CN208458972U - A kind of manometric module for fast implementing wind-tunnel and surveying pressure on a small scale - Google Patents
A kind of manometric module for fast implementing wind-tunnel and surveying pressure on a small scale Download PDFInfo
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- CN208458972U CN208458972U CN201821187736.4U CN201821187736U CN208458972U CN 208458972 U CN208458972 U CN 208458972U CN 201821187736 U CN201821187736 U CN 201821187736U CN 208458972 U CN208458972 U CN 208458972U
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Abstract
The utility model discloses a kind of manometric modules for fast implementing wind-tunnel and surveying pressure on a small scale, one group of pressure tap is connected to balance in wind-tunnel by manometric module to measure on cable, virtually it is a balance by manometric module, the pressure on pressure tap is obtained by the signal-obtaining measured balance on cable；The utility model does not need that a large amount of equipment and pipeline is arranged at wind-tunnel scene as traditional electronic scanner, only need to be rapidly obtained the pressure value of corresponding points in wind-tunnel using the existing balance measurement cable of wind-tunnel, it is convenient and efficient, and there is good anti-electromagnetic interference capability.
Description
Technical field
The present invention relates to wind tunnel test fields, more particularly, to air pressure measurement small-scale in wind-tunnel under electromagnetic environment
Problem.
Background technique
In wind tunnel test, pressure measurement is a very universal content of the test.For pressure measurement, current technology
It is highly developed, there are various test equipments；And the pressure measurement in wind-tunnel mainly uses electronic scanner real
The measurement of existing model surface pressure.
Electronic scanner has that precision is high, rate is fast, the characteristics such as expansible, and the extensive survey of hundreds and thousands of points is pressed and is adopted
For set task, electronic scanner is optimal selection；But have a problem, how much no matter measure points, the base of electronic scanner
This component part is all essential；Therefore, for wind tunnel test, using electronic scanner carry out survey pressure work just need by
Equipment set setting often carries out a test at wind-tunnel scene and just needs to carry out once mounting.
But in the test of certain wind tunnel pressure measurings, it is only necessary to Shuo Shidian, the acquisition of even several points, in addition in certain dynamometry
In test, small-scale static and dynamic pressure measurement also locally can be temporarily carried out to model as needed, to verify dynamometry
As a result.It is just less suitable using electronic scanner in these cases, because electronic scanner is by host computer, system master
Composition, the preparations such as machine, scanning valve, quick-release connector, cable, gas source and gas source controller are comparatively laborious, it is difficult to fast implement
Survey pressure task；Secondly, electronic scanner can be only done static survey pressure test, can not carry out by scan frequency and installation limitation
Fluctuation pressure measurement；In addition, electronic scanner is easy by heavy-duty motor heavy current in past drive manometric test
Electromagnetic interference.
The small-scale or single-point for quickly to meet wind-tunnel therefore, it is necessary to a kind of new pressure instrumentataion surveys pressure demand.
Summary of the invention
The object of the present invention is to provide a kind of test method for fast implementing wind-tunnel and surveying pressure on a small scale, by wind-tunnel itself
Intrinsic interface completes the measurement work to air pressure in the case where not adding equipment additionally.
To achieve the goals above, the present invention adopts the following technical scheme:
One group of pressure tap is connected to wind by manometric module by a kind of manometric module for fast implementing wind-tunnel and surveying pressure on a small scale
It is virtually a balance by manometric module in hole on balance measurement cable, by being surveyed to the signal-obtaining on measurement cable
Press the pressure on hole.
In the above-mentioned technical solutions, the manometric module includes air pressure leading-in end and signal output end, per air pressure all the way
Signal compensator is provided on leading-in end.
In the above-mentioned technical solutions, if the air pressure leading-in end includes being fixed on the seal casinghousing of manometric module
Dry impulse steel pipe is connected with pressure sensor on each impulse steel pipe；The signal output end includes being fixed at survey pressure
Balance cable interface on the seal casinghousing of module, signal compensator one end is connected on pressure sensor, the other end is connected to
Balance cable interface.
In the above-mentioned technical solutions, the pressure sensor is connected on impulse steel pipe by impulse hose.
In the above-mentioned technical solutions, the reference end of external pressure is connected on the baroceptor.
In the above-mentioned technical solutions, the reference end of the external pressure is multi-pass connector, is arranged in manometric module, more
The common end of connectors is reached outside manometric module by steel pipe.
In the above-mentioned technical solutions, the shell of manometric module is metal production, and metal cavity inner surface is provided with one layer absolutely
Electronic device is isolated with metal cavity for edge layer, insulating layer.
In the above-mentioned technical solutions, the shell that the manometric module designs for all-metal has electromagnetic interference shield function.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
Manometric module in the present invention uses the balance line interface specification of wind-tunnel routine test dynamometry, realizes survey pressing mold
Block is in the plug and play of wind-tunnel typical load cell acquisition system and fast implementing for manometric test；
Manometric module in the present invention uses miniature dynamic differential pressure sensor, and overall dimension is small, can be in model
Portion is placed close to testing pressure hole site, and reducing pipeline influences dynamic test bring signal hysteresis, decaying etc., realizes pulsation
Pressure measurement；
Manometric module in the present invention realizes Dynamic High-accuracy by using the design of full metal jacket and embedded insulating layer
The electromagnetic interference shield of pressure sensor and isolation, reduce signal interference；
Manometric module and manometric test method in the present invention, invent balance for manometric module, can should restore a reactionary rule with other
It is flat to unify to be acquired by wind-tunnel typical load cell acquisition system together, measuring system is simplified, realizes that dynamometry surveys pressure synchronous acquisition；
The maximum beneficial effect of the present invention is not needing to need as traditional electronic scanner to set up in wind-tunnel
A large amount of equipment and pipeline, but existing pipe interface in wind-tunnel is directlyed adopt, directly gas is obtained using balance measuring system
Press data.
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 the structural schematic diagram of manometric module；
Fig. 2 is manometric test implementation flow chart；
Wherein: 1 is impulse steel pipe, and 2 be metal shell, and 3 be connection hose, and 4 be sensor, and 5 be reference end, and 6 be signal
Compensator, 7 be multi-pass connector, and 8 be a day plain adapter, and 9 be signal wire, and 10 be insulating layer.
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.
As shown in Figure 1, using a kind of front end manometric module of Modular Structure Design, outer dimension 10mm × 120mm ×
Manometric module can be placed in inside model by 70mm, and pressure signal to be measured on model is directly converted into electric signal, passes through day
Horizontal line cable is connected to wind-tunnel routine balance signal acquiring system, and each manometric module is invented a survey pressure balance, using mentioning
The electric signal measured directly can be reduced into pressure by the preceding module channels coefficient demarcated, wind-tunnel typical load cell acquisition system
Value.Manometric module is designed using full metal jacket, has the ability of shielding external electromagnetic interference, the inside of metal shell is using exhausted
Edge diaphragm completely cuts off contact of the internal electronic device with metal shell.
8 high-precision micro dynamic pressure drop sensors are used inside manometric module, every sensor has signal condition benefit
Device is repaid, the voltage signal that pressure signal is 0~25mv by conditioning compensation is consistent with routine balance signal.8 sensors can be seen
At 8 bridges of general utility balance, power supply and signal cable are welded on standard balance connector, and connector stitch defines same place
Wind-tunnel typical load cell balance cable defines consistent, it can be achieved that the manometric module quickly accessing in wind tunnel test system.
When static manometric test, manometric module is connected to the static acquisition module of wind-tunnel routine balance signal acquiring system.
When dynamic pressure measurement is tested, manometric module is connected to the dynamic acquisition module of wind-tunnel routine balance signal acquiring system.
As shown in Fig. 2 manometric test implementation flow chart, the following detailed description of each step:
The first step screens miniature dynamic pressure drop sensor, has selected wind-tunnel room to be usually used in air intake duct pulsating pressure in this example
The miniature dynamic pressure drop sensors X CQ-062 of power measurement.Sensor diameter 1.7mm, pressure reference end diameter 0.4mm, sound
Step response is outstanding, and precision index is suitable with the electronic scanner of same range.Output signal in energization 20 minutes under a constant
Reach and stabilizes to qualification.Transducer range in each module wants identical.
Second step, demarcates manometric module, and the conversion coefficient of every pressure sensor is different, needs to pass through Accurate Calibration
It obtains.This example demarcates sensor using the pressure testers and wind-tunnel typical load cell acquisition system of 0.02% precision, leads to
The sensor for being unsatisfactory for manometric test requirement can further be rejected by crossing calibration, and every qualified sensor is numbered and is remembered
Record the conversion coefficient of its mapping.
Third step installs manometric module, must be careful when installation because sensor is more accurate valuable.For sensor
Repeatability utilizes, and can not wipe out cable more than needed in order to easy for installation.Installation process refinement is as follows:
1) impulse steel pipe is neatly inserted by the guide hole of metal shell front end and is fixed one by one by screw.
2) from the inside of metal shell to external application gel solidification impulse steel pipe, it is ensured that do not interspace.
3) insulation diaphragm is spread in the inner bottom surface of metal shell.
4) the impulse steel pipe one end protruded into shell is connected with the measurement end of sensor with impulse hose, it will with impulse hose
Pressure multi-pass is respectively exported to be connected with the reference end of sensor, and impulse hose will loosely be inserted in sensor reference end root, the two
Between gap sealed with flexible glue, to its drying.It is careful not to blocking reference end port.
5) pressure multi-pass is screwed the inside design position in shell, the common end of pressure multi-pass is steel pipe, is led to
The aperture for crossing module rear end directly stretches out module-external.
6) power supply of every sensor and signal wire are welded on wind-tunnel standard balance socket, this example is using miniature
The 37 needle rectangular receptacles of J30J, 8 bridges of 8 pressure sensor mapping balances in module, stitch are defined with wind-tunnel standard day
Plug flat seat is consistent, records the sensor number of each bridge mapping.J30J rectangular receptacle is fixed on manometric module with screw rod
Enclosure interior.
7) extra signal wire folding is laid in enclosure interior, insulation diaphragm is placed on it, finally by metal shell
Another side abutting buckle and be screwed.So far, a pressure measuring module just prepares.
4th step connects pressure tap, connects balance cable.According to test needs, the manometric module of corresponding range is selected.It will
Pressure tap (or wind-tunnel stagnation pressure/static pressure) to be measured is connected on the impulse steel pipe of manometric module front end by hose on model, by wind
Hole routine balance measures cable and is connected with the balance socket of manometric module rear end.Manometric module can be fixed on inside model, such as
Fruit will carry out dynamic pressure measurement, should reduce pressure tap to the greatest extent to the connecting line between manometric module.
5th step is completed to survey pressure task with wind-tunnel routine balance signal acquiring system.In the way of usually typical load cell
Data Acquisition Channel is set, the electric signal of acquisition output is obtained into the reset pressure value of each pressure tap multiplied by conversion coefficient.
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 (6)
1. a kind of manometric module for fast implementing wind-tunnel and surveying pressure on a small scale, it is characterised in that the manometric module includes that air pressure introduces
End and signal output end, are often provided with signal compensator on air pressure leading-in end all the way, the air pressure leading-in end includes that fixation is set
Several impulse steel pipes on the seal casinghousing of manometric module are set, are connected with pressure sensor on each impulse steel pipe；It is described
Signal output end includes the balance cable interface being fixed on the seal casinghousing of manometric module, the connection of signal compensator one end
On to pressure sensor, the other end be connected to balance cable interface.
2. a kind of manometric module for fast implementing wind-tunnel and surveying pressure on a small scale according to claim 1, it is characterised in that described
Pressure sensor is connected on impulse steel pipe by impulse hose.
3. a kind of manometric module for fast implementing wind-tunnel and surveying pressure on a small scale according to claim 1, it is characterised in that described
The reference end of external pressure is connected on pressure sensor.
4. a kind of manometric module for fast implementing wind-tunnel and surveying pressure on a small scale according to claim 3, it is characterised in that multiple
The reference end of the sensor is connected on the multi-pass connector being arranged in manometric module, and the common end of multi-pass connector passes through
Steel pipe reaches outside manometric module.
5. a kind of manometric module for fast implementing wind-tunnel and surveying pressure on a small scale according to claim 1 to 4, feature exist
Be metal production in the shell of manometric module, metal cavity inner surface is provided with a layer insulating, insulating layer by electronic device with
Metal cavity isolation.
6. a kind of manometric module for fast implementing wind-tunnel and surveying pressure on a small scale according to claim 5, it is characterised in that described
The shell that manometric module designs for all-metal has electromagnetic interference shield function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821187736.4U CN208458972U (en) | 2018-07-26 | 2018-07-26 | A kind of manometric module for fast implementing wind-tunnel and surveying pressure on a small scale |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821187736.4U CN208458972U (en) | 2018-07-26 | 2018-07-26 | A kind of manometric module for fast implementing wind-tunnel and surveying pressure on a small scale |
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| CN208458972U true CN208458972U (en) | 2019-02-01 |
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| CN201821187736.4U Expired - Fee Related CN208458972U (en) | 2018-07-26 | 2018-07-26 | A kind of manometric module for fast implementing wind-tunnel and surveying pressure on a small scale |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174235A (en) * | 2019-06-24 | 2019-08-27 | 中山大学 | The measuring device and its application method of a kind of surface pressing of model in wind-tunnel |
| CN112113740A (en) * | 2020-11-18 | 2020-12-22 | 中国空气动力研究与发展中心低速空气动力研究所 | Pressure measuring device, pressure measuring method and wind tunnel local airflow deflection angle measuring method |
| CN115575081A (en) * | 2022-12-09 | 2023-01-06 | 中国空气动力研究与发展中心低速空气动力研究所 | Two-dimensional lattice design method and device for wind tunnel pulsating pressure measurement |
-
2018
- 2018-07-26 CN CN201821187736.4U patent/CN208458972U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174235A (en) * | 2019-06-24 | 2019-08-27 | 中山大学 | The measuring device and its application method of a kind of surface pressing of model in wind-tunnel |
| CN112113740A (en) * | 2020-11-18 | 2020-12-22 | 中国空气动力研究与发展中心低速空气动力研究所 | Pressure measuring device, pressure measuring method and wind tunnel local airflow deflection angle measuring method |
| CN112113740B (en) * | 2020-11-18 | 2021-02-09 | 中国空气动力研究与发展中心低速空气动力研究所 | Pressure measuring device, pressure measuring method and wind tunnel local airflow deflection angle measuring method |
| CN115575081A (en) * | 2022-12-09 | 2023-01-06 | 中国空气动力研究与发展中心低速空气动力研究所 | Two-dimensional lattice design method and device for wind tunnel pulsating pressure measurement |
| CN115575081B (en) * | 2022-12-09 | 2023-03-14 | 中国空气动力研究与发展中心低速空气动力研究所 | Two-dimensional lattice design method and device for wind tunnel pulsating pressure measurement |
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