CN208333804U - A kind of sonic transducer support device under high speed inlet flow conditions for wind tunnel test - Google Patents
A kind of sonic transducer support device under high speed inlet flow conditions for wind tunnel test Download PDFInfo
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- CN208333804U CN208333804U CN201820773619.XU CN201820773619U CN208333804U CN 208333804 U CN208333804 U CN 208333804U CN 201820773619 U CN201820773619 U CN 201820773619U CN 208333804 U CN208333804 U CN 208333804U
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- microphone
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- wind tunnel
- inlet flow
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Abstract
The utility model discloses the sonic transducer support devices under a kind of high speed inlet flow conditions for wind tunnel test, including main supporting element and microphone fixing piece, including from main supporting element to the integrally formed adapter and double of threaded connector microphone fixing piece；The utility model prevents microphone to be damaged in high-speed flow using microphone nose cone, aerofoil profile strut and special integrated commutation structure using low noise, it is horizontal with the self noise for reducing support device, microphone position and main supporting structure is spaced apart to reduce the influence that main supporting structure sound reflecting measures microphone, with half-thread connector to facilitate the cable of BNC connector to pass through.
Description
Technical field
The invention belongs to wind-tunnel acoustic measurement fields, relate in particular to a kind of high speed inlet flow conditions for wind tunnel test
Under sonic transducer support device.
Background technique
Aeroacoustics measurement needs thus sometimes for the noise signal for using microphone measurement target in High Speed Flow Field
Solve the problems, such as the following:
1) needing to protect microphone that it is avoided to be directly exposed to causes to damage in high-speed flow；
2) support device has extremely low self noise level with not interference measurement in High Speed Flow Field；
3) support device should not influence the measurement of microphone on the sound reflecting of target noise；
4) easily support and the design of microphone pipeline cabling.
Existing acoustic measurement all carries out at low wind speeds, and nearby wind speed is less than 5m/s to usual microphone, need to only pass at this time
Blast cap is installed on sound device；And the design of microphone producer has microphone nose cone under higher wind conditions, but corresponding without providing
Support.Therefore there have been contradictory problems below:
It is straight when the strut for being used to support microphone since microphone BNC connector size is greater than microphone diameter itself
When diameter remains unchanged and is greater than BNC connector size, one side microphone will be not fixed firmly and lean at this time, when high-speed flow impacts
On microphone, microphone can be made to fall off or slide, on the other hand, when the connection diameter of strut is sufficiently large, strut surface
Sound reflecting will affect the measurement of target noise signal, while strut itself can also bring additional noise, influence to measure.
If keeping the diameter of strut moderate, microphone is just fixed, the line on BNC connector can only just be cut,
Then it is welded again after connecting, this technique is obvious to bring new problem again, be not appropriate for test requirements document.
Summary of the invention
The object of the present invention is to provide a kind of new connection structures, have wanted in the case where not changing microphone and support rod
At connection relationship between the two, the above problem, the precision of guarantee test are overcome.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of sonic transducer support device under high speed inlet flow conditions for wind tunnel test, including main supporting element and biography
Sound device fixing piece, including being threadedly coupled from main supporting element to the integrally formed adapter microphone fixing piece and half-and-half
Part.
In the above-mentioned technical solutions, the adapter and double of threaded connector are integrally formed two independently separated
Structure.
In the above-mentioned technical solutions, the adapter is hollow structure, and one end of adapter is another for being inserted into supporting element
End with double of threaded connector for connecting.
In the above-mentioned technical solutions, double of threaded connector is splitted along axisymmetrical as two individual components, institute
It states and is provided with screw thread on the outer surface of double of threaded connector.
In the above-mentioned technical solutions, double of threaded connector is divided into two sections, and the screw thread of rear section surface is used for and switching
Head connection, the screw thread of preceding section surface with microphone fixing piece for connecting.
In the above-mentioned technical solutions, the screw thread of the screw thread of the preceding section surface of double of threaded connector and rear section surface,
Direction of rotation is opposite.
In the above-mentioned technical solutions, BNC connector is provided on the microphone, the cable of BNC connector is by connecting half-thread
Two separated individual components of fitting pass through adapter and main support device after engaging.
In the above-mentioned technical solutions, after main supporting element, adapter, double of threaded connector are connected as one, whole
Contour structures are integrated rectifier structure.
In the above-mentioned technical solutions, double of threaded connector, microphone fixing piece are insulator.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
The present invention can quickly and easily being mounted on BNC cable and microphone under wind tunnel test high speed inlet flow conditions, with
Carry out noise testing.It is also convenient to remove microphone and BNC cable when not used.The present invention prevents from passing using microphone nose cone
Sound device is damaged in high-speed flow, aerofoil profile strut and special integrated commutation structure using low noise, to reduce branch
The self noise of support arrangement is horizontal, and microphone position and main supporting structure is spaced apart to reduce main supporting structure sound reflecting
Influence to microphone measurement, with half-thread connector to facilitate the cable of BNC connector to pass through.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, in which:
Fig. 1 is sonic transducer support device side view in Flow Field in Wind Tunnel；
Fig. 2 is sonic transducer support device top view in Flow Field in Wind Tunnel；
Sonic transducer support device component detail drawing in Fig. 3 Flow Field in Wind Tunnel；
Double of threaded connector of Fig. 4 separates and closes status diagram；
Wherein: 1 is main supporting element, and 2 be adapter, and 3 be double of threaded connector, and 4 be microphone fixing piece, and 5 be screw thread.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
Embodiment one
As shown in Figure 1, being the final structural schematic diagram of this programme, which includes a main supporting elements, are connected to main branch
Adapter in support member, double of the threaded connector and microphone fixing piece being connect with adapter.Wherein main supporting element includes
One pedestal and aerofoil profile strut, the aerofoil profile strut use low noise integrated commutation structure, for reducing in air flow
Itself noise, and pedestal uses disk through-hole structure, to facilitate the fixation of whole device.
For the self-noise of the entire support device of reduction of maximum possible, the adapter of aerofoil profile strut and front end, double
Helicitic texture and microphone fixing piece are using whole integrated commutation structure, as shown in Fig. 2, the exemplary advantage of this structure
Be that the aerofoil profile strut using itself low noise, and again can be stable fix microphone so that the place that microphone is stable
In working condition.
As shown in figure 3, be the core component in this programme, change traditional being directly anchored to support by microphone fixing piece
On part, adapter and double of threaded connector are set as between aerofoil profile strut and microphone fixing piece.This set first
Benefit, which is that, increases the distance between microphone and aerofoil profile strut, and it is anti-for the noise of microphone to can reduce aerofoil profile strut
It penetrates, influences test effect.It, can be stable by microphone fixing piece secondly by the effect of adapter and double of threaded connector
It is not in the problems such as falling off on aerofoil profile strut.
In order to realize fixed function, double of threaded connector is divided into the two halves half-and-half splitted, as described in Figure 4, separated
Two halves can be merged into complete double of threaded connector, and the entirety after closing up is divided into leading portion and back segment, leading portion and back segment
On be respectively arranged with contrary screw thread, be attached for carrying out with other component.
The process for using of structure in this programme are as follows: when needing fixed microphone, because having BNC on microphone fixing piece
Connector and corresponding connection cables are first opened double of connector, by BNC connector and corresponding connection cables from two
It is passed through between double of threaded connector of half block, then closes up double of threaded connector, double of connector one end after closing up
It being threadedly coupled with microphone fixing piece, the cable on BNC connector passes through double of threaded connector, adapter is then passed through,
Adapter is hollow structure, the other end of double of threaded connector is inserted into the middle hollow structure of adapter, by mutual
Screw thread be attached；Then it is passed through in the cable of BNC connector from the cavity in aerofoil profile strut, and one end of adapter is passed through
The mode of threaded connection and the end of aerofoil profile strut are attached.
It is set forth above, because aerofoil profile strut is integrated after being connected as entirety with adapter, double of threaded connector
Rectifier structure design, and the cabling from its hollow inner cavity of the BNC cable on microphone fixing piece, therefore in air flow field
In, self-noise can be reduced to minimum.
For the demand of actual tests, microphone fixing piece is all made of insulating materials with double of threaded connector and is made,
So that two components are insulator, meet the insulation requirements of microphone face.
The invention is not limited to specific embodiments above-mentioned.The present invention, which expands to, any in the present specification to be disclosed
New feature or any new combination, and disclose any new method or process the step of or any new combination.
Claims (9)
1. the sonic transducer support device under a kind of high speed inlet flow conditions for wind tunnel test, including main supporting element and transaudient
Device fixing piece, it is characterised in that including from main supporting element to the integrally formed adapter and double of spiral shell microphone fixing piece
Line connector.
2. the sonic transducer under a kind of high speed inlet flow conditions for wind tunnel test according to claim 1 supports dress
It sets, it is characterised in that the adapter and double of threaded connector are integrally formed two independently separated structures.
3. the sonic transducer under a kind of high speed inlet flow conditions for wind tunnel test according to claim 2 supports dress
It sets, it is characterised in that the adapter is hollow structure, and one end of adapter is used for and double for being inserted into supporting element, the other end
Threaded connector connection.
4. the sonic transducer under a kind of high speed inlet flow conditions for wind tunnel test according to claim 2 supports dress
It sets, it is characterised in that double of threaded connector is splitted along axisymmetrical as two individual components, described to connect to half-thread
Screw thread is provided on the outer surface of fitting.
5. the sonic transducer under a kind of high speed inlet flow conditions for wind tunnel test according to claim 4 supports dress
It sets, it is characterised in that double of threaded connector is divided into two sections, and the screw thread of rear section surface with adapter for connecting, preceding segment table
The screw thread in face with microphone fixing piece for connecting.
6. the sonic transducer under a kind of high speed inlet flow conditions for wind tunnel test according to claim 5 supports dress
It sets, it is characterised in that the screw thread of the preceding section surface of double of threaded connector and the screw thread of rear section surface, direction of rotation are opposite.
7. the sonic transducer under a kind of high speed inlet flow conditions for wind tunnel test according to claim 5 supports dress
Set, it is characterised in that be provided with BNC connector on the microphone, the cable of BNC connector separated by double of threaded connector two
A individual components pass through adapter and main support device after engaging.
8. the sonic transducer branch under a kind of -7 any high speed inlet flow conditions for wind tunnel test according to claim 1
Support arrangement, it is characterised in that after main supporting element, adapter, double of threaded connector are connected as one, whole contour structures
For integrated rectifier structure.
9. the sonic transducer under a kind of high speed inlet flow conditions for wind tunnel test according to claim 1 supports dress
It sets, it is characterised in that double of threaded connector, microphone fixing piece are insulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820773619.XU CN208333804U (en) | 2018-05-23 | 2018-05-23 | A kind of sonic transducer support device under high speed inlet flow conditions for wind tunnel test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820773619.XU CN208333804U (en) | 2018-05-23 | 2018-05-23 | A kind of sonic transducer support device under high speed inlet flow conditions for wind tunnel test |
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| Publication Number | Publication Date |
|---|---|
| CN208333804U true CN208333804U (en) | 2019-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820773619.XU Expired - Fee Related CN208333804U (en) | 2018-05-23 | 2018-05-23 | A kind of sonic transducer support device under high speed inlet flow conditions for wind tunnel test |
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| Country | Link |
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| CN (1) | CN208333804U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320004A (en) * | 2019-08-22 | 2019-10-11 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of support device tested for sonic transducer directive property in wind-tunnel |
| CN110719539A (en) * | 2019-10-23 | 2020-01-21 | 中国航天空气动力技术研究院 | Be applied to microphone support installation adapter of low noise reflection |
| CN110779678A (en) * | 2019-11-07 | 2020-02-11 | 中国航空工业集团公司哈尔滨空气动力研究所 | Test bed capable of synchronously measuring aerodynamic characteristics and acoustic characteristics of large-size propeller |
-
2018
- 2018-05-23 CN CN201820773619.XU patent/CN208333804U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320004A (en) * | 2019-08-22 | 2019-10-11 | 中国空气动力研究与发展中心低速空气动力研究所 | A kind of support device tested for sonic transducer directive property in wind-tunnel |
| CN110320004B (en) * | 2019-08-22 | 2020-11-20 | 中国空气动力研究与发展中心低速空气动力研究所 | Supporting device for directivity test of acoustic microphone in wind tunnel |
| CN110719539A (en) * | 2019-10-23 | 2020-01-21 | 中国航天空气动力技术研究院 | Be applied to microphone support installation adapter of low noise reflection |
| CN110779678A (en) * | 2019-11-07 | 2020-02-11 | 中国航空工业集团公司哈尔滨空气动力研究所 | Test bed capable of synchronously measuring aerodynamic characteristics and acoustic characteristics of large-size propeller |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190104 Termination date: 20200523 |
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| CF01 | Termination of patent right due to non-payment of annual fee |