CN109077046B - Mist spraying device and spraying control method - Google Patents
Mist spraying device and spraying control method Download PDFInfo
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- CN109077046B CN109077046B CN201811080084.9A CN201811080084A CN109077046B CN 109077046 B CN109077046 B CN 109077046B CN 201811080084 A CN201811080084 A CN 201811080084A CN 109077046 B CN109077046 B CN 109077046B
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- atomizing
- centrifugal
- atomization
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- rotation speed
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Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
- A01M7/0025—Mechanical sprayers
- A01M7/0032—Pressure sprayers
- A01M7/0042—Field sprayers, e.g. self-propelled, drawn or tractor-mounted
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
- A01M7/0082—Undercarriages, frames, mountings, couplings, tanks
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M7/00—Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
- A01M7/0089—Regulating or controlling systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS 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
- B64D1/18—Dropping or releasing powdered, liquid, or gaseous matter, e.g. for fire-fighting by spraying, e.g. insecticides
Abstract
The invention discloses a mist spraying device and a spraying control method, comprising an atomization device, wherein the atomization device comprises an atomization unit and a secondary atomization unit; the centrifugal atomizing disc and the secondary centrifugal atomizing disc are coaxially arranged, one side of the centrifugal atomizing disc with a diversion trench and one side of the secondary centrifugal atomizing disc with teeth are both arranged away from one side of an operation object, and the diameter of the secondary centrifugal atomizing disc is larger than that of the centrifugal atomizing disc; the wind power device comprises a protective shell and a fan, wherein the protective shell is arranged above the atomizing device to form an air channel, the fan is positioned in the air channel to generate a wind field, and the direction of the wind field passes through the atomizing device to face an operation object so that fog drops atomized by the atomizing device are dispersed towards the operation object.
Description
Technical Field
The invention belongs to the field of spraying, and particularly relates to a spraying device and a spraying control method, in particular to a mist spraying device and a spraying control method capable of controllably preventing droplets from dripping.
Background
The existing spraying device is characterized in that if the spraying device is not controlled, fog drops can fly out from the periphery of the spraying device, and particularly can fly out upwards, outwards and downwards by taking the horizontal plane of the spraying device as a reference, so that the fog drops are disordered and cannot completely reach an operation object, and the spraying effect of the spraying device can be directly influenced under the action of natural wind or other wind fields, so that the spraying effect of the spraying device is more disordered and uncontrollable. On the other hand, due to the fact that the drifted fog drops can touch objects such as the protective shell and the first motor, the fog drops are condensed into liquid drops, the liquid drops can fall on the blades uncontrollably, and adverse spraying effects such as leaf burning and the like are caused.
In view of this, it is necessary to provide a mist spraying device and a control method, so that mist droplets can be reasonably controlled, and the prevention of droplet landing is the subject of the present invention.
Disclosure of Invention
The invention provides a mist spraying device, which aims to solve the problems that the existing spraying device cannot reasonably control the direction of mist drops in the spraying process and the mist drops of the existing spraying device are easy to form drops.
In order to achieve the above purpose, the invention adopts the following technical scheme: an atomizing spray device comprises an atomizing device, wherein the atomizing device comprises an atomizing unit and a secondary atomizing unit; the atomizing unit comprises a centrifugal atomizing disc; the secondary atomization unit comprises a secondary centrifugal atomization disc, and a plurality of teeth are arranged on the periphery of the secondary centrifugal atomization disc at intervals along the circumferential direction;
the centrifugal atomizing disc and the secondary centrifugal atomizing disc are coaxially arranged, and the diameter of the secondary centrifugal atomizing disc is larger than that of the centrifugal atomizing disc, so that the outer peripheral surface of the secondary centrifugal atomizing disc with teeth extends to the outer side of the centrifugal atomizing disc;
still include wind-force device, wind-force device includes protective housing and fan, the protective housing is the cavity casing, and this cavity casing cover is established in atomizing device top in order to form an wind channel, the fan is arranged in the wind channel and is produced a wind field, and the direction of this wind field is through atomizing device orientation operation object to make the fogdrop after atomizing by atomizing device disperse towards operation object.
The relevant content explanation in the technical scheme is as follows:
1. in the above scheme, the atomizing unit comprises a first driving mechanism driving the centrifugal atomizing disc to rotate, the secondary atomizing unit comprises a second driving mechanism driving the secondary centrifugal atomizing disc to rotate, and the first driving mechanism and the second driving mechanism are respectively arranged on two sides of the centrifugal atomizing disc and the secondary centrifugal atomizing disc.
2. In the above scheme, a fan cover is further arranged in the protective shell, and the fan cover is sleeved on the periphery of a fan driving mechanism, so that a channel is formed between the fan cover and the protective shell.
3. In the scheme, the device also comprises a fixing frame structure, wherein the fixing frame structure comprises a fixing part and a drainage part, one end of the fixing part is fixed with the first driving mechanism, and the other end of the fixing part is fixed with the drainage part; one end of the drainage part, which is far away from the fixing part, is fixed with the second driving mechanism; the drainage part is of a linear type, a folded line type or an arc-shaped columnar structure.
4. In the above scheme, the wind power device further comprises a fan driving mechanism for driving the fan to rotate, and the rotating speed of the fan driving mechanism is greater than a first threshold value and less than a second threshold value.
5. In the above scheme, a detection device and a controller are further arranged for the atomizing device, the output end of the detection device is connected with the input end of the controller, the first output end of the controller is connected with the atomizing device, and the second output end of the controller is connected with the wind power device.
In order to achieve the above purpose, the invention adopts another technical scheme that: the mist spraying control method adopts the mist spraying device and is operated according to the following steps:
step one, starting an atomization device;
secondly, starting the wind power device;
thirdly, controlling the liquid medicine to flow into the atomizing device;
fourthly, when the detection device detects that the traditional Chinese medicine liquid flows into the atomization device, the rotating speed of the atomization device is increased to the optimal atomization rotating speed;
fifthly, controlling to stop supplying medicine after the spraying task is completed;
and sixthly, when the detection device detects that the liquid medicine in the atomizing device is not available, the atomizing device and the wind power device are immediately turned off.
The relevant content explanation in the technical scheme is as follows:
1. in the above scheme, in the fourth step, the detecting device detects the current rotation speed of the centrifugal atomizing disc and/or the secondary centrifugal atomizing disc, compares the current rotation speed with a target rotation speed, and if the current rotation speed is smaller than the target rotation speed and the difference value between the current rotation speed and the target rotation speed is larger than the speed-increasing threshold value, determines that the liquid medicine has flowed into the centrifugal atomizing disc, and increases the rotation speed of the atomizing device to the optimal atomization rotation speed at the moment;
in the sixth step, the detecting device detects the current rotation speed of the centrifugal atomizing disc and/or the secondary centrifugal atomizing disc, compares the current rotation speed with a given rotation speed, and if the difference value between the current rotation speed and the target rotation speed is smaller than the shutdown threshold value, judges that the liquid medicine flows out of the atomizing device, and at the moment, the atomizing device and the wind power device are turned off.
2. In the above scheme, in the fourth step, the detecting device detects the flow rate of the liquid medicine entering the centrifugal atomizing disc, and when the detected flow rate is greater than zero, the detecting device determines that the liquid medicine has flowed into the centrifugal atomizing disc, and at this time, the rotating speed of the atomizing device is increased to the optimal atomizing rotating speed;
in the sixth step, the detecting device detects the flow rate of the liquid medicine entering the centrifugal atomizing disk, and when the detected flow rate is zero, the detecting device judges that the liquid medicine flows out of the centrifugal atomizing disk, and at the moment, the atomizing device and the wind power device are closed.
3. In the above scheme, the detecting device detects that the flow is zero, including in the verification time, the flow detected by the detecting device is continuously zero.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. according to the invention, by designing the wind power device, the direction of the fog drops is controlled, so that the fog drops can better have a trend of facing an operation object and have controllability;
2. by arranging the drainage part, the liquid drop is guided to flow to a certain position while the fixing effect is achieved, the liquid drop is prevented from being blown away, and meanwhile, the effect of hiding the electric wire is achieved;
3. through the wind field size of the control wind power device and the cooperation of the drainage part, the liquid drops can be more controllable, and the liquid drops are prevented from being dropped randomly to cause phytotoxicity.
4. The detection device is used for detecting to control the atomization device and the secondary atomization device to be opened, accelerated and closed, so that the direct dripping of the liquid medicine is avoided, and the chemical injury and the liquid medicine waste are caused.
Drawings
FIG. 1 is a schematic view of the sprinkler in this embodiment;
fig. 2 is a schematic structural diagram of the unmanned aerial vehicle in the present embodiment;
fig. 3 is a schematic spraying diagram of the mist spraying unmanned aerial vehicle in the embodiment;
fig. 4 is a schematic structural view of the centrifugal atomizing disk in the present embodiment;
FIG. 5 is a schematic diagram of the structure of a secondary centrifugal atomizing disk in the present embodiment;
fig. 6 is a schematic diagram of the principle connection of the control circuit in the present embodiment.
In the above figures: 1. a centrifugal atomizing disk; 2. a secondary centrifugal atomizing disk; 3. a first motor; 4. a second motor; 5. a catheter; 8. a body; 9. a rotor; 10. a spraying device; 11. landing gear; 12. a cover plate; 13. a diversion trench; 14. teeth; 21. a protective shell; 22. a blower; 23. a third motor; 24. a fan housing; 31. a holding portion; 32. a drainage part.
Detailed Description
The invention is further described below with reference to the accompanying drawings and examples:
example 1: mist spraying device
Referring to fig. 1-5, an example is shown of an unmanned aerial vehicle having a mist sprayer 10 mounted therein, wherein the unmanned aerial vehicle includes a rotor 9, a fuselage 8 to which the rotor 9 is attached, a medicine tank, a flight control system, and the sprayer 10. The number of the rotors 9 for flying is not limited, and may be single rotors, four rotors, six rotors or eight rotors; the medicine box is carried on the machine body 8, the position of the medicine box is not limited, and the medicine box can be embedded into the machine body 8, and can also be placed on the machine body 8 and fixed with the machine body 8. The flight control system controls the unmanned aerial vehicle to fly and the flight attitude to change, is mounted on the machine body 8, and has no limitation on the position; the spraying device 10 is arranged on one side of the machine body 8 relative to the operation object, is fixed with the machine body 8, receives the liquid medicine flowing out of the medicine box and realizes mist spraying.
The spraying device 10 includes an atomizing device including an atomizing unit and a secondary atomizing unit which are sequentially disposed from the main body 8 toward the direction of the work object. Referring to fig. 4, the atomization unit includes a centrifugal atomization disc 1, a plurality of diversion trenches 13 are formed on the centrifugal atomization disc 1, and each diversion trench 13 extends from the central position of the centrifugal atomization disc 1 to the edge; a first drive mechanism is provided for the centrifugal atomizing disk 1, and is used for driving the centrifugal atomizing disk 1 to axially rotate. In this embodiment, the first driving mechanism adopts the first motor 3, and the first motor 3 is coaxially fixed with the centrifugal atomizing disk 1 and drives the centrifugal atomizing disk 1 to rotate, that is, the output shaft of the first motor 3 is in transmission connection with the center of the atomizing disk 1.
Referring to fig. 5, the secondary atomization unit includes a secondary centrifugal atomization disc 2, wherein a plurality of teeth 14 are circumferentially and alternately arranged on the periphery of the secondary centrifugal atomization disc 2, and each tooth 14 is radially arranged outwards with reference to the center of the secondary centrifugal atomization disc 2; a second driving mechanism is arranged for the secondary centrifugal atomizing disk 2 and is used for driving the secondary centrifugal atomizing disk 2 to axially rotate. In this embodiment, the second driving mechanism adopts the second motor 4, and the second motor 4 is coaxially fixed with the secondary centrifugal atomizing disk 2 and drives the secondary centrifugal atomizing disk 2 to rotate, that is, the output shaft of the second motor 4 is in transmission connection with the center of the secondary centrifugal atomizing disk 2.
In the assembled state, the centrifugal atomizing disk 1 and the secondary centrifugal atomizing disk 2 are coaxially and relatively rotatably arranged, one side of the centrifugal atomizing disk 1, which is provided with the diversion trench 13, is arranged towards one side of the machine body 8, one side of the secondary centrifugal atomizing disk 2, which is provided with the teeth 14, is arranged towards one side of the machine body 8, and the diameter of the secondary centrifugal atomizing disk 2 is larger than that of the centrifugal atomizing disk 1, so that the outer peripheral surface of the secondary centrifugal atomizing disk 2, which is provided with the teeth 14, extends to the outer side of the centrifugal atomizing disk 1.
The first motor 3 and the second motor 4 are respectively arranged at two sides of the spraying device 10, namely, the first motor 3 is arranged at one side, close to the machine body 8, of the horizontal planes of the atomizing unit and the secondary atomizing unit, and the second motor 4 is arranged at one side, far away from the machine body 8, of the horizontal planes of the atomizing unit and the secondary atomizing unit. In this embodiment, under the condition that unmanned aerial vehicle normally put, atomizing unit sets up in the top of secondary atomizing unit.
The liquid outlet of medical kit connects through a catheter 5, and the liquid outlet of catheter 5 is close to one side that centrifugal atomizing dish 1 has guiding gutter 13, and atomizing unit inlet sets up towards fuselage 8, and the liquid medicine in catheter 5 pours into the inlet through the water pump this moment into, realizes once atomizing through centrifugal atomizing dish 1, realizes secondary atomizing through secondary centrifugal atomizing dish 2 again, realizes atomizing spraying.
The centrifugal atomizing disk 1 is provided with a cover plate 12 covered on one side with a diversion trench 13, a liquid inlet is also arranged on the cover plate 12, and a liquid outlet of the liquid guide pipe 5 extends to the liquid inlet of the cover plate 12. The cover plate 12 plays a role in preventing the liquid medicine from splashing, and can ensure that the liquid medicine accurately flows into the centrifugal atomizing disk 1.
Referring to fig. 1, the wind power device further comprises a protection shell 21 and a multi-blade fan 22, wherein the protection shell 21 is a hollow shell with two open ends, the hollow shell is covered above the atomizing device to form an air duct, the fan 22 is positioned in the air duct, the fan 22 is driven by a fan driving mechanism to rotate to generate a wind field, the size of the wind field is controlled, and the direction of the wind field passes through the atomizing device and faces an operation object, so that mist droplets atomized by the atomizing device are dispersed towards the operation object.
In this embodiment, the fan driving mechanism and the first motor 3 are both disposed in the hollow protective housing 21, and the atomizing unit and the secondary atomizing unit are exposed from the bottom of the protective housing 21, so that the mist droplets can be thrown out from the horizontal planes of the atomizing unit and the secondary atomizing unit without being thrown onto the protective housing 21. The blower 22 may be designed coaxially with the sprinkler 10 or may be offset to some extent so long as a downward wind field is created that corresponds generally to the atomizing unit and the secondary atomizing unit. The wind field is downward along the protective shell 21, and the fog drops originally dispersed upwards and horizontally are changed to be dispersed in a downward trend by the corresponding atomizing unit and the secondary atomizing unit; meanwhile, the fog drops which are originally dispersed downwards are also acted to a certain extent, so that the downward trend of the fog drops is larger. The fan driving mechanism adopts a third motor 23, and the rotating speed of the third motor 23 is larger than the second threshold value and smaller than the first threshold value. If the wind power of the fan 22 is too small, the mist drops cannot be completely pressed down, and the drifted mist drops are condensed into drops on the protective case 21 and the first motor 3. If greater than the first threshold, the droplet will be caused to fall. The size of the wind field can be controlled by adjusting the rotation speed of the third motor 23, and the wind field size is adjusted in real time according to the rotation speed of the first motor 3 and/or the second motor 4, but the wind field size also needs to be limited in the range of the first threshold value and the second threshold value; the constant value can be preset, and the constant rotation speed can be kept to act on the fog drops in the range that the second threshold value is larger than the first threshold value and smaller than the first threshold value, so that the structure is simple, and the control relation is reduced. If the dispersion effect is more concentrated, the rotation speed of the third motor 23 can be properly increased to make the wind field larger, at this time, the spraying is mainly concentrated in a smaller range, and at this time, the spraying range is reduced and the density is larger, and the spraying device is mainly used for the plants with high and large concentration, and has stronger penetrating power than the larger operation objects of insect damage.
In addition, since the blower 22 is disposed on the side of the sprinkler 10 away from the operation object, the wind field blows in the direction from top to bottom, and the mist droplets are prevented from being scattered around the main body 8 due to the complicated wind field generated by the rotor 9.
Further, in this embodiment, a fan housing 24 is disposed in the protective housing 21, and the fan housing 24 is sleeved on the third motor 23 and the first motor 3, so that a wind field generated by the fan 22 flows to the spraying device 10 along a channel formed between the fan housing 24 and the protective housing 21, so that the wind field is more concentrated and more targeted, and mist drops have a tendency of dispersing toward an operation object, and meanwhile, the mist drops can be prevented from being directly dropped due to the contact condensation of the mist drops with the first motor 3, the third motor 23, the protective housing 21 and the like, which are close to the machine body 8, so as to cause a phytotoxicity.
In this embodiment, the fixing frame structure is further included, the number of the fixing frame structures is not limited, and preferably, the fixing frame structure can be realized by adopting three fixing frame structures with more stable structures, and of course, the number of the fixing frame structures can be 2, 4, 5, etc. by those skilled in the art, and in special cases, the fixing frame structure can be realized by designing 1 fixing frame structure. Preferably, the number of 3 fixing frames with better stabilizing effect can be selected, the 3 fixing frames are uniformly distributed around the axis and fixed with the side walls of the first motor 3 and the second motor 4, and of course, the fixing frames can also be fixed with the top or the bottom of the first motor 3 or the second motor 4, so long as the fixing frames are firm, and the specific positions are not limited. Specifically, the fixing frame structure includes a fixing portion 31 and a drainage portion 32, one end of the fixing portion 31 is fixed with the first motor 3, the other end is fixed with the drainage portion 32, and one end of the drainage portion 32 away from the fixing portion 31 is fixed with the second motor 4, and meanwhile, the drainage function is achieved. The drainage portion 32 can guide droplets formed by contact between mist droplets and the surface of the droplets, so that the droplets move downwards along the extending direction of the drainage portion 32 under the action of gravity and are converged together, and the droplets can not directly act on plants to generate phytotoxicity. A receiving portion (not shown) may be provided below the drainage portion 32 to receive the liquid droplets that have fallen down, so as to prevent the liquid droplets from directly falling onto the work object.
In this embodiment, unmanned aerial vehicle still includes undercarriage 11, and it is fixed and with sprinkler 10 homonymy with fuselage 8, plays the effect of supporting unmanned aerial vehicle, undercarriage 11 sets up in pairs, forms a accommodation space, and sprinkler 10 accepts in the accommodation space that undercarriage 11 constitutes, and undercarriage 11 highly is greater than sprinkler 10's height simultaneously, plays the effect of protection sprinkler 10, prevents sprinkler 10 and ground collision.
The mist spray droplets in this embodiment are 30 microns or less. When the diameter of the fog drops exceeds 30um, the descending speed is high, the weight of single fog drops is high, and the fog drops cannot be lifted by a downward-pressure wind field of the aircraft. The diameter of the fog drops is too small, such as 2.5um, and the fog drops can suspend in the air for a long time, so that the fog drops are extremely easy to be blown away by wind. When the diameter of the fog drops is 10-30um, the falling speed is not too high, and after the downward-pressure wind field of the airplane reaches the ground, the rebound wind blows the fog drops which reach later upwards to act on the back surfaces of the plant leaves. The mist spray of this scheme is small in droplet diameter, can float in the air in a short time, is blown upwards by the rebound wind field of aircraft easily. And have certain showy time, can fully enter into leaf gap, leaf back, reach and spray the effect, simultaneously, mist droplet that mist sprayed is littleer, sprays more evenly, avoids the phytotoxicity to a certain extent.
Since the spraying device 10 includes an atomizing unit and a secondary atomizing unit. Wherein, the atomizing unit includes centrifugal atomizing dish 1 and sets up in the inlet of centrifugal atomizing dish 1 one side surface, and liquid medicine flows in centrifugal atomizing dish 1 from the inlet, throws away under the effect of surface centrifugal runner and realizes the atomizing. The secondary atomizing unit includes secondary centrifugal atomizing disk 2 and sets up a plurality of teeth 14 on a side surface, and the coaxial nestification of secondary atomizing unit and atomizing unit to set up in the atomizing unit and keep away from the one side of feed liquor mouth, both have the clearance, cause friction when preventing to rotate. Because the atomization unit and the secondary atomization unit coaxially and reversely rotate, fog drops with extremely small particle sizes are thrown out. Which is sprayed by driving the atomizing unit and the secondary atomizing unit by means of the first motor 3 and the second motor 4, respectively, and the first motor 3 and the second motor 4 are preferably rotated in opposite directions, and the second motor 4 is rotated in a counterclockwise/clockwise direction when the first motor 3 is rotated in a clockwise/counterclockwise direction. Of course, the first motor 3 and the second motor 4 may also rotate in the same direction, without being limited thereto.
In order to realize better mist spraying, the rotating speeds of the atomizing unit and the secondary atomizing unit and the diameter of the rotary table are required to be properly increased, and the rotating speeds cannot be set too high, so that the problems of breakage of the rotary table, overlarge power consumption, influence on the service life of a motor and the like are caused. The rotating speed of the atomizing unit is increased to 18000 revolutions per minute, the diameter of the centrifugal atomizing disk 1 is more than 80mm, the rotating speed of the secondary atomizing unit is increased to 15000 revolutions per minute, the diameter of the secondary centrifugal atomizing disk 2 is greater than that of the centrifugal atomizing disk 1, the range of the difference between the diameter of the secondary centrifugal atomizing disk 2 and the diameter of the centrifugal atomizing disk 1 is 5-150 mm, the rotating speed and the rotating disk of the secondary centrifugal atomizing disk are both greater than those of a common atomizing device, the vibration is also larger, the vibration is arranged below the machine body 8, the distance between the rotary disk and the rotary wing 9 is longer, the influence on the flight of an unmanned aerial vehicle can be reduced, and the accuracy of flight control is improved.
Referring to fig. 6, a detection device and a controller are further arranged for the atomization device, the output end of the detection device is connected with the input end of the controller, the first output end of the controller is connected with the atomization device, and the second output end of the controller is connected with the wind power device. Specifically, the first output end further comprises a first sub-output end connected with the first driving mechanism, the second sub-output end connected with the second driving mechanism, the second output end connected with the fan driving mechanism, the detection device connected with the atomization device, and further, the detection device is connected with the atomization unit and/or the secondary atomization unit. The controller is pre-stored with a wind power threshold value, a speed-up threshold value, a stop threshold value and an optimal atomization rotating speed. Hereinafter, the wind threshold is a first threshold for a maximum wind value and a second threshold for a minimum wind value; the speed increasing threshold is a third threshold for the centrifugal atomizing disk, a fourth threshold for the secondary centrifugal atomizing disk, the stopping threshold is a fifth threshold for the centrifugal atomizing disk, and a sixth threshold for the secondary centrifugal atomizing disk.
In this embodiment, when the fan 22 is started, the wind power of the fan 22 needs to be controlled, and if the wind power is too large, the condensed liquid drops on the drainage portion 32 are directly blown away, so that the drainage effect is lost, that is, the rotation speed of the third motor 23 cannot exceed the first threshold, if the rotation speed exceeds the first threshold, the drainage portion 32 will not function regardless of the design, the liquid drops directly drop from the drainage portion 32, and the liquid drops are uncontrollable. The rotation speed of the third motor 23 cannot be smaller than the second threshold, otherwise the mist droplets cannot be completely pressed down, and the drifting mist droplets are condensed into droplets on the protective case 21 and the first motor 3.
The spray control method of the spray device 10 is as follows:
in actual operation, before spraying, the centrifugal atomizing disk 1 and the secondary centrifugal atomizing disk 2 are started respectively through the first motor 3 and the second motor 4, so that the centrifugal atomizing disk 1 and the secondary centrifugal atomizing disk 2 rotate at a lower rotating speed, and residual liquid medicine is prevented from directly flowing out under the condition of no atomization, thereby causing phytotoxicity. After that, the third motor 23 is started to start the fan 22 in the wind power device, and after the wind power device is started, the medicine pump is controlled to enable the medicine liquid to flow onto the atomizing device along the liquid guide pipe 5, so that the wind power device is started before the medicine liquid is atomized, and the dripping and uncontrollable of fog drops of the atomizing device without the action of the wind power device are prevented. The time for opening the wind power device is not limited, and the spraying device can be started before and at the same time, or the medicine pump can be started simultaneously and after the start, so long as the opening time of the spraying device is ensured to be earlier than the opening time of the medicine pump. The first motor 3 or the second motor 4 is provided with a speed measuring device, or both are provided with speed measuring devices, and can be integrated in an electronic speed regulator, or can be used for directly measuring the rotating speed of the motor or the atomizing disk by a light sensing speed measurer. Under the condition, when the speed measuring device detects the rotating speed of the first motor 3, and when the liquid medicine flows through the centrifugal atomizing disk 1, the speed measuring device detects that the rotating speed is obviously reduced, the liquid medicine is considered to flow into the centrifugal atomizing disk 1, and then the controller increases the rotating speeds of the first motor 3 and the second motor 4 to the preset optimal atomizing rotating speed. When the spraying task is finished, the pharmaceutical pump is firstly controlled to stop, and when the speed measurement of the centrifugal atomizing disk 1 is obviously accelerated, the centrifugal atomizing disk 1 is considered to have no liquid medicine, and then the controller turns off the first motor 3, the second motor 4 and the third motor 23. The speed measuring device detects the second motor 4 or the rotation speed of the two motors and so on, and is not described here.
The detection device is used for detecting the actual current rotating speed of the atomization unit, the controller compares the current rotating speed with the given target rotating speed, when the current rotating speed is found to be smaller than the target rotating speed and the difference value is larger than a third threshold value, the liquid medicine is considered to flow into the atomization device, and at the moment, the controller controls the first motor 3 and the second motor 4 to increase the rotating speed to the optimal rotating speed, so that dispersion spraying is realized. Of course, the detecting device can also detect the current rotation speed of the secondary centrifugal atomizing unit, and the controller compares whether the difference between the current rotation speed of the secondary centrifugal atomizing disk 2 and the given rotation speed is greater than the fourth threshold value, and the principle is the same as the above, and will not be repeated. The third threshold is greater than the fourth threshold. When the rotation speeds of the two motors are detected simultaneously, the relation between the respective motors and the corresponding speed-increasing thresholds can be compared independently, and as long as the rotation speed difference value of one motor is larger than the corresponding speed-increasing threshold, the first motor 3 and the second motor 4 are controlled to increase the rotation speed to the optimal rotation speed; the speed increase can also be controlled by means of a weighted sum, comparing the weighted sum of the difference between the current speed of the first motor 3 and its target speed and the difference between the current speed of the second motor 4 and its target speed with the weighted sum of the third and fourth threshold values, and controlling the first motor 3 and the second motor 4 to increase the speed to the optimal speed when the weighted sum of the difference between the speeds is greater than the weighted sum of the third and fourth threshold values. After the spraying task is finished, the pharmaceutical pump is controlled to stop the inflow of the liquid medicine, the detecting device detects whether the difference exists between the current rotating speed of the atomizing unit and the given rotating speed or not, or the difference between the current rotating speed and the given rotating speed is smaller than a fifth threshold value, if the difference is smaller, the centrifugal atomizing disk 1 is free of the liquid medicine, and the controller controls the first motor 3, the second motor 4 and the third motor 23 to stop rotating so as to close the atomizing unit and the secondary atomizing unit, so that the spraying task is finished. Or detecting whether the difference between the current rotating speed of the secondary atomization unit and the given target rotating speed is smaller than a sixth threshold value, if so, indicating that no liquid medicine exists, and turning off the motor, wherein the fifth threshold value is larger than the sixth threshold value. Or simultaneously detecting the current rotation speeds of the atomizing unit and the secondary atomizing unit, and judging through a weighted sum, wherein the method is similar to the method described above, and the description is omitted here. The current rotating speed of the atomizing unit or the secondary atomizing unit or the colleague detecting atomizing unit and the secondary atomizing unit is detected through the detecting device, and compared with the target rotating speed, whether the centrifugal atomizing disk and the secondary centrifugal atomizing disk still have liquid medicine or not is judged, manual control is not needed, automatic spraying opening and closing are realized, simplicity and convenience are realized, meanwhile, the phenomenon that liquid drops which are not atomized drop down is avoided, the phytotoxicity is caused, and the spraying effect is improved.
Example 2: mist spraying device
Referring to fig. 1 to 5, the rest is the same as in example 1 except that: the detection device is used for detecting the flow of liquid medicine, the detection device can be arranged on the liquid guide pipe, comprises a liquid outlet of the liquid guide pipe, is arranged at a distance from the liquid outlet, or is arranged at any position of the liquid guide pipe according to requirements, when the detection device detects that the flow value is greater than zero, the liquid medicine flows through, the rotating speed of the centrifugal atomizing disk and the secondary centrifugal atomizing disk is directly improved to the optimal atomizing rotating speed, and when the liquid medicine flows to the centrifugal atomizing disk, the centrifugal atomizing disk and the secondary centrifugal atomizing disk reach the optimal atomizing rotating speed. The speed-up process of the centrifugal atomizing disk and the secondary centrifugal atomizing disk needs a certain time, preferably, the detection device can be arranged at a distance from the liquid outlet, when the flow rate is detected to be larger than zero, the rotation speed is increased to the optimal atomizing rotation speed, the liquid medicine can just flow onto the centrifugal atomizing disk or the liquid medicine can flow into the centrifugal atomizing disk after the atomizing device reaches the optimal atomizing rotation speed; or when the detection device is arranged at a longer distance from the liquid outlet, the rotating speed increasing time of the atomizing device can be controlled or the rotating speed is increased again by giving a delay time, so that when the liquid medicine reaches the centrifugal atomizing disk, the centrifugal atomizing disk and the secondary centrifugal atomizing disk just reach the optimal atomizing rotating speed or the liquid medicine can flow through the centrifugal atomizing disk after the atomizing device reaches the optimal atomizing rotating speed.
The detection device detects the flow rate of the liquid medicine entering the centrifugal atomizing disk, when the detected flow rate is zero, the liquid medicine is judged to flow out of the centrifugal atomizing disk, the centrifugal atomizing disk has no liquid medicine, and the atomizing device and the air-powered device can be closed. Furthermore, when the detection device is arranged at the liquid outlet, no liquid medicine exists in the liquid guide tube at the moment, and the atomization device and the wind power device can be controlled to be closed; when the detection device is arranged at a distance from the liquid outlet, a delay time can be controlled to close the atomizing device and the wind power device so as to ensure that no liquid medicine exists on the centrifugal atomizing disc. It should be noted that, in order to ensure that no liquid medicine exists in the catheter, when the detection device detects that the flow is zero, a check time needs to pass, in which the flow is continuously zero, so that no liquid medicine can be ensured in the catheter, false detection is prevented when the flow is small, the liquid medicine still exists after the atomization device and the wind power device are prevented from being closed, and liquid dripping is prevented. The detection means may comprise a flow meter, the type of flow meter being not limited.
The atomization device and the wind power device are turned on and off here, typically when the unmanned aerial vehicle is turned on spraying from the first waypoint and turned off spraying from the last waypoint; meanwhile, when the line is changed, the unmanned aerial vehicle turns off the spraying firstly, and after the line is changed, the spraying is turned on again on a new line; or when an emergency occurs in the unmanned aerial vehicle and a return trip is required, including faults, insufficient electric quantity, insufficient medicine quantity and the like, at this time, the spraying device 10 is turned off.
For the above embodiments, the present embodiment is further explained and the possible changes are described as follows:
1. in the above embodiment, a damping device may be further disposed between the second motor 4 and the secondary atomizing unit connected thereto, and/or the first driving mechanism may be disposed between the first driving mechanism and the atomizing unit connected thereto, so as to prevent the impact of the vibration of the high-speed rotating motor on the secondary atomizing unit and the spraying of the atomizing unit. Further, the damping device is preferably arranged on the secondary atomization unit far away from the machine body 8, the damping device is far away from the machine body 8, the larger the vibration is, the damping can be performed on the part with the larger vibration in a targeted manner, the assembly efficiency is improved, and meanwhile the cost is reduced.
2. In the above embodiment, the up-down positions of the atomizing unit and the secondary atomizing unit can also be reversed, and the first motor and the second motor are also reversed, that is, the liquid inlet of the atomizing unit is far away from the machine body 8, at this time, the second motor 4 is fixed with the secondary atomizing unit and drives the secondary atomizing unit to rotate, the first motor 3 is fixed with the atomizing unit and drives the secondary atomizing unit to rotate, at this time, the liquid medicine in the liquid guide tube 5 is injected into the liquid inlet from the liquid inlet, and the liquid medicine is sucked into the atomizing unit to realize mist spraying. A second motor 4, a secondary atomizing unit, an atomizing unit and a first motor 3 are formed coaxially. The cover plate 12 is arranged between the atomizing unit and the first motor 3 at this time, and mist drops can be prevented from dripping. The first motor 3 and the second motor 4 are arranged on two sides of the atomizing unit and the secondary atomizing unit, the structure is simple, the mutual interference of the two motors is avoided, the service life of the motors is prolonged, the cost is reduced, and the maintenance is convenient.
3. In the above embodiment, in order to slow down vibrations, the whole sprinkler 10 can be fixedly connected to the water tank through the protective housing 21, of course, also can pass through a connection structure with the first motor 3 and be fixedly connected with the water tank, pass through another connection structure with the second motor 4 and be fixedly connected with the water tank, because there is a large amount of water in the water tank, can play certain reduction effect to vibrations that its rotation caused, avoid causing the influence to various sensors of unmanned aerial vehicle fuselage 8, improve flight control's accuracy. Of course, in practice, the first motor 3 and the second motor 4 may be fixedly connected to the body 8, not limited to the connection in the present embodiment.
4. In the above embodiment, the drainage portion 32 is a linear, folded-line or arc column, and serves to fix the second motor 4. The drainage portion 32 is arc-shaped, and the arc is designed, so that under the general condition, the drainage portion 32 tends to be vertical downwards, drainage is easy, and accordingly, the height of the whole device is increased, which is unreasonable, so that the drainage portion 32 can be designed to have a certain arc, the drainage effect is ensured, and meanwhile, the height is reduced; or the drainage part 32 is cylindrical or elliptic cylindrical, so that a good drainage effect can be achieved, and liquid drops are prevented from directly dripping; or the drainage part 32 is hollow and tubular, and the drainage part 32 can be provided with a conducting wire and the like to play a role of hiding the conducting wire, reduce the contact area between the conducting wire and the fog drops and enable the structural design to be more reasonable.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (8)
1. A mist sprayer, characterized in that: comprises an atomization device, wherein the atomization device comprises an atomization unit and a secondary atomization unit; the atomization unit comprises a centrifugal atomization disc and a first driving mechanism for driving the centrifugal atomization disc to rotate; the secondary atomization unit comprises a secondary centrifugal atomization disc and a second driving mechanism for driving the secondary centrifugal atomization disc to rotate, and a plurality of teeth are arranged on the periphery of the secondary centrifugal atomization disc at intervals along the circumferential direction;
the centrifugal atomizing disc and the secondary centrifugal atomizing disc are coaxially arranged, and the diameter of the secondary centrifugal atomizing disc is larger than that of the centrifugal atomizing disc, so that the outer peripheral surface of the secondary centrifugal atomizing disc with teeth extends to the outer side of the centrifugal atomizing disc;
the air blower is positioned in the air duct to generate an air field, and the direction of the air field passes through the atomizing device to face an operation object so as to enable fog drops atomized by the atomizing device to be dispersed towards the operation object;
the protective shell is also provided with a fan cover which is sleeved on the periphery of a fan driving mechanism so as to form a channel between the fan cover and the protective shell;
the fixing frame structure comprises a fixing part and a drainage part, one end of the fixing part is fixed with the first driving mechanism, and the other end of the fixing part is fixed with the drainage part; one end of the drainage part, which is far away from the fixing part, is fixed with the second driving mechanism; the drainage part is of a linear type, a folded line type or an arc-shaped columnar structure;
a controller is further arranged for the atomizing device, a first output end of the controller is connected with the atomizing device, and a second output end of the controller is connected with the wind power device;
the controller controls the same-direction or reverse-direction rotation of the first driving mechanism and the second driving mechanism, and also controls the rotating speeds of the first driving mechanism, the second driving mechanism and the fan driving mechanism.
2. The mist spray apparatus of claim 1 wherein: the first driving mechanism and the second driving mechanism are respectively arranged on two sides of the centrifugal atomizing disk and the secondary centrifugal atomizing disk, a plurality of diversion trenches are formed in the centrifugal atomizing disk, and each diversion trench extends from the central position of the centrifugal atomizing disk to the edge.
3. The mist spray apparatus of claim 1 wherein: the wind power device further comprises a fan driving mechanism for driving the fan to rotate, and the rotating speed of the fan driving mechanism is larger than a first threshold value and smaller than a second threshold value.
4. The mist spray apparatus of claim 1 wherein: and a detection device is further arranged for the atomization device, and the output end of the detection device is connected with the input end of the controller.
5. A mist spraying control method is characterized in that: the mist sprayer of claim 4, wherein the steps of:
step one, starting an atomization device;
secondly, starting the wind power device;
thirdly, controlling the liquid medicine to flow into the atomizing device;
fourthly, when the detection device detects that the traditional Chinese medicine liquid flows into the atomization device, the rotating speed of the atomization device is increased to the optimal atomization rotating speed;
fifthly, controlling to stop supplying medicine after the spraying task is completed;
and sixthly, when the detection device detects that the liquid medicine in the atomizing device is not available, the atomizing device and the wind power device are immediately turned off.
6. The mist spray control method according to claim 5, characterized in that: in the fourth step, the detecting device detects the current rotation speed of the centrifugal atomizing disc and/or the secondary centrifugal atomizing disc, compares the current rotation speed with a target rotation speed, and judges that the liquid medicine flows into the centrifugal atomizing disc if the current rotation speed is smaller than the target rotation speed and the difference value of the current rotation speed and the target rotation speed is larger than a speed-increasing threshold value, and at the moment, the rotation speed of the atomizing device is increased to the optimal atomization rotation speed;
in the sixth step, the detecting device detects the current rotation speed of the centrifugal atomizing disc and/or the secondary centrifugal atomizing disc, compares the current rotation speed with a given rotation speed, and if the difference value between the current rotation speed and the target rotation speed is smaller than the shutdown threshold value, judges that the liquid medicine flows out of the atomizing device, and at the moment, the atomizing device and the wind power device are turned off.
7. The mist spray control method according to claim 5, characterized in that: in the fourth step, the detecting device detects the flow rate of the liquid medicine entering the centrifugal atomizing disk, when the detected flow rate is greater than zero, the liquid medicine is judged to have flowed into the centrifugal atomizing disk, and the rotating speed of the atomizing device is increased to the optimal atomizing rotating speed;
in the sixth step, the detecting device detects the flow rate of the liquid medicine entering the centrifugal atomizing disk, and when the detected flow rate is zero, the detecting device judges that the liquid medicine flows out of the centrifugal atomizing disk, and at the moment, the atomizing device and the wind power device are closed.
8. The mist spray control method according to claim 7, characterized in that: the detection device detects that the flow is zero, and the flow detected by the detection device is continuously zero in the verification time.
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| CN109769788B (en) * | 2019-01-02 | 2022-03-01 | 北京农业智能装备技术研究中心 | Atomizer, atomization system and atomization drug delivery method |
| CN109731704B (en) * | 2019-01-15 | 2024-04-19 | 苏州极目机器人科技有限公司 | Discharge device, spraying equipment and aerial sprinkler |
| TW202132004A (en) * | 2020-02-05 | 2021-09-01 | 德商拜耳廠股份有限公司 | Spray unit |
| CN113695099B (en) * | 2021-08-05 | 2022-07-26 | 苏州极目机器人科技有限公司 | Centrifugal atomization device |
| CN114932026B (en) * | 2022-06-16 | 2023-06-16 | 苏州极目机器人科技有限公司 | Particle size determining method of atomizing device, atomizing device and unmanned aerial vehicle |
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