A suspension counterweight type damping interception net against small unmanned aerial vehicle invasion

Abstract

This invention discloses a suspended counterweight damping interception net for resisting attacks by small unmanned aerial vehicles (UAVs), comprising a column (1), corner pieces (2), springs (3), a mesh surface (4), a base (5), bolts (6), counterweights (7), latches (8), a crossbeam (9), a pin (10), and hooks (11). The upper edge of the mesh surface (4) is suspended from the crossbeam (9), and the lower edge is connected to the counterweights (7). The counterweights (7) are connected to the column (1) and the ground on the left, right, and lower sides via horizontal and vertical springs (3). Upon impact, the displacement of the counterweights (7) drives the springs (3) to reciprocate, generating mechanical damping through friction between adjacent spring coils. After impact, the counterweights (7) reset under the combined action of gravity and spring restoring force, forming a gravity-spring coupled reset structure, achieving rapid and stable reset and continuous interception.

Description

Technical Field

[0001] This invention relates to the field of small drone prevention and physical interception equipment technology, specifically to a suspended counterweight damping interception net for resisting small drone attacks. Background Technology

[0002] In the field of physical interception of small drones, existing interception systems suffer from the following technical shortcomings in practical applications: First, in terms of manufacturing costs, traditional systems often rely on electromechanical drives or hydraulic buffer devices, involving multiple subsystems and resulting in high manufacturing costs. Second, regarding the ease of system deployment, existing main frames often employ on-site welding or direct concrete embedding, making independent assembly and disassembly impossible, leading to low transportation and on-site deployment efficiency and failing to meet the rapid deployment requirements for drone control in various scenarios. Third, traditional interception nets often use rigid fixed boundaries on all four sides, lacking displacement margin when impacted by small drones, resulting in localized stress concentrations that can cause net wire breakage or damage to the posts. Finally, in terms of maintenance costs, after being stretched by drone impacts, traditional interception nets are prone to permanent deformation and slack, requiring manual re-tensioning and resetting. Furthermore, traditional interception structures do not utilize the physical damping of springs, causing the net surface to oscillate back and forth after impact, making it difficult to quickly return to an interception-ready state.

[0003] The suspended counterweight damping interception net proposed in this invention for resisting small drone attacks has the following technical advantages: First, this device operates using gravitational potential energy and a purely mechanical spring structure, replacing electromechanical buffer devices and reducing the manufacturing cost of the small drone interception system. Second, each core component is assembled using bolts, pins, and buckles, achieving independent separation and detachable connection of the columns and beams, improving the convenience of deployment at control points. Third, by eliminating the rigid fixed constraints at the bottom and sides of the net surface, the net surface deformation drives the counterweight to dissipate impact kinetic energy when impacted by a small drone. Finally, after the impact load disappears, the net surface is automatically reset without manual intervention by the falling weight of the counterweight and the spring contraction force, reducing subsequent maintenance costs. During system operation, this device utilizes the physical friction damping generated by the deformation of the spring itself to consume vibration energy, reduce the net surface swaying time, and quickly and stably reset without the need for additional damping components, meeting the requirements for continuous interception. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a suspended counterweight damping interception net to resist attacks from small drones. This solves the technical problems of high manufacturing costs, inability to be independently disassembled and assembled, component damage due to rigid constraints, and the need for manual re-tensioning and resetting after impact in existing small drone interception systems. Simultaneously, it utilizes the frictional damping generated by the spring's own structure to reduce the net's swaying time, thus resolving the problem of the system oscillating back and forth after impact and failing to quickly return to the interception state.

[0005] The technical solution adopted in this invention is: a suspended counterweight damping interception net for resisting attacks by small drones, comprising: a column (1), corner pieces (2), a spring (3), a mesh surface (4), a base (5), bolts (6), a counterweight (7), a latch (8), a crossbeam (9), a pin (10), and hooks (11); two columns (1) are provided, symmetrically distributed on the left and right sides of the mesh surface (4); the bottom of the column (1) is connected to the base (5), and the base (5) is fixed to the foundation by bolts (6); two corner pieces (2) are provided, respectively fixed to the top of the two columns (1), with symmetrical structures on the left and right sides; the two ends of the crossbeam (9) are respectively inserted into the two corner pieces (2) and fixed by pins (10), and are horizontally erected above the two columns (1); the upper edge of the mesh surface (4) is suspended under the crossbeam (9) by multiple hooks (11); the mesh surface (4) The lower edge is connected to the counterweight (7) by a plurality of hooks (11), the counterweight (7) being a solid mass block that provides downward gravity traction; the left and right sides of the counterweight (7) are connected to the corresponding side columns (1) by horizontally arranged springs (3); the lower side of the counterweight (7) is connected to the ground by vertically arranged springs (3); both ends of the springs (3) are connected to the latches (8). When the mesh (4) is deformed by the impact of a small drone, it drives the counterweight (7) to move. During the reciprocating deformation process of the counterweight (7) as it stretches and contracts, the spring (3) generates mechanical damping by the physical friction between its adjacent spring coils, which consumes the vibration energy of the system, reduces the swaying time of the mesh (4), and suppresses the reciprocating swaying of the system. After the impact load disappears, the counterweight (7) falls back under the action of gravity, and the elastic contraction force of the spring (3) is superimposed to drive the mesh (4) to return to the vertical tension state.

[0006] Furthermore, the corner piece (2) is a right-angle sleeve, with one end sleeved to the top of the column (1) and the other end sleeved to the end of the crossbeam (9).

[0007] Furthermore, the latches (8) at both ends of the spring (3) are detachably connected to the counterweight (7), the column (1), and the ground embedded parts, respectively.

[0008] Furthermore, the spring (3) is a cylindrical helical tension spring; the mechanical damping is generated by the displacement of the counterweight (7) driving the spring (3) to reciprocate under the constraint of the suspended counterweight-spring coupling, and the physical friction between the adjacent spring wires and spring coils of the spring (3) converts the system's kinetic energy into heat energy dissipation.

[0009] Furthermore, the mesh (4) is woven from high-strength fiber rope, and the mesh openings are rhomboid or square.

[0010] Furthermore, the initial equilibrium state is as follows: the mesh surface (4) is in a vertical tension state under the gravity traction of the counterweight (7), and all the springs (3) are in a pre-tension state that provides initial tensile force to eliminate the empty stroke of the force.

[0011] The counterweight (7) of the present invention adopts a prefabricated structure setting with low cost, convenient layout and easy maintenance, and uses cast iron, cast steel, reinforced concrete and high-density composite counterweight materials. Among them, the high-density composite counterweight material adopts a closed metal shell and is filled with one or more materials among barite, iron ore sand and sand. This type of filler is easy to obtain, does not require special maintenance and is easy to prefabricate in batches. The applicable working conditions of each material are as follows: reinforced concrete has low cost and is suitable for large-area fixed prevention and control scenarios with low operation and maintenance costs; cast iron and cast steel have regular structures and are not easily deformed. They can be prefabricated in a modular manner and are convenient to disassemble and transport on site, and are suitable for conventional prevention and control working conditions; the weight of high-density composite counterweight material can be matched as needed, the components are highly versatile and can be replaced and maintained individually, and are suitable for narrow spaces and complex outdoor working conditions. The present invention completes the load matching design through a multi-point suspension assembly structure, so that the suspension load and static stress of various counterweight blocks match the allowable stress range of the mesh and hooks, evenly distributes the load, avoids stress concentration, avoids damage to the mesh caused by the counterweight's own weight from the structural level, and ensures the structural integrity of the mesh for long-term suspension.

[0012] The mesh (4) is a protective structure for intercepting small drones, woven from high-strength fiber ropes, which are high-strength polyethylene fiber ropes or aramid fiber ropes. The mesh (4) can be woven using plain weave, twill weave, twisted weave, knotted weave, warp knitting knotless weave, or bidirectional integrated stretching molding processes. Knotted weave can use single dead knots, double dead knots, lock knots, and other knot reinforcement structures. The mesh can use diamond, square, or hexagonal mesh structures. The attached figure shows an embodiment of the present invention, which uses a square uniform integrated woven mesh structure. This structure has a regular and balanced stress distribution and is suitable for routine interception of small and medium-sized drones. Different weaving processes, knot structures, and mesh structures can be applied to small drones of different sizes, speeds, and impact kinetic energies, covering various interception conditions.

[0013] The present invention has the following beneficial effects:

[0014] Buffering and damping vibration suppression mechanism: The mesh (4) adopts a suspended structure that only constrains the upper edge, eliminating the rigid fixed constraints at the bottom and sides. When subjected to the impact load of a small UAV, the mesh (4) deforms, driving the counterweight (7) to displace. The impact kinetic energy is converted into the gravitational potential energy of the counterweight (7) and the elastic potential energy of the spring (3) being stretched. During this stretching process, the adjacent spring wires and coils of the cylindrical helical tension spring (3) generate physical friction between each other, forming mechanical damping. This damping effect can continuously convert the vibration energy of the system into heat energy for consumption, reducing the swaying time of the mesh (4), suppressing the reciprocating swaying of the mesh, and eliminating the need for additional damping components.

[0015] Automatic Reset and Rapid Stabilization: After the small drone impact ends and the external load disappears, the raised counterweight (7) falls downward under the action of gravity. Combined with the elastic contraction force generated by the spring (3), it drives the net surface (4) to return to the vertical tension state. During the system's fall-back reset process, the physical friction damping in the spring coil of the spring (3) continues to play a role, consuming the residual vibration energy, so that the system can quickly come to a stop and stabilize after reset, returning to the interception state without the need for secondary manual operation.

[0016] Fully prefabricated structure: The device uses plug-in joints and pins (10) for positioning between the columns (1), beams (9), and corner pieces (2). The upper and lower edges of the mesh (4) are connected by hooks (11), and the latches (8) at both ends of the springs (3) are fastened to the main body. All core components are detachable, realizing a fully prefabricated design with independent separation and replacement functions. It is suitable for rapid deployment and dismantling in different prevention and control scenarios, reducing installation and subsequent maintenance costs. Attached Figure Description

[0017] Figure 1 is an overall front view according to an embodiment of the present invention.

[0018] Figure 2 is an overall top view according to an embodiment of the present invention.

[0019] Figure 3 is an overall side view according to an embodiment of the present invention.

[0020] Figure 4 is an enlarged view of the connection between the corner piece and the column and beam according to an embodiment of the present invention.

[0021] Figure 5 is an enlarged view of the side spring connection portion according to an embodiment of the present invention.

[0022] Figure 6 is an enlarged view of the bottom spring connection portion according to an embodiment of the present invention.

[0023] Figure 7 is an enlarged view of the connection between the column and the base according to an embodiment of the present invention.

[0024] Figure 8 is an enlarged view of the mesh surface connected by hooks according to an embodiment of the present invention. The square, uniform, and regular mesh structure shown is an implementation structure adopted in an embodiment of the present invention.

[0025] In the diagram: column (1), corner piece (2), spring (3), mesh surface (4), base (5), bolt (6), counterweight (7), lock (8), crossbeam (9), pin (10), hook (11). Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] As shown in Figures 1 to 8, one embodiment of the present invention includes a column (1), a corner piece (2), a spring (3), a mesh surface (4), a base (5), a bolt (6), a counterweight (7), a latch (8), a crossbeam (9), a pin (10), and a hook (11). Two columns (1) are symmetrically arranged on the left and right sides of the mesh surface (4).

[0028] Referring to Figures 1, 3 and 7, the lower end of the column (1) is connected to the base (5). The base (5) has holes and is fixed to the foundation embedded parts by bolts (6).

[0029] Referring to Figures 1, 2, and 4, corner pieces (2) are fitted onto the tops of the two columns (1), with identical structures on both sides. The corner pieces (2) are right-angle sleeves. The two ends of the crossbeam (9) are inserted into the corner pieces (2) and fixed by pins (10). The crossbeam (9) is horizontally erected above the two columns (1).

[0030] Referring to Figures 1 and 8, the mesh surface (4) has a mesh structure. The upper edge of the mesh surface (4) is suspended from hooks (11) evenly distributed on the lower side of the crossbeam (9). The lower edge of the mesh surface (4) is also connected to the counterweight (7) through multiple evenly distributed hooks (11). The counterweight (7) is a solid mass block used to provide downward gravity traction.

[0031] In one embodiment of the present invention, the counterweight block adopts a low-cost and easy-to-maintain material selection design, using cast iron, cast steel, reinforced concrete, and high-density composite counterweight materials as the main materials; the high-density composite counterweight material adopts a metal shell structure, and is filled with low-cost, easy-to-prefabricate, and maintenance-free high-density fillers such as barite, iron ore sand, and gravel. All materials meet the requirements of standardized prefabrication, easy on-site disassembly and assembly, and strong versatility of the prefabricated design, which can effectively reduce manufacturing costs, simplify the deployment process, and reduce maintenance workload, and is suitable for various outdoor deployment and UAV interception conditions. This device achieves load matching through a multi-point distributed suspension structure, evenly distributing the load and avoiding stress concentration. It matches the upper limit of the mesh surface bearing capacity based on the inherent mechanical properties of the structure, avoids structural damage to the mesh surface caused by the static load of the counterweight, and ensures the structural integrity of the mesh surface for continuous operation. The outer surface of the counterweight block (7) is provided with an anti-corrosion coating.

[0032] One embodiment of the present invention employs a multi-process design for its mesh surface, making it suitable for interception operations of various small unmanned aerial vehicles (UAVs). It can utilize plain weave, twill weave, twisted weave, knotted weave, warp-knitted knotless weave, and bidirectional integrated stretching forming processes, combined with single dead knots, double dead knots, and lock knots for reinforcement. Diamond, square, and hexagonal mesh structures can be configured. The square, uniform, and regular mesh structure used in the attached drawings of one embodiment of the present invention is a key structural form protected according to this embodiment. Different weaving structures are suitable for small UAVs with different parameters, covering various interception conditions including conventional, high-speed, and high-impact operations.

[0033] Referring to Figures 1, 5, and 6, the counterweight (7) is connected to the inner wall of the corresponding side column (1) on both the left and right sides by horizontally arranged springs (3). The lower side of the counterweight (7) is connected to the ground embedded parts by vertically arranged springs (3). The springs (3) are cylindrical helical tension springs, and both ends are connected to buckles (8). During assembly, the springs (3) are fastened to the corresponding positions of the counterweight (7), the column (1), and the ground by the buckles (8), so as to achieve detachable connection. When the cylindrical helical tension spring undergoes reciprocating tension and contraction deformation, the adjacent spring wires and spring coils come into contact with each other through physical friction, generating a mechanical damping effect, thereby consuming vibration energy.

[0034] The working process of this device is as follows:

[0035] Initial state: After assembly, the mesh (4) is in a vertical tension state under the gravity traction of the counterweight (7). At the same time, the horizontally and vertically arranged springs (3) are in a pre-tension state that provides initial tension force, eliminating the empty stroke of the force. At this time, the system is in a static state of equilibrium before interception.

[0036] Interception process: When the small drone impacts the mesh surface (4), the mesh surface (4) undergoes a concave deformation, which drives the counterweight (7) below to displace. The impact kinetic energy is converted into the gravitational potential energy of the counterweight (7) being lifted and the elastic potential energy of each spring (3) being stretched, absorbing the impact energy. During the stretching process of the springs (3), adjacent spring coils rub against each other, generating a mechanical damping effect. Through physical friction, some of the kinetic energy is converted into heat energy and consumed, slowing down the displacement speed of the system.

[0037] Damping Reset Process: After the small UAV impact ends and the external load disappears, the raised counterweight (7) falls downward under the action of gravity, while the stretched spring (3) generates elastic contraction force. Driven by the combined force of gravity and elastic contraction force, the counterweight (7) moves downward and pulls the mesh surface (4) back to its initial state. When the spring (3) contracts and resets, physical friction occurs continuously between its adjacent spring coils, generating damping, which continuously consumes the residual vibration energy when the system rebounds, reduces the swaying time of the mesh surface (4), eliminates reciprocating swaying, and makes the structure quickly stop and stabilize in the initial vertical tensioned interception state.

[0038] Compared with existing pure spring-reset interception nets, the suspended counterweight-spring coupled reset structure of one embodiment of the present invention has the following unexpected technical effects: First, the counterweight (7) provides constant gravity traction, and the net surface (4) always remains vertically tensioned, eliminating the need to cover all four sides of the net surface with springs, making the structure simpler and the installation cost lower; Second, the reset is mainly based on gravity return and supplemented by spring (3) buffering. Even if the preload of the spring (3) decreases or fatigues after long-term use, it can still rely on the gravity of the counterweight (7) for reliable reset, and the reset reliability does not depend on the state of the spring; Third, the horizontal and vertical multi-directional springs (3) and the counterweight (7) constitute a bidirectional constraint coupled damping system. After impact, the system's swaying decay time is significantly shorter than that of a pure four-sided spring net, allowing it to recover to the interception state more quickly and achieve continuous interception.

[0039] The above description, in conjunction with specific embodiments, illustrates the present invention and should not be construed as limiting the specific embodiments to these embodiments. Those skilled in the art will recognize that equivalent substitutions or modifications can be made without departing from the concept of the present invention, and all such modifications should be considered within the scope of protection of the present invention.

Claims

1. A suspended counterweight damping interception net for resisting attacks by small unmanned aerial vehicles, characterized in that, include: The structure comprises: a column (1), corner pieces (2), a spring (3), a mesh surface (4), a base (5), bolts (6), a counterweight (7), a latch (8), a crossbeam (9), a pin (10), and hooks (11). Two columns (1) are symmetrically distributed on the left and right sides of the mesh surface (4). The bottom of each column (1) is connected to a base (5), which is fixed to the foundation by bolts (6). Two corner pieces (2) are fixed to the tops of the two columns (1), with symmetrical structures on the left and right sides. The two ends of the crossbeam (9) are inserted into the two corner pieces (2) and fixed by pins (10), horizontally mounted above the two columns (1). The upper edge of the mesh surface (4) is suspended below the crossbeam (9) by multiple hooks (11). The lower edge of the mesh surface (4) is connected to the counterweight (7) by multiple hooks (11). The counterweight (7) is a solid mass block that provides downward gravity traction. The left and right sides of the counterweight (7) are connected to the corresponding side columns (1) by horizontally arranged springs (3). The lower side of the counterweight (7) is connected to the ground by vertically arranged springs (3). Both ends of the springs (3) are connected to the latches (8). When the mesh surface (4) is deformed by the impact of a small drone, it drives the counterweight (7) to move. During the reciprocating deformation process of the counterweight (7) as it stretches and contracts, the springs (3) generate mechanical damping by the physical friction between their adjacent spring coils, which consumes the vibration energy of the system, reduces the swaying time of the mesh surface (4), and suppresses the reciprocating swaying of the system. After the impact load disappears, the counterweight (7) falls back under the action of gravity, and the elastic contraction force of the springs (3) is superimposed to drive the mesh surface (4) to return to the vertical tension state.

2. The suspended counterweight damping interception net for resisting small drone attacks according to claim 1, characterized in that, The corner piece (2) is a right-angle sleeve, with one end sleeved to the top of the column (1) and the other end sleeved to the end of the crossbeam (9).

3. The suspended counterweight damping interception net for resisting small unmanned aerial vehicle (UAV) attacks according to claim 1, characterized in that, The latches (8) at both ends of the spring (3) are detachably connected to the counterweight (7), the column (1) and the ground embedded parts, respectively.

4. The suspended counterweight damping interception net for resisting small drone attacks according to claim 1, characterized in that, The spring (3) is a cylindrical helical tension spring; the mechanical damping is generated by the displacement of the counterweight (7) driving the spring (3) to reciprocate under the constraint of the suspended counterweight-spring coupling. The physical friction between the adjacent spring wires and spring coils of the spring (3) converts the kinetic energy of the system into heat energy dissipation, reducing the swaying time of the mesh surface (4).

5. The suspended counterweight damping interception net for resisting small unmanned aerial vehicle (UAV) attacks according to claim 1, characterized in that, The mesh (4) is woven from high-strength fiber rope, and the mesh openings are diamond-shaped or square.

6. The suspended counterweight damping interception net for resisting small unmanned aerial vehicle (UAV) attacks according to claim 1, characterized in that, The initial equilibrium state is as follows: the mesh surface (4) is in a vertical tension state under the gravity traction of the counterweight (7), and all the springs (3) are in a pre-tension state that provides initial tensile force to eliminate the empty stroke of the force.

7. The suspended counterweight damping interception net for resisting small unmanned aerial vehicle (UAV) attacks according to claim 1, characterized in that, The counterweight (7) is selected from one or more of cast iron, cast steel, reinforced concrete, and high-density composite counterweight materials; the high-density composite counterweight material adopts a closed metal shell, and the shell is filled with one or more high-density fillers selected from barite, iron ore sand, and gravel.

8. The suspended counterweight damping interception net for resisting small unmanned aerial vehicle (UAV) attacks according to claim 1 or 7, characterized in that, The mesh (4) is woven with high-strength polyethylene fiber or aramid fiber, and the weaving method is plain weave or twill weave; the outer surface of the counterweight (7) is provided with an anti-corrosion coating.

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