CN204269680U - High-performance wind speed measurement system - Google Patents
High-performance wind speed measurement system Download PDFInfo
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- CN204269680U CN204269680U CN201420587110.8U CN201420587110U CN204269680U CN 204269680 U CN204269680 U CN 204269680U CN 201420587110 U CN201420587110 U CN 201420587110U CN 204269680 U CN204269680 U CN 204269680U
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Abstract
High-performance wind speed measurement system belongs to flow metering technical field, and system can produce the flow field of wide region, high stability and homogeneity, for the quick and precisely detection of multiple measuring wind speed instrument.The utility model provides a kind of high-performance wind speed measurement system being convenient to detect measuring wind speed instrument and test.The utility model comprises entrance, first diffuser, first round corner section, fan section, transition section, second diffuser, second round corner section, rectification section, stable section, contracted flow section, test section, its structural feature entrance, first diffuser, first round corner section, fan section, transition section, second diffuser, second round corner section, rectification section, stable section, contracted flow section joins end to end in the rectangle of lower long limit intermediate openings successively, under rectangle, long limit opening part is test section, entrance, the both sides of contracted flow section long limit opening under being placed in rectangle respectively, first round corner section, second round corner section is placed on the minor face of described rectangle both sides respectively.
Description
Technical field
The utility model belongs to flow metering technical field, and system can produce the flow field of wide region, high stability and homogeneity, for the quick and precisely detection of multiple measuring wind speed instrument.
Background technology
In the world in atmosphere environment supervision (measurement as manufacturing enterprise's harmful smoke amount discharge), the detection (measurement as heavy construction central air conditioner ventilation ability) of room ventilation ambient air quality, safety in production (measurement as coalmine ventilation ventilation ability), widely uses air velocity surveying instrument in a large number in the industry fields such as weather forecast.In addition, air velocity is not only the measurement problem that the forward position such as Aero-Space, precision measurement scientific research field must solve, and is also sports venue, one of index as up to standard in Olympic Games sports buildings.Therefore, air velocity is measured and is closely connected with national defence scientific research, environmental protection, people's lives.
Along with the fast development of measuring wind speed instrument, its wide variety, accuracy of measurement significantly improve, and the testing of a large amount of wind speed instrument relies on traditional wind measuring device, far can not reach requirement, the wind gage of a lot of pin-point accuracy requires all very high to all technical of wind field.The development of wind-tunnel is very early in the world, and adopt with LDA of the country such as English, moral, method, U.S., day is wind speed standard more, its expanded uncertainty of measurement (
k=2) from 0.1% ~ 2.5% not etc.Although the wind speed detection device measuring wind speed uncertainty taking LDA as standard is less, but the price of LDA and costliness thereof, the stabilization time of system is long, during detection, optimum configurations is loaded down with trivial details, standard centering requires harsh, testing result is by temperature, flue gas generation quality, affected by many factors such as test examination instrument fixed positions, and the flue gas sent also easily pollutes tested anemoscope.Domestic measurement technology mechanism a lot of wind speed detection device structures simple, adjust weak effect in flow field, control section is very simple and easy, frequency control way mostly adopts backward potentiometer set mode, and the stability of wind field is not high, and homogeneity is poor, range ability is narrower, usually its flow field uniformity is about 1.5%, and flowing field stability is about 0.5%, and range ratio is less than 1:70.Wind field is longer for stabilization time, and the overall performance of device is not high, seriously constrains the development of wind speed instrument detection and research work.
Summary of the invention
The utility model is exactly for the problems referred to above, provides a kind of high-performance wind speed measurement system being convenient to detect measuring wind speed instrument and test.
For achieving the above object, the utility model adopts following technical scheme, the utility model comprises entrance, first diffuser, first round corner section, fan section, transition section, second diffuser, second round corner section, rectification section, stable section, contracted flow section, test section, its structural feature entrance, first diffuser, first round corner section, fan section, transition section, second diffuser, second round corner section, rectification section, stable section, contracted flow section joins end to end in the rectangle of lower long limit intermediate openings successively, under rectangle, long limit opening part is test section, entrance, the both sides of contracted flow section long limit opening under being placed in rectangle respectively, first round corner section, second round corner section is placed in (described entrance on the minor face of described rectangle both sides respectively, first diffuser, first round corner section, fan section, transition section, second diffuser, second round corner section, rectification section, stable section, contracted flow section all adopts tube structure).
As another kind of preferred version, blower fan is provided with in fan section described in the utility model, fan shaft is connected with direct current generator output shaft, DC MOTOR CONTROL signal input port is connected with the control signal output port of variable-frequence governor, the control signal input port of variable-frequence governor is connected with the control signal output port of program controller, and the control signal input port of program controller is connected with the control signal output port of Industrial Control Computer; The shaft part of described direct current generator is provided with rotary encoder, and the signal output port of rotary encoder is connected with the signal input port of Industrial Control Computer; Described contracted flow section exit is provided with standard wind speed instrument, and the signal output port of standard wind speed instrument is connected with the signal input port of Industrial Control Computer.
As another kind of preferred version, the blade of blower fan described in the utility model adopts aluminium alloy vane, and the blade of blower fan and wheel rim adopt numerical control one-shot forming structure; Described contracted flow section adopts bicubic curvilinear structures; Described steady flow segment adopts hexagonal honeycomb generating apparatus.
As another kind of preferred version, the utility model also comprises hand held controller, and hand held controller is provided with the wind speed setting button of described blower fan, the signal transmission port of controller is connected with the signal transmission port of described Industrial Control Computer by 485 serial ports.
As another kind of preferred version, the signal input port of Industrial Control Computer described in the utility model is connected with the signal output port of signal acquisition module, the signal input port of signal acquisition module respectively with the signal output port of pressure unit, the signal output port of humiture transducer, the signal output port of standard pitot tube place pressure differential detection pressure difference transmitter, the signal output port of hydraucone adjustment plate place temperature detection temperature transmitter is connected, standard pitot tube is arranged on described contracted flow section exit, adjustment plate is arranged on entrance (temperature, pressure, humidity transmitter can carry out wind speed correction automatically, standard wind speed is obtained by standard wind speed meter or standard pitot tube).
Secondly, fan section described in the utility model is connected by nonmetal damper cylinder with transition section, damper cylinder two ends respectively by sealing cassette tape and fan section, transition section is non-rigid is connected.
In addition, the second round corner section described in the utility model is provided with gas-flow deflector.
The utility model beneficial effect.
The utility model adopts loop fashion, the unsteady flow field that fan is produced is through the arrangement of transition section, diffuser, round corner section, rectification section, stable section, contracted flow section, form uniform and stable flow field, detection and the experiment of all kinds of measuring wind speed instrument can be carried out at test section.
Measurement range through China National Measuring Science Research Inst.'s pick-up unit reaches 0.2m/s ~ 50m/s, and the flow field uniformity of device is better than 0.37%; Flowing field stability is better than 0.10%; Flow field turbulence level is better than 0.68%.Multinomial technical indicator is better than the technical merit of domestic and international technical body same device.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described further.The utility model protection domain is not only confined to the statement of following content.
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model rotational speed regulation control block diagram.
Embodiment
As shown in the figure, the utility model comprises direct current generator, blower fan, transition section, diffuser, round corner section, rectification section, stable section, contracted flow section, test section, entrance.The mode that system can adopt double-closed-loop control and divergence type PID to combine controls, and the inner ring of double loop speed-regulating system is current regulator, and outer shroud is speeds control ring, and direct current generator shaft part installs the feedback of rotary encoder as speeds control ring additional.Each ring, containing a regulator, can realize variable voltage control and the excitation control of DC motor speed of direct current motor, can increase the speed adjustable range of direct current motor, improve the low-speed characteristic of motor.Under this control mode, the control of wind speed is by realizing the control of rotation speed of fan.Wind speed control system adopts Feedforward-feedback control system.Feedforward control refers to that the mathematical model control rotating speed of the rotation speed of fan-wind speed of Industrial Control Computer system is implanted in utilization in advance, controlling curve adopts the curve of a large amount of actual experiment matching rotating speed and wind speed, can directly reach set wind speed under normal circumstances, if do not reach wind speed requirement, then feedback controls, and adjust rotating speed, the amplitude of adjustment is determined by the difference of current wind speed and wind speed setting, generally, once adjust at the most and just can reach set wind speed.
When the control overflow of wind speed is higher, as air speed error be less than 0.2m/s time, two close cycles and divergence type pid control mode is adopted to control, because blast velocity control realizes by controlling motor speed, be different from temperature to control, motor one can not be issued to rotating speed of target, can have very large damage to motor, controls so adopt two kinds of control methods to combine.System software is preset with threshold value, before reaching threshold value, control system adopts double circle controling mode to reach the wind speed of setting threshold value, at this moment the rotating speed wind speed adjustment curve that system adopts built-in matching by experiment to obtain carries out speed governing, after wind speed is greater than threshold value, divergence type pid control mode is got involved and is carried out blast velocity control, and pid control mode adoption rate integration and differentiation carries out setting parameter.
Adopt two standard modes of standard wind speed instrument and standard pitot tube, achieve the measuring wind speed scope of ultra-wide, reach the wind speed range that common two wind-tunnel just can reach, wind speed range ratio reaches 1:250.High rigidity aluminium alloy vane is applied to fan section by system, and blade and wheel rim are digital control processing one-shot forming, ensure that the accuracy of blades installation, achieves the technical characteristic of slow-speed of revolution high flow rate.Contracted flow section adopts bicubic curve (existing structure) combination property optimum, can warranty test section nucleus air-flow stable and evenly well.Steady flow segment adopts hexagonal honeycomb generating apparatus, takes into account flowing field stability and the pressure loss.Manual, the automatic two kinds of control modes of system disposition, manually controlled by hand held controller, controller is provided with wind speed setting button, by 485 and Industrial Control Computer communication, the instruction that button is pressed directly passes to Industrial Control Computer, and Industrial Control Computer is according to order-driven electric machine speed regulation.Automatically for presetting required wind speed point, detecting and starting postindustrial controller and automatically run and image data, after current wind speed measurement, carry out any detection lower; Both directly can be controlled by Industrial Control Computer, also can be controlled by hand-held controller.Control system can arrange automatic data collection, remote shooting reads direct-reading instrument display data, automatically calculates data, data base administration part, greatly can improve detection efficiency; There is the running status fault cues function of surveillance equipment simultaneously.
Industrial Control Computer carries out communication by the variable-frequence governor of programming controller in 485 communication modes and switch board, control variable-frequence governor and drive direct current generator, direct current generator drives fan turns to produce wind, fan section is connected by damper cylinder with main body, damper cylinder is made up of nonmetallic materials, for the connection of fan section and device transition section, owing to not being adopt to be rigidly connected, by sealing cassette tape, two parts are linked together, the impact of vibration on device body can be reduced.Wind carries out flow field flaring by transition section, by diffuser, the kinetic energy of gas is converted to pressure energy, to reduce wind tunnel energy loss, gas-flow deflector (existing product) through round corner section prevents burbling, improve air current flow, reduce windage loss, greatly reduce air-flow and change the various harmful effects brought in direction.When air-flow is by producing eddy current when corner, guide plate is set around the corner, can reduce well or avoid to produce eddy current, then air-flow is led directly through the honeycomb of stable section by flow field, it is made to be parallel to air channel axis, maelstrom in air-flow is cut into micro cyclone, accelerate the decay of vortex, eventually passing contracted flow section makes uniform stream accelerate to shrink, the vertical and horizontal turbulivity of air-flow can be reduced simultaneously, make flow field stable and uniform, boundary-layer (part close to device inwall) is thin as far as possible and be not separated, the detection of all kinds of wind speed instrument just can be carried out at test section.Wind, by proceeding circulation after test section, is arranged by entrance and diffuser, flows through round corner section and reenter fan section, promotes blower fan and continues to run.
The rotational speed regulation mode of the utility model system can be the double control mode of double closed loop speed regulation system and divergence type PID combination, and concrete blast velocity control mode is; Instruction is sent to frequency conversion speed-adjusting system by Industrial Control Computer, variable-frequence governor controls blower fan and brings into operation, progressively reach required air speed value, motor is furnished with scrambler for monitoring the rotating speed of blower fan, and is fed back to Industrial Control Computer, and compares the deviation of actual speed and setting speed, deviation is had then to adjust, standard wind speed is also fed back to Industrial Control Computer by standard wind speed instrument simultaneously, for monitoring the deviation of actual wind speed value and wind speed setting value, if there is deviation, adjusts.The rotating speed mode of adjustment is two kinds, one is two close cycles mode, when larger for wind speed setting deviation, this mode carries out two close cycles adjustment according to the wind speed spin rates controlling curve preset, wind speed setting is undertaken calculating tachometer value by controlling curve function, variable-frequence governor regulates motor to reach setting speed value, and calculation of wind speed value deviation, feed back to Industrial Control Computer if any deviation and regulate again.Another kind of mode adopts divergence type PID regulative mode, when less for wind speed setting deviation, setting threshold parameter and pid parameter is needed before adjustment, below setting threshold value, (curve of least square fitting is also used by mass data with rotating speed blast velocity control curve during adjustment, the process of matched curve is those skilled in the art's day-to-day works as requested) carry out two close cycles adjustment, reach threshold value adopts PID to regulate later, this control mode speed governing is very fast, and accuracy is higher.
Be understandable that, above about specific descriptions of the present utility model, the technical scheme described by the utility model embodiment is only not limited to for illustration of the utility model, those of ordinary skill in the art is to be understood that, still can modify to the utility model or equivalent replacement, to reach identical technique effect; Needs are used, all within protection domain of the present utility model as long as meet.
Claims (7)
1.
high-performance wind speed measurement system, comprise entrance, first diffuser, first round corner section, fan section, transition section, second diffuser, second round corner section, rectification section, stable section, contracted flow section, test section, it is characterized in that entrance, first diffuser, first round corner section, fan section, transition section, second diffuser, second round corner section, rectification section, stable section, contracted flow section joins end to end in the rectangle of lower long limit intermediate openings successively, under rectangle, long limit opening part is test section, entrance, the both sides of contracted flow section long limit opening under being placed in rectangle respectively, first round corner section, second round corner section is placed on the minor face of described rectangle both sides respectively.
2.
high-performance wind speed measurement system according to claim 1, it is characterized in that being provided with blower fan in described fan section, fan shaft is connected with direct current generator output shaft, DC MOTOR CONTROL signal input port is connected with the control signal output port of variable-frequence governor, the control signal input port of variable-frequence governor is connected with the control signal output port of program controller, and the control signal input port of program controller is connected with the control signal output port of Industrial Control Computer; The shaft part of described direct current generator is provided with rotary encoder, and the signal output port of rotary encoder is connected with the signal input port of Industrial Control Computer; Described contracted flow section exit is provided with standard wind speed instrument, and the signal output port of standard wind speed instrument is connected with the signal input port of Industrial Control Computer.
3.
high-performance wind speed measurement system according to claim 2, it is characterized in that the blade of described blower fan adopts aluminium alloy vane, the blade of blower fan and wheel rim adopt numerical control one-shot forming structure; Described contracted flow section adopts bicubic curvilinear structures; Described stable section adopts hexagonal honeycomb generating apparatus.
4.
high-performance wind speed measurement system according to claim 2, characterized by further comprising hand held controller, hand held controller is provided with the wind speed setting button of described blower fan, the signal transmission port of controller is connected with the signal transmission port of described Industrial Control Computer by 485 serial ports.
5.
high-performance wind speed measurement system according to claim 2, it is characterized in that the signal input port of described Industrial Control Computer is connected with the signal output port of signal acquisition module, the signal output port that the signal input port of signal acquisition module adjusts plate place temperature detection temperature transmitter with the signal output port of pressure unit, the signal output port of humiture transducer, the signal output port of standard pitot tube place pressure differential detection pressure difference transmitter, hydraucone is respectively connected, standard pitot tube is arranged on described contracted flow section exit, and adjustment plate is arranged on entrance.
6.
according to claim 1, high-performance wind speed measurement system, is characterized in that described fan section is connected by nonmetal damper cylinder with transition section, damper cylinder two ends respectively by sealing cassette tape and fan section, transition section is non-rigid is connected.
7.
according to claim 1, high-performance wind speed measurement system, is characterized in that described second round corner section is provided with gas-flow deflector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420587110.8U CN204269680U (en) | 2014-10-13 | 2014-10-13 | High-performance wind speed measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420587110.8U CN204269680U (en) | 2014-10-13 | 2014-10-13 | High-performance wind speed measurement system |
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| CN204269680U true CN204269680U (en) | 2015-04-15 |
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| CN201420587110.8U Expired - Fee Related CN204269680U (en) | 2014-10-13 | 2014-10-13 | High-performance wind speed measurement system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572422A (en) * | 2014-10-13 | 2016-05-11 | 辽宁省计量科学研究院 | High performance wind speed detection system |
| CN105628965A (en) * | 2015-12-24 | 2016-06-01 | 无锡信大气象传感网科技有限公司 | Wind power monitoring device |
| CN106018141A (en) * | 2016-04-29 | 2016-10-12 | 敦煌研究院 | Earthen ruins dedicated wind erosion simulation device |
| CN115933517A (en) * | 2023-03-09 | 2023-04-07 | 中国航空工业集团公司哈尔滨空气动力研究所 | Control system for bipolar counter-rotating fan of subsonic wind tunnel power section |
-
2014
- 2014-10-13 CN CN201420587110.8U patent/CN204269680U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572422A (en) * | 2014-10-13 | 2016-05-11 | 辽宁省计量科学研究院 | High performance wind speed detection system |
| CN105628965A (en) * | 2015-12-24 | 2016-06-01 | 无锡信大气象传感网科技有限公司 | Wind power monitoring device |
| CN106018141A (en) * | 2016-04-29 | 2016-10-12 | 敦煌研究院 | Earthen ruins dedicated wind erosion simulation device |
| CN106018141B (en) * | 2016-04-29 | 2019-12-31 | 敦煌研究院 | Special wind erosion simulation device for earthen archaeological site |
| CN115933517A (en) * | 2023-03-09 | 2023-04-07 | 中国航空工业集团公司哈尔滨空气动力研究所 | Control system for bipolar counter-rotating fan of subsonic wind tunnel power section |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150415 Termination date: 20211013 |