive loudspeaker box, its input impedance is 8, and input power is 200W, and reference frequency output 40 ~ 18kHz has good low frequency characteristic, and can send the maximum acoustic of 109dB continuously, meets the requirement of system to secondary sound source completely.
Described integrated amplifier is by being connected to the cable connection data capture card of bnc connector.In the present embodiment, integrated amplifier selects this type preamplifier input impedance of AWA14604 type preamplifier very large, can ensure the accuracy of condenser microphone.Have the advantages that frequency response range is large, operating temperature range is wide, can be connected with testing capacitor microphone easily by screw thread, and signal is decayed slowly in the cable, be adapted at using in all kinds of environment.
The output of described controller is also connected with warning lamp, display screen and gsm module.When the noise signal exported continues to exceed certain value, the effect of warning can be reached by the flicker of warning lamp, remind passing personnel away from here, note can also be sent to relevant administrative staff by gsm module simultaneously, remind related management personnel to carry out maintenance and inspection to equipment.Current noise size can be shown in real time by display screen, facilitate technical staff to check.
The output of integrated amplifier is also connected with sound level calibrator.Because testing capacitor microphone can slightly difference when producing, and the signal of preamplifier also has certain decay when transmitting, and therefore needs to calibrate its sensitivity.Use AWA6221A type sound level calibrator to calibrate harvester in the present embodiment, during calibration, test capacitors can receive a voice signal, if be 94dB at 1000Hz place, calibrates successfully.
HS-8200KA II type power amplifier selected by rearmounted power amplifier, and this power amplifier with the load of 4 or 8, can have the power output of 300W and 200W respectively, and frequency response range is 20 ~ 20kHz, meets the requirement of native system completely.
Reference signal microphone and preamplifier by being threaded, before must power transformer being placed in.Its transformer noise signal gathered carries out A/D conversion by BNC cable transmission to data collecting card.Data collecting card is connected with controller, and controller can be placed in Central Control Room, completes the analyzing and processing of noise signal, data storage and produces the work such as control signal.Control signal delivers to signal output system after data collecting card D/A changes, and signal output system then can be placed in the region needing noise reduction, sends secondary noise realize active noise reduction according to control signal.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection range; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection range of the present utility model.
Claims (7)
1. active noise reduction of power transformer system, it is characterized in that, comprise: microphone, described microphone is connected with integrated amplifier, described integrated amplifier is connected with the acquisition channel of data collecting card, described data collecting card sends controller to after carrying out A/D conversion to data, and the output of described controller connects rearmounted power amplifier by the output channel of data collecting card, and the output of described rearmounted power amplifier connects audio amplifier.
2. active noise reduction of power transformer system as claimed in claim 1, is characterized in that, described microphone comprises the reference signal microphone gathering elementary sound source and the error signal microphone gathering secondary sound source.
3. active noise reduction of power transformer system as claimed in claim 1, it is characterized in that, described audio amplifier is passive loudspeaker box.
4. active noise reduction of power transformer system as claimed in claim 1, it is characterized in that, described integrated amplifier is by being connected to the cable connection data capture card of bnc connector.
5. active noise reduction of power transformer system as claimed in claim 1, it is characterized in that, described microphone is condenser microphone.
6. active noise reduction of power transformer system as claimed in claim 1, it is characterized in that, the output of described controller is also connected with warning lamp, display screen and gsm module.
7. active noise reduction of power transformer system as claimed in claim 1, it is characterized in that, the output of described integrated amplifier is also connected with sound level calibrator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520443497.4U CN204760211U (en) | 2015-06-25 | 2015-06-25 | Power transformer active noise reduction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520443497.4U CN204760211U (en) | 2015-06-25 | 2015-06-25 | Power transformer active noise reduction system |
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| Publication Number | Publication Date |
|---|---|
| CN204760211U true CN204760211U (en) | 2015-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520443497.4U Expired - Fee Related CN204760211U (en) | 2015-06-25 | 2015-06-25 | Power transformer active noise reduction system |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413251A (en) * | 2018-02-07 | 2018-08-17 | 广州莱仑特种装备有限公司 | A kind of self feed back denoising device for pipe network natural gas pressure regulating |
-
2015
- 2015-06-25 CN CN201520443497.4U patent/CN204760211U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108413251A (en) * | 2018-02-07 | 2018-08-17 | 广州莱仑特种装备有限公司 | A kind of self feed back denoising device for pipe network natural gas pressure regulating |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151111 Termination date: 20180625 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |