CN209727992U - A kind of miniature multi-angle air velocity transducer calibration system - Google Patents
A kind of miniature multi-angle air velocity transducer calibration system Download PDFInfo
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- CN209727992U CN209727992U CN201920740562.8U CN201920740562U CN209727992U CN 209727992 U CN209727992 U CN 209727992U CN 201920740562 U CN201920740562 U CN 201920740562U CN 209727992 U CN209727992 U CN 209727992U
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- 238000012360 testing method Methods 0.000 claims abstract description 37
- 230000008602 contraction Effects 0.000 claims abstract description 25
- 238000013016 damping Methods 0.000 claims abstract description 10
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 7
- UJCHIZDEQZMODR-BYPYZUCNSA-N (2r)-2-acetamido-3-sulfanylpropanamide Chemical compound CC(=O)N[C@@H](CS)C(N)=O UJCHIZDEQZMODR-BYPYZUCNSA-N 0.000 claims description 3
- 241001669680 Dormitator maculatus Species 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003739 neck Anatomy 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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Abstract
The utility model is a kind of miniature multi-angle air velocity transducer calibration system, including small-sized calibration wind-tunnel, two-freedom fixture and blast velocity control module composition, small-sized calibration wind-tunnel includes sequentially connected power section, stable section and contraction section, the driving blade and guide vane blade of direct current generator driving are provided in power section, honeycomb and damping screen are provided in stable section, contraction section uses five power shrinkage curves, the air outlet terminal interior surface of contraction section is inlaid with several wind pressure sensors, two-freedom fixture is located at the air outlet side of small-sized calibration Wind Tunnel Contraction, two-freedom fixture rotates in perpendicular for clamping anemobiagraph test sample and being able to drive anemobiagraph test sample, blast velocity control module includes SCM system, the wind pressure sensor passes through the revolving speed of SCM system PID control direct current generator.The system easily can be demarcated precisely for air velocity transducer sample.
Description
Technical field
The utility model is to be related to transducer calibration technical field, specifically a kind of miniature multi-angle air velocity transducer
Calibration system.
Background technique
Anemobiagraph is using preceding being demarcated, and especially hot-wire anemometer, the measurement of wind speed are engineering technology measurement necks
The important component in domain, the measurement means for being now widely used in air velocity mainly have hot-wire technique, ultrasonic tesint skill
Art, pressure difference measuring technology etc..It is the fundamental requirement for guaranteeing measurement accuracy to the accurate calibration of sensor before wind speed test, especially
Hot-wire technique is very high to the calibration request of sensor, will be demarcated before each use, this just proposes calibration facility
Very high requirement.Large tunnel can provide stable wind speed, but must empty all devices in trial zone using preceding, using rise
It is next very inconvenient, and large batch of rating test cost is very high.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of miniature multi-angle air velocity transducer calibration systems, this is
System can be demarcated easily for air velocity transducer.
In order to solve the above technical problems, the technical solution adopted by the utility model is:
A kind of miniature multi-angle air velocity transducer calibration system, it is characterised in that: including small-sized calibration wind-tunnel, two-freedom
Fixture and blast velocity control module composition, the small-sized calibration wind-tunnel are tubular structure, including sequentially connected power section, steady
Determine section and contraction section, the driving blade and guide vane blade of direct current generator driving are provided in the power section, it is described
Honeycomb and damping screen are provided in stable section, the contraction section uses five power shrinkage curves, and the contraction section goes out
Air port terminal interior surface is inlaid with several wind pressure sensors, several wind pressure sensors are along the air outlet end of contraction section annular
It is uniformly distributed；
The two-freedom fixture is located at the air outlet side of small-sized calibration Wind Tunnel Contraction, the two-freedom folder
Tool rotates in perpendicular for clamping anemobiagraph test sample and being able to drive anemobiagraph test sample, during rotation
Guarantee that the test lead of anemobiagraph test sample is located on the extended line of small-sized calibration wind-tunnel axis；
The blast velocity control module includes SCM system, and the wind pressure sensor and SCM system input terminal are believed
Number connection, the controller signals of the SCM system output end and direct current generator, which control, to be connected.
The direct current generator is fixedly mounted on guide vane hub centre, and the wheel hub is fixed on power by guide vane blade
On section inner wall, the output shaft of the driving blade and direct current generator is sequentially connected, the driving blade and guide vane blade and blade
Piece quantity prime number each other.
The driving blade uses NACA blade profile, and wheel hub ratio is 0.48, and driving blade number is 7, guide vane lobe numbers
It is 9, direct current generator rated speed 7000rpm, voltage 24V, torque 0.1NM, the power 100W control voltage 2
For 0 ~ 5V.
The honeycomb is spliced to form honeycomb, each regular hexagon tubbiness knot by multiple regular hexagon barrel-like structures
Structure is 20mm to edge lengths, and with a thickness of 0.2mm, length 60mm, the damping screen is worked out by wire.
The stabilization segment length 150mm.
The contraction section uses five power shrinkage curves, shrinkage ratio 7.72:1.
The contraction segment length 200mm.
The air outlet terminal interior surface of the contraction section is inlayed there are four wind pressure sensor, wind pressure sensor and single-chip microcontroller
System is connected by ii2 communication protocol signals, and the SCM system uses the revolving speed of PID control direct current generator.
The two-freedom fixture includes pedestal, and the upper surface of the pedestal, which is fixed by the bracket, is equipped with steering engine,
The output shaft of the steering engine and swing arm are sequentially connected, and the output shaft of the steering engine is for driving swing arm plane where swing arm
Interior rotation is provided with stationary fixture in the swing arm, and the stationary fixture is for clamping anemobiagraph test sample.
This kind of miniature multi-angle air velocity transducer calibration system can be the beneficial effects are as follows: first, by driving
Guide vane blade is arranged in the air side of blade, ensure that steady air current by guide vane blade, avoids forming whirlpool in pipeline.Second,
The setting of honeycomb, damping screen reduces turbulent flow and the radial wind speed purpose of elimination for reaching.Third, wind pressure sensor carry out AD and turn
It changes and transmits data to single-chip microcontroller in real time, control program uses PID control motor speed, reaches 0 ~ 55m/s internal standard wind speed outlet air
It is required that forming closed-loop control between wind pressure sensor and single-chip microcontroller and direct current generator, the constant and smart of wind speed ensure that
Accuracy.4th, anemobiagraph test sample can make its yaw angle and pitch angle that 360 ° of any rotations occur under the drive of swing arm,
The test lead of anemobiagraph is on the central axes of wind-tunnel, so that anemobiagraph can be with stable testing outlet air wind speed and direction at any angle.
5th, compared with traditional calibration wind-tunnel, the small-sized calibration wind-tunnel tail portion in the structure does not repeat setting stable section, and reason is
Stable section setting in tail portion is too long, will affect overall dimensions, and the anemobiagraph for needing to demarcate is controlled in the center of air outlet, turbulivity control
Processing procedure degree does not need to increase tail portion stable section when preferable, and further, the stable section setting of tail portion is too long, and boundary layer friction can increase
Add, influences wind velocity out.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of miniature multi-angle air velocity transducer calibration system of the utility model.
Fig. 2 is a kind of structural representation of the miniature small-sized calibration wind-tunnel of multi-angle air velocity transducer calibration system of the utility model
Figure.
Fig. 3 is a kind of structural representation of miniature multi-angle air velocity transducer calibration system two-freedom fixture of the utility model
Figure.
Figure of description mark: 1, small-sized calibration wind-tunnel；2, two-freedom fixture；3, power section；4, stable section；5, it shrinks
Section；6, direct current generator；7, driving blade；8, guide vane blade；9, honeycomb；10, damping screen；11, wind pressure sensor；12, pedestal；
13, steering engine；14, swing arm；15, stationary fixture；16, anemobiagraph test sample.
Specific embodiment
The utility model is further described below in conjunction with Figure of description and specific preferred embodiment.
As shown in Figure 1, a kind of miniature multi-angle air velocity transducer calibration system, it is characterised in that: including small-sized calibration wind
Hole 1, two-freedom fixture 2 and blast velocity control module composition, the small-sized calibration wind-tunnel 1 are tubular structure, including sequentially
Power section 3, stable section 4 and the contraction section 5 of connection are provided with the driving leaf of the driving of direct current generator 6 in the power section 3
Piece 7 and guide vane blade 8, honeycomb 9 and damping screen 10 are provided in the stable section 4, and the contraction section 5 uses five powers
Shrinkage curve, the air outlet terminal interior surface of the contraction section 5 are inlaid with several wind pressure sensors 11, several wind pressure pass
Sensor 11 is uniformly distributed along the air outlet end annular of contraction section 5；
The two-freedom fixture 2 is located at the air outlet side of small-sized 1 contraction section 5 of calibration wind-tunnel, and described two freely
Degree fixture 2 rotates in perpendicular for clamping anemobiagraph test sample 16 and being able to drive anemobiagraph test sample 16, In
Guarantee that the test lead of anemobiagraph test sample 16 is located on the extended line of small-sized 1 axis of calibration wind-tunnel in rotation process；
The blast velocity control module includes SCM system, the wind pressure sensor 11 and SCM system input terminal
The controller signals of signal connection, the SCM system output end and direct current generator 6, which control, to be connected.
In the present embodiment, direct current generator 6 is fixedly mounted on guide vane hub centre, and the wheel hub is solid by guide vane blade 8
It is scheduled on 3 inner wall of power section, the output shaft of the driving blade 7 and direct current generator 6 is sequentially connected, the driving blade 7
With 8 blade quantity of guide vane blade prime number each other.
In the present embodiment, driving blade 7 uses NACA blade profile, and wheel hub ratio is 0.48, and 7 number of driving blade is 7, guide vane leaf
8 number of piece is 9, direct current generator 6 rated speed 7000rpm, voltage 24V, torque 0.1NM, the power 100W, control
Voltage 2 processed is 0 ~ 5V.
In the present embodiment, honeycomb 9 is spliced to form honeycomb, each regular hexagon by multiple regular hexagon barrel-like structures
Barrel-like structure is 20mm to edge lengths, with a thickness of 0.2mm, length 60mm, the damping screen 10 worked out by wire and
At.
Further, the setting of honeycomb 9 and damping screen 10 reduces turbulent flow and the radial wind speed purpose of elimination to reach.Resistance
The setting of Buddhist nun's net 10 can further smash the whirlpool on rear side of honeycomb.
In the present embodiment, 4 length 150mm of stable section.
In the present embodiment, contraction section 5 uses five power shrinkage curves, shrinkage ratio 7.72:1.
Further, contraction section can uniformly accelerate air-flow, can reach flow velocity required for experiment, while can
The flowing quality for further improving air-flow, reduces turbulivity.
In the present embodiment, 5 length 200mm of contraction section.
In the present embodiment, the air outlet terminal interior surface of contraction section 5 is inlayed there are four wind pressure sensor 11, wind pressure sensor
11 are connect with SCM system by ii2 communication protocol signals, and the SCM system is using PID control direct current generator 6
Revolving speed.
Further, wind pressure sensor 11 uses Bosch bmp180 sensor, and SCM system uses stm32 monolithic owner
Control, since wind pressure sensor 11 is embedded in inner wall, will not have any impact to the outlet air of air outlet.Four wind pressure sensors
11 are AD converted and transmit data to SCM system in real time, and control program uses PID control motor speed, reaches 0 ~ 55m/s
Internal standard wind speed outlet air requirement.Closed-loop control is formed between wind pressure sensor and single-chip microcontroller and direct current generator, ensure that outlet air
The constant and precision of wind speed.
In the present embodiment, two-freedom fixture 2 includes pedestal 12, and the upper surface of the pedestal 12 is fixed by the bracket peace
Equipped with steering engine 13, the output shaft of the steering engine 13 and swing arm 14 are sequentially connected, and the output shaft of the steering engine 13 is for driving
Swing arm 14 is provided with stationary fixture 15, the stationary fixture 15 on 14 place rotation in surface of swing arm, the swing arm 14
For clamping anemobiagraph test sample 16.
Further, two-freedom fixture 2 can make the yaw angle of anemobiagraph test sample 16 and pitch angle occur 360 °
Any rotation, because no matter how the test lead of anemobiagraph test sample 16 turns on the central axes of small-sized calibration wind-tunnel 1
Dynamic, the front end of anemobiagraph test sample 16 remains on the central axes of small-sized calibration wind-tunnel 1, so that anemobiagraph test
Sample 16 can be with stable testing outlet air wind speed and direction at any angle.Anemobiagraph test sample 16 may finally precisely be marked
It is fixed.
When to 16 measurement range of anemobiagraph test sample and precision calibration, setting unit wind speed testing site: 10m/s,
15m/s, 20m/s, 25m/s, 30m/s, 35m/s, 40m/s, 45m/s, 50m/s, 55m/s start small-sized calibration wind-tunnel 1, according to
Above-mentioned 10 testing sites set air outlet wind pressure, using 6 revolving speed of wind pressure sensor PID control direct current generator, acquire anemobiagraph and survey
Test agent 16 surveys wind speed and wind-tunnel actual wind speed, surveys wind speed and wind in each wind speed testing site calculation of wind speed instrument test sample 16
The average value of hole wind speed, and by error analysis, determine whether anemobiagraph test sample 16 meets the requirements of the standard.
Above are merely preferred embodiments of the utility model, the protection scope of the utility model is not limited merely to above-mentioned
Embodiment, technical solution belonging to the idea of the present invention belong to the protection scope of the utility model.It should be pointed out that pair
For those skilled in the art, several improvements and modifications without departing from the principle of the utility model,
It should be regarded as the protection scope of the utility model.
Claims (9)
1. a kind of miniature multi-angle air velocity transducer calibration system, it is characterised in that: freely including small-sized calibration wind-tunnel (1), two
Spending fixture (2) and blast velocity control module composition, the small-sized calibration wind-tunnel (1) is tubular structure, including sequentially connected
Power section (3), stable section (4) and contraction section (5), the interior drive for being provided with direct current generator (6) driving of the power section (3)
Movable vane piece (7) and guide vane blade (8), the stable section (4) is interior to be provided with honeycomb (9) and damping screen (10), the receipts
Contracting section (5) uses five power shrinkage curves, and the air outlet terminal interior surface of the contraction section (5) is inlaid with several wind pressure biography
Sensor (11), several wind pressure sensors (11) are uniformly distributed along the air outlet end annular of contraction section (5)；
The two-freedom fixture (2) is located at the air outlet side of small-sized calibration wind-tunnel (1) contraction section (5), and described two certainly
By degree fixture (2) for clamping anemobiagraph test sample (16) and being able to drive anemobiagraph test sample (16) in perpendicular
Rotation guarantees that the test lead of anemobiagraph test sample (16) is located at the extension of small-sized calibration wind-tunnel (1) axis during rotation
On line；
The blast velocity control module includes SCM system, and the wind pressure sensor (11) and SCM system input terminal are believed
Number connection, the controller signals of the SCM system output end and direct current generator (6), which control, to be connected.
2. a kind of miniature multi-angle air velocity transducer calibration system according to claim 1, it is characterised in that: described is straight
Galvanic electricity machine (6) is fixedly mounted on guide vane hub centre, and the wheel hub is fixed on power section (3) inner wall by guide vane blade (8)
On, the output shaft of the driving blade (7) and direct current generator (6) is sequentially connected, the driving blade (7) and guide vane blade
(8) blade quantity prime number each other.
3. a kind of miniature multi-angle air velocity transducer calibration system according to claim 2, it is characterised in that: the drive
Movable vane piece (7) uses NACA blade profile, and wheel hub ratio is 0.48, and driving blade (7) number is 7, and guide vane blade (8) number is 9, described
Direct current generator (6) rated speed 7000rpm, voltage 24V, torque 0.1NM, power 100W, control voltage 2 be 0 ~
5V。
4. a kind of miniature multi-angle air velocity transducer calibration system according to claim 1, it is characterised in that: the bee
Nest device (9) is spliced to form honeycomb by multiple regular hexagon barrel-like structures, each regular hexagon barrel-like structure to edge lengths
For 20mm, with a thickness of 0.2mm, length 60mm, the damping screen (10) is worked out by wire.
5. a kind of miniature multi-angle air velocity transducer calibration system according to claim 4, it is characterised in that: described is steady
Determine section (4) length 150mm.
6. a kind of miniature multi-angle air velocity transducer calibration system according to claim 1, it is characterised in that: the receipts
Contracting section (5) uses five power shrinkage curves, shrinkage ratio 7.72:1.
7. a kind of miniature multi-angle air velocity transducer calibration system according to claim 6, it is characterised in that: the receipts
Contracting section (5) length 200mm.
8. a kind of miniature multi-angle air velocity transducer calibration system according to claim 1, it is characterised in that: the receipts
The air outlet terminal interior surface of contracting section (5) is inlayed there are four wind pressure sensor (11), wind pressure sensor (11) and SCM system
It is connected by ii2 communication protocol signals, the SCM system uses the revolving speed of PID control direct current generator (6).
9. a kind of miniature multi-angle air velocity transducer calibration system according to claim 1, it is characterised in that: described two
Freedom degree fixture (2) includes pedestal (12), and the upper surface of the pedestal (12), which is fixed by the bracket, is equipped with steering engine (13), institute
The output shaft for the steering engine (13) stated and swing arm (14) are sequentially connected, and the output shaft of the steering engine (13) is for driving swing arm (14)
Stationary fixture (15), the stationary fixture are provided on rotation in surface where swing arm (14), the swing arm (14)
(15) for clamping anemobiagraph test sample (16).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920740562.8U CN209727992U (en) | 2019-05-22 | 2019-05-22 | A kind of miniature multi-angle air velocity transducer calibration system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920740562.8U CN209727992U (en) | 2019-05-22 | 2019-05-22 | A kind of miniature multi-angle air velocity transducer calibration system |
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| CN209727992U true CN209727992U (en) | 2019-12-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441996A (en) * | 2020-04-07 | 2020-07-24 | 北京航空航天大学 | Noise suppression fan |
| CN113804397A (en) * | 2021-11-18 | 2021-12-17 | 中国飞机强度研究所 | Open type wind tunnel test flow field uniformity and stability calibration system in closed laboratory |
| CN117825753A (en) * | 2024-03-04 | 2024-04-05 | 中国航空工业集团公司沈阳空气动力研究所 | Monofilament hot wire calibration device and method in extremely low speed range |
-
2019
- 2019-05-22 CN CN201920740562.8U patent/CN209727992U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111441996A (en) * | 2020-04-07 | 2020-07-24 | 北京航空航天大学 | Noise suppression fan |
| CN113804397A (en) * | 2021-11-18 | 2021-12-17 | 中国飞机强度研究所 | Open type wind tunnel test flow field uniformity and stability calibration system in closed laboratory |
| CN117825753A (en) * | 2024-03-04 | 2024-04-05 | 中国航空工业集团公司沈阳空气动力研究所 | Monofilament hot wire calibration device and method in extremely low speed range |
| CN117825753B (en) * | 2024-03-04 | 2024-05-28 | 中国航空工业集团公司沈阳空气动力研究所 | Monofilament hot wire calibration device and method in extremely low speed range |
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Granted publication date: 20191203 Termination date: 20200522 |