Low-altitude fog dispersal device for unmanned aerial vehicle

Abstract

The invention discloses a low-altitude fog dispersal device for an unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicles. Comprising a machine body, a wind power assembly arranged below the machine body and a silver iodide smoke strip installed at the outlet end of the wind power assembly. The wind power assembly comprises a high-speed fan and a flow guide cover which is arranged at the rear end of the air outlet end of the high-speed fan and contracts. The silver iodide cigarette bar is inserted into a straight cylinder at the tail end of the flow guide cover; the high-speed fan is provided with an electric heating mechanism in a matched mode, and the silver iodide smoke strip is provided with an ignition mechanism in a matched mode. According to the invention, data fusion calculation is carried out, so that the fog concentration can be accurately sensed; the accuracy and the stability of fog detection are improved, and more comprehensive and reliable information support is provided for fog dispersal operation; through the auxiliary assembly, the flexibility, reliability and efficiency of fog dispersal operation are improved; according to the fog concentration and other environmental parameters, parameters such as the power of the wind power assembly and the silver iodide release amount are adjusted in real time, and the fog dispersal operation which is more intelligent and more suitable for the environment is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles, and particularly to a low-altitude fog dissipation device for unmanned aerial vehicles. Background Art

[0002] Foggy weather has brought adverse effects to many fields; for example, in the fields of transportation and aerospace, thick fog reduces visibility, leading to problems such as traffic accidents and flight delays. Therefore, people have been using scientific means to artificially intervene in the weather.

[0003] Existing fog dissipation means mostly rely on ground equipment or large aircraft, which are costly and lack flexibility; especially for low-altitude fog, it is difficult to play a role. In recent years, with the development of unmanned aerial vehicle technology, the use of rotorcraft to cooperate with the spreading of materials such as silver iodide has been developed in the direction of low-altitude fog dissipation operations.

[0004] Through the use and research of our unit in recent years, it has been found that there are still some deficiencies in the current low-altitude fog dissipation devices for unmanned aerial vehicles. For example, relying on the natural combustion of silver iodide smoke sticks or simply spreading silver iodide particles, etc., to release silver iodide into the fog range; however, the concentration of fog is inconsistent everywhere, resulting in a large consumption of the agent to ensure the effect, causing a certain waste; the spreading of silver iodide and the smoke are not very controllable, resulting in low operation efficiency; during operation, the silver iodide agent is prone to getting damp in the storage bin, affecting the effect; the operation process is basically in a fixed mode, with low refinement, further leading to high consumption. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems in the prior art, and to propose a low-altitude fog dissipation device for unmanned aerial vehicles.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions: A low-altitude fog dissipation device for unmanned aerial vehicles, comprising an airframe, a wind power assembly arranged below the airframe, and a silver iodide smoke stick installed at the outlet end of the wind power assembly; The wind power assembly includes: a high-speed fan, and a flow guide cover with a rear-end contraction arranged at the air outlet end of the high-speed fan; the silver iodide smoke stick is inserted into the straight tube at the tail end of the flow guide cover; the high-speed fan is provided with an electric heating mechanism, and the silver iodide smoke stick is provided with an ignition mechanism.

[0007] In some embodiments, a through air duct is arranged vertically at the central position of the airframe; the intake end of the wind power assembly is connected to the lower end of the air duct through a hose; during operation, air is drawn downward from the top of the airframe.

[0008] In some embodiments, a plurality of the wind power assemblies are provided, and their air outlet ends are all arranged facing outward.

[0009] In some embodiments, a plurality of groups of air guide holes are arranged around the air guide cover; the axes of the air guide holes form an acute angle with the axis of the air guide cover, so as to diffuse the airflow outward and form a negative pressure zone at the tail end.

[0010] In some embodiments, the wind power assembly further comprises: an attitude adjustment bracket; The posture adjustment bracket comprises: a clamping seat with an opening facing downward, a pitch adjustment motor arranged on one side of the clamping seat, and an azimuth adjustment motor installed under the machine body; The output end of the azimuth adjustment motor is assembled and connected to the top center of the clamping seat; fixed shafts are arranged on both sides of the outer cylinder shell of the high-speed fan, and one of the fixed shafts is drivingly connected to the output end of the pitch adjustment motor; The posture adjustment bracket is provided with a gyroscope.

[0011] In some embodiments, an expansion chamber is disposed at the top of the body; the lower end of the expansion chamber is connected to the air duct; A silver iodide supply assembly is arranged in the expansion chamber.

[0012] In some embodiments, the silver iodide supply assembly is: a multi-layer silver iodide cigarette rod mounting seat arranged around the outlet position of the induced draft duct; The top of the expansion chamber is provided with an openable and closable top opening, and the ring side of the expansion chamber is provided with a side air inlet.

[0013] In some embodiments, the silver iodide supply assembly is: a silver iodide storage bin having a channel disposed in the center corresponding to the air duct; The silver iodide storage compartment stores microcapsule-encapsulated silver iodide; A heating mechanism is arranged in the air duct.

[0014] In some embodiments, the silver iodide storage bin is provided with a discharge assembly; The silver iodide storage bin is a bucket structure and is provided with a flat bottom; the discharging assembly comprises: a plurality of vertical tubes vertically arranged at the lower end of the flat bottom and connected to the silver iodide storage bin, radial tubes connected to the lower ends of the vertical tubes, and a discharging power member arranged at the tail end of the radial tube; The inner end of the radial tube penetrates into the air duct and is provided with a pressure flap; A one-way valve is arranged in the vertical pipe to allow materials to pass only downward.

[0015] In some embodiments, the discharging power member is: a conveying auger arranged at the rear end of the radial tube; In some embodiments, the discharging power member is: an air supply ring tube connected to the rear end of the radial tube, and an air pump is provided on the air supply ring tube.

[0016] In some embodiments, an air duct is provided on the side of the fuselage; a humidity sensor is provided inside the air duct; An anemometer, a lidar and a camera are provided on the side of the fuselage.

[0017] In some embodiments, it further includes: a control system; During flight, detect the fog concentration in the area where it is located; after triggering the threshold, start the fog elimination operation; In the fog elimination operation, silver iodide is released by burning silver iodide smoke sticks in the early stage; afterwards, as the burning stage of the silver iodide smoke sticks changes, the silver iodide supply component is gradually opened to discharge materials; until the silver iodide smoke sticks are completely burned, all the silver iodide materials are provided by the silver iodide supply component; The control system controls the flight speed and the power of the wind force component in real time according to the fog concentration, the external wind force and the burning stage of the silver iodide smoke sticks, and cooperatively controls the discharging operation of the silver iodide supply component; The control system controls the discharging operation of the silver iodide supply component in real time according to the fog concentration, the external wind force and the flight speed.

[0018] Compared with the prior art, the present invention provides a low-altitude fog elimination device for drones, which has the following beneficial effects.

[0019] 1. In the present invention, multiple sensors are integrated for data fusion calculation to achieve accurate perception of the fog concentration; it not only improves the accuracy and stability of fog detection, but also provides more comprehensive and reliable information support for the fog elimination operation; through auxiliary components (such as attitude adjustment brackets, expansion chambers, silver iodide supply components, etc.), the flexibility, reliability and efficiency of the fog elimination operation are improved; according to the fog concentration and other environmental parameters, the power of the wind force component and the silver iodide release amount and other parameters are adjusted in real time to achieve a more intelligent and environment-adaptive fog elimination operation.

[0020] 2. In the present invention, a controllable air flow is formed to make the flue gas controllable and expand the range; an electric heating mechanism is provided to improve the condensation efficiency; a wind guide pipe penetrating up and down is provided to form an upward suction force; the air flow is diffused to the outside, having a larger coverage area of high-speed hot air; an expansion chamber is provided to increase the carrying capacity; silver iodide is encapsulated in microcapsules to reduce the situation of being affected by the environment and generating physical property changes during storage.

[0021] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent specification; and to some extent, based on the study of the following text, it will be obvious to those skilled in the art; or, it can be learned from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the present invention.

[0023] Figure 2 Schematic side view structure of the present invention.

[0024] Figure 3 Schematic bottom view structure of the present invention.

[0025] Figure 4 Schematic structure diagram of the wind power component.

[0026] Figure 5 Schematic structure diagram of the air outlet end of the wind power component.

[0027] Figure 6 Schematic sectional view structure of the wind power component.

[0028] Figure 7 Schematic diagram of the flow guiding form of the air guiding hole.

[0029] Figure 8 Schematic diagram of the second state of the present invention.

[0030] Figure 9 Schematic diagram of the open state of the expansion chamber.

[0031] Figure 10 Top view of the second state of the present invention.

[0032] Figure 11 Schematic diagram of the third state of the present invention.

[0033] Figure 12 Schematic bottom view structure of the silver iodide storage bin.

[0034] Figure 13 Schematic top view structure of the silver iodide storage bin.

[0035] Figure 14 Schematic bottom view structure of the silver iodide storage bin.

[0036] Figure 15 Schematic sectional view structure of the silver iodide storage bin.

[0037] In the figure: 1. Body; 11. Air intake pipe; 2. Wind power component; 21. High-speed fan; 22. Flow guiding cover; 23. Tail-end straight tube; 24. Air guiding hole; 25. Clamping seat; 26. Pitch adjustment motor; 27. Azimuth adjustment motor; 211. Outer cylinder shell; 3. Silver iodide smoke bar; 4. Expansion chamber; 41. Top opening; 42. Side air inlet; 5. Silver iodide smoke bar mounting seat; 6. Silver iodide storage bin; 7. Discharge component; 71. Vertical pipe; 72. Radial pipe; 73. Air supply ring pipe; 8. Air duct. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0039] Referring to Figures 1-15 , a low-altitude fog-eliminating device for unmanned aerial vehicles includes a fuselage 1, a wind power assembly 2 disposed below the fuselage 1, and an iodine silver smoke stick 3 installed at the outlet end of the wind power assembly 2.

[0040] Thus, a controllable air flow is formed by the wind power assembly 2 to divert the smoke generated by the iodine silver smoke stick 3, so that the diffusion of the smoke is controllable and the diffusion range is expanded; at the same time, different smoke diffusion speeds, concentrations, and coverage ranges can be formed by controlling the wind power.

[0041] As Figures 2-6 shown; the wind power assembly 2 includes: a high-speed fan 21, and a flow guide cover 22 with a rear-end contraction disposed at the air outlet end of the high-speed fan 21; an air flow is formed by the high-speed fan 21 and discharged outward after being contracted and gathered by the flow guide cover 22.

[0042] It can be understood that an outer cylinder shell 211 is disposed outside the high-speed fan 21 to form an air duct; the flow guide cover 22 is fixedly assembled at the air outlet end of the outer cylinder shell 211; air enters the outer cylinder shell 211 from the air inlet end and then is discharged through the flow guide cover 22.

[0043] In addition, the flow guide cover 22 has a tail-end straight cylinder 23, which is an integral structure with the contraction part; the iodine silver smoke stick 3 is inserted into the tail-end straight cylinder 23 of the flow guide cover 22, and the smoke is released from the outer end.

[0044] It should be noted that for the fixed form of the iodine silver smoke stick 3 and the tail-end straight cylinder 23, forms such as clamping and screw fixing can be adopted; in actual production, a suitable form is selected according to the corresponding equipment specifications; for example, screws are inserted for fixing.

[0045] It can be understood that the front end of the iodine silver smoke stick 3 cooperates with the tail-end straight cylinder 23 to form a seal; the tail-end straight cylinder 23 should have an appropriate length and be matched with an iodine silver smoke stick 3 of an appropriate specification.

[0046] Furthermore, the high-speed fan 21 is provided with an electric heating mechanism; the passing air is heated. In the case of avoiding excessive moisture adhering to the wind component 2, the formed hot air flow reduces the humidity and increases the temperature in the nearby area. The heated silver iodide is more conducive to condensing with water vapor to form ice crystals, improving the condensation efficiency (within a suitable higher temperature range, the movement of silver iodide molecules is more active, making it easier to interact with water vapor molecules in the fog, promoting the condensation of water vapor with silver iodide particles as the core, increasing the rate of catalytic nucleation, and enhancing the fog dissipation effect); when the temperature around the silver iodide smoke stick is increased by heating the air, under the same fog concentration and dosage, the number of ice crystals formed per unit time increases.

[0047] In addition, the density of hot air becomes relatively smaller, generating an upward buoyancy force to form a strong vertical air flow, which helps to carry the silver iodide smoke spread more quickly and widely in the fog, expanding its coverage area. In addition, the formed convective movement of hot air can disrupt the relatively stable air flow structure of the fog, creating more turbulence, further promoting the full mixing of the silver iodide smoke and the fog, enabling the catalytic reaction to occur in a larger spatial range, and improving the uniformity and comprehensiveness of fog dissipation.

[0048] It can be understood that the silver iodide smoke stick 3 is provided with an ignition mechanism, which is uniformly controlled by the control system of the drone; under appropriate conditions, the ignition operation is triggered.

[0049] Furthermore, two or more wind components 2 are symmetrically arranged, and the air outlet ends are all arranged facing outward; to balance the high-speed air flow to the outside.

[0050] As Figure 2 shown, for a drone in the form of a long strip, it is preferably provided with two wind components 2; for a square or circular drone, it is preferably provided with two sets of symmetric wind components 2, that is, 4 wind components 2 are arranged in a surrounding manner.

[0051] After the wind component 2 is set, the diffusion of the flue gas is efficiently controlled; through multiple symmetrically arranged wind components 2, the output air flow is also balanced; however, due to the generation of a large intake air flow, it has a certain adverse impact on the running stability of the drone itself. Therefore, considering the aerodynamic factors, the airframe 1 is modified.

[0052] Specifically, as Figure 1 shown; an air duct 11 penetrating up and down is provided at the central position of the airframe 1.

[0053] Correspondingly, the intake end of the wind component 2 is connected to the lower end of the air duct 11 through a hose; during the operation, air is drawn from the top of the airframe 1 downward; it not only does not cause adverse interference to the operation of the drone, but also forms an upward suction force, which can reduce the power demand of the drone itself and make the flight process more stable.

[0054] Correspondingly, a plurality of wind power components 2 are provided; the air inlet ends of the plurality of wind power components 2 are all connected to the air duct 11, and the air outlet ends thereof are all arranged toward the outside.

[0055] Furthermore, an electric heating mechanism is provided in the air duct 11 to dehumidify and heat the incoming air, thereby ensuring that the output airflow is within a suitable temperature range and better improving the condensation efficiency of silver iodide.

[0056] After considering the design factors of inlet and outlet airflow, we further considered optimizing the diffusion of silver iodide.

[0057] like Figures 5-7 As shown; a plurality of groups of air guide holes 24 are arranged around the air guide cover 22; and the axis of the air guide hole 24 forms an acute angle with the axis of the air guide cover 22; thereby, the air flow is diffused outward, with a larger high-speed hot air coverage area, and a negative pressure zone is formed at the tail end.

[0058] It is understandable that after being ignited, the silver iodide cigarette stick 3 generates smoke; in conventional drones, the smoke will only diffuse backwards under the influence of the flight path. In the solution of the present application, the negative pressure area at the tail end position draws the smoke forward, and then the smoke is dispersed outward by the hot air diffusing outwards, forming a large coverage area; not only the guidance of the smoke is controllable, but also the coverage of the smoke is improved.

[0059] In some embodiments, the wind power component 2 further includes: an attitude adjustment bracket.

[0060] Among them, the attitude adjustment bracket includes: a clamping seat 25 with an opening facing downward, a pitch adjustment motor 26 arranged on one side of the clamping seat 25, and an azimuth adjustment motor 27 installed under the body 1; the output end of the azimuth adjustment motor 27 is assembled and connected to the top center position of the clamping seat 25; fixed shafts are arranged on both sides of the outer cylinder shell 211 of the high-speed fan 21, and one of the fixed shafts is transmission-connected to the output end of the pitch adjustment motor 26.

[0061] Furthermore, a gyroscope is provided on the attitude adjustment bracket.

[0062] During the operation, the posture of the wind power component 2 is adjusted accordingly according to the posture of the UAV to ensure the stability of the flight and the direction of the smoke, and the entire operation process is reliable and efficient.

[0063] In the above scheme, silver iodide smoke strips 3 are used for operation; due to the structural limitations of the drone itself and in order to match the wind power component 2, only one silver iodide smoke strip 3 can be matched on one wind power component 2, so the amount of work is limited.

[0064] Based on this, we further designed the material supply of silver iodide.

[0065] As shown in Figures 8-15 Figure; an expansion chamber 4 is provided at the top of the body 1. The lower end of the expansion chamber 4 is communicated with the air guiding pipe 11, and a silver iodide supply assembly is arranged in the expansion chamber 4. By cooperating with the design of the expansion chamber 4, the carrying capacity is increased on the basis of not having a great impact on the body.

[0066] In some embodiments, the silver iodide supply assembly is: a multi-layer silver iodide smoke strip mounting seat 5 arranged around the outlet position of the air guiding pipe 11 for placing the silver iodide smoke strip 3.

[0067] It should be noted that here, due to the volume limitation of the expansion chamber 4, the silver iodide smoke strip 3 adopts a short form; the ignition mechanism is arranged in the silver iodide smoke strip mounting seat 5 to increase the amount of medicine of a single silver iodide smoke strip 3.

[0068] Correspondingly, the top of the expansion chamber 4 is provided with an openable top opening 41, and a side air inlet 42 is opened on the circumferential side of the expansion chamber 4.

[0069] It should be noted that when the top opening 41 is opened, air flows through to form an upward suction force, which cooperates with the wind power assembly 2; if it is necessary to increase the attraction force of the expansion chamber 4 for the flue gas, the top opening 41 is closed or narrowed; at this time, the flow rate of the side air inlet 42 will be increased; after the air enters from the side air inlet 42, it will carry the flue gas into the air guiding pipe 11 and then be discharged outward through the flow guiding cover 22.

[0070] Furthermore, it is matched with: a heating mechanism is arranged in the air guiding pipe 11.

[0071] It can be understood that at this time, the path of the flue gas increases, and the heating mechanism in the air guiding pipe 11 reheats the just-discharged flue gas to further activate the movement of silver iodide molecules; at the same time, the air is heated and dehumidified to ensure that the hot air is within a suitable temperature range.

[0072] In some other embodiments, the silver iodide supply assembly is: a silver iodide storage bin 6 with a channel corresponding to the air guiding pipe 11 at the center; microencapsulated silver iodide is stored in the silver iodide storage bin 6; the microencapsulation method is adopted to reduce the situation of being affected by the environment and having physical property changes during storage; at the same time, it is matched with the heating mechanism arranged in the air guiding pipe 11 to remove the outer layer after discharging the material, and the silver iodide plays a role.

[0073] Correspondingly, the silver iodide storage bin 6 is provided with a discharging assembly 7 to controllably discharge the internal materials.

[0074] Among them, the silver iodide storage bin 6 is in the shape of a hopper body and is provided with a flat bottom; the discharging assembly 7 includes: a plurality of vertical pipes 71 vertically arranged at the lower end of the flat bottom and communicating with the silver iodide storage bin 6, a radial pipe 72 communicating with the lower end of the vertical pipe 71, and a discharging power member arranged at the tail end of the radial pipe 72.

[0075] Among them, the inner end of the radial pipe 72 penetrates into the air guiding pipe 11 and is provided with a pressure flap to prevent the natural scattering of materials.

[0076] It can be understood that the pressure flap is set with an appropriate closing force; in the daily state, under the action of a force applying mechanism such as gravity or a torsion assembly, the pressure flap is pressed at the end to block the radial pipe 72; when discharging is required, the pressure flap is pushed outwards and opened to discharge the materials into the air guiding pipe 11.

[0077] In addition, a one-way valve that only allows materials to pass through downward is arranged in the vertical pipe 71 to prevent the backflow of materials.

[0078] Thus, through the plurality of radial pipes 72, not only the discharging of the silver iodide storage bin 6 is made more uniform, but also the materials entering the air guiding pipe 11 are less aggregated and more dispersed, which is beneficial to its subsequent action.

[0079] In some embodiments, the discharging power member is: a conveying auger arranged at the tail end of the radial pipe 72; through the auger conveying, the materials push open the pressure flap; by controlling the rotation speed of the conveying auger, discharging can be controlled.

[0080] In some other embodiments, the discharging power member is: an air supply ring pipe 73 communicated with the tail end of the radial pipe 72; correspondingly, an air pump is arranged on the air supply ring pipe 73; in this embodiment, the discharging power member is in a pneumatic form.

[0081] As Figures 11-15 shown; the air supply ring pipe 73 communicates with a plurality or all of the radial pipes 72; it conveys high-pressure gas, and the air flow is conveyed along the radial pipe 72, a negative pressure is formed in the vertical pipe 71, and the silver iodide materials are sucked in under the cooperation of the gravity; the silver iodide materials are washed open the pressure flap with the high-pressure gas and enter the air guiding pipe 11.

[0082] Through pneumatic discharging, the discharging speed is controllable, and there is no adhesion or blockage in the pipe, and the effect is better.

[0083] It should be noted that in the above two discharging forms, the discharging speed is variable; according to the real-time external environment, the required discharging amount is calculated and dynamically adjusted in real time.

[0084] In some embodiments, an air duct 8 is provided on the side of the airframe 1; a humidity sensor is provided inside the air duct 8; preferably, an air extraction assembly is also provided inside the air duct 8; at the same time, an anemometer, a lidar and a camera are provided on the side of the airframe 1. The external environment information is obtained through the above-mentioned multiple components, coordinated with flight control, and used for operation regulation.

[0085] Among them, the air duct 8 has a straight tube structure. When the flight direction is consistent with the axis of the air duct 8, the air flow can be directly inhaled; when the flight direction is misaligned with it, the air extraction assembly can be used to accelerate the inhalation of external air; data is obtained through the humidity sensor and the fog concentration is calculated; the anemometer obtains the external wind speed and calculates the appropriate flight speed and flight route; the camera captures images and calculates the fog concentration after processing; the lidar can not only measure the fog concentration, but also detect the change of fog in front, providing better support for operation changes.

[0086] Specifically: Use the camera to capture images, analyze the fog characteristics in the images (such as the gray value and contrast of the fog) through image processing algorithms, so as to initially judge the fog concentration; combine machine learning algorithms to train and learn the images captured by the camera, establish the mapping relationship between the fog concentration and the image characteristics, and improve the accuracy of fog concentration detection; the lidar emits laser beams and receives the reflected signals, calculates the distance and shape of the obstacles in front by measuring the propagation time and reflection intensity of the laser beams; in the fog environment, the scattering and attenuation degree of the laser beams are closely related to the fog concentration; judge the fog concentration by analyzing the reflection signal intensity of the lidar; in addition, combined with the spatial distribution information, the lidar can also provide a three-dimensional distribution map of the fog concentration, providing more comprehensive information support for the fog elimination operation, and can be used to assist in flight route planning; the humidity sensor directly measures the humidity value in the environment, reflecting the water content in the fog; the data of the humidity sensor is used as a supplement and verification of the perception results of the camera and the lidar, improving the reliability and stability of fog concentration detection.

[0087] Fuse and process the data of the camera, lidar and humidity sensor, and use algorithms such as weighted average, Kalman filter, and particle filter to comprehensively consider the advantages and limitations of each sensor to obtain more accurate and comprehensive fog concentration information; according to the fused fog concentration information, combined with environmental parameters such as wind speed, calculate parameters such as flight speed, path, and spreading amount in real time to achieve precise fog elimination.

[0088] It also includes: a control system.

[0089] Detect the fog concentration in the area during flight; start the fog elimination operation after triggering the threshold.

[0090] During the fog dissipation operation, silver iodide is released by burning silver iodide smoke sticks in the early stage; afterwards, as the burning stage of the silver iodide smoke sticks changes, the feeding of the silver iodide supply component is gradually started; until the silver iodide smoke sticks are completely burned, all the silver iodide material is provided by the silver iodide supply component.

[0091] The control system controls the flight speed and the power of the wind component in real time according to the fog concentration, the external wind force, and the burning stage of the silver iodide smoke sticks, and coordinates the control of the feeding operation of the silver iodide supply component; the control system controls the feeding operation of the silver iodide supply component in real time according to the fog concentration, the external wind force, and the flight speed.

[0092] The specific process is as follows.

[0093] After the low-altitude fog dissipation device of the unmanned aerial vehicle is started, the unmanned aerial vehicle climbs and approaches the fog area; according to the data such as the fog concentration and the external wind force real-time monitored by sensors such as lidar, cameras, and humidity sensors, it is determined whether fog dissipation operation is required (in areas with low fog concentration and strong wind, fog dissipation operation may not be carried out); if required, the burning process of the silver iodide smoke sticks is started.

[0094] During the burning process of the smoke sticks, the fog concentration, the external wind force, and the burning stage of the silver iodide smoke sticks are monitored in real time; according to these data, the flight speed of the unmanned aerial vehicle and the power of the wind component are dynamically adjusted to ensure that the generated silver iodide particles are effectively diffused into the fog. For example, when the fog concentration is high and the external wind force is small, the flight speed is appropriately reduced and the power of the wind component is increased, so that the particles generated by the burning of the silver iodide smoke sticks can be better diffused into the fog, improving the fog dissipation effect.

[0095] At the end of the burning of the smoke sticks, the amount of flue gas decreases, and the feeding operation of the silver iodide supply component is coordinated to ensure the amount of silver iodide particles and guarantee the fog dissipation effect; at this time, according to the pre-set flue gas volume change model, as well as the actual fog concentration, external wind force, unmanned aerial vehicle flight state, etc., the feeding amount and feeding speed of the silver iodide supply component are precisely controlled to achieve the best fog dissipation effect.

[0096] After the smoke sticks are completely burned, only the silver iodide supply component provides silver iodide; in the subsequent fog dissipation operation, the data such as the fog concentration, the external wind force, and the flight speed are continuously monitored in real time, and the feeding amount and feeding speed of the silver iodide supply component are dynamically adjusted according to these data to ensure that the silver iodide particles can be continuously and evenly dispersed into the fog, achieving a continuous and effective fog dissipation effect. For example, when the fog concentration decreases and the external wind force increases, the control system will appropriately reduce the feeding amount of the silver iodide supply component and lower the feeding speed to avoid excessive dispersion of the silver iodide particles and also save the usage amount of silver iodide.

[0097] Through the synergistic effect of the early-stage burning of the smoke stick and the late-stage silver iodide supply component, as well as the real-time adjustment of the control system, the low-altitude fog-eliminating device of the unmanned aerial vehicle can efficiently and reliably eliminate fog; it can adapt to different fog concentrations, external wind forces and flight states, and has strong adaptability and flexibility; it can monitor and adjust various parameters in real time to ensure the amount and coverage of silver iodide particles, improve the fog-eliminating effect, and save the usage of silver iodide.

[0098] In addition, we designed an example adjustment algorithm accordingly.

[0099] Flight speed adjustment: The fog concentration and external wind speed are monitored in real time through sensors (anemometer, lidar, camera, humidity sensor, etc.) carried by the unmanned aerial vehicle; according to the monitoring data and combined with the pre-set flight speed adjustment strategy, the control system dynamically adjusts the flight speed of the unmanned aerial vehicle to ensure that the silver iodide particles can be effectively diffused into the fog.

[0100] V = V max × ( (( C max - C ) / C max ) × ( (( W max - W ) / W max ) Where, V is the adjusted flight speed, V max is the maximum flight speed, C is the current fog concentration, C max is the maximum fog concentration threshold, W is the current wind speed, W max is the maximum wind speed threshold.

[0101] Fan power adjustment: According to the fog concentration and external wind speed, the control system adjusts the power of the wind component in real time; when the fog concentration is high and the external wind speed is low, the fan power is increased to enhance the air flow to help the silver iodide particles diffuse better; when the fog concentration is low and the external wind speed is high, the fan power is reduced.

[0102] P = P min + ( ( P max - P min ) × ( C / C max ) × ( ((W max - W ) / W max ) Among them, P is the adjusted fan power, P min is the minimum fan power, P max is the maximum fan power, C is the current fog concentration, C max is the maximum fog concentration threshold, W is the current wind speed, W max is the maximum wind speed threshold.

[0103] Seeding rate adjustment: According to parameters such as fog concentration, external wind speed, and flight speed, the control system calculates the required silver iodide seeding rate in real time; when the fog concentration is high and the external wind speed is low, the seeding rate is increased to ensure the fog dissipation effect; when the fog concentration is low and the external wind speed is high, the seeding rate is reduced to save silver iodide.

[0104] Q = Q min +( Q max - Q min )×( C / C max )×(( W max - W ) / W max ) Among them, Q is the adjusted seeding rate, Q min is the minimum seeding rate, Q max is the maximum seeding rate, C is the current fog concentration, C max is the maximum fog concentration threshold, W is the current wind speed, W max is the maximum wind speed threshold.

[0105] In the present invention, multiple sensors are integrated for data fusion calculation to achieve accurate perception of fog concentration, which not only improves the accuracy and stability of fog detection, but also provides more comprehensive and reliable information support for fog elimination operations. Through auxiliary components (such as attitude adjustment brackets, expansion chambers, silver iodide supply components, etc.), the flexibility, reliability and efficiency of fog elimination operations are improved. According to the fog concentration and other environmental parameters, parameters such as the power of the wind force component and the silver iodide release amount are adjusted in real time to achieve more intelligent and environment-adaptive fog elimination operations.

[0106] In the present invention, a controllable air flow is formed by the wind force component 2, so that the flue gas is controllable and the range is expanded, and different flue gas diffusion speeds, concentrations and coverage ranges can be formed. The flow guide cover 22 cooperates with the silver iodide smoke stick 3 to further disperse the flue gas. An electric heating mechanism is set to improve the condensation efficiency. The hot air forms a vertical air flow, and the flue gas diffuses more quickly and widely in the fog. At the same time, turbulence is formed to promote the full mixing of silver iodide smoke and fog. The air duct 11 penetrating up and down is set, which does not cause adverse interference to the operation of the unmanned aerial vehicle, and also forms an upward suction force, which can reduce the power demand of the unmanned aerial vehicle itself. The air flow is diffused outward, with a larger coverage area of high-speed hot air, and a negative pressure area is formed at the tail end position. The attitude adjustment bracket ensures the flight stability and adjusts the flue gas orientation, and the whole operation process is reliable and efficient. An expansion chamber 4 is set to increase the carrying capacity. The flow rate of the side air inlet 42 is increased to carry the flue gas into the air duct 11. The silver iodide is encapsulated in microcapsules to reduce the influence of the environment during storage and the occurrence of physical property changes. After discharging, the outer layer is removed and the silver iodide plays a role. Multiple components obtain external environmental information, cooperate with flight control, and perform operation regulation.

[0107] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A low-altitude fog-eliminating device for unmanned aerial vehicles, characterized in that: It comprises a machine body (1), a wind power assembly (2) arranged below the machine body (1), and a silver iodide smoke strip (3) installed at the outlet end of the wind power assembly (2); The wind power assembly (2) comprises: a high-speed fan (21), and a retracted air guide cover (22) arranged at the rear end of the air outlet of the high-speed fan (21); the silver iodide cigarette rod (3) is inserted into the rear end straight tube (23) of the air guide cover (22); the high-speed fan (21) is provided with an electric heating mechanism, and the silver iodide cigarette rod (3) is provided with an ignition mechanism.

2. The low-altitude fog-eliminating device for unmanned aerial vehicles according to claim 1, characterized in that: An air duct (11) penetrating vertically is provided at the center of the machine body (1); the air inlet end of the wind power assembly (2) is connected to the lower end of the air duct (11) via a hose; during operation, air is drawn downward from the top of the machine body (1).

3. The low-altitude fog-eliminating device for unmanned aerial vehicles according to claim 1 or 2, characterized in that: The wind force components (2) are provided in plurality, and their air outlet ends are all arranged toward the outside.

4. The low-altitude fog-eliminating device for unmanned aerial vehicles according to claim 1, characterized in that: The air guide cover (22) is provided with a plurality of groups of air guide holes (24) around it; the axes of the air guide holes (24) and the axis of the air guide cover (22) form an acute angle, so that the airflow is diffused outwards to form a negative pressure zone at the rear end.

5. The low-altitude fog-eliminating device for unmanned aerial vehicles according to claim 1, characterized in that: The wind power component (2) further comprises: a posture adjustment bracket; The posture adjustment bracket comprises: a clamping seat (25) with an opening facing downward, a pitch adjustment motor (26) arranged on one side of the clamping seat (25), and an azimuth adjustment motor (27) installed below the machine body (1); The output end of the azimuth adjustment motor (27) is assembled and connected to the top center position of the clamping seat (25); fixed shafts are arranged on both sides of the outer cylinder shell (211) of the high-speed fan (21), and one of the fixed shafts is drivingly connected to the output end of the pitch adjustment motor (26); The posture adjustment bracket is provided with a gyroscope.

6. The low-altitude fog-eliminating device for unmanned aerial vehicles according to claim 2, characterized in that: An expansion chamber (4) is provided at the top of the machine body (1); the lower end of the expansion chamber (4) is in communication with an air duct (11); A silver iodide supply component is arranged in the expansion chamber (4).

7. The low-altitude fog-eliminating device for unmanned aerial vehicles according to claim 6, characterized in that: The silver iodide supply assembly comprises: a multi-layer silver iodide cigarette rod mounting seat (5) arranged around the outlet position of the air duct (11); The top of the expansion chamber (4) is provided with an openable and closable top opening (41), and the annular side of the expansion chamber (4) is provided with a side air inlet (42).

8. The low-altitude fog-eliminating device for unmanned aerial vehicles according to claim 6, characterized in that: The silver iodide supply component comprises: a silver iodide storage bin (6) with a channel arranged in the center corresponding to the air duct (11); The silver iodide storage chamber (6) stores microcapsule-encapsulated silver iodide; A heating mechanism is provided in the air duct (11).

9. The low-altitude fog-eliminating device for unmanned aerial vehicles according to claim 8, characterized in that: The silver iodide storage bin (6) is provided with a discharge assembly (7); The silver iodide storage bin (6) is a bucket structure and is provided with a flat bottom; the discharge assembly (7) comprises: a plurality of vertical tubes (71) vertically arranged at the lower end of the flat bottom and connected to the silver iodide storage bin (6), radial tubes (72) arranged at the lower ends of the vertical tubes (71), and a discharge power member arranged at the rear ends of the radial tubes (72); The inner end of the radial tube (72) penetrates into the air duct (11) and is provided with a pressure flap; The vertical pipe (71) is provided with a one-way valve that allows materials to pass only downward.

10. The low-altitude fog-eliminating device for unmanned aerial vehicles according to claim 1, characterized in that: Also includes: Control system; detects fog concentration in the area during flight; starts defogging operation after the threshold is triggered; In the fog removal operation, silver iodide cigarette sticks are burned to release silver iodide in the early stage; then, as the burning stage of the silver iodide cigarette stick changes, the silver iodide supply component is gradually turned on to discharge the material; until the silver iodide cigarette stick is completely burned, the silver iodide supply component provides all the silver iodide materials; The control system controls the flight speed and the power of the wind power component in real time according to the fog concentration, external wind force, and the combustion stage of the silver iodide tobacco rod, and controls the discharging operation of the silver iodide supply component in real time; the control system controls the discharging operation of the silver iodide supply component in real time according to the fog concentration, external wind force, and the flight speed.

Images