CN112193417A - Automatic broadcasting device for rotor unmanned aerial vehicle - Google Patents
Automatic broadcasting device for rotor unmanned aerial vehicle Download PDFInfo
- Publication number
- CN112193417A CN112193417A CN202011008747.3A CN202011008747A CN112193417A CN 112193417 A CN112193417 A CN 112193417A CN 202011008747 A CN202011008747 A CN 202011008747A CN 112193417 A CN112193417 A CN 112193417A
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- broadcasting
- material bin
- plate
- main shaft
- cavity
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- 239000000463 material Substances 0.000 claims abstract description 124
- 238000003756 stirring Methods 0.000 claims abstract description 23
- 238000009331 sowing Methods 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 230000005484 gravity Effects 0.000 claims abstract description 6
- 230000009471 action Effects 0.000 claims abstract description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 239000004917 carbon fiber Substances 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- -1 polyethylene Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 235000007164 Oryza sativa Nutrition 0.000 abstract description 8
- 235000009566 rice Nutrition 0.000 abstract description 8
- 241000209140 Triticum Species 0.000 abstract description 6
- 235000021307 Triticum Nutrition 0.000 abstract description 6
- 239000003337 fertilizer Substances 0.000 abstract description 6
- 239000007787 solid Substances 0.000 abstract description 6
- 238000012856 packing Methods 0.000 abstract description 2
- 240000007594 Oryza sativa Species 0.000 abstract 1
- 241000209094 Oryza Species 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 206010017577 Gait disturbance Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D1/00—Dropping, ejecting, releasing, or receiving articles, liquids, or the like, in flight
- B64D1/16—Dropping or releasing powdered, liquid, or gaseous matter, e.g. for fire-fighting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/04—Helicopters
- B64C27/08—Helicopters with two or more rotors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U10/00—Type of UAV
- B64U10/10—Rotorcrafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64U—UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
- B64U2101/00—UAVs specially adapted for particular uses or applications
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Remote Sensing (AREA)
- Fertilizing (AREA)
Abstract
The invention discloses an automatic broadcasting device for a rotor unmanned aerial vehicle, which comprises a direct current motor, a motor transmission shaft, a stirring bar, a main shaft, a screw feeder, a broadcasting disc, a material bin cover plate and the like, wherein the whole broadcasting device is arranged below the rotor unmanned aerial vehicle. When the device is used for broadcasting, the direct current motor drives the main shaft, the packing auger, the broadcasting disc and other components to rotate at a high speed, materials are stored in the upper cavity of the material bin, slide to the lower cavity of the material bin along the inner wall of the upper cavity of the material bin under the action of gravity and are conveyed to the inside of the broadcasting disc by the rotating auger, and then are uniformly thrown out along the circumferential direction by the rotating broadcasting disc, so that the aim of uniform broadcasting is fulfilled. The invention can quickly adjust the sowing speed by changing the rotating speed of the motor, has the characteristics of simple and reliable structure, difficult blockage, uniform sowing, convenient operation and the like, and is particularly suitable for sowing rice and wheat seeds and solid fertilizers.
Description
Technical Field
The invention relates to an automatic broadcasting device for a rotor wing unmanned aerial vehicle, belongs to the field of agricultural machinery, and particularly relates to agricultural aviation machinery suitable for quick and efficient broadcasting operation of rice and wheat seeds and solid fertilizers.
Background
The traditional spraying mode of rice and wheat seeds and solid fertilizer mainly adopts manual broadcasting, but the efficiency of the manual broadcasting mode is extremely low, the labor intensity is high, meanwhile, ground broadcasting machinery is gradually applied and popularized, but the ground broadcasting machinery has the defects of low operation speed, seedling rolling and the like in the environments of deep mud feet of a rice field and the like.
The development of agricultural aviation technology provides an innovative platform for rice and wheat planting and solid fertilizer broadcasting, and by means of the characteristics of efficient flight and intelligent control of the rotor unmanned aerial vehicle, the invention designs the automatic broadcasting device of the rotor unmanned aerial vehicle, which can realize efficient broadcasting operation, has the characteristics of simplicity, reliability, easiness in regulation and control, high operation speed, no influence by terrain and landform and the like, and expands the application range of agricultural aviation industry.
Patent CN104176254B discloses an airborne device suitable for unmanned aerial vehicle broadcast operation and broadcast method. The airborne device comprises a material box, a material stirring mechanism, a discharging adjusting mechanism and a material spreading mechanism. This machine carries device has designed more mechanism of mutually supporting and different functions, and a plurality of mechanisms are through a plurality of motor drive, and power consumptive more, and structure and operation are complicacy, and the cost is higher, is unfavorable for rotor unmanned aerial vehicle's continuation work.
Patent CN106416530A discloses a material broadcasting device and method that agricultural unmanned aerial vehicle carried. The device includes material case, fan, air current reposition of redundant personnel case and guiding device, and it is mainly through arranging material wheel and fan air current drive material removal, broadcasting, and the device structure is complicated, contains a plurality of fans, and overall structure is asymmetric, is unfavorable for rotor unmanned aerial vehicle's steady work, and adjusting device receives the fan air current to influence great.
Compared with the above patent, the invention designs and adopts the broadcasting device and the method which have simple structure and convenient adjustment. The materials are driven to move in the material bin by means of gravity and the packing auger, and are broadcast by means of centrifugal force generated by high-speed rotation of the broadcast tray, and the damage degree of the materials can be effectively reduced in the process. This device overall structure broadcasts is the axisymmetric shape, and the focus influences little to rotor unmanned aerial vehicle under rotor unmanned aerial vehicle, and it still has simple structure and good reliability's characteristics simultaneously. The sowing device can realize uniform sowing of materials, the sowing speed can be quickly adjusted through the rotating speed of the motor, the adjusting method is simple, and the operation is flexible.
Disclosure of Invention
The technical problems solved by the invention are as follows: at present, rice and wheat planting and solid fertilizer broadcasting modes mainly adopt two modes of manual operation and ground broadcasting machinery, wherein the manual broadcasting mode is low in working efficiency, uneven in broadcasting and high in labor intensity, and the ground broadcasting machinery has the problems of difficulty in walking, low speed, seedling rolling and the like in the rice field environment. Aiming at the problems, the invention designs the automatic broadcasting device on the rotor unmanned aerial vehicle platform, the device realizes the conveying and broadcasting of the materials through the material gravity, the auger conveying and the high-speed rotating centrifugal force, and has the characteristics of simple and reliable structure, easy regulation and control, high operation speed, difficult blockage and the like.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a rotor unmanned aerial vehicle is with automatic device of broadcasting, the device comprises direct current motor, motor support, motor drive shaft, stirring strip, main shaft, screw feeder, bottom nut, broadcast dish, guide plate, material storehouse, annular elastic gasket, material storehouse apron and charge door, rotor unmanned aerial vehicle is with automatic device fixed mounting that broadcasts in the rotor unmanned aerial vehicle below, and the device totality is the axisymmetric structure, has guaranteed rotor unmanned aerial vehicle flight system's stationarity. The device adopts direct current motor as power component, motor support fixed mounting is under rotor unmanned aerial vehicle, direct current motor then fixed mounting is inside the motor support, the motor drive shaft direction is down, and from last to being connected with the main shaft down in proper order, the auger is connected with the dish of broadcasting, the main shaft is fixed in on the motor drive shaft through threaded connection, the main shaft is in proper order from the material storehouse, the auger passes with the centre bore of broadcasting the dish, direct current motor passes through motor drive shaft and drives the main shaft, the stirring strip, the screw feeder and broadcast dish synchronous revolution.
The material bin is positioned under the direct current motor, the material bin cover plate is fixed at the lower end of the motor support, meanwhile, the material bin cover plate and the material bin are connected through an annular elastic gasket and a bolt, and the material bin cover plate is provided with a feed inlet. The material bin is divided into a material bin upper cavity and a material bin lower cavity from top to bottom, the material bin upper cavity is of a bowl-shaped structure with an upward opening, a straight blade type guide plate is arranged on the inner wall of the material bin upper cavity, the material bin lower cavity is of a circular tube-shaped structure, the opening at the lower end of the material bin lower cavity is gradually reduced from top to bottom, and the opening at the lower end of the material bin lower cavity is positioned right above the opening at the upper end of the broadcast sowing plate. The screw conveyor is positioned in the lower cavity of the material bin and is fixed on the main shaft.
The broadcast sowing plate is fixed at the top end of the main shaft through a bottom nut and is positioned below the lower cavity of the material bin. The broadcasting plate is composed of a broadcasting plate cover plate, a long guide plate, a broadcasting plate bottom plate and a short guide plate, the broadcasting plate cover plate and the broadcasting plate bottom plate are of axisymmetric disc structures with upward warping outer edges, the long guide plate and the short guide plate are fixed between the broadcasting plate cover plate and the broadcasting plate bottom plate in a welding mode, and the long guide plate and the short guide plate are of radial bending blade structures and are arranged in a staggered mode along the circumferential direction of the broadcasting plate cover plate and the broadcasting plate bottom plate.
The stirring strip is in a strip shape and is arranged along the radial direction of the main shaft, the stirring strip is fixedly connected with the main shaft and synchronously rotates along with the main shaft, so that the materials are prevented from being bonded and blocked in the cavity of the material bin, and the material of the stirring strip is nylon, polyethylene or carbon fiber.
When the device carries out broadcast sowing work, a material is placed into the material bin through the feeding port, the direct current motor drives the main shaft, the stirring bar, the auger and the broadcast sowing disc to synchronously rotate through the motor transmission shaft, the material slides to the lower cavity of the material bin along the inner wall of the upper cavity of the material bin under the action of the self gravity of the material and the rotary conveying of the auger, and enters the broadcast sowing disc through the lower end opening of the lower cavity of the material bin and the upper end opening of the broadcast sowing disc. Inside broadcasting the dish, the material can produce certain centrifugal force under the high-speed rotatory effect of broadcasting a dish apron, short deflector, long deflector and broadcasting a dish bottom plate, and simultaneously under the guide of long deflector and short deflector, the material evenly spills out along broadcasting the radial of dish to realized the high-speed broadcasting of material, the rotational speed of direct current motor is adjusted to the accessible simultaneously, thereby changes the material and broadcasts speed.
The invention has the beneficial effects that: the automatic broadcasting device for the rotor unmanned aerial vehicle has the characteristics of simple structure, stable operation and difficulty in blocking, the material broadcasting speed can be adjusted through the rotating speed of the motor, the adjusting method is simple, the device is flexible to operate, the intelligent and quick operation requirements of the rotor unmanned aerial vehicle can be met, and the automatic broadcasting device is suitable for the agricultural aviation fields of quick and efficient broadcasting of wheat, rice, solid granular fertilizer and the like.
Drawings
The invention is further described with reference to the following figures and detailed description:
fig. 1 is a block diagram of an automatic broadcasting device for a rotary-wing unmanned aerial vehicle;
FIG. 2 is a schematic view of a material bin;
fig. 3 is a structural view of the broadcast disk.
In the figure: 1. the rotor unmanned aerial vehicle comprises a rotor unmanned aerial vehicle body, 2. a direct current motor, 3. a motor bracket, 4. a motor transmission shaft, 5. a stirring bar, 6. a main shaft, 7. an auger, 8. a bottom nut, 9. a broadcasting plate, 10. a guide plate, 11. a material bin, 12. an annular elastic gasket, 13. a material bin cover plate, 14. a charging opening, 15. a material bin upper cavity, 16. a material bin lower cavity, 17. a material bin lower cavity lower end opening, 18. a broadcasting plate upper end opening, 19. a broadcasting plate cover plate, 20. a long guide plate, 21. a broadcasting plate bottom plate and 22. a short guide plate.
Detailed Description
Fig. 1, fig. 2 and fig. 3 have determined this automatic device of broadcasting for unmanned gyroplane jointly, and the device embodiment comprises dc motor 2, motor support 3, motor drive shaft 4, stirring strip 5, main shaft 6, screw feeder 7, bottom nut 8, broadcast dish 9, guide plate 10, material storehouse 11, annular elastic gasket 12, material storehouse apron 13 and charge door 14 etc. and whole device is located unmanned gyroplane 1 under. Wherein, motor bracket 3 is fixed under rotor unmanned aerial vehicle 1, and direct current motor 2 is fixed inside motor bracket 3, and 4 directions of motor drive shaft are down. The material bin cover plate 13 is fixed at the lower end of the motor support 3 and is connected with the material bin 11 through an annular elastic gasket 12 and a bolt, and a circular hole-shaped feeding opening 14 is formed in the material bin cover plate 13. The main shaft 6 is fixed on the motor transmission shaft 4 through threaded connection, the main shaft 6 sequentially penetrates through center holes of the material bin 11, the auger 7 and the broadcasting plate 9, the auger 7 is positioned in the lower cavity 16 of the material bin and fixed on the main shaft 6, and the broadcasting plate 9 is fixed at the top end of the main shaft 6 through a bottom nut 8 and positioned below the lower cavity 16 of the material bin.
The material bin 11 is arranged below the direct current motor 2, the whole material bin 11 is of an axisymmetric structure, the material bin 11 comprises two parts, namely an upper material bin cavity 15 and a lower material bin cavity 16 from top to bottom, the lower end of the upper material bin cavity 15 is communicated with the lower material bin cavity 16, the upper material bin cavity 15 is of a bowl-shaped structure with an upward opening, a straight blade type guide plate 10 is arranged on the inner wall of the bowl-shaped structure, the lower material bin cavity 16 is of a circular tubular structure, the lower end opening 17 of the lower material bin cavity is gradually reduced from top to bottom, and the lower end opening 17 of the lower material bin cavity is positioned right above the upper end opening 18 of.
The broadcasting plate 9 is composed of a broadcasting plate cover plate 19, a long guide plate 20, a broadcasting plate bottom plate 21 and a short guide plate 22, the broadcasting plate cover plate 19 and the broadcasting plate bottom plate 21 are both of axisymmetric disc structures with upward warping outer edges, the long guide plate 20 and the short guide plate 22 are fixed between the broadcasting plate cover plate 19 and the broadcasting plate bottom plate 21 in a welding mode, and the long guide plate 20 and the short guide plate 22 are both of radial bent blade structures and are arranged in a staggered mode along the circumferential direction of the broadcasting plate cover plate 19 and the broadcasting plate bottom plate 21.
Direct current motor 2 drives main shaft 6 through motor drive shaft 4, stirring strip 5, screw feeder 7 and broadcast dish 9 synchronous revolution, stirring strip 5 sets up the inside at material storehouse epicoele 15, and fix on main shaft 6, stirring strip 5 is the rectangular form, it radially arranges along main shaft 6, stirring strip 5 and main shaft 6 synchronous revolution, stirring strip 5 adopts nylon, polyethylene or carbon fiber manufacturing, motor support 3, motor drive shaft 4, main shaft 6, screw feeder 7, bottom nut 8, broadcast dish 9 and guide plate 10 adopt carbon steel or stainless steel to make, material storehouse 11 adopts polyethylene or carbon fiber manufacturing. Through the rotation of stirring strip 5, can prevent the bonding of material in material storehouse epicoele 15 inside and block up.
In the material broadcasting process, the material is stored in the material bin 11, the direct current motor 2 drives the main shaft 6, the stirring bar 5, the auger 7 and the broadcasting plate 9 to synchronously rotate through the motor transmission shaft 4, and under the action of the self gravity of the material and the rotary conveying of the auger 7, the material slides to the lower cavity 16 of the material bin along the inner wall of the upper cavity 15 of the material bin and enters the broadcasting plate 9 through the lower end opening 17 of the lower cavity of the material bin and the upper end opening 18 of the broadcasting plate. Inside broadcast sowing dish 9, the material can produce certain centrifugal force under the high-speed rotatory effect of broadcast sowing dish apron 15, short deflector 16, long deflector 17 and broadcast sowing dish bottom plate 18, simultaneously under the guide of long deflector 20 and short deflector 22, the material is evenly broadcast out along broadcast sowing dish 9's radial to realized the high-speed broadcast sowing of material, the accessible is adjusted the rotational speed of DC motor 2 simultaneously, thereby changes material broadcast sowing speed.
Claims (5)
1. The utility model provides a rotor unmanned aerial vehicle is with automatic device of broadcasting, rotor unmanned aerial vehicle is with automatic device fixed mounting that broadcasts is in rotor unmanned aerial vehicle below, be the axisymmetric structure, a serial communication port, the device includes direct current motor, motor support, motor drive shaft, the main shaft, the screw feeder, broadcast the dish, material storehouse and material storehouse apron, motor support fixed mounting is under rotor unmanned aerial vehicle, direct current motor then fixed mounting is inside motor support, the motor drive shaft direction is down, and from last to being connected with the main shaft down in proper order, the screw feeder is connected with broadcast the dish, the main shaft is fixed in on the motor drive shaft through threaded connection, the main shaft is in proper order from material storehouse, the screw feeder passes with the centre bore of broadcasting the dish, direct current motor drives the main shaft through motor drive shaft, the stirring bar, the screw feeder and broadcast dish synchronous revolution.
2. The automatic broadcasting device for the rotorcraft according to claim 1, wherein the material bin is located right below the dc motor, the material bin cover plate is fixed to the lower end of the motor bracket, and the material bin cover plate and the material bin are connected through an annular elastic gasket and a bolt, and the material bin cover plate is provided with a feed inlet; the material bin is divided into two parts, namely an upper material bin cavity and a lower material bin cavity, from top to bottom, the upper material bin cavity is of a bowl-shaped structure with an upward opening, a straight blade type guide plate is arranged on the inner wall of the upper material bin cavity, the lower material bin cavity is of a circular tubular structure, the lower end opening of the lower material bin cavity is gradually reduced from top to bottom, and the lower end opening of the lower material bin cavity is positioned right above the opening at the upper end of the broadcast sowing plate; the screw conveyor is positioned in the lower cavity of the material bin and is fixed on the main shaft.
3. The automatic broadcasting device for the rotor unmanned aerial vehicle according to claim 1, wherein the broadcasting disc is fixed at the top end of the main shaft through a bottom nut and is positioned below the lower cavity of the material bin; the broadcasting plate is composed of a broadcasting plate cover plate, a long guide plate, a broadcasting plate bottom plate and a short guide plate, the broadcasting plate cover plate and the broadcasting plate bottom plate are of axisymmetric disc structures with upward warping outer edges, the long guide plate and the short guide plate are fixed between the broadcasting plate cover plate and the broadcasting plate bottom plate in a welding mode, and the long guide plate and the short guide plate are of radial bending blade structures and are arranged in a staggered mode along the circumferential direction of the broadcasting plate cover plate and the broadcasting plate bottom plate.
4. The automatic broadcasting device for the rotor wing unmanned aerial vehicle according to claim 1, further comprising a stirring bar, wherein the stirring bar is in a strip shape and is arranged along the radial direction of the main shaft, the stirring bar is fixedly connected with the main shaft and synchronously rotates along with the main shaft, so that the materials are prevented from being bonded and blocked in the cavity of the material bin, and the material of the stirring bar is nylon, polyethylene or carbon fiber.
5. The automatic broadcasting device for the unmanned rotorcraft according to claim 1, wherein when the device is used for broadcasting, the material is put into the material bin through the feed inlet, the direct current motor drives the main shaft, the stirring bar, the auger and the broadcasting plate to synchronously rotate through the motor transmission shaft, and under the action of the self gravity of the material and the rotation and the transmission of the auger, the material slides to the lower cavity of the material bin along the inner wall of the upper cavity of the material bin and enters the broadcasting plate through the lower end opening of the lower cavity of the material bin and the upper end opening of the broadcasting plate; inside broadcasting the dish, the material can produce certain centrifugal force under the high-speed rotatory effect of broadcasting a dish apron, short deflector, long deflector and broadcasting a dish bottom plate, and simultaneously under the guide of long deflector and short deflector, the material evenly spills out along broadcasting the radial of dish to realized the high-speed broadcasting of material, the rotational speed of direct current motor is adjusted to the accessible simultaneously, thereby changes the material and broadcasts speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011008747.3A CN112193417A (en) | 2020-09-23 | 2020-09-23 | Automatic broadcasting device for rotor unmanned aerial vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011008747.3A CN112193417A (en) | 2020-09-23 | 2020-09-23 | Automatic broadcasting device for rotor unmanned aerial vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112193417A true CN112193417A (en) | 2021-01-08 |
Family
ID=74016091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011008747.3A Withdrawn CN112193417A (en) | 2020-09-23 | 2020-09-23 | Automatic broadcasting device for rotor unmanned aerial vehicle |
Country Status (1)
| Country | Link |
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| CN (1) | CN112193417A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114946646A (en) * | 2022-05-27 | 2022-08-30 | 山东金惠种业有限公司 | Use unmanned aerial vehicle to carry out supplementary pollination device of hybrid wheat |
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| CA2870924A1 (en) * | 2013-11-14 | 2015-05-14 | Neil Anderson | Combined auger and screening apparatus for screening and conveyance of granular fertilizer or the like |
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| US20190037828A1 (en) * | 2016-02-02 | 2019-02-07 | Chandler Bennett | Method and Apparatus Used for Biological Control of Agricultural Pests |
| CN109383803A (en) * | 2018-10-09 | 2019-02-26 | 成都戎创航空科技有限公司 | A kind of unmanned plane for sowing |
| CN109729800A (en) * | 2018-11-21 | 2019-05-10 | 华南农业大学 | A kind of particle scattering mechanism based on unmanned plane |
| US20200137948A1 (en) * | 2017-10-31 | 2020-05-07 | SZ DJI Technology Co., Ltd. | Material detecting mechanism of sowing machine, sowing machine, and unmanned aerial vehicle for protecting plants |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102128174A (en) * | 2011-04-02 | 2011-07-20 | 山东大学 | Spiral-flow type blockage-free energy-efficient centrifugal fan |
| CA2870924A1 (en) * | 2013-11-14 | 2015-05-14 | Neil Anderson | Combined auger and screening apparatus for screening and conveyance of granular fertilizer or the like |
| CN103661946A (en) * | 2013-12-13 | 2014-03-26 | 江苏大学 | Flow diversion anti-drifting devices for rotary-wing unmanned plane mist spraying |
| CN104255136A (en) * | 2014-09-06 | 2015-01-07 | 卢仁华 | Hand pushing type automatic spreading sowing machine |
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| CN109383803A (en) * | 2018-10-09 | 2019-02-26 | 成都戎创航空科技有限公司 | A kind of unmanned plane for sowing |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210108 |
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| WW01 | Invention patent application withdrawn after publication |