CN209045162U - Noise impedance test macro in a kind of airflow line - Google Patents
Noise impedance test macro in a kind of airflow line Download PDFInfo
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- CN209045162U CN209045162U CN201821593764.6U CN201821593764U CN209045162U CN 209045162 U CN209045162 U CN 209045162U CN 201821593764 U CN201821593764 U CN 201821593764U CN 209045162 U CN209045162 U CN 209045162U
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- noise
- test macro
- airflow line
- blower
- terminal pad
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Abstract
Noise impedance test macro in a kind of airflow line, including connected pipeline test macro and regulating device, the pipeline test macro includes the blower being sequentially communicated, silencer box, noise source generation system, testing tube and noise elimination terminal, the regulating device includes frequency converter, noise adjuster, noise controlled speaker, sound quality adjusting loudspeaker and microphone, and the frequency converter, noise controlled speaker, sound quality adjust loudspeaker, microphone is connected with noise adjuster respectively；The utility model is according to the principle of opposite in phase active de-noising, realize active noise controlling, and timely and effectively the error of active noise controlling algorithm is modified, so that the noise that test macro is finally discharged has obtained effective processing, reduce the influence to ambient enviroment.
Description
Technical field
The utility model belongs to noise control in duct technical field, more specifically to noise in a kind of airflow line
Active control test macro.
Background technique
Automobile engine air inlet system and exhaust system, air conditioning for automobiles and domestic air conditioning air outlet etc. can often use pipe-line system, these
Noise will have a direct impact on health of people, or even can cause disease.Huge expansion cavity, perforation are usually used in the past to pipe-line system
The structures such as plate, perforated pipe, resonant cavity, insertion tube or thick sound-absorbing material carry out passive reduction noise processed, and advocate at present
Lightweight contradict.
In addition, in existing pipeline active control technology, there is that published application No. is CN201810239630.2 patents
A kind of duct noise active control device and method, using active noise controlling method, according to two sound wave destructive interferences
Or the principle of Reduction of acoustic radiation, analysis conduit noise signal, calculate control signal in real time makes it in pipeline control to execution unit
It generates secondary sound at system point to be superimposed with duct noise, to achieve the purpose that reduce exhaust noise.But the device or method have ignored
Working condition existing for air-flow, often there is air-flow in pipe-line system noise problem, and do not consider pipe-line system sound quality problem.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of gas flow tubes to solve above-mentioned the deficiencies in the prior art
Noise impedance test macro in road, it is contemplated that flow conditions and sound quality, easy to operate intelligence are simple and compact for structure.
To achieve the above object, the technical scheme adopted by the utility model is
Noise impedance test macro in a kind of airflow line, including connected pipeline test macro and regulating device,
The pipeline test macro includes the blower being sequentially communicated, silencer box, noise source generation system, testing tube and noise elimination terminal, institute
Stating regulating device includes that frequency converter, noise adjuster, noise controlled speaker, sound quality adjust loudspeaker and microphone, described
Frequency converter, noise controlled speaker, sound quality adjust loudspeaker, microphone is connected with noise adjuster respectively；
The frequency converter is set on the blower, and the blower is connected to the silencer box, silencer box by the first terminal pad
It is connected by the second terminal pad with noise source generation system, the noise source generation system passes through third terminal pad and testing tube
It is connected, noise controlled speaker, sound quality adjusting loudspeaker is respectively set in the testing tube, testing tube passes through the 4th connection
Disk is connected to the noise elimination terminal, and in a setting microphone close to noise elimination terminal in testing tube, the blower is made an uproar
Sound source generation system is connect with noise adjuster respectively.
Further, first terminal pad, the second terminal pad, third terminal pad, the 4th terminal pad are all made of flexible connect
It connects.
Further, the blower is roots blower or common blower.
Further, the silencer box is the noise elimination structure of resistance noise reduction or reactive muffling or impedance composite.
Further, the noise elimination terminal is the noise elimination structure of resistance noise reduction or reactive muffling or impedance composite.
Further, the noise source generation system includes multiple equally distributed loudspeakers, multiple loudspeakers
It is connect with the noise adjuster.
Further, the pipeline section of the testing tube is round or quadrangle or other shapes.
Further, the frequency converter is the chip with variable frequency adjustment function.
The beneficial effects of the utility model are:
Noise impedance test macro in a kind of airflow line of the invention, on the one hand may be implemented to pipeline interior air-flow
On the other hand the control of condition for having the case where air-flow in pipeline, can need to carry out according to user the automatic adjustment of noise
And active control obtains excellent in addition, sound quality in pipeline is adjusted while to noise impedance and test
Sound quality, whole control effect is good, accurate, quickly, more intelligent, automation；The present invention actively disappears according to opposite in phase
The principle made an uproar is realized active noise controlling, and is timely and effectively modified to the error of active noise controlling algorithm, so that surveying
The noise that test system finally discharges has obtained effective processing, reduces the influence to ambient enviroment.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the utility model；
Marked in the figure: 1, blower, the 2, first terminal pad, 3, silencer box, the 4, second terminal pad, 5, noise source generation system,
6, third terminal pad, 7, testing tube, the 8, the 4th terminal pad, 9, noise elimination terminal, 10, frequency converter, 11, sound quality database, 12, make an uproar
Sound adjuster, 13, noise controlled speaker, 14, sound quality adjusting loudspeaker, 15, microphone.
Specific embodiment
Specific embodiment is given below, the technical solution of the utility model is made further clear, complete, in detail
It is bright.The present embodiment is the most preferred embodiment premised on technical solutions of the utility model, but the protection scope of the utility model is not
It is limited to following embodiments.
As shown in Figure 1, noise impedance test macro in a kind of airflow line, including connected pipeline test macro and
Regulating device, the pipeline test macro include the blower 1 being sequentially communicated, silencer box 3, noise source generation system 5, testing tube 7
With noise elimination terminal 9, the regulating device includes frequency converter 10, noise adjuster 12, noise controlled speaker 13, sound quality adjusting
Loudspeaker 14 and microphone 15, the frequency converter 10, noise controlled speaker 13, sound quality adjust loudspeaker 14, microphone 15
It is connected respectively with noise adjuster 12；
The frequency converter 10 is set on the blower 1, the blower 1 is connected to the silencer box 3 by the first terminal pad 2,
Silencer box 3 is connected by the second terminal pad 4 with noise source generation system 5, and the noise source generation system 5 is connected by third
Disk 6 is connected with testing tube 7, and noise controlled speaker 13, sound quality adjusting loudspeaker 14 are respectively set in the testing tube 7,
Testing tube 7 is connected to the noise elimination terminal 9 by the 4th terminal pad 8, sets in testing tube 7 at one of close noise elimination terminal 9
The microphone 15 is set, the blower 1, noise source generation system 5 are connect with noise adjuster 12 respectively.
Further, the frequency converter 10 is the chip with variable frequency adjustment function.Further, the frequency converter 10
It can be the frequency converter of finished product.
Further, the blower 1 is roots blower or common blower.
Further, the noise source generation system 5 includes multiple equally distributed loudspeakers, multiple loudspeakers
It is connect with the noise adjuster 12.Further, in the present embodiment, the loudspeaker in the noise source generation system 5 can
Think a pair of of loudspeaker or so or up and down arrangement, is also possible to four or more equally distributed loudspeakers.
Further, the pipeline section of the testing tube 7 is round or quadrangle or other shapes.
Further, the silencer box 3 is the noise elimination structure of resistance noise reduction or reactive muffling or impedance composite, silencer box
3 can reduce fan noise, to generate noiseless air-flow.
Further, the noise elimination terminal 9 is the noise elimination structure of resistance noise reduction or reactive muffling or impedance composite.It eliminates the noise
The noise that terminal 9 discharges the pipeline test macro carries out noise elimination processing, reduces the influence to ambient enviroment.
Further, first terminal pad 2, the second terminal pad 4, third terminal pad 6, the 4th terminal pad 8 are all made of soft
Property connection, it is possible to reduce from the vibration of blower 1 and noise source generation system 5.
Further, noise adjuster 12 is by coordinating noise source generation system 5, noise controlled speaker 13, sound quality
Loudspeaker 14, sound quality database 11, microphone 15 are adjusted, the active control of Lai Shixian noise obtains excellent sound quality；It makes an uproar
Sound adjuster 12 is by adjusting frequency converter 10, blower 1, to realize the control to flow conditions.
The workflow of the utility model the following steps are included:
The noise adjuster 12 controls the opening and closing of the blower 1, and the noise adjuster 12 controls frequency converter
10, and then adjust the air-flow that blower 1 generates different air velocities；The silencer box 3 carries out noise elimination processing to air-flow；The noise
Adjuster 12 controls the noise source generation system 5 and generates known controllable noise source；According to the original of opposite in phase active de-noising
Reason, the noise adjuster 12, which passes through, adjusts the noise controlled speaker 13, and then according to active noise controlling algorithm to survey
Test tube 7 carries out noise impedance in pipeline；The sound quality adjusts loudspeaker 14 and calls sound quality by noise adjuster 12
Database 11, and then sound quality in the pipeline test macro pipeline is adjusted；The noise adjuster 12 controls described
Microphone 15, and then the error of active noise controlling algorithm is modified；The noise elimination terminal 9 is to the pipeline test macro
The noise of discharge carries out noise elimination processing.
In conclusion noise impedance test macro in a kind of airflow line of the invention, on the one hand may be implemented pair
On the other hand the control of pipeline interior air-flow condition for having the case where air-flow in pipeline, can need to carry out noise according to user
Automatic adjustment and active control, in addition, to noise impedance and test while, sound quality in pipeline is adjusted
Section, obtains excellent sound quality, and whole control effect is good, accurate, quick, more intelligent, automation；The present invention is according to phase
The principle of opposite active de-noising, realizes active noise controlling, and timely and effectively carries out to the error of active noise controlling algorithm
Amendment reduces the influence to ambient enviroment so that the noise that test macro is finally discharged has obtained effective processing.
The advantages of main feature, basic principle and the utility model of the utility model has been shown and described above.This
Industry technology personnel are described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
There can be various changes and modifications according to the actual situation, these changes and improvements both fall within the scope of the claimed invention
It is interior.The protection scope of the present invention is defined by the appended claims and their equivalents.
Claims (8)
1. noise impedance test macro in a kind of airflow line, it is characterised in that: including connected pipeline test macro and
Regulating device, the pipeline test macro include the blower (1) being sequentially communicated, silencer box (3), noise source generation system (5), survey
Test tube (7) and noise elimination terminal (9), the regulating device include frequency converter (10), noise adjuster (12), noise controlled speaker
(13), sound quality adjusts loudspeaker (14) and microphone (15), the frequency converter (10), noise controlled speaker (13), sound product
Matter adjusts loudspeaker (14), microphone (15) is connected with noise adjuster (12) respectively；
It is arranged the frequency converter (10) on the blower (1), the blower (1) is connected to the noise elimination by the first terminal pad (2)
Case (3), silencer box (3) are connected by the second terminal pad (4) with noise source generation system (5), the noise source generation system
(5) it is connected by third terminal pad (6) with testing tube (7), noise controlled speaker is respectively set in the testing tube (7)
(13), sound quality adjusts loudspeaker (14), and testing tube (7) is connected to the noise elimination terminal (9) by the 4th terminal pad (8), is located at
In a setting microphone (15) close to noise elimination terminal (9) in testing tube (7), the blower (1), noise source generate system
System (5) is connect with noise adjuster (12) respectively.
2. noise impedance test macro in a kind of airflow line according to claim 1, it is characterised in that: described
One terminal pad (2), the second terminal pad (4), third terminal pad (6), the 4th terminal pad (8) are all made of flexible connection.
3. noise impedance test macro in a kind of airflow line according to claim 1, it is characterised in that: the wind
Machine (1) is roots blower or common blower.
4. noise impedance test macro in a kind of airflow line according to claim 1, it is characterised in that: described to disappear
Sound case (3) is the noise elimination structure of resistance noise reduction or reactive muffling or impedance composite.
5. noise impedance test macro in a kind of airflow line according to claim 1, it is characterised in that: described to disappear
Acoustical terminal (9) is the noise elimination structure of resistance noise reduction or reactive muffling or impedance composite.
6. noise impedance test macro in a kind of airflow line according to claim 1, it is characterised in that: described to make an uproar
Sound source generation system (5) includes multiple equally distributed loudspeakers, multiple loudspeakers with the noise adjuster
(12) it connects.
7. noise impedance test macro in a kind of airflow line according to claim 1, it is characterised in that: the survey
The pipeline section of test tube (7) is round or quadrangle.
8. noise impedance test macro in a kind of airflow line according to claim 1, it is characterised in that: the change
Frequency device (10) is the chip with variable frequency adjustment function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821593764.6U CN209045162U (en) | 2018-09-28 | 2018-09-28 | Noise impedance test macro in a kind of airflow line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821593764.6U CN209045162U (en) | 2018-09-28 | 2018-09-28 | Noise impedance test macro in a kind of airflow line |
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| Publication Number | Publication Date |
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| CN209045162U true CN209045162U (en) | 2019-06-28 |
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ID=67034588
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109448690A (en) * | 2018-09-28 | 2019-03-08 | 天津职业技术师范大学 | Noise impedance test macro and test method in a kind of airflow line |
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2018
- 2018-09-28 CN CN201821593764.6U patent/CN209045162U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109448690A (en) * | 2018-09-28 | 2019-03-08 | 天津职业技术师范大学 | Noise impedance test macro and test method in a kind of airflow line |
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