Low-altitude spraying operation system
By setting the weight and length of the movable part in the low-altitude spraying system, the problems of overload and disturbance in drone spraying operations are solved, achieving efficient and safe low-altitude spraying operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- WANXUN TECH (SHENZHEN) CO LTD
- Filing Date
- 2024-11-11
- Publication Date
- 2026-05-12
AI Technical Summary
Existing low-altitude spraying operations rely on manual labor, which is inefficient, costly, and poses safety risks. In addition, drone spraying operations suffer from large lateral disturbances and are prone to overloading.
A low-altitude spraying operation system was designed, including an aircraft, a spraying device, a hose, and a tow rope. The weight and length of the movable part are preset according to the maximum load and the shortest safe distance of the aircraft to ensure that the aircraft is not overloaded, and the lateral tension of the hose movable part resists disturbances.
It effectively reduces lateral disturbances during low-altitude spraying operations by drones, improves operational safety, avoids aircraft overload, and ensures operational stability and safety.
Smart Images
Figure CN122009489A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of low-altitude operation technology, and in particular relates to a low-altitude spraying operation system. Background Technology
[0002] Low-altitude spraying operations are widely used in low-altitude work scenarios in industries such as energy and power, building inspection, and wind power operation and maintenance. For example, in the energy and power industry, low-altitude spraying can be used for equipment cleaning, touch-up painting, rust removal, and other maintenance work; for hotels and apartments, low-altitude spraying is mainly used for wall cleaning.
[0003] Currently, low-altitude spraying still relies heavily on traditional manual operations, which is not only inefficient and costly, but also poses certain safety risks.
[0004] With the expansion of drone application scenarios, low-altitude spraying operations are gradually being carried out by drones instead of manual labor. However, due to the limited weight of drones and the influence of various adverse factors in the working environment, there are still problems such as large lateral disturbances and drone overloading during low-altitude spraying operations. Summary of the Invention
[0005] In view of this, embodiments of this application provide a low-altitude spraying operation system to reduce lateral disturbances during low-altitude spraying operations by drones and improve operational safety.
[0006] This application provides a low-altitude spraying operation system, including: an aircraft, a spraying device connected to the aircraft's mounting area, a hose located at a high position and connected to the spraying device's inlet, and a traction rope located at a low position and connected to the hose. The hose includes: a movable part located near the aircraft and a fixed part located away from the aircraft, with the movable part and the fixed part separated by the connection point between the hose and the traction rope.
[0007] The weight of the movable part is preset based on the maximum load of the aircraft, and the length of the movable part is preset based on the shortest safe distance between the aircraft and the work surface. The maximum load of the aircraft is greater than the weight load of the spraying device, the weight load distributed across the aircraft by the movable part, and the external force load formed by the lateral tension of the movable part. The length of the movable part is greater than the shortest safe distance between the aircraft and the work surface minus the horizontal distance between the connection point and the work surface, and the length of the movable part is positively correlated with its weight. The lateral tension is formed when the movable part bends and varies with the bending angle.
[0008] Compared with the prior art, the embodiments of this application have the following advantages:
[0009] In this embodiment, the weight of the movable part of the aircraft hose is preset based on the maximum load of the aircraft, and the length of the movable part is preset based on the shortest safe distance between the aircraft and the work surface. The maximum load of the aircraft is greater than the sum of the weight load of the spraying device, the weight load distributed to the aircraft by the movable part, and the external force load formed by the lateral tension of the movable part, so as to avoid overloading the aircraft and enable the aircraft to resist the lateral disturbance of the hose. The length of the movable part is greater than the shortest safe distance between the aircraft and the work surface minus the horizontal distance between the connection point and the work surface. The length of the movable part is positively correlated with its weight, further ensuring the safety of aircraft operation. Attached Figure Description
[0010] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.
[0011] Figure 1 This is a schematic diagram of a low-altitude spraying operation system provided in an embodiment of this application;
[0012] Figure 2 This is a schematic diagram of another low-altitude spraying operation system provided in the embodiments of this application;
[0013] Figure 3 This is a schematic diagram of another low-altitude spraying operation system provided in the embodiments of this application. Detailed Implementation
[0014] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.
[0015] The technical solution of this application will be described below through specific embodiments.
[0016] Reference Figure 1 The diagram shows a schematic of a low-altitude spraying system provided in an embodiment of this application.
[0017] The low-altitude spraying system described in this embodiment includes an aircraft, a spraying device connected to the aircraft's mounting area, a hose located at a high position and connected to the spraying device's inlet, and a tow rope located at a low position and connected to the hose. The hose includes a movable part located near the aircraft and a fixed part located away from the aircraft, with the movable part and the fixed part separated by the connection point between the hose and the tow rope.
[0018] The weight of the movable part is preset based on the maximum load of the aircraft, and the length of the movable part is preset based on the shortest safe distance between the aircraft and the work surface. The maximum load of the aircraft is greater than the weight load of the spraying device, the weight load distributed across the aircraft by the movable part, and the external force load formed by the lateral tension of the movable part. The length of the movable part is greater than the shortest safe distance between the aircraft and the work surface minus the horizontal distance between the connection point and the work surface, and the length of the movable part is positively correlated with its weight. The lateral tension is formed when the movable part bends and varies with the bending angle.
[0019] In the above embodiments, the maximum load of the aircraft is greater than the sum of the weight load of the spraying device, the weight load distributed to the aircraft by the movable part, and the external force load formed by the lateral tension of the movable part. This can effectively prevent the aircraft from being overloaded and enable the aircraft to resist the lateral disturbance of the hose.
[0020] In this embodiment, the bending angle of the movable part changes with the position of the aircraft and the connection point;
[0021] And / or,
[0022] The bending angle of the movable part changes due to wind resistance.
[0023] For example, when the aircraft moves closer to the connection point, the bending angle of the movable part decreases; conversely, when the aircraft moves away from the connection point, the bending angle of the movable part increases.
[0024] For example, when the wind resistance is high, the movable part will swing due to the wind resistance, and the bending angle of the movable part will also change accordingly.
[0025] In this embodiment, the bending angle of the movable part is related to the lateral distance between the connection point and the aircraft.
[0026] For example, when the lateral distance between the connection point and the aircraft decreases, the bending angle of the movable part decreases; conversely, when the lateral distance between the connection point and the aircraft increases, the bending angle of the movable part increases.
[0027] In this embodiment, the weight load distributed to the aircraft by the active portion is related to the longitudinal height difference between the connection point and the aircraft.
[0028] For example, when the connection point is higher than the aircraft, the weight load borne by the moving part on the aircraft is half the weight of the moving part minus the weight corresponding to the longitudinal height difference between the two parts; conversely, when the connection point is lower than the aircraft, the weight load borne by the moving part on the aircraft is half the weight of the moving part plus the weight corresponding to the longitudinal height difference between the two parts.
[0029] In this embodiment, the connection point is adaptively adjusted as the flight altitude of the aircraft changes.
[0030] For example, when the flight altitude of the aircraft increases, the height of the connection point may also increase accordingly; when the flight altitude of the aircraft decreases, the height of the connection point may also decrease when it decreases to a certain extent.
[0031] Please refer to the above as well. Figure 2 The diagram shows another low-altitude spraying system provided in an embodiment of this application.
[0032] In this embodiment, the high outlet of the hose is taken as the origin, and the most prominent point on the side of the low-altitude facade is taken as the tangent point. The intersection point formed by extending downward to the ground is defined as the fixing point of the second retractor, which can prevent the hose from getting stuck.
[0033] In this embodiment, the hose is retracted and extended via a first retractor, and the traction rope is retracted and extended via a second retractor. By controlling the rotation of the first and second retractors, the fixed part and the traction rope can be pulled against each other to prevent the fixed part from swinging and affecting the stability of the aircraft.
[0034] In this embodiment, the water source and pump are both located on the roof. This ensures that the spray pressure is not affected by altitude and may even increase as the aircraft descends. The additional pressure due to altitude is calculated as ρg(roof height from ground level - actual aircraft altitude).
[0035] In addition, taking low-altitude spraying operations on buildings as an example, personnel on the roof can first use the first retractor to lower the hose end to the ground floor. Personnel on the ground floor then use a self-made clamp to secure the hose end to the traction rope. The spraying equipment is then connected to the connection point via a 10-20m long high-pressure water hose (the movable part). Using a drone as the aircraft, after takeoff, the rooftop retracts the hose while the ground floor simultaneously lowers it, ensuring the connection point is approximately level with the drone (+ / -10m), thus keeping the water hose load directly borne by the drone below 10m. Furthermore, the mutual tension between the two retractors on the rooftop and ground floor keeps the hose and traction rope taut and prevents them from touching the wall, ensuring the drone avoids accidental hose jamming due to wall protrusions during ascent and descent. Additionally, if the hose becomes stuck due to misoperation, the spraying equipment itself is equipped with an emergency hose release device to prevent a crash.
[0036] Furthermore, the speed of retracting and extending the tube should not exceed the drone's maximum takeoff and landing speed.
[0037] Please refer to the above as well. Figure 3 The diagram shows another low-altitude spraying system provided in an embodiment of this application.
[0038] When using drones for low-altitude spraying of buildings, assuming the hose length is L, the tow rope length is L, the height of the highest point on the roof from the ground is H, the height of the protruding object on the wall is (t1...tn), the height of the protruding object from the ground is (h1...hn), the distance between the second ground-based retractor and the wall is S, and the shortest safe distance between the first ground-based retractor and the edge of the outer wall is K, then:
[0039] S>max(H*tn / (H-hn)), and L=(H^2+S^2)^1 / 2+K.
[0040] The above configuration can effectively prevent pipe jamming, thereby improving operational safety.
[0041] Assuming the length of the high-pressure hose extending from the connection point between the tow rope and the flexible hose to the drone is R, the minimum safe operating distance between the drone and the wall is A, the weight per meter of the tow rope is G, the weight of the spraying equipment is g, and the nominal load of the drone is W, then:
[0042] 1) To ensure operational safety, it is essential to ensure that R > A;
[0043] 2) Due to the limited load-bearing capacity of the drone itself, in order to ensure the safety of the drone under load, R <= (Wg) / G should be satisfied;
[0044] 3) When selecting drones, the requirement (Wg) / G>A must also be met.
[0045] As can be seen from the above technical solutions, in this embodiment, the weight of the movable part of the aircraft hose is preset based on the maximum load of the aircraft, and the length of the movable part is preset based on the shortest safe distance between the aircraft and the working surface. The maximum load of the aircraft is greater than the sum of the weight load of the spraying device, the weight load distributed to the aircraft by the movable part, and the external force load formed by the lateral tension of the movable part, so as to avoid overloading the aircraft and enable the aircraft to resist the lateral disturbance of the hose. The length of the movable part is greater than the shortest safe distance between the aircraft and the working surface minus the horizontal distance between the connection point and the working surface. The length of the movable part is positively correlated with its weight, further ensuring the safety of aircraft operation.
[0046] The embodiments described above are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.
Claims
1. A low-altitude spraying operation system, characterized in that, include: An aircraft, a spraying device connected to the aircraft's mounting area, a hose located at a high position and connected to the spraying device's inlet, and a traction rope located at a low position and connected to the hose. The hose includes a movable part located near the aircraft and a fixed part located away from the aircraft, with the movable part and the fixed part separated by the connection point between the hose and the traction rope. The weight of the movable part is preset based on the maximum load of the aircraft, and the length of the movable part is preset based on the shortest safe distance between the aircraft and the work surface. The maximum load of the aircraft is greater than the weight load of the spraying device, the weight load distributed across the aircraft by the movable part, and the external force load formed by the lateral tension of the movable part. The length of the movable part is greater than the shortest safe distance between the aircraft and the work surface minus the horizontal distance between the connection point and the work surface, and the length of the movable part is positively correlated with its weight. The lateral tension is formed when the movable part bends and varies with the bending angle.
2. The system according to claim 1, characterized in that, The bending angle of the movable part changes with the position of the aircraft and the connection point; And / or, The bending angle of the movable part changes due to wind resistance.
3. The system according to claim 2, characterized in that, The bending angle of the movable part is related to the lateral distance between the connection point and the aircraft.
4. The system according to claim 2, characterized in that, The weight load distributed to the aircraft by the active portion is related to the difference in longitudinal altitude between the connection point and the aircraft.
5. The system according to claim 1, characterized in that, Taking the high outlet of the hose as the origin and the most prominent point on the side of the low-altitude facade as the tangent point, the intersection formed by extending downwards to the ground is defined as the fixing point of the second retractor, which can prevent the hose from getting stuck.
6. The system according to claim 5, characterized in that, The hose is retracted and extended via a first retractor, and the traction rope is retracted and extended via a second retractor. By controlling the rotation of the first and second retractors, the fixed part and the traction rope can be pulled against each other to prevent the fixed part from swinging and affecting the stability of the aircraft.
7. The system according to claim 6, characterized in that, The connection point adaptively adjusts as the aircraft's flight altitude changes.