JP2018000109A - Fluid dispersion instrument of unmanned flying body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid dispersion instrument of an unmanned flying body capable of powerfully dispersing misty fluid such as an agricultural chemical jetted from a nozzle downward, and dispersing the fluid such as an agricultural chemical to farm crops as uniformly as possible, while achieving weight saving of the unmanned flying body.SOLUTION: By carrying out agricultural chemical dispersion using an unmanned flying body 1, the problem that agricultural chemical dispersion time and dispersion place are restricted is eliminated. In the meanwhile, the downwash by rotors 5A-5D of the unmanned flying body 1 becomes weak as compared with the downwash by a main rotor of an unmanned helicopter, but a straightened flow of high flow velocity can be generated below flow straightening members 13A-13D by the arrangement of the flow straightening members 13A-13D above nozzles 11A-11D in the downwash. In consequence, the agricultural chemical and the like can be powerfully dispersed downward from the nozzles 11A-11D.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fluid spraying device for an unmanned aerial vehicle, and is disposed below the rotor of the unmanned aerial vehicle and above the nozzle, so that the nozzle periphery is utilized by using a downwash, natural wind, or the like due to the rotation of the rotor. The present invention relates to a fluid spraying device for an unmanned air vehicle that generates rectifications that are collected in a downward direction.

  The following helicopters are known as unmanned helicopters for spraying chemical solutions such as conventional agricultural chemicals. As shown in FIG. 5A, the unmanned helicopter 100 flies by rotating the main rotor 103 and the tail rotor 104 by the engine 102 mounted in the fuselage 101, and the operator performs radio control on the ground. It is steered by operating a device (not shown).

  A pair of front and rear support legs 106 and 107 and a pair of left and right payload bars 108 and 109 are attached to the lower part of the body frame 105 of the helicopter 100, and a chemical solution spraying device 110 for spraying chemical solutions such as agricultural chemicals is mounted. ing.

  As shown in FIG. 5B, the chemical liquid spraying device 110 mainly includes a pair of left and right chemical liquid tanks 111 and 112, a chemical liquid pump (not shown) for discharging the chemical liquid from the chemical liquid tanks 111 and 112, and the chemical liquid. The nozzles 113, 114, and 115 are dispersed below the nozzle 101 at a predetermined injection angle (see, for example, Patent Document 1).

  The following multicopters are known as conventional unmanned multicopters for aerial photography. As shown in FIG. 6, the unmanned multicopter 120 is mainly arranged in a cylindrical body 121, fixed above the body 121, and radially extending from the center of the body so as to be perpendicular to each other. And arm units 122, 123, 124, and 125, and rotor units 126, 127, 128, and 129 attached to the tips of the arms 122 to 125, respectively.

  In the body portion 121, for example, an arithmetic control device (not shown), a battery, a posture sensor such as a gyroscope, a camera, and the like are housed. The frames of the multicopter 120 such as the arms 122 to 125 are made of a light and high-strength material such as carbon fiber reinforced plastic (CFRP), titanium alloy, or aluminum alloy (for example, Patent Document 2). reference.).

  In addition, the following extendable herbicide spray covers are known as conventional herbicide spray covers. As shown in FIG. 7, the herbicide spray cover 140 mainly includes a cover main body 141, storage holding means 142, and attachment means 144 for attaching to the nozzle 143.

  The cover main body 141 includes a fixed taper cylinder 145 and three movable taper cylinders 146, 147, and 148. The fixed taper cylinder 145 and the movable taper cylinders 146 to 148 are sequentially increased from the inside toward the outside. It is arranged concentrically. When the herbicide is spread over a wide range, the cover main body 141 is stored in the cover storage body 149 and used in a state of being fixed by the storage holding means 142 as indicated by a one-dot chain line. On the other hand, when spraying the herbicide locally, as shown by a solid line, the cover body 141 is used in an extended state (see, for example, Patent Document 3).

JP 2009-269493 A JP 2014-227016 A Japanese Patent No. 493281

  As shown in FIGS. 5 (A) and 5 (B), in the spraying of the chemical solution using the conventional unmanned helicopter 100, the fuselage 100 of the helicopter 100 is large and its weight is heavy. There was a problem that the work of putting the helicopter 100 on a truck or the like and the work of unloading were heavy labor. Further, since the helicopter 100 flies by rotating the main rotor 103 and the tail rotor 104 by a large engine 102 such as 400 cc, for example, the sound during the flight is loud, and from the viewpoint of noise problems, the spraying location and spraying of the chemical solution There was a problem that time was constrained.

  Further, in the helicopter 100, the nozzles 113 to 115 are disposed below the rotation region of the main rotor 103, and chemicals are sprayed on the crops below the body 101 using the downwash by the main rotor 103. Then, the crop is greatly shaken by the downwash, so that the chemical solution adheres to the entire crop including the back side of the crop. On the other hand, depending on the crops, there is a problem that the downwash by the main rotor 103 is too strong, causing it to break or fall down. Moreover, when the spraying place of the chemical solution is narrow, there is a problem that the chemical solution is sprayed to a peripheral region where the chemical solution is not required to be sprayed due to the excessively strong downwash.

  Furthermore, the helicopter 100 has a high selling price per aircraft. For example, if there is no response to requesting purchase from a local government or use of a subsidy from the local government, the helicopter 100 is used by each farmer. There was a problem that it was difficult to purchase. And if the local government cannot secure the budget, the farmers have to enter the fields and spray chemicals such as pesticides as usual, and the spraying of chemicals is a heavy labor, There was a problem that it was difficult to spray the chemical solution uniformly. In particular, in recent years, the aging of farmers is progressing, and how to efficiently perform heavy labor such as spraying chemicals has become a big problem.

  In order to solve the problems caused by using the above-described helicopter 100, in recent years, a method of spraying a chemical using an unmanned multicopter 120 as shown in FIG. 6 has been studied and performed experimentally. In the chemical solution spraying method using the multicopter 120, as in the case of using the helicopter 100, it is required how to uniformly spray the chemical solution over a wide range of crops.

  As shown in FIG. 6, the multicopter 120 flies by driving a plurality of rotor units 126 to 129 with a battery, but the individual rotors 130, 131, 132, and 133 are helicopters 100 (see FIG. 5A). ) Is smaller than the main rotor 103 (see FIG. 5A), and the power of the downwash by the rotors 130 to 133 is also weaker than the downwash by the main rotor 103. Therefore, the chemical liquid ejected from the nozzle is likely to be affected by the natural wind during the flight of the multicopter 120 or the head wind generated by the flight of the multicopter 120 itself. And a part of mist-like chemical | medical solution injected from the nozzle flows laterally before reaching a farm product, and rolls up by the upward airflow of a downwash. As a result, in the method of spraying the chemical solution using the multicopter 120, it is difficult to control the spraying of a desired amount of the chemical solution to a desired location, and it is difficult to uniformly apply the chemical solution to the crop. That is, there is a need for a spraying method for allowing the chemicals sprayed from the nozzles to flow below the multicopter 120 and directly reach the crops in the downwash flow by the rotors 130 to 133.

  In order to solve the above-mentioned problem of the influence of the wind when spraying the chemical solution, the herbicide spray cover 140 as shown in FIG. 7 is attached to the multicopter 120 (see FIG. 6), and the chemical solution sprayed from the nozzle reaches the crop. It is also possible to make it easier. However, flying the multicopter 120 with the herbicide spray cover 140 attached makes it difficult for the multicopter 120 to maintain a stable flight state and may hinder safe flight of the multicopter 120. Furthermore, the downwash by the rotors 130 to 133 may enter the inside of the opening of the herbicide spray cover 140 and the chemicals sprayed from the nozzles may not be sprayed uniformly on the crops.

  In addition, since the multicopter 120 is mounted with a battery, a chemical tank filled with a chemical, or the like, the multicopter 120 is designed to reduce the weight of the aircraft as much as possible and to fly for a long time, but the herbicide spray cover 140 described above. Wearing is not a preferred measure because it increases the total weight of the aircraft.

  The present invention has been made in view of the above circumstances, and is located below the rotor of the unmanned air vehicle, above the nozzle, and around the nozzle using downwash or natural wind caused by the rotation of the rotor. The present invention relates to a fluid spraying device for an unmanned aerial vehicle that vigorously sprays fluid ejected from a nozzle downward by collecting and generating rectification directed downward.

  In the unmanned air vehicle fluid spraying device of the present invention, the unmanned air vehicle fluid used when spraying the fluid in the fluid storage tank mounted on the unmanned air vehicle through the nozzles mounted on the unmanned air vehicle. A spraying device having a flow straightening member for straightening downwash generated by rotation of a rotor of the unmanned air vehicle, wherein the flow straightening member is in the downwash and is disposed above the nozzle; It is characterized by.

  In the unmanned air vehicle fluid distribution device of the present invention, the rectifying member has a streamlined surface from the rotor side toward the nozzle side, and the rectifying member is disposed below a rotation region of the rotor. It is characterized by.

  In the unmanned air vehicle fluid distribution device of the present invention, the streamlined surface of the rectifying member includes at least a first curved surface located on the rotor side and a second curved surface located on the nozzle side. And the curvature of the first curved surface is larger than the curvature of the second curved surface, and a boundary region between the first curved surface and the second curved surface is located on the rotor side.

  Further, in the unmanned air vehicle fluid distribution device of the present invention, the rectifying member is formed with an attachment surface of the nozzle on an end portion side of the second curved surface, and the nozzle is rectified via the attachment surface. The nozzle is detachably attached below the member, and the nozzle is disposed on the inner side of the streamlined surface of the rectifying member.

  In the unmanned air vehicle fluid spraying instrument of the present invention, the rectifying member on which the second curved surface is arranged has a width that decreases toward the mounting surface.

  In the unmanned air vehicle fluid spraying device of the present invention, the rectifying member is disposed in the downwash generated by the rotation of the rotor of the unmanned air vehicle, and the nozzle is disposed below the rectifying member. With this structure, rectification with a flow velocity faster than that of the downwash is generated below the rectifying member, and a mist-like fluid such as agricultural chemicals ejected from the nozzle is vigorously dispersed toward the lower side of the unmanned air vehicle. . And while preventing the enlargement of an electric pump and implement | achieving weight reduction of an unmanned air vehicle, fluids, such as an agrochemical, can be spread | dispersed as uniformly as possible to agricultural products.

  In the unmanned air vehicle fluid distribution device of the present invention, the rectifying member has a streamlined surface from the rotor side toward the nozzle side, and the rectifying member is disposed below the rotation region of the rotor. With this structure, downwash, natural wind, and the like are rectified by the rectifying member, and a mist-like fluid such as agricultural chemicals sprayed from the nozzle can be adhered to the crop as uniformly as possible.

  In the unmanned air vehicle fluid spraying device of the present invention, more downwash can be utilized by arranging the first curved surface having a large curvature above the rectifying member. Further, the flow rate of rectification can be increased by expanding the arrangement area of the second curved surface.

  In the unmanned air vehicle fluid spraying instrument of the present invention, the mist-like fluid sprayed from the nozzle is reliably put on the flow of rectification generated by the flow straightening member, so that the pesticide sprayed from the nozzle, etc. Can adhere to crops as uniformly as possible.

  Moreover, in the unmanned air vehicle fluid spraying instrument of the present invention, rectification can be reliably generated toward the lower side of the rectification member where the nozzle is disposed.

BRIEF DESCRIPTION OF THE DRAWINGS It is the (A) top view and (B) side view explaining the unmanned air vehicle which equips the instrument for fluid distribution of one Embodiment of this invention. It is the (A) side view and (B) side view explaining the instrument for fluid distribution of one embodiment of the present invention. It is (A) schematic and (B) side view explaining the condition which is spraying the fluid of one Embodiment of this invention. It is a modification of one embodiment of the present invention, (A) a top view for explaining an unmanned air vehicle equipped with a fluid spraying device, (B) a side view, and (C) a side surface for explaining a fluid spraying device. FIG. It is (A) side view and (B) side view explaining the conventional unmanned helicopter for agricultural chemical spraying. It is a top view explaining the conventional multicopter. It is principal part sectional drawing explaining the conventional herbicide spreading cover.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an unmanned air vehicle fluid spraying apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings. In the description of the embodiment, the same reference numerals are used for the same members in principle, and repeated descriptions are omitted.

  FIG. 1A is a top view for explaining an unmanned aerial vehicle 1 equipped with the fluid spraying device of this embodiment, and FIG. 1B is a side view for explaining the unmanned aerial vehicle 1 shown in FIG. FIG. FIG. 2A is a side view illustrating the fluid spraying device of the present embodiment, and FIG. 2B is a side view illustrating the usage state of the fluid spraying device of the present embodiment. FIG. 3A is a schematic diagram for explaining a fluid spraying situation using the unmanned air vehicle 1 of the present embodiment, and FIG. 3B is a diagram for explaining a fluid spraying situation using the unmanned air vehicle 1 of the present embodiment. FIG.

  As shown in FIG. 1A, an unmanned air vehicle 1 mainly includes a main body 2 and four arms 3A, 3B, 3C, and 3D that are arranged in a substantially cross shape from the main body 2 in plan view. The rotor drive units 4A, 4B, 4C, and 4D disposed at the distal ends of the respective arms 3A to 3D, and the rotors 5A, 5B, 5C, and 5D disposed on the upper surfaces of the respective rotor drive units 4A to 4D. And a storage frame 6 which is disposed below the main body 2 and mounts a fluid storage tank 8 (see FIG. 1B). The main body 2 is covered with a helmet-type cover member 7 in order to prevent the sprayed agricultural chemicals, water, chemicals and other fluids and dust from adhering to the flight control device, the battery, etc. . The storage frame 6 also serves as a support leg when the unmanned air vehicle 1 is detached.

  Unmanned aerial vehicle 1 flies by unmanned remote operation without entering a person, and is photographed in places where manned aircraft are difficult to enter, such as disaster areas, active volcanoes, radioactively contaminated areas, conflict areas, etc. It is possible to collect various information. In the present embodiment, the unmanned aerial vehicle 1 is used as a means for spraying agricultural chemicals or the like from the air to farm fields.

  In addition, as the unmanned air vehicle 1, for example, a quadcopter (using four rotors), a hexacopter (using six rotors), an octocopter (eight rotors) in which four or more rotors (rotary blades) are arranged at symmetrical positions. In this embodiment, a case where a quadcopter is used as the unmanned air vehicle 1 will be described. However, the present invention is limited to this case. It is not something. Further, even in the case of a helicopter equipped with a small engine, the noise is smaller and the power of downwash is weaker than that of a helicopter equipped with a conventional large engine, and can be used as an object of this embodiment.

  The main body 2, arms 3 </ b> A to 3 </ b> D, rotors 5 </ b> A to 5 </ b> D, and the storage frame 6 are made of, for example, carbon fiber reinforced plastic (CFRP), titanium in order to reduce the weight and increase the strength of the unmanned air vehicle 1. Alloys and aluminum alloys are used.

  The main body 2 is formed in the central region of the unmanned air vehicle 1 and is covered with a cover member 7 and is not shown. However, the main body 2 includes communication means, various sensors such as an acceleration sensor, GPS positioning means, a flight route, etc. A flight control device composed of storage means or the like is arranged, and the flight attitude, flight route, etc. of the unmanned air vehicle 1 are controlled by remote control or automatic control. Further, a battery (not shown) corresponding to the flight time of the unmanned air vehicle 1 is mounted on the main body unit 2 and used as a drive source for the unmanned air vehicle 1. In order to reduce the weight of the unmanned aerial vehicle 1, the number of batteries mounted is appropriately adjusted according to the flight time and the like.

  The arms 3A to 3D are respectively fixed to the main body portion 2 and arranged so that the arms 3A to 3D are perpendicular to each other. Rotor drive units 4A to 4D are disposed at the distal ends of the arms 3A to 3D, respectively. The rotor driving units 4A to 4D mainly have an electric motor (not shown) that rotates the rotors 5A to 5D, and the rotors 5A to 5D are pivotally supported on the rotation shaft of the electric motor, respectively. Then, the number of rotations of the rotors 5A to 5D is controlled by the flight control device, and the unmanned air vehicle 1 can rise and fall, and can fly in the front-rear direction and the left-right direction.

  As shown in FIG. 1 (B), a fluid storage tank 8 is fixed to the storage frame 6 below the main body 2 of the unmanned air vehicle 1 by a belt or the like. In the fluid storage tank 8, for example, agricultural chemicals, water, Fluids such as drugs are stored. In the following description, the fluid is described as an agrochemical, but is not limited to an agrochemical. An electric pump 9 is attached to the side surface of the fluid storage tank 8, and when spraying agricultural chemicals on agricultural products, the agricultural chemical in the fluid storage tank 8 is pumped out and pumped to the nozzles 11 </ b> A to 11 </ b> D via the pipe 10. doing. 1B is a side view, the nozzles 11C and 11D, the round bars 12C and 12D, and the rectifying members 13C and 13D are illustrated, but the nozzles 11A and 11B are also provided below the rotor driving units 4A and 4B. 11B, round bars 12A and 12B, and rectifying members 13A and 13B are attached.

  Jigs for attaching the nozzles 11A to 11D and the rectifying members 13A to 13D, for example, round bars 12A to 12D, are fixed to the lower surfaces of the rotor driving units 4A to 4D, respectively. The round bars 12A to 12D have, for example, a length that is about half of the length of the rotors 5A to 5D, and rectifying members 13A to 13D are fixed to the tip portions of the round bars 12A to 12D. The nozzles 11A to 11D are detachably attached to the rectifying members 13A to 13D. The nozzles 11 </ b> A to 11 </ b> D spray the agricultural chemicals pumped from the fluid storage tank 8 through the electric pump 9 in a mist form.

  Although details will be described later, the nozzles 11 </ b> A to 11 </ b> D and the rectifying members 13 </ b> A to 13 </ b> D are respectively disposed below the rotation regions W of the rotors 5 </ b> A to 5 </ b> D. When the unmanned air vehicle 1 flies, the rectifying members 13A to 13D collect down around the nozzles 11A to 11D and generate downward rectification using downwash or natural wind caused by the rotation of the rotors 5A to 5D.

  With this structure, the mist-like agricultural chemicals can be jetted downward from the nozzles 11A to 11D without taking measures such as increasing the size of the electric pump 9 or changing to the high-pressure electric pump. . That is, by avoiding an increase in the size of the electric pump 9, the flight time can be increased by reducing the weight of the unmanned air vehicle 1, and the application range of agricultural chemicals can be increased, thereby increasing the efficiency of work.

  As shown in FIG. 2A, the rectifying member 13A has, for example, an egg shape, and its bottom surface 18 is formed as a flat surface. As described above, the surface along the longitudinal direction of the rectifying member 13A is streamlined, and is formed of curved surfaces 14 and 15 having at least two curvatures like a main wing of an airplane. Specifically, the curved surface 14 of the region L1 from the upper end of the rectifying member 13A to 1/3 has a curvature R1, the curved surface 15 of the remaining region L2 has a curvature R2, and the curvature R1 is larger than the curvature R2. . In addition, although the ratio of each area | region L1 and L2 can change arbitrary designs, the rectification | straightening of a quick flow rate can be generated toward the downward direction of the rectification | straightening member 13A by lengthening the area | region L2.

  The rectifying member 13A is formed using, for example, a general synthetic resin or an epoxy resin, and is formed into a hollow shape. As shown in the figure, the upper curved surface 14 of the rectifying member 13A is formed with a hole 16 through which the round bar 12A is inserted and a hole 17 through which the tube 10 is inserted. The round bar 12A is substantially connected to the center line C of the rectifying member 13A. The straightening member 13A is inserted so as to be coaxial. The size of the hole 16 is slightly larger than that of the round bar 12A, the size of the hole 17 is slightly larger than that of the tube 10, and the downwash does not substantially flow into the rectifying member 13A. Yes.

  With this structure, the rectifying member 13A is securely fixed to the round bar 12A inside thereof, so that the downwash and the like can be reliably rectified. Further, the pipe 10 is not disposed on the streamlined surface of the rectifying member 13A, that is, the curved surfaces 14 and 15, and the periphery thereof, thereby preventing the wind flow around the rectifying member 13A from being adversely affected, and downwashing. Etc. can be reliably rectified. The tube 10 is connected to the nozzle 11A inside the rectifying member 13A.

  The straightening member 13A has a streamlined shape in the longitudinal direction over the entire circumference, and its bottom surface 18 is a flat surface for mounting the nozzle 11A. On the bottom surface 18 of the rectifying member 13A, an attachment mechanism (not shown) for detachably attaching the nozzle 11A, for example, a rotation holding type attachment mechanism is formed. With this structure, it is possible to select the nozzle 11 </ b> A capable of spraying a pesticide with a suitable particle size in the form of a mist in accordance with the crop to be sprayed with the pesticide.

  Furthermore, as illustrated, the nozzle 11A is attached to the bottom surface 18 so as to be located inside the curved surface 15 of the rectifying member 13A. The outer shape of the nozzle 11 </ b> A is also arranged so as not to come out of the curved surface 15. The curved surface 15 of the rectifying member 13A is a curved surface whose width becomes narrower toward the bottom surface 18 that is the mounting surface of the nozzle 11A. The nozzle 11A is attached to the rectifying member 13A so that the injection hole (not shown) of the nozzle 11A is substantially coaxial with the center line C of the rectifying member 13A.

  As shown in FIG. 2B, the rectifying member 13A is disposed below the rotation region W of the rotor 5A. The curved surface 14 of the rectifying member 13A has a wide shape as the curvature R1 increases, and the curved surface 14 and the downwash that blows down from above easily collide. As a result, a downwash that collides with the rectifying member 13A, a downwash that blows down the vicinity of the rectifying member 13A, and the like merge, and the merged downwash and the like flow along the streamlined surfaces (curved surfaces 14 and 15) of the rectifying member 13A. The flow is caused to flow under the flow straightening member 13A. Then, the generated rectification has a flow velocity faster than the downwash by the rotor 5A, and blows down to the lower side of the rectification member 13A.

  In other words, the nozzle 11A is disposed in the rectification generation region, and the mist-like agricultural chemical sprayed from the nozzle 11A is swept down downward by the rectification member 13A. Then, without increasing the discharge pressure by the large electric pump 9, sprayed agricultural chemicals can be sprayed to the crop side below the unmanned air vehicle 1 in the flow of downwash. As a result, the spraying amount of the agricultural chemical is stabilized, and it becomes possible to spray the agricultural chemical as uniformly as possible to the agricultural products in a wide range of spraying area. Further, the mist-like pesticide sprayed from the nozzle 11 </ b> A flows to the outside of the downwash flow before reaching the agricultural product, and the pesticide is prevented from being sprayed to the surrounding area where spraying is not necessary.

  Furthermore, there are natural winds and winds generated by the flight of the unmanned air vehicle 1 itself around the unmanned air vehicle 1 during flight. And natural wind and a head wind become a cross wind mainly with respect to the unmanned air vehicle 1, and there exists a possibility of driving the mist-like agricultural chemical injected from the nozzle 11A to the outer side of the flow of downwash. However, since the nozzle 11A is disposed below the rectifying member 13A, the natural wind or the head wind also collides with the rectifying member 13A, and serves to generate rectification below the rectifying member 13A. In other words, the rectifying member 13A can effectively use not only the downwash but also natural wind and head wind, and can attach the mist-like pesticide sprayed from the nozzle 11A to the farm products below accurately.

  Although the rectifying member 13A has been described, the rectifying members 13B to 13D have the same structure and the same effects can be obtained. Therefore, the description is omitted here with reference to the above description.

Next, with reference to FIG. 3A and FIG. 3B, a case will be described in which an unmanned air vehicle 1 sprays agricultural chemicals on a field of 1 ha (10000 m ² ), for example. As spraying conditions in this case, for example, the spraying amount of the agricultural chemical is 8 L, the spraying time is 8 minutes to 10 minutes, and the flying speed of the unmanned air vehicle 1 is 20 km / h.

  As shown in FIG. 3 (A), the nozzles 11A to 11D to be used are appropriately selected according to the crops to which the agricultural chemical is sprayed, but the unmanned air vehicle 1 has a spray width of about 5 m, and the unmanned air vehicle 1 flies back and forth 10 times. By doing so, the pesticide spraying is completed on the 1 ha field, and a very efficient pesticide spraying operation is realized.

  As shown in FIG. 3B, by attaching the rectifying members 13 </ b> A to 13 </ b> D to the unmanned aerial vehicle 1, the mist pesticide sprayed from the nozzles 11 </ b> A to 11 </ b> D is vigorously scattered below the unmanned air vehicle 1. The amount of the rotor 5A to 5D flowing out from the downwash flow in the lateral direction is greatly reduced. And the misty pesticide sprayed from the nozzles 11A to 11D adheres directly to the crops in the flow of the downwash of the rotors 5A to 5D, so that the unevenness of the pesticide spraying can be eliminated. Uniform spraying can be achieved for all crops.

  At this time, as shown in the figure, the dotted arrows indicate the downwash of the rotors 5A to 5D, but the downwash of the rotors 5A to 5D spreads in the lateral direction by reaching the agricultural products (not shown) or the ground. . And the solid line arrow shows the mist-like pesticide sprayed from the nozzles 11A to 11D, but the pesticide also diffuses in the lateral direction together with the downwash, so that the width of the unmanned air vehicle 1 exceeds the width as described above. Pesticide application width is realized. As a result, the agricultural product can be attached to the entire crop including the back side of the crop by swinging the crop greatly from side to side by downwash. In addition, the power of the downwash of the rotors 5A to 5D is weaker than the power of the downwash of the main rotor of the conventional helicopter, and the crops are prevented from being folded or overturned.

  Next, a modified example of the above-described embodiment will be described with reference to FIGS. 4 (A) to 4 (C). FIG. 4 (A) is a top view for explaining the unmanned air vehicle 1 equipped with the fluid spraying device, and FIG. 4 (B) is a side view for explaining the unmanned air vehicle 1 shown in FIG. 4 (A). FIG. 4C is a side view illustrating the fluid spraying device.

  In the embodiment shown in FIGS. 4A and 4B, the embodiment using FIGS. 1 to 3 is different from the embodiment using FIGS. 1 to 3 in the position where the round bars 21 and 22 are attached and the rectifying member 13 </ b> A with respect to the round bars 21 and 22. Although the position which fixes ~ 13D differs, the characteristic and effect of spraying fluids, such as agricultural chemicals using rectification members 13A-13D, are acquired similarly. Therefore, in the description of the embodiment of FIG. 4A and FIG. 4B, different portions will be described, and the other description will refer to the contents described with reference to FIGS. Omit.

  For example, as shown in FIG. 4A, the round bars 21 and 22 for fixing the rectifying members 13A to 13D and the nozzles 11A to 11D are fixed to the storage frame 6 and arranged horizontally from the storage frame 6. The straightening members 13 </ b> A to 13 </ b> D and the nozzles 11 </ b> A to 11 </ b> D may be arranged at regular intervals with respect to the bars 21 and 22.

  As illustrated, the round bar 21 is disposed between the rotation area W of the rotor 5A and the rotation area W of the rotor 5D, and the round bar 22 is disposed between the rotation area W of the rotor 5B and the rotation area W of the rotor 5C. It is arranged. The rotor 5A and the rotor 5D have a certain gap W1 so that they do not come into contact with each other during rotation. Then, the downwash blow-off generated from the rotors 5A and 5D cancels each other downward, so that the gap W1 between the rotors 5A and 5D is downwashed in the same manner as below the rotation region W of the rotors 5A and 5D. A downdraft is generated by. That is, the gap W1 between the rotors 5A and 5D can also achieve the same effect as that below the rotation region W of the rotors 5A and 5D. Similarly, in the gap W2 between the rotors 5B and 5C, as in the lower part of the rotation area W of the rotors 5B and 5C, the downflow due to the downwash is generated, and the same effect as the lower part of the rotation area W of the rotors 5B and 5C is obtained. Can be obtained.

  As shown in FIG. 4B, in the case of this structure, holes (not shown) through which the round bars 21 and 22 are inserted into the lateral surfaces of the rectifying members 13A to 13D, for example, the curved surface 15, and tubes are provided. An insertion hole (not shown) is formed. And rectification | straightening members 13A-13D are being firmly fixed with respect to the round bars 21 and 22 in the inside, respectively.

  Further, as shown in FIG. 4C, a plurality of fins 23 may be provided at regular intervals on the streamlined surface of the rectifying member 13A. The shape of the fin 23 is, for example, a streamlined shape as with the rectifying member 13A. By arranging the fins 23 on the rectifying member 13A, the rectifying effect of the downwash can be improved. On the other hand, although not shown, instead of the fins 23, the streamlined surfaces (curved surfaces 14, 15) of the rectifying member 13A may be recessed to form a plurality of recesses in the longitudinal direction of the rectifying member 13A. In addition, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Unmanned air vehicle 2 Main-body part 3A, 3B, 3C, 3D arm 4A, 4B, 4C, 4D Rotor drive part 5A, 5B, 5C, 5D Rotor 6 Storage frame 7 Cover member 8 Fluid storage tank 9 Electric pump 10 Pipe 11A, 11B, 11C, 11D Nozzle 12A, 12B, 12C, 12D Round bar 13A, 13B, 13C, 13D Rectifying member 14, 15 Curved surface 16, 17 Hole 21, 22 Round bar 23 Fin

Claims (5)

An unmanned air vehicle fluid spraying device used when spraying a fluid in a fluid storage tank mounted on the unmanned air vehicle through a nozzle mounted on the unmanned air vehicle,
A rectifying member that rectifies downwash generated by rotation of the rotor of the unmanned air vehicle,
The flow regulating member is in the downwash, and is disposed above the nozzle.   2. The unmanned flight according to claim 1, wherein the rectifying member has a streamlined surface from the rotor side toward the nozzle side, and the rectifying member is disposed below a rotation region of the rotor. Body fluid spraying equipment. The streamlined surface of the rectifying member has at least a first curved surface located on the rotor side and a second curved surface located on the nozzle side, and the curvature of the first curved surface is the second curved surface. Larger than the curvature of the curved surface,
The unmanned air vehicle fluid spraying device according to claim 2, wherein a boundary region between the first curved surface and the second curved surface is located on the rotor side.   A mounting surface of the nozzle is formed on the end of the second curved surface of the rectifying member, the nozzle is detachably mounted below the rectifying member through the mounting surface, and the nozzle is connected to the rectifying member. The fluid spraying device for an unmanned air vehicle according to claim 3, wherein the device is disposed on an inner side of the streamlined surface of the member.   5. The unmanned air vehicle fluid spraying device according to claim 4, wherein the rectifying member on which the second curved surface is disposed has a width that decreases toward the mounting surface.

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