Unmanned aerial vehicle with floating type catching net

Abstract

The invention discloses an unmanned aerial vehicle with a floating type catching net. The unmanned aerial vehicle with the floating type catching net comprises a catching net assembly and a propeller propelling unit, the catching net assembly comprises a flexible catching net and a plurality of long-strip-shaped air bags, the flexible catching net is formed by interweaving and connecting a plurality of net lines to form a net-shaped intercepting body with a preset area, and the multiple air bags are arranged along the path of at least part of the net lines of the flexible catching net; the air bag is arranged on the flexible catching net and fixedly connected with or integrally formed with the net line, the propeller propelling units are installed on at least four corners of the flexible catching net, the air bag is in an inflated state, the flexible catching net is kept unfolded, and buoyancy provided by the air bag is balanced or partially counteracted with the total gravity of the unmanned aerial vehicle with the floating type catching net. According to the unmanned aerial vehicle with the floating type catching net, dead weight and resistance are counteracted through buoyancy of the air bag, and overlong-endurance patrol and high-maneuverability interception are achieved while the overlarge interception area is kept.

Description

Technical Field

[0001] This invention relates to the field of drone countermeasures technology, and more particularly to a drone with a floating net. Background Technology

[0002] In the field of drone countermeasures, using drones equipped with nets for close-range interception is an important method with low collateral damage. Related technologies typically involve attaching one or more nets directly or via simple brackets to the underside or rear of a multi-rotor drone. When a target drone is detected, the carrier aircraft maneuvers to its vicinity, using physical collision to entangle the nets around the target's rotor blades, thus achieving capture.

[0003] However, this net-attached interception method has a serious inherent flaw: the enormous air resistance generated by the net drastically reduces the aircraft's endurance. The deployed net area is typically several square meters or even larger, generating significant aerodynamic drag during flight, forcing the UAV's power system to continuously output higher power to maintain flight and maneuverability. Practice shows that after attaching the net, the UAV's effective endurance is often reduced to half or even less of its original time. This directly leads to two serious tactical problems: first, the UAV cannot conduct long-term patrols in the mission airspace, and can only take off urgently after receiving an alert, resulting in slow reaction speed and a time window blind spot; second, even if it successfully reaches the interception airspace, its short loiter time severely limits tactical maneuverability and opportunities for multiple interception attempts. If the first interception fails or the target maneuvers to evade, the aircraft may be forced to return due to insufficient battery power, leading to mission failure. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] To address this, embodiments of the present invention propose a floating net-catching drone that uses airbag buoyancy to counteract its own weight and drag, achieving ultra-long endurance patrol and highly maneuverable interception while maintaining a large interception area.

[0006] The drone for the floating net in this embodiment of the invention includes: A netting assembly includes a flexible net and multiple elongated airbags. The flexible net is formed by multiple interwoven net lines to create a mesh-like interception body with a predetermined area. The multiple airbags are arranged along at least a portion of the net lines and are fixedly connected to or integrally formed with the net lines. The airbags are configured to generate lift, providing net buoyancy to the entire netting assembly, after being filled with low-density gas. The buoyancy of the gas in the airbags at least partially offsets the weight of the netting assembly. The inflated airbags provide structural support for the net lines connected to them, enabling the flexible net to maintain its deployed planar or curved interception posture for an extended period without continuous external power input. Multiple propeller propulsion units are installed at at least four corners of the flexible net. The airbags are inflated to keep the flexible net deployed, and the buoyancy provided by the airbags balances or partially cancels out the total weight of the drone with the floating net.

[0007] In some embodiments, at least four corner areas of the flexible net are provided with mounting blocks, the density of which is greater than the average density of the net wire and the airbag. The mounting blocks are used to adjust the center of gravity distribution of the net assembly and provide counterweight. The mounting blocks are pre-set with mechanical and electrical interfaces for connecting external power devices or loads.

[0008] In some embodiments, the propeller propulsion unit is mounted to at least four corners of the flexible net via a mechanical interface on the mounting block.

[0009] In some embodiments, the system further includes a flight control module, a power module, and a communication module. The power module supplies power to the propeller propulsion unit, the flight control module, and the communication module through an electrical interface on the mounting block. The flight control module drives and controls the UAV in its deployed and floating state to perform aerial maneuvers by controlling the thrust and torque of the plurality of propeller propulsion units.

[0010] In some embodiments, the flexible netting is formed by spirally winding multiple strands of fiber or polymer filaments to form a composite line.

[0011] In some embodiments, at least a portion of the network cable has a cavity along its axial direction inside or outside, and the airbag is built into the cavity.

[0012] In some embodiments, the airbag is integrated with the network cable by means of weaving, bonding, or covering.

[0013] In some embodiments, the airbag is made of a flexible, airtight material, and the interior of the airbag is pre-filled with a solid or powdered chemical gas-generating agent, and / or connected to an external high-pressure gas source via a micro-valve. The airbag is configured to achieve rapid automatic inflation upon receiving a trigger signal, through the reaction of the chemical gas-generating agent or the release of the high-pressure gas source.

[0014] In some embodiments, a photoelectric detector is also included, which is mounted on at least one of the mounting blocks and electrically connected to the flight control module. The photoelectric detector is used to detect the target UAV and provide it with tracking information.

[0015] In some embodiments, a center of gravity adjustment device is also included, which includes a liquid bladder and a liquid pump disposed inside the flexible net or on the mounting block. The liquid bladders are connected to each other via water pipes. The flight control module controls the liquid pump to drive the liquid to transfer between the liquid bladders in order to dynamically adjust the pitch or roll attitude of the UAV.

[0016] The floating net drone of this invention creatively introduces the principle of aerostatics by integrating inflatable airbags into the net. After inflation, the airbags not only provide net buoyancy for the entire system, significantly offsetting the platform's weight, but also act as a distributed rigid frame, allowing the net to maintain a fully deployed interception posture for extended periods. This fundamental design brings three disruptive technological effects: First, it eliminates the need for the drone's propellers to provide all lift, allowing most of the power to be used for maneuvering. This enables an significantly longer endurance compared to traditional net-laying drones, supporting uninterrupted area monitoring while carrying a net with an ultra-large interception area (tens of square meters). Second, the inflated net possesses a stable preset shape and rigidity, ensuring a reliable and actively adjustable interception area, overcoming the shortcomings of traditional net-casting methods that are prone to retraction and have unpredictable shapes. Finally, combined with the power modules and flight control system installed at the four corners of the net, the platform can perform rapid and proactive pursuit and net-laying maneuvers in a low-energy floating state, upgrading the interception mode from passive collision capture to proactive area blockade and precise interception. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the netting assembly according to an embodiment of the present invention.

[0018] Figure 2 This is a frontal schematic diagram of a drone carrying a floating net according to an embodiment of the present invention.

[0019] Figure 3 This is a reverse view of the drone carrying the floating net according to an embodiment of the present invention.

[0020] Figure label: 10. Unauthorized drone flights; 1-Catching net assembly; 11-Catching net; 12-Airbag; 13-Mounting block; 2-Floating net drone; 21-Propeller propulsion unit; 22-Photoelectric detector head; 23-Liquid bladder; 24-Liquid pump; 25-Water pipe. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0022] The following describes an embodiment of the floating net drone of the present invention with reference to the accompanying drawings.

[0023] like Figures 1 to 3 As shown, the floating net drone 2 of this embodiment includes a net assembly 1, multiple propeller propulsion units 21, a flight control module, a power module, and a communication module (modules are not shown in the figure).

[0024] The net assembly 1 includes a flexible net 11 and multiple elongated airbags 12. The flexible net 11 is formed by multiple interwoven net lines to create a mesh-like interception body with a predetermined area. The multiple airbags 12 are arranged along at least a portion of the net lines of the flexible net 11 and are fixedly connected to the net lines or integrally formed with them. The airbags 12 are physically deeply integrated with the net 11. The airbags 12 are no longer independent components but have become part of the structure of the net 11. Their inflated shape directly determines the shape of the net 11.

[0025] The airbag 12 is configured to generate lift that gives the entire netting assembly 1 a net buoyancy after being filled with low-density gas, and the buoyancy of the gas in the airbag 12 at least partially offsets the weight of the netting assembly 1. The inflated airbag 12 is used to provide structural support for the netting connected to it, so that the flexible netting 11 can maintain its deployed planar or curved interception posture for a long time without external continuous power input.

[0026] In related technologies, the deployment of a net relies entirely on initial kinetic energy (such as projectile force or centrifugal force). Once the kinetic energy is depleted, the flexible net inevitably collapses under its own weight and air resistance. In the embodiments of this invention, the inflated airbag 12 itself has shape retention capabilities (similar to an inflatable rod or trachea). The airbag 12 acts as a built-in, distributed rigid skeleton, internally supporting the net lines connected to it. This support is continuous; as long as the internal pressure of the airbag 12 is maintained, the supporting force exists, thereby solving the structural defect in related technologies where deployment cannot be maintained after instantaneous deployment.

[0027] The introduction of aerostatics principles is evident in the lift generated by filling with low-density gas, which provides net buoyancy to the entire netting assembly 1 and at least partially offsets gravity. By filling with low-density gases such as helium and hydrogen, the airbag 12 provides continuous lift to the entire assembly.

[0028] The main reason why traditional nets fall and retract is gravity. In the embodiments of this invention, buoyancy directly counteracts or significantly reduces the downward pull of gravity on the net, allowing the net lines to be more easily inflated by the airbag 12, with extremely low energy consumption required to maintain the deployed posture. The entire net assembly 1 can suspend or slowly drift down, providing a physical basis for maintaining the interception posture for a long time, making it no longer a fleeting bullet, but a barrier that can exist continuously in the air.

[0029] In this embodiment of the invention, the net assembly 1, due to the continuous structural support of the airbag 12 and the counteracting effect of gravity from buoyancy, allows the net 11 to remain fully or nearly fully deployed for seconds, minutes, or even longer. The interception window is extended from an instant to a period of time, greatly reducing the stringent requirements for the precision of launch / release timing and significantly improving the fault tolerance rate.

[0030] The area of ​​the net deployed by the airbag 12 is stable and predictable. As long as the airbag 12 is fully inflated, the interception area can be maintained near the design maximum value and will not shrink drastically during use, thus making the calculation of the interception probability and tactical deployment reliable.

[0031] The netting component 1 can be deployed as an independent floating interception unit in key airspaces, capable of hovering in the area for extended periods to form a continuous and visible physical barrier, achieving sustained deterrence and coverage of specific airspaces. Tactics have expanded from proactive pursuit and interception to regional ambush and blockade, resulting in a qualitative leap in flexibility.

[0032] The core of deployment and attitude maintenance shifts to the relatively gentle and controllable process of gas inflation. This reduces the precision and strength requirements of the mechanical catapult mechanism, potentially making the system simpler and more reliable. The inflation process is also easier to control (e.g., controlling inflation speed and pressure) to achieve different deployment strategies.

[0033] Optionally, such as Figure 1 As shown, at least four corner areas of the flexible net 11 are provided with mounting blocks 13. The density of the mounting blocks 13 is greater than the average density of the net wire and the airbag 12. The mounting blocks 13 are used to adjust the center of gravity distribution of the net assembly 1 and provide counterweight. The mounting blocks 13 are pre-set with mechanical and electrical interfaces for connecting external power devices or loads.

[0034] Understandably, in terms of materials and function, mounting block 13 is a high-density functional module. The fact that the density of mounting block 13 is greater than the average density of the network cable and airbag 12 clarifies that mounting block 13 is not only a structural component but also a functional counterweight. The material of mounting block 13 can be metal (such as aluminum alloy or counterweight tungsten alloy), high-density composite materials, or a plastic shell internally encapsulating the weight.

[0035] From an interface definition perspective, Mounting Block 13 is a standardized connection hub. The pre-installed mechanical and electrical interfaces on Mounting Block 13 indicate that it is the core of the modular design. Mechanical interfaces may include: quick-release interfaces, such as snap-fit, locking pins, and magnetic interfaces, for quick installation / removal of propellers and mission payloads; and hard points / mounts, standard threaded holes, and mounting rails for securing various equipment. Electrical interfaces are waterproof and shockproof multi-core connectors used to transmit power (to power propellers and sensors) and data (for communication with flight control).

[0036] Internally, mounting block 13 is a hull that may contain embedded basic circuitry. In addition to ballast, its internal space can accommodate a local power management module, a small processor for sensors, a miniature wireless receiver module for communicating with the main flight controller, and a small liquid pump 24 or motor for center of gravity adjustment (as associated with subsequent claims).

[0037] The mounting blocks 13 at the four corners of the net 11 constitute the main mass distribution points of the entire net assembly 1. By adjusting the relative weight of the four mounting blocks 13 during the design phase, or by incorporating movable counterweights within them, the center of gravity and moment of inertia of the assembly can be precisely set. This is crucial for the subsequent addition of propellers to achieve active flight; a stable and controllable center of gravity is the foundation for stable attitude control (pitch, roll, yaw) of the aircraft. The mounting blocks 13 ensure that the center of gravity of the assembly is in a controllable and reasonable position after inflation and deployment, rather than drifting arbitrarily with the lightweight net and airbag 12.

[0038] The standardized interface transforms mounting block 13 into an over-the-air USB interface, allowing for plug-and-play compatibility with any device (power, sensing, or computing modules) that conforms to the interface standard. Installing propeller motors on four mounting blocks 13 instantly upgrades the component to a drone, with the mounting blocks 13 providing a robust structural foundation to counteract the propeller's anti-torque and thrust. Installing an electro-optical pod on one mounting block 13 endows the component with autonomous target detection and tracking capabilities. Adding communication relay modules, lighting modules, and audible / visual warning modules expands its capabilities to include other mission functions.

[0039] Even without the addition of active equipment, the weight of the mounting block 13 itself plays a crucial role. Its downward gravity balances the upward buoyancy of the airbag 12 at the corners, helping to tighten and flatten the soft mesh, preventing it from twisting excessively in the wind, and assisting in maintaining a planar or curved interception posture.

[0040] In an embodiment of the present invention, an installation block 13 is provided on the net 11, which realizes the qualitative change of the net assembly 1 from a floating object to a controllable flight platform, and provides the physical and electrical basis for upgrading to an autonomous mobile interception robot.

[0041] By adjusting the center of gravity, the flight stability of the basic platform is improved. Standardized interfaces enable modularity and reconfigurability of functions. The same basic net-catching component 1 can be quickly configured into dedicated platforms with different performance characteristics (endurance, speed) or different functions (pure interception, reconnaissance + interception) according to mission requirements, reducing research and development and maintenance costs.

[0042] like Figure 2As shown, the propeller propulsion unit 21 is mounted on at least four corners of the net-catching assembly 1 via a mechanical interface on the mounting block 13. The power module supplies power to the propeller propulsion unit 21, the flight control module, and the communication module via an electrical interface on the mounting block 13 of the net-catching assembly 1.

[0043] Traditional drones use a rigid central fuselage as their core, with all equipment centrally located.

[0044] The drone in this embodiment of the invention uses an inflatable, deployable flexible net 11 as its main structure and functional surface, which can also be understood as a drone 2 with a floating net. The aircraft's body is its weapon, achieving a high degree of integration between structure and function, and is a decentralized, distributed configuration.

[0045] Mounting blocks 13 serve as distributed core nodes. The four (or more) corner mounting blocks 13 are the core force-bearing nodes, energy distribution nodes, and control execution nodes of the entire UAV. Mounting blocks 13 anchor the originally loose, flexible network into a quasi-rigid platform with a defined geometry and a controllable force-bearing frame.

[0046] The power (propeller propulsion unit 21), sensing, computing, and communication subsystems are all modular plug-ins, externally attached to or embedded in the mounting block 13 via standardized interfaces. This design makes maintenance, upgrades, and task reconfiguration (such as replacing motors with different power or photoelectric heads with different focal lengths) exceptionally simple.

[0047] The airbag 12 is inflated, keeping the flexible net 11 deployed, and the buoyancy provided by the airbag 12 balances or partially cancels out the total weight of the UAV. The flight control module drives and controls the UAV in its deployed and floating state to perform aerial maneuvers by controlling the thrust and torque of multiple propeller propulsion units 21.

[0048] Through precise calculation and inflation control, the net buoyancy generated by the airbag 12 (buoyancy minus the weight of the airbag 12 and the net body) is equal to or slightly greater than the weight of all other components of the drone (mounting block 13, battery, motor, etc.).

[0049] The propeller propulsion unit 21 does not need to provide or only needs to provide a small amount of lift to overcome gravity. Most of its power can be used for attitude adjustment, horizontal maneuvering and wind resistance, thus solving the defects of traditional net-hanging UAVs that fly with heavy loads and consume a lot of energy.

[0050] The flight control module drives the aircraft by controlling the thrust and torque of multiple propeller propulsion units 21. Its control algorithm is inspired by quadcopter drones, and the positions of the four mounting blocks 13 form a virtual rigid quadrilateral. The flight control module treats these four points as control points and generates roll, pitch, and yaw moments by adjusting the speed difference of the four propellers, thereby controlling the attitude and position of the entire platform.

[0051] Because the main body is a flexible net, it will generate complex deformations and swaying during maneuvers. The flight control module algorithm needs to have the ability to suppress vibrations and coordinate the control of the flexible body. It may model the net as multiple mass-spring-damped systems or use adaptive control to counteract the dynamic effects of the net.

[0052] The process principle in a floating state: Patrol and duty: The drone hovers at the preset patrol point with extremely low power consumption, and the optoelectronic equipment performs a panoramic scan.

[0053] Target interception: After a target is detected, the flight control system calculates the interception route. The propellers provide thrust, driving the entire net surface to maneuver forward or above the target's path, actively placing the interception surface in the target's forward path.

[0054] Collision capture: The target crashes into the net. At this moment, the propeller can immediately adjust its thrust to counteract the impact and attitude disturbance caused by the collision, stabilize the platform, and may tow the entangled target back to base or drop it to a safe area.

[0055] The floating net-catching drone 2 of this invention utilizes buoyancy to extend its endurance by an order of magnitude compared to traditional multi-rotor drones of the same size and payload (from tens of minutes to potentially several hours or even longer, especially when combined with solar power). This allows it to hover and patrol key airspace 24 / 7, like an aerosol balloon, breaking the traditional trade-off between area and maneuverability in net-catching drones. Because the net 11 is not a load but the drone itself, and buoyancy supports the weight, it can maintain an interception area of ​​tens of square meters while still making rapid horizontal movements and attitude adjustments, actively engaging targets rather than passively waiting.

[0056] The floating net-carrying drone 2 serves as a reusable platform with extremely low cost per mission. A single takeoff can execute multiple interceptions (theoretically, as long as the net remains undamaged). Multiple such drones can form an aerial network to create a three-dimensional interception barrier or coordinate a coordinated encirclement. When forming a network, they can partially overlap to create an impenetrable defensive wall, or perform tactical maneuvers, driving and capturing targets like a net for fishing.

[0057] The massive mesh structure provides space and power for mounting more sensors (acoustic, radio frequency detection), allowing it to evolve from a pure interception platform into a multi-functional aerial outpost integrating reconnaissance, surveillance, early warning, and interception.

[0058] In some embodiments, the flexible net 11 has a composite wire formed by spirally winding multiple strands of fiber or polymer filaments, optimizing the basic mechanical properties of the wire. The spiral winding structure (similar to the manufacturing process of steel cables or Kevlar ropes) greatly improves the tensile strength, fatigue resistance, and overall toughness of a single wire. This allows the wire to withstand greater impact forces when intercepting high-speed targets without easily breaking; and during long-term floating, it can resist repeated bending caused by wind loads.

[0059] Furthermore, at least some of the network cables have cavities along their axial direction inside or outside, and the hollow or combinable structure provides space for the integration of the airbag 12 or provides an attachment base.

[0060] The airbag 12 can be built into the cavity, which is equivalent to embedding the airbag 12 as a core material directly into the sheath of the high-strength network cable, achieving maximum physical integration. The airbag 12 is protected by the external structure of the network cable and is not easily scratched or punctured. After inflation, the airbag 12 expands evenly from the inside out, forcing the network cable sheath to expand radially and contract axially, thereby directly and efficiently converting the internal pressure of the airbag 12 into the tension force of the network cable, making the entire network quickly taut.

[0061] The airbag 12 can also be integrated with the netting through weaving, bonding, or covering, so that the inflation and deflation state of the airbag 12 directly relates to the stiffness and shape of the netting. For example, the airbag 12 can be a long, thin tube, directly woven in as a weft or warp thread during net weaving; or it can be adhered to the surface of the netting with a high-strength adhesive; or the airbag 12 and the netting can be covered together in a sheath with a flexible, wear-resistant material. This method is relatively simple and highly flexible. The airbag 12 and the netting are mechanically coupled; when inflated, the airbag 12 expands, transmitting force to the netting through the bonding surface, thus achieving the purpose of controlling the shape of the netting.

[0062] When deflated, the airbag 12 is flexible, and the entire assembly (net cable + deflated airbag 12) can be folded extremely smoothly, allowing for storage in a very small volume (crucial for net-catching projectiles and detachable drones).

[0063] Once inflated, the airbag 12 expands, immediately and forcibly changing the spatial shape of the mesh connected to it. The mesh is straightened and taut, transforming from a soft curve into a rigid line segment. The stiffness (resistance to deformation) and preset shape (designed unfolded shape) of the entire mesh are directly determined and controlled by the inflation pressure and distribution of the airbag 12, realizing a one-click, reversible switch from a flexible, retractable state to a rigid, operational state.

[0064] In embodiments of the present invention, the airbag 12 not only provides external support to the net, but also endows the net itself with variable stiffness. Inflating it hardens it, and unfolding it locks it in place, ensuring high reliability and consistency during the unfolding process and avoiding the irregular unfolding problems caused by different folding methods and release postures in traditional net throwing. In contrast, the nets in related technologies are passively unfolded, relying on inertia to spread out, resulting in random shapes. The net 11 in this embodiment of the present invention, however, is actively shaped, with the airbag 12 precisely shaping the net from within.

[0065] The integrated design of the airbag 12 increases the outer diameter of the net cable by almost nothing, minimizing the theoretically smallest folded volume and greatly improving the carrying capacity of net-catching projectiles or the utilization of internal space in drones. Protected by the net cable material, the airbag 12 has significantly higher damage resistance (scratch and puncture resistance) than exposed, independent airbags, resulting in a higher survivability in interception collisions or complex environments. The integrated structure reduces friction, entanglement, and relative movement between individual components, reducing wear during long-term use and extending service life.

[0066] When a target impacts the mesh surface, the impact force is transmitted through the mesh lines. Because the airbag 12 is integrated with the mesh lines, the impact force is quickly dispersed across the entire support network of the airbag 12, preventing localized mesh line breakage or airbag 12 detachment caused by stress concentration. The entire component is subjected to force as a whole, resulting in stronger impact resistance.

[0067] After inflation, the integrated structure forms a pre-tensioned, shaped membrane structure (similar to the walls of an inflatable castle). This structure itself has good in-plane stiffness, which can better resist wind disturbances and maintain attitude stability, providing a more stable foundation platform for subsequent active flight control (via the propellers mounted on block 13).

[0068] By controlling the inflation and deflation of the airbags 12 in separate zones, the shape of the net can be dynamically and actively adjusted. For example, one side of the airbags 12 can be inflated more fully to bend the net and better "catch" targets from a specific angle; or the airbags can be partially deflated during retrieval to loosen the net for easier storage. This gives the net 11 unprecedented self-adaptive capabilities.

[0069] In some embodiments, the airbag 12 is made of a flexible, airtight material, and the interior of the airbag 12 is pre-filled with a solid or powdered chemical gas-generating agent, and / or connected to an external high-pressure gas source through a micro-valve. The airbag 12 is configured to achieve rapid automatic inflation upon receiving a trigger signal, through the reaction of the chemical gas-generating agent or the release of the high-pressure gas source.

[0070] The airbag 12 may contain a pre-filled solid or powdered chemical gas-generating agent (such as sodium azide NaN3, commonly used in automotive airbags 12, or guanidine nitrate, etc.). These gas-generating agents are usually mixed with oxidizers, combustion improvers, etc., and may be shaped into tablets or compressed into pellets.

[0071] When an electrical trigger signal (such as a small current pulse igniting the detonator / igniter) or a mechanical trigger signal (such as an impact fuse) is received, the chemical gas-generating agent is instantly ignited, resulting in a violent and rapid exothermic decomposition reaction. The reaction produces a large amount of high-temperature inert gas (mainly nitrogen) within milliseconds. These gases rapidly accumulate within the sealed gasbag 12, generating high pressure and causing the gasbag 12 to expand.

[0072] This is a highly integrated, self-contained power supply method. The energy (chemical energy) is stored inside the airbag 12 without the need for external connection, making it particularly suitable for single-use applications or scenarios requiring extremely high deployment speeds, such as net-capture munitions.

[0073] The airbag 12 can also be connected to an external high-pressure gas source (such as a small high-pressure carbon dioxide cylinder, nitrogen cylinder, or a gas storage tank pre-filled by a compressor) via a miniature solenoid valve or burst valve (collectively referred to as a miniature valve).

[0074] When an electrical trigger signal is received, the valve (usually a solenoid valve) opens instantly, or the diaphragm of the burst valve is punctured. Gas stored in the high-pressure gas source (pressure usually above 10-30 MPa) rushes into the airbag 12 through the valve and pipeline in a very short time (within hundreds of milliseconds), causing it to expand.

[0075] This method produces pure gas at a low temperature with controllable pressure. By selecting gas sources with different volumes and pressures, the final volume and internal pressure of the airbag 12 can be precisely controlled. It is more suitable for scenarios that require reusable inflation and deflation or more precise control over the inflation process, such as reusable drones.

[0076] Therefore, the inflation method of the airbag 12 can be designed as a pure chemical type for low-cost, disposable net-catching projectiles; it can also be designed as a pure high-pressure gas source type for reusable UAV platforms; or a combination type, such as first using a miniature chemical gas generator to generate initial gas to quickly deploy the airbag 12, and then using a small high-pressure gas cylinder for subsequent gas replenishment or pressure fine-tuning to achieve a better deployment sequence and pressure control.

[0077] Whether it's the millisecond-level gas generation from a chemical reaction or the instantaneous release of high-pressure gas, it ensures that the airbag 12 fully inflates within one second of receiving the command. This is crucial for intercepting high-speed, close-range targets, ensuring that the net assembly 1 can instantly switch from a folded state to a fully deployed working state, seizing the fleeting interception window and solving the problem of missing targets due to slow deployment in related technologies.

[0078] Chemical gas generators and high-pressure gases are both forms of energy storage with extremely high energy density. A small piece of gas generator or a small gas cylinder can produce enough gas volume to inflate the large gasbag 12. This allows the entire inflation system (energy + actuator) to be made very compact and lightweight, adding almost no extra burden to the netting assembly 1, perfectly meeting the stringent weight and space constraints of drones and netting projectiles.

[0079] These two inflation methods are relatively less affected by the external environment (temperature, air pressure, humidity). The chemical reaction is self-sustaining, and the release of high-pressure gas does not depend on air, enabling the netting assembly 1 of this embodiment to operate reliably under various climatic and altitude conditions.

[0080] Electrical triggering is a mature and reliable technology. The entire inflation process does not involve complex moving mechanical parts (such as large pumps), reducing potential points of failure. In particular, the reliability of chemical gas generation has been proven in the field of automotive airbags.

[0081] Different inflation methods directly correspond to different product positioning. Chemically generated inflation methods are suitable for low-cost, disposable, and highly instantaneous net-catching projectiles, ideal for large-scale deployment and consumable use. High-pressure gas-generated inflation methods are suitable for reusable and highly controllable UAVs, ideal for long-term deployment and multiple missions.

[0082] This design distinction enables the netting component 1 of this invention to cover a complete product range, from low-cost consumables to high-end intelligent equipment, maximizing both commercial and military value.

[0083] In some embodiments, such as Figure 2 and Figure 3 As shown, the floating net drone 2 also includes an optoelectronic detector 22 and a center of mass adjustment device.

[0084] The photoelectric detector 22 is mounted on at least one mounting block 13 and is electrically connected to the flight control module. The photoelectric detector 22 is used to detect the target UAV and provide it with tracking information.

[0085] The photoelectric detector 22 is a comprehensive photoelectric payload that integrates sensors such as visible light cameras, infrared thermal imagers or laser rangefinders. Its working principle is based on image recognition and target tracking algorithms.

[0086] The camera continuously captures images of the surrounding airspace, and the image processing chip runs algorithms to identify moving targets with drone characteristics (such as specific shapes, rotor flashing, and heat signatures) from complex backgrounds (clouds, buildings, and birds).

[0087] Once identified, the algorithm locks onto the target, continuously calculates its pixel position in the image, and combines its own attitude and position data (from the flight controller's IMU and GPS) to calculate the target's relative orientation, distance, and motion vector, thus forming tracking information.

[0088] This information is provided to the flight control module (Flight Controller) in real time. Based on this information, the Flight Controller generates interception route instructions, controls the propellers, and drives the entire UAV to maneuver toward the predicted interception point.

[0089] Patrol mode: In patrol mode, the photoelectric head may perform periodic panoramic scans or gaze at specific sectors, and is in a medium power consumption state.

[0090] Tracking and interception mode: Once a threat is detected and confirmed, the system switches to a high-frequency, high-precision continuous tracking mode. All computing resources are focused on the target, providing the flight control system with high-frequency updates (e.g., tens of times per second) of guidance information. This mode operates under high power consumption and high load.

[0091] Installation location considerations: When installed on corner mounting block 13, a two-axis gimbal is usually required to isolate the platform's own sway, ensure the stability of the line of sight, and obtain a clear image.

[0092] The photoelectric sensor 22 gives the UAV eyes and (partially) a brain, enabling it to autonomously detect, identify, lock onto threats, and initiate interception, instead of relying on an external command system to inform it of the target's location. This improves reaction speed (from minutes to seconds) and reduces dependence on complex command and communication links, giving the system extremely strong independent combat capabilities.

[0093] The center of gravity adjustment device includes a liquid bladder 23 and a liquid pump 24 located inside the flexible net 11 or on the mounting block 13. The liquid bladders 23 are connected by a water pipe 25. The flight control module controls the liquid pump 24 to drive the liquid to transfer between the liquid bladders 23, so as to dynamically adjust the pitch or roll attitude of the UAV.

[0094] The center of gravity adjustment device is based on the static attitude control principle of liquid mass transfer. Its core is to adjust the position of the center of gravity by changing the mass distribution inside the system, thereby affecting the attitude.

[0095] The center of mass adjustment device includes at least two (usually four, corresponding to the four corners) liquid bladders 23, a network of water pipes 25 connected to them, and a liquid pump 24 (such as a miniature electromagnetic pump).

[0096] When the flight controller needs to adjust the attitude (for example, to tilt the net forward to accelerate forward), it commands the liquid pump 24 to pump water (or other high-density liquid) from the rear liquid sac 23 into the front liquid sac 23.

[0097] The forward shift of mass causes the center of gravity of the entire system to move forward. With the center of buoyancy (the point of application of the resultant buoyancy force, which is basically fixed by the shape of airbag 12) remaining unchanged, the forward shift of the center of gravity will generate a pitching moment, causing the entire platform to pitch around the center of buoyancy and the net to tilt forward. Similarly, roll control can be achieved by shifting the liquid left and right.

[0098] Precise attitude maintenance: During hovering, it is used to counteract slow attitude drift caused by light winds, or to precisely adjust the orientation of the mesh (e.g., always facing the direction of the threat). In this mode, the pump operates intermittently at low speed, with extremely low power consumption.

[0099] High-maneuverability auxiliary conditions: When making rapid turns or accelerating / decelerating, it works in conjunction with propeller power control. For example, while commanding the propeller to generate pitching torque, it simultaneously transfers fluid to rapidly change the center of gravity, which can significantly enhance the response speed and efficiency of attitude changes, and reduce propeller energy consumption and excessive maneuvering.

[0100] Anti-interference recovery condition: After a collision with the target, the platform will be subjected to severe impact. The center of gravity adjustment device can quickly transfer fluid to generate a strong restoring torque, assisting the propeller to stabilize the platform's attitude in the shortest possible time and prevent uncontrolled rollover.

[0101] The center-of-gravity adjustment device is a highly efficient method for attitude fine-tuning. Compared to propeller control, which requires continuous energy consumption to generate counter-torque and may cause platform oscillations, adjusting the center of gravity by moving the liquid allows for maintaining the attitude once it is in place without continuous energy consumption (the liquid pump stops at 24). It only requires overcoming minimal fluid friction resistance, resulting in smoother and more precise attitude control of large-area flexible platforms. This reduces vibration and noise caused by frequent propeller acceleration and deceleration, which is beneficial for stable imaging of optoelectronic equipment and the platform's concealment.

[0102] Under gusts of wind, the center of gravity adjustment device can quickly compensate, maintaining the stability of the net and preventing it from being blown over. With the assistance of the gimbal, the photoelectric head can maintain stable tracking of the target even during shaking. Furthermore, after collision capture, rapid center of gravity adjustment is a crucial recovery method to prevent the platform from becoming entangled with the captured target and crashing out of control, thus improving the platform's reusability and mission reliability.

[0103] By assigning the high-energy-consuming displacement propulsion task primarily to the propeller, and delegating the low-energy-consuming tasks of fine attitude adjustment and maintenance to the center of mass adjustment device, the overall energy utilization efficiency is further optimized, indirectly extending the flight time.

[0104] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0105] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0106] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0107] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0108] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0109] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A floating net-catching drone, characterized in that, include: A netting assembly includes a flexible net and multiple elongated airbags. The flexible net is formed by multiple interwoven net lines to create a mesh-like interception body with a predetermined area. The multiple airbags are arranged along at least a portion of the net lines and are fixedly connected to or integrally formed with the net lines. The airbags are configured to generate lift, providing net buoyancy to the entire netting assembly, after being filled with low-density gas. The buoyancy of the gas in the airbags at least partially offsets the weight of the netting assembly. The inflated airbags provide structural support for the net lines connected to them, enabling the flexible net to maintain its deployed planar or curved interception posture for an extended period without continuous external power input. Multiple propeller propulsion units are installed at at least four corners of the flexible net. The airbags are inflated to keep the flexible net deployed, and the buoyancy provided by the airbags balances or partially cancels out the total weight of the drone with the floating net.

2. The UAV with a floating net according to claim 1, characterized in that, The flexible net has mounting blocks at at least at its four corners. The density of the mounting blocks is greater than the average density of the net wires and airbags. The mounting blocks are used to adjust the center of gravity distribution of the net assembly and provide counterweight. The mounting blocks are pre-set with mechanical and electrical interfaces for connecting external power devices or loads.

3. The UAV with a floating net according to claim 2, characterized in that, The propeller propulsion unit is mounted to at least four corners of the flexible net via a mechanical interface on the mounting block.

4. The UAV with a floating net according to claim 2, characterized in that, It also includes a flight control module, a power module, and a communication module. The power module supplies power to the propeller propulsion unit, the flight control module, and the communication module through an electrical interface on the mounting block. The flight control module drives and controls the UAV in its deployed and floating state to perform aerial maneuvers by controlling the thrust and torque of the multiple propeller propulsion units.

5. The UAV with a floating net according to claim 1, characterized in that, The flexible netting is composed of a composite wire formed by spirally winding multiple strands of fiber or polymer material filaments.

6. The UAV with a floating net according to claim 5, characterized in that, At least a portion of the network cable has a cavity along its axial direction inside or outside, and the airbag is built into the cavity.

7. The UAV with a floating net according to claim 5, characterized in that, The airbag is integrated with the network cable through weaving, bonding, and covering.

8. The UAV with a floating net according to claim 5, characterized in that, The airbag is made of a flexible, airtight material. The airbag is pre-filled with a solid or powdered chemical gas-generating agent and / or connected to an external high-pressure gas source through a micro-valve. The airbag is configured to rapidly and automatically inflate upon receiving a trigger signal, either through the reaction of the chemical gas-generating agent or the release of the high-pressure gas source.

9. The UAV with a floating net according to claim 4, characterized in that, It also includes an optoelectronic detector, which is mounted on at least one of the mounting blocks and electrically connected to the flight control module. The optoelectronic detector is used to detect the target UAV and provide it with tracking information.

10. The UAV with a floating net according to claim 4, characterized in that, It also includes a center of gravity adjustment device, which includes a liquid bladder and a liquid pump located inside the flexible net or on the mounting block. The liquid bladders are connected to each other via water pipes. The flight control module controls the liquid pump to drive the liquid to transfer between the liquid bladders in order to dynamically adjust the pitch or roll attitude of the UAV.

Images