CN103344326B - Acoustical power testing jig - Google Patents
Acoustical power testing jig Download PDFInfo
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- CN103344326B CN103344326B CN201310270620.2A CN201310270620A CN103344326B CN 103344326 B CN103344326 B CN 103344326B CN 201310270620 A CN201310270620 A CN 201310270620A CN 103344326 B CN103344326 B CN 103344326B
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- acoustical power
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- testing jig
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Abstract
Present invention is disclosed a kind of acoustical power testing jig, it includes：Plane reticular framework；Test device locating rack, is movably connected on the plane reticular framework, to install fixed test device.The acoustical power testing jig bearing capacity is strong, improve the stability that the layout of acoustical power test measuring point is set up, will not deform phenomenon in acoustical power test process, test point will not deviation post, test position fix accurate stable, and it is simple in construction, it is easy for installation, and it is smaller to acoustic environmental impact, further increase the accuracy of acoustical power test.
Description
Technical field
The present invention relates to acoustical testing technical field, and more particularly to a kind of acoustical power testing jig.
Background technology
The test of acoustical power is widely used in automobile, Aero-Space, household electrical appliance, computer and communication, industrial products etc.
Every field, to carry out noise testing and acoustics characteristic test to product.A kind of relatively conventional acoustical power method of testing is certainly
By field method, i.e., sound source is placed in semi-free field（Semianechoic room）In, test on the hemisphere face centered on sound source or other tools
There is the sound pressure level of some well-distributed pointses on the test surfaces of certain symmetry, and then try to achieve acoustic power level.
The form of acoustic current power test frame is mostly arc support guide rail composition, but utilizes the test of existing acoustical power
Frame carries out acoustical power test and had the disadvantage that：
1. according to the difference of sound source size to be measured, the size of required acoustical power testing jig is also just different.Due to support
The curved appearance limitation of guide rail, when testing large-size sound source, it is necessary to using size than larger acoustical power testing jig, but
It is due to Action of Gravity Field, oversized acoustical power testing jig is because the gravity of itself is plus the weight of acoustical power test device
Deformation is produced, causes the position of acoustical power test point to shift, the accuracy of test position fix is influenceed.
2. also due to the curved appearance of arc support guide rail is limited, during its integral cutting is molded, to processing
The requirement of precision is higher, and required board dimension is larger, and the waste of surplus material can be caused after cutting, this adds increased
The manufacture difficulty and manufacturing cost of acoustical power testing jig.
3. for large-sized acoustical power frame, the material section product of supporting structure be also required to it is relatively large, to acoustic environment
Influence also can mutually strain big
The content of the invention
In view of this, it is an object of the invention to provide a kind of acoustical power testing jig, to solve sound work(in the prior art
Rate testing jig influences big to sound field, the technical problem such as bearing capacity is small, stability is poor, manufacturing cost is high.
The acoustical power testing jig that the present invention is provided, it includes：Plane reticular framework；Test device locating rack, is flexibly connected
In on the plane reticular framework, to install fixed test device.
Further, the plane reticular framework is spliced by multiple perforated plate bending parts.
Further, the plane reticular framework is polygon network structure or circular network structure.
In summary, the acoustical power testing jig that the present invention is provided uses lifting mode, and bearing capacity is strong, improves acoustical power test
The stability that the layout of measuring point is set up, will not cave in phenomenon in sound power test process, and position will not occur for test point
Skew, test position fix accurate stable, and simple in construction, easy installation and removal are put, and it is smaller to acoustic environmental impact, further
Improve the accuracy of acoustical power test.It is mostly fixed dimension for existing acoustical power testing jig, testing radius is immutable,
Point position is fixed, the present invention can compatible two kinds of different radiis simultaneously acoustical power testing jig, for needing to carry out different radii
Test provides convenient.
Brief description of the drawings
Fig. 1 show the structural representation of acoustical power testing jig in the prior art；
Fig. 2 show the structural representation of the acoustical power testing jig of one embodiment of the invention offer；
Fig. 3 show the side view of the acoustical power testing jig of one embodiment of the invention offer.
Embodiment
Fig. 1 is referred to, it show the structural representation of acoustical power testing jig in the prior art.
As shown in figure 1, acoustical power testing jig 100 includes multiple arcs support guide 110, and the multiple arc support is led
One end of rail 110 links together, and overall is in part ball-type.When being tested using the acoustical power testing jig 100, acoustical power is surveyed
Examination frame 100 is placed on the ground of semianechoic room, by acoustical power test device such as：Microphone, is fixed on the arc branch of Part-spherical
Tested on frame guide rail 110.
Existing acoustical power testing jig is in the larger sound source of test size, and its own is also sized to corresponding expansion, and then
Cause acoustical power testing jig 100 because the weight of itself and the weight of test device cause acoustical power testing jig 100 to produce overall change
Shape, in turn results in the skew of test device anchor point, and then have impact on the degree of accuracy and the stability of test.Further, since existing
Some acoustical power testing jigs 100 need to carry out integral cutting shaping in processing and fabricating, and the phenomenon of waste of material is serious, causes system
Cause this higher.
And it is of the invention on the basis of in view of problem above, employing plane mesh structure designs, and cooperation activity
Test device locating rack, sound source to be measured is tested in test using lifting mode, so as to avoid in test large-size sound source
When, because own wt and test device weight cause the situation that acoustical power testing jig is deformed, it is ensured that the accuracy of test position fix
And stability.
To become apparent the purpose of the present invention, feature, the embodiment to the present invention is made below in conjunction with the accompanying drawings
Further instruction.
Refer to Fig. 2 and combine referring to Fig. 3, it show the structure of the acoustical power testing jig of one embodiment of the invention offer
Schematic diagram.
Acoustical power testing jig 200, it includes：Plane reticular framework 210 and test device locating rack 220, test device is fixed
Position frame 220 is movably connected on the plane reticular framework 210, to install fixed test device.
Employ plane mesh structure design, and coordinate the convenient test device locating rack dismantled, in test, only need by
The lifting of acoustical power testing jig 200 is erected on sound source to be measured, so that when testing large-size sound source, one side acoustical power is surveyed
The examination own dimensions of frame 200 need not accordingly expand with sound source to be measured, the problem of entering without deforming, on the other hand, even if
Under special circumstances, it is necessary to acoustical power testing jig 200 increase size when, due to its plane reticular design, the test of cooperation activity
Device locating rack, and using lifting test mode, therefore avoid the generation of acoustical power testing jig overall deformation.
Therefore, can be avoided in above-mentioned two situations using acoustical power testing jig provided in an embodiment of the present invention because
Own wt and test device weight cause the situation that acoustical power testing jig is deformed, it is ensured that the accuracy of test position fix and stably
Property.
In addition, in the not used time, test device locating rack 220 can be removed, and plane reticular framework 210 can be placed in acoustics
In environment, on acoustic enviroment without influence, easy installation and removal.
In one embodiment of this invention, the plane reticular framework 210 is spliced by multiple perforated plate bending parts.Phase
Than the acoustical power testing jig of the aluminium cutting used in the prior art, its reflection to sound field is small, further reduces and treats
The influence of sound source is surveyed, the accuracy of test is improved.
In one embodiment of this invention, the plane reticular framework 210 is polygon network structure or circular netted knot
Structure.Using network structure, radius variable is measured, the need for meeting different measurement radiuses and measurement standard.But the present invention is not
This is confined to, all planforms that can realize above-mentioned functions are all contained in the scope of the invention.
In summary, the main part of acoustical power testing jig provided in an embodiment of the present invention employs plane mesh structure and set
Meter, and coordinate dismountable test device locating rack, form acoustical power testing jig., can when carrying out acoustical power test to sound source
By the acoustical power testing jig mast-up in the sound source to be measured, acoustical power test is placed in positioning on plane mesh structure framework
Device is tested.Due to coordinating detachable test device locating rack using plane mesh structure, therefore, for large-size sound
During source, the acoustical power testing jig plane mesh structure of itself uses the mounting means of lifting with stronger bearing capacity, complete
It can avoid entirely because of the situation that own wt and test device weight cause acoustical power testing jig to deform, it is ensured that test position fix
Stability and veracity, and the material of the acoustical power testing jig uses low reflection perforated plate, reduce further to acoustical power
The influence of test.
Although the present invention is disclosed above with preferred embodiment, so it is not limited to the present invention, any affiliated technology
Has usually intellectual in field, without departing from the spirit and scope of the present invention, when that can be used for a variety of modifications and variations, therefore
The scope of protection of the present invention is defined by those of the claims.
Claims (3)
1. a kind of acoustical power testing jig, it is characterised in that including：
Plane reticular framework；
Test device locating rack, is movably connected on the plane reticular framework, to install fixed test device；
The test device locating rack is the different connecting rod of multiple length.
2. acoustical power testing jig according to claim 1, it is characterised in that the plane reticular framework is by multiple perforated plates
It is spliced.
3. acoustical power testing jig according to claim 1, it is characterised in that the plane reticular framework is that polygon is netted
Structure or circular network structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310270620.2A CN103344326B (en) | 2013-06-28 | 2013-06-28 | Acoustical power testing jig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310270620.2A CN103344326B (en) | 2013-06-28 | 2013-06-28 | Acoustical power testing jig |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103344326A CN103344326A (en) | 2013-10-09 |
| CN103344326B true CN103344326B (en) | 2017-08-01 |
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ID=49279142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310270620.2A Active CN103344326B (en) | 2013-06-28 | 2013-06-28 | Acoustical power testing jig |
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| Country | Link |
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| CN (1) | CN103344326B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105928615A (en) * | 2016-06-16 | 2016-09-07 | 中国电力科学研究院 | Noise testing device |
| CN106679797B (en) * | 2016-11-16 | 2021-04-23 | 中国电力科学研究院 | Method and device for testing sound insulation quantity of sound insulation cover of shunt reactor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201429462Y (en) * | 2009-02-13 | 2010-03-24 | 北京声望声电技术有限公司 | Sound power measuring stand |
| CN201653538U (en) * | 2010-03-05 | 2010-11-24 | 上海声望声学工程有限公司 | Sound power measuring rack |
| CN203364958U (en) * | 2013-06-28 | 2013-12-25 | 上海声望声学工程有限公司 | Acoustical power testing support |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9132331B2 (en) * | 2010-03-19 | 2015-09-15 | Nike, Inc. | Microphone array and method of use |
-
2013
- 2013-06-28 CN CN201310270620.2A patent/CN103344326B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201429462Y (en) * | 2009-02-13 | 2010-03-24 | 北京声望声电技术有限公司 | Sound power measuring stand |
| CN201653538U (en) * | 2010-03-05 | 2010-11-24 | 上海声望声学工程有限公司 | Sound power measuring rack |
| CN203364958U (en) * | 2013-06-28 | 2013-12-25 | 上海声望声学工程有限公司 | Acoustical power testing support |
Non-Patent Citations (1)
| Title |
|---|
| 基于波束形成缩放声强的声源局部声功率计算;褚志刚等;《声学学报》;20130531;第38卷(第3期);第265-271页 * |
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| Publication number | Publication date |
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| CN103344326A (en) | 2013-10-09 |
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| C06 | Publication | ||
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| CB02 | Change of applicant information |
Address after: 200336, room 607-608, Tian Rui building, 31 Shuangliu Road, Shanghai, Changning District Applicant after: SHANGHAI SWAT ACOUSTICS TECHNOLOGY CO., LTD. Address before: 200335, room 31, 608 Shuangliu Road, Shanghai, Changning District Applicant before: Shanghai Shengwang Acoustics Engineering Co., Ltd. |
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| COR | Change of bibliographic data | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |