CN106124156A - For studying the testing equipment of droplet drift and for the processing method of this equipment - Google Patents
For studying the testing equipment of droplet drift and for the processing method of this equipment Download PDFInfo
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- CN106124156A CN106124156A CN201610446352.9A CN201610446352A CN106124156A CN 106124156 A CN106124156 A CN 106124156A CN 201610446352 A CN201610446352 A CN 201610446352A CN 106124156 A CN106124156 A CN 106124156A
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- droplet
- vortex
- slide block
- generating means
- drift
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
Abstract
The present invention discloses a kind of testing equipment for studying droplet drift and the processing method for this equipment.Wherein, described equipment includes: motor that towing guide rail, the slide block being arranged on towing guide rail, carry trailing vortex generating means on slide block and droplet generating means are connected with slide block and PIV system, under the effect of the pulling force of motor generation, slide block is in preset speed along described towing slide, and drives trailing vortex generating means to produce the trailing vortex comprising trace particle and droplet generating means generation droplet；PIV system, for capturing trailing vortex and droplet at fixing exhibition moving image in plane, and processes according to moving image and obtains droplet drift and vortex movement rule over time.The present invention is moved by the vortex movement under simulation full-scale condition and droplet, it is possible to analyze the dependency relation obtaining droplet drift with vortex movement, and the research for the float of mist droplet problem during aerial pesticide provides theoretical direction.
Description
Technical field
The present invention relates to testing equipment field, in particular it relates to a kind of for study droplet drift testing equipment and
Processing method for this equipment.
Background technology
Along with the development of modern precision agriculture technology, aviation plant protection technology is widely used to agriculture field.At present, full generation
There is agriculture and forestry aircraft about 30,000 frame on boundary, year working area 100,000,000 hectares, aircraft operation area accounts for the 17% of total area under cultivation.Agriculture
Industry aviation plant protection, as a rising industry, has huge development space and wide market prospect.And fixed wing airplane is planted
Protecting operation, to have the speed of a ship or plane fast, and spraying swath is big, and drug loading is many, and the ETS estimated time of sailing that continues is long, is limited, by landform, features such as lacking, with traditional artificial,
Semi-mechanization plant protection operation is compared, its operation economic benefit highly significant.But, float of mist droplet problem is still fixed wing airplane and exists
The subject matter faced at present during plant protection operation.The droplet that fixed wing airplane sprays is many by trailing vortex air-flow, surroundings wind field etc.
Aspect factor affects, and easily produces drift, thus bring serious water and soil resources to pollute, non-targeted chemical injury of crops and people and animals strong
The problems such as health threat.1975, the chemical substance drift of U.S. Environmental Protection Agency (EPA) estimated 10%～60% to distance objective 300m with
On region, cause serious air pollution, water to pollute and soil pollution.
Fig. 1 is to study droplet drift and the field experiment of deposition effect during fixed wing airplane dispenser in prior art
Schematic diagram.As it is shown in figure 1, the existing experiment for fixed wing airplane float of mist droplet and deposition is mainly the experiment of Live Flying place
(field test).Which is mainly by arranging that in both sides, navigation channel mylar card, water sensitive paper etc. collect the mist of superficial deposit
Drip, and by arranging that in far field the droplet of airborne shift collected by the cellosilk of differing heights.It is main scarce that this experimental technique exists
Falling into is that required experimental cost is higher, and required experimental site is bigger and required experimenter is more.Additionally, experimental result is easily by sky
Gas condition affects, and repeatability is poor, and cannot obtain the droplet characteristics of motion in space in real time.
Fig. 2 is to study the schematic diagram of the wind tunnel experiment of droplet drift during fixed wing airplane dispenser in prior art.As
Shown in Fig. 2, due to the limitation of field experiment, people have developed again wind tunnel experiment to study float of mist droplet problem.Wind tunnel experiment
Being effectively supporting and supplementing of field experiment, for its relative field experiment, have boundary condition controlled, repeatability is high, experiment
The advantages such as means are various.But time, the many float of mist droplet problems produced for single shower nozzle of current wind tunnel experiment are studied, and nothing
Fixed wing airplane vortex movement is simulated by method, and the experimental technique used also is similar to field experiment, it is impossible to obtain instantaneous
The droplet characteristics of motion.
As a whole, during the research fixed wing airplane dispenser that presently, there are, the means of float of mist droplet problem, all exist
It is difficult to simulate Live Flying trailing vortex flow field, the defect not enough to droplet characteristics of motion research, and majority of case is simply to enter
The droplet amount statistics of row space fixed position, is difficult to recognize float of mist droplet problem from the movement mechanism of flow field and droplet itself.
Therefore, the spraying optimization method possessing Controlling model cannot be provided aborning, scientific research cannot deeply be grasped flow field and mist
Drip the dependency relation of motion.
Summary of the invention
It is an object of the invention to provide a kind of testing equipment for studying droplet drift and the process for this equipment
Method.Described equipment is moved by the vortex movement under simulation full-scale condition and droplet, and combines two phase flow experiment analytical method,
The impact of complicated wind field environment can not only be got rid of, but also the relevant pass obtaining droplet drift to vortex movement can be analyzed
System, the research for the float of mist droplet problem during aerial pesticide provides theoretical direction.
To achieve these goals, the present invention provides a kind of testing equipment for studying droplet drift.Described equipment bag
Include:
Towing trailing vortex generating means on described slide block of guide rail, the slide block being arranged on described towing guide rail, carry and
Motor that droplet generating means is connected with described slide block and PIV system,
Under the effect of the pulling force produced at described motor, described slide block in preset speed along described towing slide,
And drive described trailing vortex generating means to produce the trailing vortex comprising trace particle and described droplet generating means generation droplet；
Described PIV system, for capturing described trailing vortex and described droplet at fixing exhibition moving image in plane, and root
Process according to described moving image and obtain droplet drift and vortex movement rule over time, and according to droplet drift and trailing vortex
The law-analysing over time that moves obtains the dependency relation of droplet drift and vortex movement.
Alternatively, described equipment also includes:
Truss, for the support as described towing guide rail, fixing described towing guide rail.
Alternatively, the material of described truss and described towing guide rail is aluminium alloy or No. 45 steel.
Alternatively, described trailing vortex generating means uses dimensional airfoil or three-dimensional aerofoil profile,
Correspondingly, described trailing vortex generating means, for producing the standard two comprising trace particle under the drive of described slide block
Dimension flows to vortex pair.
Alternatively, described equipment also includes:
There is the tailplane of the negative angle of attack, be arranged at the afterbody of described trailing vortex generating means, for dissipating or weakening described
The trailing vortex that trailing vortex generating means produces.
Alternatively, described droplet generating means includes:
Water pump, the water tank being connected with described water pump and the shower nozzle being connected with described water pump,
Described water pump, for providing power to promote the water in described water tank to be ejected by shower nozzle.
Alternatively, described shower nozzle includes pressure nozzle or ultrasonic atomizatio shower nozzle.
Alternatively, described equipment also includes:
Spring, is arranged at one end of described towing guide rail, for, in the case of described slide block movement to described spring, subtracting
The movement velocity of slow described slide block so that described slide block is static.
Correspondingly, the present invention also provides for a kind of processing method for testing equipment, and described testing equipment includes:
Towing trailing vortex generating means on described slide block of guide rail, the slide block being arranged on described towing guide rail, carry and
Droplet generating means and the motor being connected with described slide block,
Under the effect of the pulling force produced at described motor, described slide block in preset speed along described towing slide,
And drive described trailing vortex generating means to produce the trailing vortex comprising trace particle and described droplet generating means generation droplet,
Described method includes:
Capture described trailing vortex and described droplet at fixing exhibition moving image in plane；
Process according to described moving image and obtain droplet drift and vortex movement rule over time；And
The phase of droplet drift and vortex movement is obtained according to droplet drift and vortex movement law-analysing over time
Pass relation.
Alternatively, described according to described moving image process obtain droplet drift advise over time with vortex movement
Rule, including:
Described moving image is carried out the process that is separated, is only comprised the first image of described droplet drift and only comprise
Second image of described vortex movement；
The speed calculation that described first image uses PTV single-point follow particle, obtains described droplet and drifts about in time
Changing Pattern；
Use PIV space velocity field to calculate described second image, obtain described vortex movement rule over time.
By technique scheme, carry trailing vortex generating means and droplet generating means on slide block, simulate full-scale condition
Under vortex movement and droplet motion, and capture trailing vortex and droplet at fixing exhibition moving image in plane, and according to motion
Image procossing obtains droplet drift and vortex movement rule over time, and drifts about with vortex movement in time according to droplet
Analysis on change obtain droplet drift and the dependency relation of vortex movement, the shadow of complicated wind field environment can not only be got rid of
Ring, but also the dependency relation obtaining droplet drift with vortex movement can be analyzed, for the float of mist droplet during aerial pesticide
The research of problem provides theoretical direction.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described.It should be evident that the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these figures.
Fig. 1 is to study droplet drift and the field experiment of deposition effect during fixed wing airplane dispenser in prior art
Schematic diagram；
Fig. 2 is to study the schematic diagram of the wind tunnel experiment of droplet drift during fixed wing airplane dispenser in prior art；
Fig. 3 is the structural representation of the testing equipment for studying droplet drift that one embodiment of the invention provides；
Fig. 4 is the flow chart of the processing method for testing equipment that one embodiment of the invention provides；
Fig. 5 is the schematic diagram of the phase separation step of the processing method that one embodiment of the invention provides.
Description of reference numerals
1 towing guide rail 2 slide block 3 trailing vortex generating means 4 droplet generating means
5 motor 6 PIV system 7 truss 8 tailplane 9 springs
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Fig. 3 is the structural representation of the testing equipment for studying droplet drift that one embodiment of the invention provides.Such as Fig. 3
Shown in, what one embodiment of the invention provided includes for studying the testing equipment of droplet drift: towing guide rail 1, be arranged in described
Pull the slide block 2 on guide rail 1, the carry trailing vortex generating means 3 on described slide block 2 and droplet generating means 4 and described slide block
2 motor 5 and PIV (Particle Image Velocimetry, the particle image velocimetry) systems 6 connected, at described motor 5
Under the effect of the pulling force produced, described slide block slides along described towing guide rail 1 in preset speed, and drives described trailing vortex to occur
Device 3 produces the trailing vortex comprising trace particle and described droplet generating means 4 produces droplet；Described PIV system 6, is used for capturing
Described trailing vortex and described droplet are at fixing exhibition moving image in plane, and process according to described moving image and obtain droplet drift
Move and vortex movement rule over time, and obtain with vortex movement law-analysing over time according to droplet drift
Droplet drift and the dependency relation of vortex movement.
Wherein, described motor 5 is connected with described slide block 2, according to slide block 5 described in described motor 5 scalable by cable wire
The speed of service.Additionally, sowed trace particle in the region at testing equipment place.Therefore, the tail that trailing vortex generating means 3 produces
Whirlpool comprises trace particle.
Preferably, described equipment also includes: truss 7, and for the support as described towing guide rail, fixing described towing is led
Rail.Thereby, towing guide rail can be fixedly secured.In another preferred implementation of the present invention, also can use rope suspension formula
Described towing guide rail is fixedly secured.Embodiments of the present invention are not restricted to this, as long as so that towing guide rail is fixedly secured
All embodiments for target are the most applicable.In the present embodiment, the material of described truss 7 and described towing guide rail 1 is aluminum
Alloy or No. 45 steel, a length of 20m of truss, width is 1.2m, and height is 1.6m.The size dimension of truss can be according to laboratory
The concrete condition in place adjusts, and preferentially ensures length direction.
Alternatively, described trailing vortex generating means 3 uses dimensional airfoil or three-dimensional aerofoil profile.Correspondingly, described trailing vortex fills
Put 3, flow to vortex pair for producing the quasi-two dimension comprising trace particle under the drive of described slide block.Wherein, described dimensional airfoil
For NACA0012 aerofoil profile or other classical aerofoil profiles, and the angle of attack of described dimensional airfoil is variable.Three-dimensional aerofoil profile is that general fixed-wing flies
The scale model of machine wing section.
Preferably, described equipment also includes: have the tailplane 8 of the negative angle of attack, is arranged at described trailing vortex generating means 3
Afterbody, for dissipating or weakening the trailing vortex that described trailing vortex generating means produces.Thereby, trailing vortex structure not only can be optimized, but also
The scheme that trailing vortex weakens can be studied
In a particular embodiment, described droplet generating means 4 includes: water pump, the water tank being connected with described water pump with
And the shower nozzle being connected with described water pump, described water pump, for providing power to promote the water in described water tank to be ejected by shower nozzle
Come.Wherein, described shower nozzle includes pressure nozzle or ultrasonic atomizatio shower nozzle.The structural core of described droplet generating means 4 is by water
Pump, water tank and shower nozzle and slide block 2 integrate integrated design, jointly at towing moving on rails.
Preferably, described equipment also includes: spring 9, is arranged at one end of described towing guide rail 1, at described slide block
In the case of moving to described spring, slow down the movement velocity of described slide block so that described slide block is static.Thereby, can avoid sliding
Block directly clashes into guide rail end surface or falls down from towing guide rail.
Preferably, described equipment also includes: sheet laser, for illuminating the shooting area of described PIV system.Thereby, PIV system
System can capture moving image clearly.
In concrete application, described PIV system 6 processes according to described moving image and obtains droplet drift and vortex movement
Rule over time, including: described moving image is carried out the process that is separated, is only comprised the of the drift of described droplet
One image and only comprise the second image of described vortex movement；Described first image is used PTV (Particle Tracing
Velocimetry, Particle tracking tests the speed) single-point follows the speed calculation of particle, and obtain described droplet and drift about over time
Rule；Use PIV space velocity field to calculate described second image, obtain described vortex movement rule over time.
The present embodiment is by carry trailing vortex generating means and droplet generating means on slide block, the tail under simulation full-scale condition
Whirlpool motion and droplet move, and capture trailing vortex and droplet at fixing exhibition moving image in plane, and according to moving image at
Reason obtains droplet drift and vortex movement rule over time, and drifts about with vortex movement over time according to droplet
Law-analysing obtains the dependency relation of droplet drift and vortex movement, can not only get rid of the impact of complicated wind field environment, and
The dependency relation obtaining droplet drift with vortex movement can also be analyzed, for grinding of the float of mist droplet problem during aerial pesticide
Offer theoretical direction is provided.
Fig. 4 is the flow chart of the processing method for testing equipment that one embodiment of the invention provides.As shown in Figure 4, originally
The processing method for testing equipment that inventing an embodiment provides includes:
In step S101, capture described trailing vortex and described droplet at fixing exhibition moving image in plane.
Wherein, described moving image includes gas phase trace particle (trailing vortex) and the motion of liquid phase particle (droplet).
Then, in step s 102, process according to described moving image and obtain droplet drift with vortex movement in time
Changing Pattern.
Specifically, this step includes: described moving image carries out the process that is separated, and is only comprised the drift of described droplet
The first image and only comprise the second image of described vortex movement；PTV single-point is used to follow particle described first image
Speed calculation, obtains described droplet and drifts about rule over time；Described second image is used PIV space velocity field meter
Calculate, obtain described vortex movement rule over time.
Fig. 5 is the schematic diagram of the phase separation step of the processing method that one embodiment of the invention provides.As it is shown in figure 5, to former
Beginning image (moving image) carries out the process that is separated, and obtains moving image and the liquid phase particle of gas phase trace particle (trailing vortex)
The moving image of (droplet).The moving image of gas phase trace particle carries out PIV space velocity field calculate, obtain overall wind field with
The Changing Pattern of time.The moving image of liquid phase particle is carried out PTV single-point and follows the speed calculation of particle, obtain single droplet
Drift velocity rule over time.
Finally, in step s 103, droplet is obtained according to droplet drift with vortex movement law-analysing over time
Drift and the dependency relation of vortex movement.
Wherein, the testing equipment involved by described processing method includes: pulls guide rail, be arranged on described towing guide rail
Trailing vortex generating means on described slide block of slide block, carry and droplet generating means and the motor being connected with described slide block,
Under the effect of the pulling force that described motor produces, described slide block is in preset speed along described towing slide, and drives described
Trailing vortex generating means produces the trailing vortex comprising trace particle and described droplet generating means produces droplet.
Due to the fact that and be simulated from the physical essence of agricultural aviation dispenser process, simulate agricultural boat from details
Present in empty dispenser process, the factor such as quasi-two-dimensional symmetric vortex movement, droplet motion, therefore has the strongest scientific research and reality
Using value.In true operation process, after fixed wing airplane flies over, its trailing vortex can continue to rotate, and constantly motion and dissipation reach
Tens of seconds time, the present invention can simulate this process completely, after slide block is by measuring plane, still can open in this plane
Exhibition Experiments of Optics means, it is thus achieved that real-time trailing vortex and the droplet characteristics of motion.This equipment can also be by changing towed speed and tail
The profile of whirlpool generating means, obtains the trailing vortex of varying strength, even dissipates trailing vortex and be optimized.Flying height, ground effect
Should wait and can also be realized by regulation towing guide rail distance ground level.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality
Execute the detail in mode, in the technology concept of the present invention, technical scheme can be carried out multiple letter
Monotropic type, these simple variant belong to protection scope of the present invention.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, at not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to various can
The compound mode of energy illustrates the most separately.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as it is without prejudice to this
The thought of invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. the testing equipment being used for studying droplet drift, it is characterised in that described equipment includes: pull guide rail, be arranged in
Trailing vortex generating means on described slide block of slide block on described towing guide rail, carry and droplet generating means and described slide block
The motor connected and PIV system,
Under the effect of the pulling force produced at described motor, described slide block is in preset speed along described towing slide, and carries
Dynamic described trailing vortex generating means produces the trailing vortex comprising trace particle and described droplet generating means produces droplet；
Described PIV system, for capturing described trailing vortex and described droplet at fixing exhibition moving image in plane, and according to institute
State moving image process and obtain droplet drift and vortex movement rule over time, and according to droplet drift and vortex movement
Law-analysing obtains the dependency relation of droplet drift and vortex movement over time.
Testing equipment for studying droplet drift the most according to claim 1, it is characterised in that described equipment also wraps
Include:
Truss, for the support as described towing guide rail, fixing described towing guide rail.
Testing equipment for studying droplet drift the most according to claim 2, it is characterised in that described truss and described
The material of towing guide rail is aluminium alloy or No. 45 steel.
Testing equipment for studying droplet drift the most according to claim 1, it is characterised in that described trailing vortex fills
Put employing dimensional airfoil or three-dimensional aerofoil profile,
Correspondingly, described trailing vortex generating means, for producing the quasi-two-dimensional flow comprising trace particle under the drive of described slide block
To vortex pair.
Testing equipment for studying droplet drift the most according to claim 1, it is characterised in that described equipment also wraps
Include:
There is the tailplane of the negative angle of attack, be arranged at the afterbody of described trailing vortex generating means, be used for dissipating or weaken described trailing vortex
The trailing vortex that generating means produces.
Testing equipment for studying droplet drift the most according to claim 1, it is characterised in that described droplet fills
Put and include:
Water pump, the water tank being connected with described water pump and the shower nozzle being connected with described water pump,
Described water pump, for providing power to promote the water in described water tank to be ejected by shower nozzle.
Testing equipment for studying droplet drift the most according to claim 6, it is characterised in that described shower nozzle includes pressure
Power shower nozzle or ultrasonic atomizatio shower nozzle.
Testing equipment for studying droplet drift the most according to claim 1, it is characterised in that described equipment also wraps
Include:
Spring, is arranged at one end of described towing guide rail, for, in the case of described slide block movement to described spring, slowing down institute
State the movement velocity of slide block so that described slide block is static.
9. for the processing method according to the testing equipment described in any one claim in claim 1-8, described
Testing equipment includes:
Pull guide rail, the slide block being arranged on described towing guide rail, the carry trailing vortex generating means on described slide block and droplet
Generating means and the motor being connected with described slide block,
Under the effect of the pulling force produced at described motor, described slide block is in preset speed along described towing slide, and carries
Dynamic described trailing vortex generating means produces the trailing vortex comprising trace particle and described droplet generating means produces droplet,
It is characterized in that, described method includes:
Capture described trailing vortex and described droplet at fixing exhibition moving image in plane；
Process according to described moving image and obtain droplet drift and vortex movement rule over time；And
Obtain the relevant pass of droplet drift and vortex movement to vortex movement law-analysing over time according to droplet drift
System.
Processing method the most according to claim 9, it is characterised in that described process according to described moving image obtains mist
Drip drift and vortex movement rule over time, including:
Described moving image is carried out the process that is separated, is only comprised the first image of described droplet drift and only comprise described
Second image of vortex movement；
The speed calculation that described first image uses PTV single-point follow particle, obtains described droplet and drifts about over time
Rule；
Use PIV space velocity field to calculate described second image, obtain described vortex movement rule over time.
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| CN106895871A (en) * | 2017-03-15 | 2017-06-27 | 湖南农业大学 | For the testing stand of plant protection aircraft atomization quality detection |
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| CN109131927A (en) * | 2018-08-16 | 2019-01-04 | 贵州大学 | A kind of experimental rig for simulating aerial pesticide |
| CN109323845A (en) * | 2018-10-27 | 2019-02-12 | 河南农业大学 | Droplet generating device based on high-speed imaging technology |
| CN110006614A (en) * | 2019-02-01 | 2019-07-12 | 北京农业智能装备技术研究中心 | A kind of monitoring system and method for aerial pesticide medical fluid droplet cloud cluster drift trend in aerial pesticide |
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| WO2020027759A1 (en) * | 2018-07-30 | 2020-02-06 | Ataturk Universitesi Bilimsel Arastirma Projeleri Birimi | Pulverization simulator |
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| CN107290127A (en) * | 2017-06-09 | 2017-10-24 | 华南农业大学 | The visualization device and control method of a kind of rotor wing unmanned aerial vehicle spray |
| CN107290127B (en) * | 2017-06-09 | 2019-06-28 | 华南农业大学 | The visualization device and control method of a kind of rotor wing unmanned aerial vehicle spray field |
| WO2020027759A1 (en) * | 2018-07-30 | 2020-02-06 | Ataturk Universitesi Bilimsel Arastirma Projeleri Birimi | Pulverization simulator |
| CN109131927A (en) * | 2018-08-16 | 2019-01-04 | 贵州大学 | A kind of experimental rig for simulating aerial pesticide |
| CN109323845A (en) * | 2018-10-27 | 2019-02-12 | 河南农业大学 | Droplet generating device based on high-speed imaging technology |
| CN110006614A (en) * | 2019-02-01 | 2019-07-12 | 北京农业智能装备技术研究中心 | A kind of monitoring system and method for aerial pesticide medical fluid droplet cloud cluster drift trend in aerial pesticide |
| CN110702365A (en) * | 2019-10-30 | 2020-01-17 | 北京农业智能装备技术研究中心 | Atomization efficiency evaluation system and method |
| CN110702365B (en) * | 2019-10-30 | 2021-08-03 | 北京农业智能装备技术研究中心 | Atomization efficiency evaluation system and method |
| US11761836B2 (en) | 2019-10-30 | 2023-09-19 | Beijing Research Center Of Intelligent Equipment For Agriculture | System and method for evaluating atomization efficiency of wind-driven atomizer |
| CN111060276A (en) * | 2019-11-29 | 2020-04-24 | 北京农业智能装备技术研究中心 | Grading method and testing device for agricultural spray head drift performance |
| CN111044247A (en) * | 2019-11-29 | 2020-04-21 | 北京农业智能装备技术研究中心 | Pesticide fog droplet drift testing arrangement |
| CN111521366A (en) * | 2020-05-08 | 2020-08-11 | 上海机电工程研究所 | Flow display device applied to trailing vortex of control surface of supersonic rotary aircraft |
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