CN107764578B - Negative pressure air suction device of rotor wing plant protection unmanned aerial vehicle spray performance test bed and control method thereof - Google Patents
Negative pressure air suction device of rotor wing plant protection unmanned aerial vehicle spray performance test bed and control method thereof Download PDFInfo
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- CN107764578B CN107764578B CN201711173573.4A CN201711173573A CN107764578B CN 107764578 B CN107764578 B CN 107764578B CN 201711173573 A CN201711173573 A CN 201711173573A CN 107764578 B CN107764578 B CN 107764578B
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- 239000007921 spray Substances 0.000 title claims abstract description 26
- 238000011056 performance test Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 12
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 17
- 230000008021 deposition Effects 0.000 claims abstract description 16
- 239000003595 mist Substances 0.000 claims description 25
- 230000000694 effects Effects 0.000 claims description 7
- 238000012937 correction Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 abstract description 7
- 238000000151 deposition Methods 0.000 description 13
- 239000011159 matrix material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000009423 ventilation Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- -1 polysiloxane Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920006268 silicone film Polymers 0.000 description 1
Classifications
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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
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Catching Or Destruction (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
The invention discloses a negative pressure air suction device of a rotor wing plant protection unmanned aerial vehicle spray performance test bed, which comprises: the fixed bracket is of a frame type structure and is used for fixing the rotor unmanned aerial vehicle; a plurality of cup negative pressure deposition droplet devices, it sets up the fixed bolster below includes: a droplet receptacle; the bone plate is a bearing plate with a plurality of round holes and is arranged at the bottom of the fog drop receiver; a waterproof breathable film coated on the top of the bone plate; the fan is arranged below the bone plate; the cup type negative pressure fogdrop accumulation device forms a circular or square array, and a control method of a negative pressure air suction device of a rotor wing plant protection unmanned aerial vehicle spray performance test bed is also disclosed.
Description
Technical Field
The invention relates to the field of plant protection unmanned aerial vehicles, in particular to a negative pressure air suction device of a spray performance test bed of a rotor wing plant protection unmanned aerial vehicle and a control method of the negative pressure air suction device of the spray performance test bed of the rotor wing plant protection unmanned aerial vehicle.
Background
At present, gyroplane is emerging plant protection apparatus, because gyroplane pushes down the wind field and makes fog drop penetration enhancement, but also because the wind field that gyroplane produced makes traditional spraying performance test bench unable satisfying the survey of spraying volume distribution homogeneity. Because the fogdrops of the gyroplane on the test bed fall on the square cup type fog quantity receiver or the V or U-shaped fog accumulation groove to generate ground effect, partial fogdrops can change along with the movement track of the airflow, and the test result is difficult to reflect the actual fogdrop deposition distribution.
Disclosure of Invention
The invention designs and develops a negative pressure air suction device of a rotor wing plant protection unmanned aerial vehicle spray performance test bed, which is used for mainly reducing and avoiding the ground effect of a rotor wing machine generated in a square cup type mist quantity receiver or a V-shaped mist accumulation groove.
The invention also designs and develops a control method of the negative pressure air suction device of the rotor wing plant protection unmanned aerial vehicle spray performance test bed, and the test result is closer to the actual distribution of fog drops by correcting the rotating speed of the fan.
The technical scheme provided by the invention is as follows:
negative pressure induced draft device of rotor plant protection unmanned aerial vehicle spray performance test bench includes:
the fixed bracket is of a frame type structure and is used for fixing the rotor unmanned aerial vehicle;
a plurality of cup-type negative pressure deposition droplet devices, it sets up the fixed bolster below, cup-type negative pressure deposition droplet device includes:
a droplet receptacle;
the bone plate is a bearing plate with a plurality of round holes and is arranged at the bottom of the fog drop receiver;
a waterproof breathable film coated on the top of the bone plate;
the fan is arranged below the bone plate;
wherein, the cup type negative pressure fogdrop accumulation device forms a circular or square array.
Preferably, the mist drip receiver is a cylindrical barrel or a square cylindrical barrel with openings at the upper end and the lower end.
Preferably, the air duct is arranged between the fan and the bone plate.
Preferably, the bone plate is disposed at one end of the air duct through a rubber gasket to increase the air tightness of the device.
Preferably, the waterproof breathable film is a polysiloxane film.
Preferably, the cup type negative pressure mist deposition device further comprises a wind speed sensor, wherein the wind speed sensor is arranged at the top of the cup type negative pressure mist deposition device.
Negative pressure induced draft device of rotor plant protection unmanned aerial vehicle spray performance test bench includes:
the fixed bracket is of a frame type structure and is used for fixing the rotor unmanned aerial vehicle;
negative pressure induced draft device of rotor plant protection unmanned aerial vehicle spray performance test bench includes:
the fixed bracket is of a frame type structure and is used for fixing the rotor unmanned aerial vehicle;
the V-shaped groove framework has a plurality of continuous V-shaped or U-shaped grooves on the top surface, a plurality of ventilation round holes on the top, a waterproof ventilation film on the top,
a plurality of air duct units supported below the V-shaped skeleton;
the fans are arranged at the bottom of the air duct;
wherein, a plurality of wind channel units constitute square array.
Preferably, the wind speed sensor is arranged at the top of the V-shaped or U-shaped groove framework, and is directly above the air channel unit.
A control method of a negative pressure air suction device of a rotor wing plant protection unmanned aerial vehicle spray performance test bed comprises the following steps:
starting the rotor wing unmanned aerial vehicle to spray, wherein the rotation speed of the rotor wing is v x ；
The wind speed sensor detects the wind speed v at the corresponding position y The weighing sensor detects the weight M of the mist drops collected at the corresponding position iz Wherein i=1, 2 … a; z=1, 2 … b; a is the number of the transverse cup type negative pressure fogdrop accumulating devices, b is the number of the longitudinal cup type negative pressure fogdrop accumulating devices;
turning on the blower at a rotation speed v f Rotate, the rotating speed of the fan is v f ＝-v y To eliminate the ground effect influence of the rotor unmanned aerial vehicle.
Preferably, the method further comprises: correcting the rotating speed of the fan, wherein the correction formula is as follows:
wherein Q is 1 Summing the weights of the fog drops collected by the Z-column cup type negative pressure fog drop collecting device,Q 2 for summing the weight of the mist collected by the ith transverse cup type negative pressure mist-collecting device,/->Sigma is the variance of the droplet weight data collected by the cup-type negative pressure droplet deposition apparatus.
The beneficial effects of the invention are that
The invention designs and develops a negative pressure air suction device of a rotor wing plant protection unmanned aerial vehicle spray performance test bed, which is used for mainly reducing and avoiding the ground effect of a rotor wing machine generated in a square cup type mist quantity receiver or a V or U-shaped mist accumulation groove. The control method of the negative pressure air suction device of the rotor wing plant protection unmanned aerial vehicle spray performance test bed is designed and developed, and the test result is closer to the actual distribution of fog drops by correcting the rotating speed of the fan. By adopting a matrix wind speed measuring instrument, the measuring instrument can depict a down-pressing wind field of the gyroplane; the data tested by the matrix wind speed measuring instrument is transmitted to the controller, and the revolution of each matrix negative pressure fan is controlled through operation, so that the air suction quantity is controlled.
Drawings
Fig. 1 is a schematic structural diagram of a negative pressure air suction device of a spray performance test bed of a rotor plant protection unmanned aerial vehicle.
Fig. 2 is a schematic structural diagram of the cup-type negative pressure mist droplet deposition device according to the present invention.
Fig. 3 is a schematic structural view of the mist drip receptacle according to the present invention.
Fig. 4 is an enlarged schematic view of the mist drip catcher according to the present invention.
Fig. 5 is a schematic view of a bone plate according to the present invention.
Fig. 6 is a schematic structural diagram of another embodiment of a negative pressure air suction device of a spray performance test stand of a rotor plant protection unmanned aerial vehicle according to the present invention.
Fig. 7 is a schematic structural diagram of another embodiment of the negative pressure mist droplet deposition apparatus according to the present invention.
Fig. 8 is a schematic structural view of a V-groove skeleton according to the present invention.
Fig. 9 is a schematic structural diagram of an air duct unit according to the present invention.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
As shown in fig. 1, the negative pressure air suction device for the spray performance test of the wing plant protection unmanned aerial vehicle provided by the invention comprises: a fixed support 110, a rotor plant protection unmanned aerial vehicle 120 and a plurality of cup-type negative pressure fogdrop accumulation devices 130.
As shown in fig. 2-5, the fixing bracket 110 is a frame structure for fixing the rotary wing unmanned aerial vehicle; a plurality of cup-type negative pressure fogdrop depositing devices 130 are disposed below the fixing bracket, and the cup-type negative pressure fogdrop depositing devices 130 include: a mist receiver 131; a bone plate 132, which is a support plate having a plurality of round holes, provided at the bottom of the mist receiver; a waterproof and breathable membrane wrapped over the top of bone plate 132; the fan is arranged below the bone plate 132; wherein the cup-type negative pressure mist droplet deposition device 130 is formed into a circular or square array.
Preferably, the mist eliminator 131 is a cylindrical tube or a square cylindrical tube having both upper and lower ends open.
In another embodiment, the air duct 133 is arranged between the fan 135 and the bone plate 132, and the air speed sensor 134 is arranged at the top of the cup type negative pressure mist droplet deposition device.
As shown in fig. 4, a bone plate 132 is provided at one end of the air duct by a rubber grommet 137 to increase the air tightness of the device. As a preferred embodiment, the waterproof breathable film is a silicone film.
As shown in fig. 5-9, in another embodiment, a negative pressure suction device of a spray performance test stand of a rotor plant protection unmanned aerial vehicle includes: the fixing bracket 210 is a frame structure and is used for fixing the rotor unmanned aerial vehicle; the V or U-shaped channel frame 220 has a plurality of continuous V or U-shaped channels 250 on the top surface thereof, and has a ventilation circular hole, and a waterproof and ventilation membrane on the top; a plurality of air duct units 230 supported below the V-shaped skeleton; a plurality of fans 260 disposed at the bottom of the air duct; the wind channel units form a square array, the wind speed sensors 240 are arranged at the top of the V-shaped groove framework, and the transverse distance between every two adjacent wind speed sensors is 8-15cm and the longitudinal distance between every two adjacent wind speed sensors is 8-15cm.
A control method of a negative pressure air suction device of a rotor wing plant protection unmanned aerial vehicle spray performance test bed comprises the following steps:
starting the rotor wing unmanned aerial vehicle to spray, wherein the rotation speed of the rotor wing is v x ；
The wind speed sensor detects the wind speed v at the corresponding position y The weighing sensor detects the weight M of the mist drops collected at the corresponding position iz Wherein i=1, 2 … a; z=1, 2 … b; a is the number of the transverse cup type negative pressure fogdrop accumulating devices, b is the number of the longitudinal cup type negative pressure fogdrop accumulating devices;
turning on the blower at a rotation speed v f Rotate, the rotating speed of the fan is v f ＝-v y To eliminate the ground effect influence of the rotor unmanned aerial vehicle.
Preferably, the method further comprises: correcting the rotating speed of the fan, wherein the correction formula is as follows:
wherein Q is 1 Summing the weights of the fog drops collected by the Z-column cup type negative pressure fog drop collecting device,Q 2 for summing the weight of the mist collected by the ith transverse cup type negative pressure mist-collecting device,/->Sigma is the variance of the droplet weight data collected by the cup-type negative pressure droplet deposition apparatus.
The invention designs and develops a negative pressure air suction device of a rotor wing plant protection unmanned aerial vehicle spray performance test bed, which is used for mainly reducing and avoiding the ground effect of a rotor wing machine generated in a square cup type mist quantity receiver or a V-shaped mist accumulation groove. The control method of the negative pressure air suction device of the rotor wing plant protection unmanned aerial vehicle spray performance test bed is designed and developed, and the test result is closer to the actual distribution of fog drops by correcting the rotating speed of the fan. By adopting a matrix wind speed measuring instrument, the measuring instrument can depict a down-pressing wind field of the gyroplane; the data tested by the matrix wind speed measuring instrument is transmitted to the controller, and the revolution of each matrix negative pressure fan is controlled through operation, so that the air suction quantity is controlled.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (1)
1. A control method of a negative pressure air suction device of a rotor wing plant protection unmanned aerial vehicle spray performance test bed, which is characterized in that,
use rotor plant protection unmanned aerial vehicle spray performance test bench negative pressure device that induced drafts, include:
the fixed bracket is of a frame type structure and is used for fixing the rotor unmanned aerial vehicle;
a plurality of cup-type negative pressure deposition droplet devices, it sets up the fixed bolster below, cup-type negative pressure deposition droplet device includes:
a droplet receptacle;
the bone plate is a bearing plate with a plurality of round holes and is arranged at the bottom of the fog drop receiver;
a waterproof breathable film coated on the top of the bone plate;
the fan is arranged below the bone plate;
wherein the cup-type negative pressure mist droplet deposition device forms a circular or square array;
comprising the following steps:
starting the rotor wing unmanned aerial vehicle to spray,the rotating speed of the rotor wing is v x ；
The wind speed sensor detects the wind speed v at the corresponding position y The weighing sensor detects the weight M of the mist drops collected at the corresponding position iz Wherein i=1, 2 … a; z=1, 2 … b; a is the number of the transverse cup type negative pressure fogdrop accumulating devices, b is the number of the longitudinal cup type negative pressure fogdrop accumulating devices;
turning on the blower at a rotation speed v f Rotate, the rotating speed of the fan is v f ＝-v y To eliminate the ground effect influence of the rotor unmanned aerial vehicle;
further comprises: correcting the rotating speed of the fan, wherein the correction formula is as follows:
wherein Q is 1 Summing the weights of the fog drops collected by the Z-column cup type negative pressure fog drop collecting device,Q 2 for summing the weight of the mist collected by the ith transverse cup type negative pressure mist-collecting device,/->Sigma is the variance of the droplet weight data collected by the cup-type negative pressure droplet deposition apparatus.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711173573.4A CN107764578B (en) | 2017-11-22 | 2017-11-22 | Negative pressure air suction device of rotor wing plant protection unmanned aerial vehicle spray performance test bed and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711173573.4A CN107764578B (en) | 2017-11-22 | 2017-11-22 | Negative pressure air suction device of rotor wing plant protection unmanned aerial vehicle spray performance test bed and control method thereof |
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| CN107764578A CN107764578A (en) | 2018-03-06 |
| CN107764578B true CN107764578B (en) | 2024-03-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108562521B (en) * | 2018-06-27 | 2024-04-26 | 河南农业大学 | Plant protection unmanned aerial vehicle spraying performance detection test bed |
| CN109813521B (en) * | 2019-01-28 | 2024-04-05 | 河南农业大学 | Plant protection unmanned aerial vehicle wind field detection device |
| CN110836841B (en) * | 2019-11-28 | 2021-02-12 | 河南农业大学 | Gantry crane type plant protection unmanned aerial vehicle fog drop test bench |
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