Low-altitude target netting system and method based on electromagnetic ejection technology

Abstract

The invention provides a low-altitude target netting system and method based on an electromagnetic ejection technology, and belongs to the field of aircraft control. The low-altitude target netting system comprises at least one aiming device, at least one electromagnetic launching device, at least one net bomb device and a control device, wherein each aiming device, each electromagnetic launching device and each net bomb device are respectively in communication connection with the control device; the control device is used for generating a control instruction for capturing a low-altitude target; the aiming device is used for identifying and tracking a low-altitude target to obtain position information of the low-altitude target, performing trajectory calculation in real time according to the position information, adjusting the posture of the electromagnetic launching device, and controlling launching of the electromagnetic launching device based on a control instruction; the electromagnetic launching device is used for launching the net bomb device through electromagnetic ejection; the net bomb device is used for capturing a low-altitude target. The capturing net is launched through the electromagnetic launching technology, the capturing range of the system can be effectively expanded, launching parameters can be adjusted in real time, and therefore the launching speed and the capturing rate can be effectively increased.

Description

Technical Field

[0001] The present invention belongs to the field of aircraft control, and particularly relates to a low-altitude target net capture system and method based on electromagnetic catapult technology. Background Art

[0002] With the wide application of unmanned aerial vehicles (UAVs), the threat of illegal UAVs around civil airports has become increasingly prominent, affecting flight safety. As a national key infrastructure, the construction of the UAV countermeasure system at the airport must fully consider the particularity of airport operations. It should be based on ensuring the normal operation of the airport, and on this basis, an efficient protection system should be constructed. At the operational level, the airport airspace is the most strictly monitored. Especially in key airspaces such as the approach and departure route areas and both ends of the runway, absolute safety must be ensured. The electromagnetic environment at the airport is extremely sensitive, and any countermeasure means must not interfere with the airport's communication and navigation equipment. At the safety level, the protection of the aircraft during the takeoff and landing phases at the airport is particularly important. The countermeasure measures must ensure that no secondary risks that may affect the safety of the aircraft are generated, such as avoiding the generation of flying debris or electromagnetic interference.

[0003] Currently, the UAV countermeasure technologies on the market are divided into four categories, namely radio interference and deception technology, physical interception technology, laser and microwave weapons, and traditional fire strikes, etc. Radio interference uses electromagnetic waves to interfere with the communication and navigation signals of UAVs, forcing the UAVs to return or land. GPS deception is to make the UAVs deviate from the route or land in a designated area by sending forged GPS signals. The most typical physical interception technology is ground-launched net capture and large UAV net interception. The large UAV net capture method is that the operator controls a large UAV equipped with an interception net to fly near the invading UAV and fires a flexible net to wrap the UAV. The ground-launched net capture method usually uses a launch system (such as a launch gun, a launch cannon, etc.) to launch the flexible net loaded in the barrel through compressed air to achieve the purpose of capturing the UAV. Microwave weapons use high-power microwave technology to interfere with and destroy the electronic equipment of UAVs by directionally emitting high-power electromagnetic pulses, making them lose control and finally crash. Different from laser weapons, microwave weapons do not need to lock the target. As long as strong enough electromagnetic wave interference is generated in the area where the target flies, the interception purpose can be achieved. And traditional fire strikes are to bring direct fire strikes to the invading UAVs through firearms and missiles. The advantages and disadvantages of the existing countermeasure technologies when applied at civil airports are shown in Table 1 below.

[0004] Table 1

[0005]

[0006] As can be seen from Table 1, among the four major categories, the large unmanned aerial vehicle net capture and capture net launch systems are more suitable for countering intruding unmanned aerial vehicles at civilian airports. Among them, the large unmanned aerial vehicle net capture technology is only applicable to unmanned aerial vehicle targets at low speed or hovering; the ground-launched net capture technology can counter moving targets, and the cooperation with a mobile launch platform can also enhance the capture flexibility, but there is a problem of short range; therefore, the existing technologies have improved the above net capture methods.

[0007] Such as Chinese Patent CN118980292A - A net capture device for countering unmanned aerial vehicles. The net capture device is installed at the mounting point of the aircraft and includes a multi-axis motion platform, a launcher, a cartridge belt, and a net capture projectile. Through the feeding mechanism and the cartridge belt mechanism, continuous feeding operations can be achieved, and the empty cartridge cases and their cartridge belts can be discarded by relying on the cutting function, without the need for a complex and costly recovery mechanism, and it can also solve the problem of insufficient ammunition for multi-barrel ammunition. Relying on the cartridge belt stored in the aircraft, the loading capacity can be effectively expanded, so as to cope with the countermeasure tasks against multiple unmanned aerial vehicles. This method requires professional pilots to operate and has a high cost. It is very difficult to take off an aircraft similar to this in the civil aviation field. At the same time, the cut empty cartridge cases and cartridge belts are extremely likely to cause harm to ground facilities and personnel, and are only applicable to the military field.

[0008] Such as Chinese Patent CN118049888A - A system and method for countering black-flying unmanned aerial vehicles by using a net to capture unmanned aerial vehicles. The method of using a net to capture unmanned aerial vehicles is adopted to achieve the capture of intruding unmanned aerial vehicles. This method requires professional pilots to be on duty, and the capture net is launched by igniting blank cartridges with ignition wires. In a relatively strict scenario at the airport, the management of blank cartridges is relatively complex. Once the pilot of the intruding unmanned aerial vehicle becomes aware, the flight path can be immediately changed or the aircraft can return, resulting in a significant reduction in the capture rate.

[0009] Another example is the Sky Wall 300 of the British Open Works Engineering company, which is a representative of ground net capture technology. It uses compressed air technology to launch net projectiles, and the integrated optical equipment can effectively track and capture unmanned aerial vehicles. The Sky Wall 300 can be installed on a light vehicle, has strong mobility, can be quickly deployed, and the maximum effective range can reach 300 meters. However, since compressed air is used as the launch power source and the compressed air pressure is constant, it is difficult to adjust the launch parameters in real time, and the gas cylinder needs to be replaced after launch. The gas cylinder pressure is affected in low temperature, high temperature, and plateau areas, and the firing rate and accuracy fluctuate greatly, and it needs to be reloaded after each launch, resulting in a delay in launch, etc.

[0010] Since the existing net capture systems cannot meet the net capture requirements for low-altitude targets in the civil aviation field, therefore, how to improve the capture range and capture rate of the net capture system and increase the launch speed has become a technical problem that needs to be solved urgently. Summary of the Invention

[0011] The object of the present invention is to solve the problems existing in the above-mentioned prior art, and to provide a low-altitude target net capture system and method based on electromagnetic catapult technology. By using electromagnetic catapult technology to launch the capture net, the capture range and capture rate of the net capture system can be effectively improved, and the launch speed can be increased.

[0012] The present invention is achieved by the following technical solutions:

[0013] In a first aspect of the present invention, there is provided a low-altitude target net capture system based on electromagnetic catapult technology. The low-altitude target net capture system includes: at least one aiming device, at least one electromagnetic launching device, at least one net projectile device, and a control device. Each of the aiming device, the electromagnetic launching device, and the net projectile device is communicatively connected to the control device;

[0014] The control device is configured to generate a control command for capturing a low-altitude target;

[0015] The aiming device is configured to identify and track the low-altitude target to obtain the position information of the low-altitude target, perform ballistic calculation in real time according to the position information and adjust the attitude of the electromagnetic launching device, and control the launch of the electromagnetic launching device based on the control command;

[0016] The electromagnetic launching device is configured to launch the net projectile device by electromagnetic catapult;

[0017] The net projectile device is disposed in the electromagnetic launching device, and the net projectile device is configured to capture a low-altitude target.

[0018] A further improvement of the present invention lies in:

[0019] The electromagnetic launching device includes: a control circuit, and an electromagnetic drive module, a barrel and frame assembly, and an ejection loading mechanism that are respectively communicatively connected to the control circuit;

[0020] The control circuit is configured to drive and control the barrel in the barrel and frame assembly to control the attitude of the barrel during launch;

[0021] The control circuit is further configured to control the ejection loading mechanism to load the net projectile device to be launched into the barrel and position it at a preset position before launch;

[0022] The control circuit is further configured to provide a drive signal to the electromagnetic drive module to drive the electromagnetic coil in the electromagnetic drive module to generate a magnetic field to drive the net projectile device.

[0023] A further improvement of the present invention lies in:

[0024] The net projectile device includes a combat unit and a control unit, and the control unit is communicatively connected to the combat unit;

[0025] The combat unit includes a capture net, a net opener, and a projectile body. The net opener is disposed at the front end of the projectile body, and the net opener controls the capture net to open at a preset distance;

[0026] The control unit includes a timer and a positioning beacon. The timer is used to set the time for the capture net to open, and the positioning beacon is used to locate the captured low-altitude target and / or the position where the capture net falls.

[0027] A further improvement of the present invention lies in:

[0028] The net projectile device further includes a safeguard unit;

[0029] The safeguard unit includes a parachute and a parachute opener. The parachute is installed at the tail of the projectile body and is used to slowly descend to the ground after capturing the low-altitude target;

[0030] The parachute opener is used to control the parachute to open after capturing the low-altitude target.

[0031] A further improvement of the present invention lies in:

[0032] The aiming device includes: optoelectronic equipment, a ballistic calculation device, a turntable device, and a meteorological environment sensor. The optoelectronic equipment, the ballistic calculation device, the turntable device, and the meteorological environment sensor are communicatively connected;

[0033] The meteorological environment sensor is used to collect environmental information in real time;

[0034] The optoelectronic equipment is used to identify and track the low-altitude target to obtain the position information of the low-altitude target;

[0035] The turntable device is used to adjust the attitude of the electromagnetic launch device according to the position information;

[0036] The ballistic calculation device is used to perform ballistic calculation in real time according to the position information and the environmental information and control the launch of the electromagnetic launch device.

[0037] A further improvement of the present invention lies in:

[0038] The low-altitude target net capture system is communicatively connected to the detection and identification system;

[0039] The detection and identification system is used to detect the low-altitude target entering the third preset area to obtain the position information and speed information of the low-altitude target, and send the position information and the speed information to the low-altitude target net capture system.

[0040] In a second aspect of the present invention, there is provided a method for netting low-altitude targets based on electromagnetic catapult technology, which is applied to the low-altitude target netting system based on electromagnetic catapult technology described in any one of the first aspects. The method for netting low-altitude targets includes:

[0041] When a low-altitude target enters a first preset area, the aiming device aims at and tracks the low-altitude target;

[0042] When the low-altitude target enters a second preset area, the control device controls the electromagnetic launching device to launch the net projectile device to capture the low-altitude target.

[0043] A further improvement of the present invention lies in:

[0044] After capturing the low-altitude target, the method for netting low-altitude targets further includes:

[0045] Slowly lowering the low-altitude target to the ground through a parachute.

[0046] A further improvement of the present invention lies in:

[0047] After capturing the low-altitude target, the method for netting low-altitude targets further includes:

[0048] The positioning beacon sends the position information of the captured low-altitude target to the control device.

[0049] A further improvement of the present invention lies in:

[0050] Before aiming at and tracking a low-altitude target entering the first preset area through the aiming device, the method for netting low-altitude targets further includes:

[0051] The control device obtains the position information of the low-altitude target;

[0052] When the low-altitude target enters the first preset area, the control device sends the position information to the aiming device.

[0053] Compared with the prior art, the beneficial effects of the present invention are as follows: By using electromagnetic catapult technology to launch the capture net, the capture range of the low-altitude target netting system can be effectively increased, and during the launching process, the launching parameters can be adjusted in real time, so that the control accuracy of the firing rate and the aiming accuracy can be effectively improved, and further the launching speed and the capture rate can be increased. Description of the Drawings

[0054] The above and other objects, features, and advantages of the present invention will become more apparent by describing the embodiments of the present invention in more detail with reference to the accompanying drawings. The drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0055] Figure 1 Schematic diagram of the structure of a low-altitude target net capture system based on electromagnetic catapult technology according to some embodiments of the present invention;

[0056] Figure 2 Schematic diagram of the structure of a net catapult device according to some embodiments of the present invention;

[0057] Figure 3 Schematic diagram of the structure of a net catapult device according to some other embodiments of the present invention;

[0058] Figure 4 Schematic diagram of the structure of an electromagnetic launch device according to some embodiments of the present invention;

[0059] Figure 5 Schematic diagram of the structure of a aiming device according to some embodiments of the present invention;

[0060] Figure 6 Functional block diagram of a prevention and control command platform according to some embodiments of the present invention;

[0061] Figure 7 Flow chart of a low-altitude target net capture method based on electromagnetic catapult technology according to some embodiments of the present invention;

[0062] Figure 8 Flow chart of a low-altitude target net capture method based on electromagnetic catapult technology according to some other embodiments of the present invention. Detailed implementation manners

[0063] In order to make the objectives, technical solutions, and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments of the present invention. It should be understood that the present invention is not limited by the exemplary embodiments described herein. Based on the embodiments of the present invention described herein, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

[0064] Since the existing net-catching method uses compressed air as the launch power source, there are problems such as short range, small capture range, and difficult real-time adjustment of launch parameters. The large fluctuations in the firing speed and aiming accuracy result in low launch speed and capture rate. Based on this, the present invention proposes a low-altitude target net-catching system and method based on electromagnetic catapult technology. The present invention will be further described in detail below with reference to the accompanying drawings.

[0065] First, refer to Figure 1 to describe the low-altitude target net-catching system based on electromagnetic catapult technology according to some embodiments of the present invention.

[0066] As Figure 1 shown, the low-altitude target net-catching system 100 based on electromagnetic catapult technology in the present invention at least includes: at least one aiming device 110, at least one electromagnetic launch device 120, at least one net bomb device 130, and a control device 140. Each aiming device 110, electromagnetic launch device 120, and net bomb device 130 are respectively communicatively connected to the control device 140.

[0067] The electromagnetic launch device 120 can be installed on the coaxial turntable of the aiming device 110. The net bomb device 130 is loaded into the electromagnetic launch device 120 by means of manual loading or automatic loading device. The aiming device 110 and the electromagnetic launch device 120 can be installed at a fixed location or on a movable vehicle. The aiming device 110 and the electromagnetic launch device 120 are both communicatively connected to the control device 140. Specifically, the communication method can be wired communication, such as Ethernet; or wireless communication, such as 4G / 5G network.

[0068] When a low-altitude target is found, the aiming device 110 identifies and tracks the low-altitude target to obtain the position information of the low-altitude target; the attitude of the electromagnetic launch device 120 is adjusted in real time according to the position information and ballistic calculation. The control device 140 generates a control command for capturing the low-altitude target. The aiming device 110 controls the electromagnetic launch device 120 to launch the net bomb device 130 through electromagnetic catapult based on the control command, and the net bomb device 130 captures the low-altitude target.

[0069] The low-altitude targets in the present invention can be unmanned aerial vehicles, birds, and other wild animals in the low altitude. Specifically, the unmanned aerial vehicle can be a micro or light unmanned aerial vehicle with a weight of 0.5 kg - 7 kg and a flight speed ≤ 25 m / s.

[0070] The system of the present invention can be applied to the safety protection of civil aviation airspace. For example, in response to the increasingly prominent threat of illegal unmanned aerial vehicles around civil airports, a multi-modal net bomb equipped with a parachute and positioning function is launched, so as to maintain the safety of airport airspace and ensure the safe operation of civil aviation; the system of the present invention can also be used for the safety protection of airspaces such as energy / power facilities, fortresses, and large event sites.

[0071] The low-altitude target net capture system based on electromagnetic catapult technology of the present invention can be deployed according to different application scenarios.

[0072] For example, when the range that needs to be protected is small, the number of aiming devices, electromagnetic launching devices, and net ammunition devices is one respectively. The vehicle-mounted mobile deployment method can be adopted to deploy the system on a mobile vehicle, thereby reducing the input cost and having flexible deployment.

[0073] When the range that needs to be protected is large, the number of aiming devices, electromagnetic launching devices, and net ammunition devices is N respectively, where N is a positive integer greater than or equal to 2. The low-altitude target net capture system can adopt a distributed deployment method. The net capture system is fixedly arranged at multiple installation points, and each installation point includes an aiming device, an electromagnetic launching device, and a net ammunition device. The control device can be arranged in the control center, so as to achieve a larger coverage range and greatly expand the strike range.

[0074] The low-altitude target net capture system provided by the present invention uses electromagnetic catapult technology to launch a capture net. Compared with the launch method using compressed air as the power, this method effectively improves the capture range of the low-altitude target net capture system. Compared with the common method of using compressed air to launch a capture net in the market, the present invention can expand the net capture distance by more than 400 meters. And during the launch process, the launch parameters can be adjusted in real time, improving the control accuracy of the launch speed and the aiming accuracy, and further improving the launch speed and capture rate. Compared with the existing electromagnetic interference or GPS navigation deception technology, the present invention adopts a physical net capture method, which will not generate electromagnetic waves and will not interfere with the communication facilities and electronic devices at the airport.

[0075] As Figure 2 shown, in some embodiments of the present invention, the net ammunition device 230 includes a combat unit 231 and a control unit 232. The control unit 232 is integrated in the ammunition body of the combat unit 231 and is communicatively connected. Specifically, the combat unit 231 and the control unit 232 can be arranged on the same circuit board.

[0076] Specifically, the combat unit 231 may include a capture net 2311, a net opener 2312, and an ammunition body 2313. The ammunition body 2313 can be cylindrical or conical, and the length-diameter ratio is between 4 and 6. After the capture net 2311 is opened, the ammunition body 2313 and the capture net 2311 fall to the ground together. A reliable net opener 2312 is configured in the ammunition body 2313. The net opener 2312 includes a fuse and a parachute actuator, and controls the capture net 2311 to open at a preset distance. The net opener 2312 uses compressed elastic energy storage as the power source and is triggered by a firing pin or controlled by an electrical signal to unfold. A traction block is configured on the capture net 2311, and the stored elastic potential energy is converted into the kinetic energy of the traction block at a preset time and space point, and the traction block drives the capture net 2311 to unfold radially along the ammunition body 2313 to capture the target unmanned aerial vehicle.

[0077] Specifically, the control unit 232 may include a timer 2321 and a positioning beacon 2322. The timer 2321 is used to set the time when the capture net 2311 is opened. The positioning beacon 2322 is used to locate the position where the target UAV and / or the capture net 2311 falls. The timer 2321 is communicatively connected to the net opener 2312. Specifically, the timer 2321 and the net opener 2312 may be integrated on the same circuit board.

[0078] By configuring a positioning beacon in the net ejection device, the position of the capture target and / or the capture net can be located, facilitating security personnel to quickly locate according to the positioning information, find the captured target and the capture net, and conduct evidence collection.

[0079] As Figure 3 shown, in some embodiments of the present invention, the net ejection device further includes a protection unit 333 in addition to the combat unit 331 and the control unit 332.

[0080] Specifically, the protection unit 333 may include a parachute 3331 and a parachute opener 3332. The parachute 3331 is installed at the tail end of the projectile body and is used to slowly descend to the ground after capturing the target. The parachute opener 3332 is used to control the opening of the parachute 3331.

[0081] During the process of capturing a low-altitude target, the fuse issues a parachute opening command to the parachute opener 3332, supporting two parachute opening actions. One is that the ejection charge in the parachute opener burns to generate high-pressure gas, and the other is by means of spring ejection. The ejection charge in the parachute opener burns to generate high-pressure gas, pushing the parachute cover out along the axial direction of the projectile body 2313. The parachute cover pulls the folded parachute out of the parachute compartment until the parachute ropes are straightened; when the parachute 3331 and the captured UAV start to fall, the air flow enters the interior of the parachute through the opening part of the parachute; the shape and design of the parachute enable the air to be effectively filled. As the falling speed increases, the air begins to push the parachute canopy, and the parachute canopy gradually opens; once the parachute body is fully filled with air, the pressure formed by the air on the surface of the parachute will generate lift, overcoming the work done by gravity, causing the parachute to slow down its descent until the falling speed remains constant.

[0082] Preferably, the protection unit 333 is arranged at the tail of the projectile body and is flexibly connected to the projectile body, so as to balance the center of gravity of the net ejection device and improve the flight stability.

[0083] By configuring a parachute on the net ejection device, the captured target and the net ejection device can be slowly descended to the ground, avoiding secondary hazards to ground personnel and facilities; at the same time, it can also protect the captured target, such as a UAV, from being severely damaged.

[0084] As Figure 4As shown, in some embodiments of the present invention, the electromagnetic launching device 420 may include: an electromagnetic driving module 421, a barrel and frame assembly 422, a control circuit 423, a safety protection device 424, and an ejection loading mechanism 425. The implementation of each functional unit may adopt the prior art. Only the components and functions thereof will be described below, and the specific implementation manners thereof will not be elaborated further.

[0085] The electromagnetic driving module 421 in the electromagnetic launching device 420 is electrically connected to the control circuit 423. The control circuit 423 is configured to provide an accurate driving signal, such as a current and / or voltage signal, to the electromagnetic driving module 421 to drive the electromagnetic coil in the electromagnetic driving module 421 to generate a magnetic field with a specific intensity and frequency, so as to achieve precise driving of the net projectile device to be launched.

[0086] The barrel and frame assembly 422 may include a barrel, a shock absorption device, and a support frame. The barrel is connected to the support frame through the shock absorption device. The support frame provides a stable structure for the barrel and frame assembly, enabling it to bear its own weight and various external forces during use. The barrel is a mechanism that imparts an initial velocity and direction to the net projectile device and accelerates the net projectile device. The shock absorption device can absorb the vibration and impact energy generated during the launching process of the net projectile device and reduce the amplitude and intensity of the vibration.

[0087] Preferably, the caliber of the barrel ranges from 30 mm to 40 mm. In the present invention, by analyzing the mechanical properties of the barrel and optimizing the barrel size, sufficient acceleration space can be provided for the net projectile device.

[0088] A sensor is installed on the barrel. The sensor transmits signals to the control circuit 423 for real-time monitoring of the launching state. In addition, a motor or actuator for controlling the attitude or position of the barrel is installed on the barrel and is electrically connected to the control circuit 423. It is driven and controlled by the control circuit 423 to ensure the stability and accuracy of the barrel during the launching process.

[0089] The safety protection device 424 is electrically connected to the control circuit 423. Various sensors in the safety protection device 424 will real-time monitor relevant parameters in the circuit. When an abnormal situation is detected, the safety protection device 424 immediately sends a signal to the control circuit 423. After receiving the signal, the control circuit 423 will quickly take corresponding protection measures, such as cutting off the power supply of the electromagnetic driving module 421 and stopping the launching process, to prevent equipment damage or safety accidents.

[0090] The ejection loading mechanism 425 is electrically connected to the control circuit 423 for signal transmission and control connection. The control circuit 423 sends control signals to the ejection loading mechanism 425 according to the firing process and instructions, controlling the ejection loading mechanism 425 to accurately load the to-be-fired net projectile device into the gun barrel and position it at a preset position before firing. At the same time, the ejection loading mechanism 425 also feeds back the loading status information to the control circuit 423, such as whether the loading is completed and whether the position of the net projectile device is correctly positioned, so that the control circuit 423 can perform the next operation.

[0091] The electromagnetic drive module 421 may include a multi-stage electromagnetic coil group, a magnetic field shielding layer, a cooling system, and a temperature monitoring system. The Ampere force generated by the electromagnetic coil is used to push the net projectile device in the gun barrel, and the electromagnetic launch device enables the net projectile device to reach the set muzzle velocity, with a striking radius of more than 400 meters. Here, the multi-stage electromagnetic coils are connected through a wire control circuit. The control circuit precisely controls parameters such as the magnitude, direction, and pulse frequency of the current input by the power supply to the electromagnetic coil according to the firing requirements, so that the electromagnetic coil generates a magnetic field that meets the requirements to drive the launch of the net projectile. The heat dissipation components of the cooling system are closely wound around the electromagnetic coil. The temperature sensors of the temperature monitoring system are installed at key parts of the electromagnetic coil group, such as the coil windings, etc. The sensors continuously monitor the temperature of the electromagnetic coil group and send the temperature signals to the control unit of the temperature control system. The control unit of the temperature monitoring system is interconnected with the control components of the cooling system. The temperature monitoring system determines whether to start the cooling system or adjust the working intensity of the cooling system based on the temperature information of the electromagnetic coil group monitored by the sensors. The magnetic field shielding layer physically wraps the outside of the electromagnetic coil tightly, preventing the magnetic field generated by the electromagnetic coil group from leaking outwards and reducing the electromagnetic interference to surrounding equipment and the environment.

[0092] The control circuit 423 may include a main controller, a drive circuit, a position sensor, and a communication interface. The position sensor can locate the coordinate position information of the net projectile device after landing, facilitating personnel to quickly find the net projectile that has slowly descended to the ground based on the positioning information. The communication interface may be a Controller Area Network (CAN) interface, an RS485 interface, and is not limited thereto. The drive circuit may be a drive circuit composed of Insulated-Gate Bipolar Transistors (IGBTs). The main controller can be implemented using a general-purpose processor, an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), a Digital Signal Processor (DSP), or a combination thereof. The above PLD may be a Complex Programmable Logic Device (CPLD), a Field-Programmable Gate Array (FPGA), a Generic Array Logic (GAL), or any combination thereof, and the embodiments of the present invention do not make specific limitations thereto.

[0093] The safety protection device 424 may include an overcurrent protection module, an overtemperature protection module, an emergency stop device, and a status detection module. The overcurrent protection module realizes automatically cutting off the circuit when there is an overcurrent situation in the circuit, such as an abnormal increase in current caused by a short circuit or equipment failure, to prevent electrical equipment from being damaged due to overcurrent. The overtemperature protection module realizes taking cooling measures or stopping the operation of the equipment when the electromagnetic catapult unit has an overheating situation, such as when the temperature of the electromagnetic drive system or the gun barrel exceeds the safety threshold, to prevent the equipment from aging due to overheating and the equipment from malfunctioning. The emergency stop device realizes stopping the launch process when the system detects an abnormal situation, such as when someone accidentally enters the catapult track or the equipment fails and may endanger the safety of personnel, to ensure the life safety of the on-site personnel.

[0094] The catapult loading mechanism 425 may include a magazine assembly, a positioning and calibration device, a quick locking device, a launch preparation status detection device, a cartridge jamming detection and ejection mechanism, and a loading control system. Each device or component in the catapult loading mechanism 425 can be implemented using existing technologies. Only its functions are briefly described below, and its specific implementation methods are not elaborated further.

[0095] The positioning and calibration device is fixedly connected to the main frame of the ammunition loading mechanism by bolts and is installed at the ammunition inlet to ensure the stability of its position accuracy. The quick locking device is electromagnetically connected to the magazine assembly to achieve quick locking and release, and is installed at the outlet of the magazine assembly to quickly lock after the ammunition is loaded in place to prevent accidental movement. The launch preparation status detection device is connected to the loading control system, and the signals detected by sensors and the like are transmitted to the loading control system by wire. The sensors are installed in the control circuit 423, such as the drive circuit, etc., to monitor the launch status of the system. The jam detection part is connected to the loading control system by sensors. When a jam is detected, the loading control system will issue corresponding instructions. The ejection mechanism is connected to the magazine assembly so that the jammed net ammunition device can be processed when needed.

[0096] In this embodiment, the ejection loading mechanism 425 is adopted, which can realize the automatic loading and automatic launching of the net ammunition device, greatly improving the hit rate of target capture.

[0097] Through the above electromagnetic launch device, due to the configuration of the ejection loading mechanism, the continuous launch of the net ammunition device can be realized, and the launch interval ≤ 8 seconds, thus greatly increasing the probability of capturing the target UAV.

[0098] It can be understood that the electromagnetic launch device 420 may further include a first communication module 426 and a power supply module 427. The first communication module 426 is used to realize data interaction between the electromagnetic launch device and the control device. The power supply module 427 is used to provide a power signal for the electromagnetic launch device 420, and can be composed of a vehicle-mounted power supply or a mobile power supply.

[0099] As Figure 5 shown, in some embodiments of the present invention, the aiming device 510 may include an optoelectronic device 511, a ballistic calculation device 512, a turntable device 513, and a meteorological environment sensor 514.

[0100] The meteorological environment sensor 514 is used to collect environmental information such as wind direction, wind speed, and temperature in real time. The optoelectronic device 511 is used for target recognition and tracking. The turntable device 513 is used to adjust the attitude according to the target position. The optoelectronic device 511 includes a dual-spectrum camera composed of a visible light camera and an infrared camera. The visible light camera is used for target recognition during the day. The infrared camera is used for target recognition at night. The dual-spectrum camera collects target images and performs recognition based on the collected images. The control device, such as a vehicle-mounted air defense command platform, can control the turntable device to adjust the attitude in real time to achieve target tracking and ensure that the target is always in the monitoring screen of the air defense command platform.

[0101] The ballistic calculation device 512 is used for real-time ballistic calculation, correction, and launch control. Specifically, the ballistic calculation device 512 can adopt an embedded computing platform, and a computer program is installed in the computer platform. The computer program can include, but is not limited to, a ballistic calculation model, an environmental impact compensation model, an implementation correction model, and a lead calculation model. The ballistic calculation and its related correction and compensation methods in the present invention can be implemented by existing technologies, so no further description will be given.

[0102] In this embodiment, ballistic calculation is performed based on the target position, fully considering the influence of the target movement trajectory, meteorological environment factors, etc., greatly improving the capture accuracy.

[0103] It can be understood that the aiming device may further include a second communication module 515, and the second communication module 515 is used to realize data interaction between the aiming device and the control device.

[0104] During the operation of the low-altitude target netting system, when the ballistic calculation device 512 in the aiming device 510 receives the position data (such as azimuth, distance, angle, speed, etc.) of a target (such as a drone) sent by the detection system, the computer program deployed on the ballistic calculation device 512 performs real-time data fusion processing, constructs an accurate target motion state evaluation model, and realizes the solution of the target three-dimensional coordinates, speed, ballistic prediction, and fire control. The optoelectronic device 511 identifies the target, and the turntable device 513 adjusts the attitude according to the azimuth information of the target, turns to the target, and realizes accurate tracking and state estimation of the target. After the aiming device completes target tracking and aiming, the launch command is issued by the air defense command platform.

[0105] In some embodiments of the present invention, the low-altitude target netting system is communicatively connected to the detection and identification system.

[0106] The detection and identification system is used to detect low-altitude targets entering the third preset area, obtain the position information and speed information of the low-altitude targets, and send the position information and speed information to the low-altitude target netting system.

[0107] The detection and identification system can be implemented by existing technologies and will not be elaborated here.

[0108] The range of the third preset area for detection by the detection and identification system includes at least the aiming area of the aiming device. When the low-altitude target netting system includes multiple aiming devices, the range of the third preset area includes at least the sum of the aiming area ranges of the multiple aiming devices.

[0109] The low-altitude target netting system receives the data sent by the detection and identification system in real time to realize the identification and tracking of the target. When the target invades the security protection area, netting can be carried out.

[0110] In some embodiments of the present invention, the control device may be a prevention and control command platform. The prevention and control command platform can be communicatively connected to the existing detection and identification system, receive the data sent by the detection and identification system in real time, comprehensively consider the data of each sensor, and reduce the influence of the environment on the target recognition accuracy.

[0111] The prevention and control command platform consists of a software system and a hardware platform.

[0112] As Figure 6 shown, the prevention and control command platform is configured with communication interfaces for each device, and can realize communication and data interaction with the aiming device, electromagnetic emission device, and net bomb device.

[0113] Please continue to refer to Figure 6 , the prevention and control command platform is also used to implement functions such as countermeasure capture, track display, area management, whitelist management, record query, device status monitoring, video capture, device management, and user management.

[0114] Specifically, area management is used to preset the detection area and the combat area, and the range of the detection area is larger than that of the combat area. For example, when a target that may invade the airport with a stable track is found on the radar map, the low-altitude target net capture system can be guided to be in place. When the target enters the detection range of the optoelectronic device, image detection, identification, tracking, and positioning, as well as aiming, are carried out. When the target enters the combat area, after manual confirmation, countermeasures are implemented to capture the target. In addition, countermeasure capture is used to generate corresponding countermeasure commands in response to user instructions and send them to the electromagnetic emission device; track display is used to intuitively display the preset area on the electronic map, such as the flight track of the invading low-altitude target in the detection area; device status monitoring is used to receive the operation status information of each device in the low-altitude target net capture system in real time and generate a display interface for display on the terminal device for users to view the device operation status in real time; record query is used to save the capture information of the low-altitude target and generate capture records that meet the query conditions according to the user's query instructions; video capture is used to receive the video images of the low-altitude target collected by the aiming device in real time and save the target images that meet the preset conditions; user management is used to manage user information, clarify the functions and operation permissions of users through permission configuration, and provide user login, logout, cancellation, and registration functions; device management is used to perform device registration, parameter configuration, etc. on each device in the low-altitude target net capture system. The whitelist is used for the identification of friend or foe of the UAV target. For the target UAVs that are performing normal operation tasks, they are set as the whitelist. For the UAVs that are not performing normal operation tasks and are illegally invading, they are set as the blacklist. When the system detects that the target is on the whitelist, the net capture task will not be executed; when the system detects that the target is on the blacklist, the net capture task will be executed.

[0115] Through the prevention and control command platform, methods such as automatic identification, self - calculation, combination of automatic and manual strikes can be carried out, greatly improving the informatization level and automation level, and reducing the complexity of personnel operations. At the same time, no professional drone pilots and drivers are required to intervene.

[0116] Next, with reference to Figure 7 to describe the low - altitude target net - capture method based on electromagnetic catapult technology in some embodiments of the present invention.

[0117] As Figure 7 shown, the method includes the following steps S710 - step S720.

[0118] Step S710: When a low - altitude target enters the first preset area, the aiming device aims at and tracks the low - altitude target.

[0119] Step S720: When the low - altitude target enters the second preset area, the control device controls the electromagnetic launching device to launch the net - projectile device to capture the low - altitude target.

[0120] In the present invention, the range of the first preset area is larger than that of the second preset area. The first preset area can be a detection area, and the second preset area can be a combat area. For example, when a target with a stable flight track that may invade the airport is found in the detection area, the low - altitude target net - capture system can be guided to be in place for image detection, recognition, tracking, positioning, and aiming. When the target enters the combat area, counter - measures for capturing the target are implemented.

[0121] In the present invention, the control device can be set in the prevention and control command center and is realized through the hardware and software of the prevention and control command platform.

[0122] The low - altitude target net - capture method provided by the present invention effectively improves the capture range of the low - altitude target net - capture system, and can expand the net - capture distance by more than 400 meters. And during the launching process, the ballistic calculation model can receive the real - time position information of the target from the detection system, and take complex and variable environmental factors such as wind direction, wind speed, rain, and snow into the influence factors of the ballistic model. According to the real - time changing target position information and weather information, and based on the reinforcement learning method, the launching timing selection and ballistic planning strategy can be optimized to realize the real - time adjustment of launching parameters, improve the control accuracy of the firing rate and the aiming accuracy, thereby improving the interception efficiency.

[0123] Next, with reference to Figure 8 to describe the low - altitude target net - capture method based on electromagnetic catapult technology in some other embodiments of the present invention.

[0124] Step S810: The prevention and control command platform obtains the position information of the unmanned aerial vehicle; specifically, the position information of the unmanned aerial vehicle can be obtained from the detection and recognition system.

[0125] Step S820: When the UAV enters the detection area, the prevention and control command platform sends the position information to the aiming device.

[0126] The prevention and control command platform receives the position information of the target UAV from the detection and identification system, such as azimuth, distance, angle, speed, etc.; the prevention and control command platform sends the UAV position information to the aiming device so that the aiming device can aim and track.

[0127] Step S830: The aiming device aims at and tracks the UAV.

[0128] Specifically, the aiming device includes optoelectronic equipment and a ballistic calculation device, such as a ballistic computer, a turntable device, and a meteorological environment sensor.

[0129] When the low-altitude target is a UAV, the steps for the aiming device to aim at and track the low-altitude target include:

[0130] The optoelectronic equipment conducts type identification on the target to determine whether the target is a UAV, a bird, or others, etc.; if it is a UAV, the discrimination result and the position information of the target UAV are sent to the ballistic computer.

[0131] The ballistic computer integrates the meteorological sensor data and the position information of the target UAV, constructs an accurate target motion state evaluation model, creates a ballistic model, and fully considers environmental impact compensation and implements a correction algorithm to calculate the lead.

[0132] The aiming device controls the servo turntable according to the calculated ballistic model, and turns the optoelectronic equipment and the electromagnetic gun muzzle towards the position of the target UAV for positioning and tracking.

[0133] Step S840: The aiming device uploads data such as the target image and the ballistic model to the prevention and control command platform, and the platform performs image analysis and then displays the real-time tracking picture of the target UAV.

[0134] Step S850: When the UAV enters the combat area, the prevention and control command platform sends a countermeasure command to the electromagnetic launch device.

[0135] Step S860: The power module provides a power source for the electromagnetic launch device and launches the net projectile device to capture the UAV.

[0136] The supporting power module charges the metal coil of the electromagnetic launch device to generate an electric current, forming a strong magnetic field around the coil. The changing magnetic field generates an induced electromotive force in the coil of the net projectile device, and then generates an induced current. Under the action of the Ampere force, the net projectile device is accelerated and pushed towards the gun barrel and reaches the set muzzle velocity, thus realizing the launch of the net projectile device. The present invention supports a continuous launch mode.

[0137] When the net projectile device approaches the target, at the time point calculated according to the ballistic model and in coordination with the timer configured in the net projectile device, the net opening device is triggered by means of compressed elastic energy storage, and the stored elastic potential energy is converted into the kinetic energy of the traction block. The traction block drives the capture net to expand radially, thereby interfering with and wrapping the target UAV.

[0138] Preferably, after capturing the UAV, the low-altitude target net capture method further includes:

[0139] Step S870: Slowly lower the UAV to the ground through a parachute.

[0140] During the net capture process, once the capture net wraps the UAV, when the fuse sends an opening parachute command to the parachute actuator, the parachute actuator pushes the parachute cover along the bullet axis through high-pressure gas. The wrapped target UAV and the net projectile device together slowly descend to the ground under the action of the parachute, realizing the flexible capture of the low-altitude target and avoiding secondary hazards to ground personnel and facilities; at the same time, it can also protect the captured target, such as the UAV, and avoid causing greater damage to the target.

[0141] Preferably, after capturing the UAV, the low-altitude target net capture method further includes:

[0142] Step S880: The positioning beacon sends the position information of the captured UAV to the prevention and control command platform.

[0143] The positioning beacon in the net projectile device sends the positioning information to the prevention and control command platform, and security personnel can quickly locate according to the positioning information, and achieve rapid evidence collection or recovery of the target UAV or the net projectile device while expanding the capture radius.

[0144] The present invention can also be tried to be applied to airport bird repelling, wild animal driving / capturing, etc., which is of great significance for maintaining the safety of airport airspace and ensuring the safe operation of civil aviation.

[0145] Finally, it should be noted that the above technical solution is only one implementation manner of the present invention. For those skilled in the art, based on the application methods and principles disclosed in the present invention, it is very easy to make various types of improvements or deformations, not limited to the methods described in the above specific implementation manners of the present invention. Therefore, the previously described manner is only preferred and does not have a restrictive meaning.

Claims

1. A low-altitude target net-capturing system based on electromagnetic catapult technology, characterized in that: The low-altitude target net capture system includes: at least one aiming device, at least one electromagnetic launching device, at least one net projectile device, and a control device. Each of the aiming device, the electromagnetic launching device, and the net projectile device is communicatively connected to the control device; The control device is configured to generate a control instruction for capturing a low-altitude target; The aiming device is configured to identify and track the low-altitude target to obtain the position information of the low-altitude target, perform real-time ballistic calculation according to the position information and adjust the attitude of the electromagnetic launching device, and control the launching of the electromagnetic launching device based on the control instruction; The electromagnetic launching device is configured to launch the net projectile device by electromagnetic ejection; The net projectile device is disposed in the electromagnetic launching device, and the net projectile device is configured to capture a low-altitude target.

2. The low-altitude target netting system based on electromagnetic catapult technology according to claim 1, wherein: The electromagnetic launching device includes: a control circuit, an electromagnetic driving module, a barrel and frame assembly, and an ejection loading mechanism that are communicatively connected to the control circuit respectively; The control circuit is configured to drive and control the barrel in the barrel and frame assembly to control the attitude of the barrel during launching; The control circuit is further configured to control the ejection loading mechanism to load the net projectile device to be launched into the barrel and position it at a preset position before launching; The control circuit is further configured to provide a driving signal to the electromagnetic driving module to drive the electromagnetic coil in the electromagnetic driving module to generate a magnetic field to achieve the driving of the net projectile device.

3. The low-altitude target netting system based on electromagnetic catapult technology according to claim 1 or 2, characterized in that: The net projectile device includes a combat unit and a control unit, and the control unit is communicatively connected to the combat unit; The combat unit includes a capture net, a net opener, and a projectile body. The net opener is disposed at the front end of the projectile body, and the net opener controls the capture net to open at a preset distance; The control unit includes a timer and a positioning beacon. The timer is used to set the time for the capture net to open, and the positioning beacon is used to locate the captured low-altitude target and / or the position where the capture net falls.

4. The low-altitude target netting system based on electromagnetic catapult technology according to claim 3, characterized in that: The net projectile device further includes a support unit; The support unit includes a parachute and a parachute opener. The parachute is installed at the tail of the projectile body and is used to slowly descend to the ground after capturing the low-altitude target; The parachute opener is used to control the parachute to open after capturing the low-altitude target.

5. The low-altitude target net-capturing system based on electromagnetic catapult technology according to claim 1 or 2, characterized in that: The aiming device includes: optoelectronic equipment, a ballistic calculation device, a turntable device, and a meteorological environment sensor. The optoelectronic equipment, the ballistic calculation device, the turntable device, and the meteorological environment sensor are communicatively connected; The meteorological environment sensor is used to collect environmental information in real time; The optoelectronic equipment is used to identify and track the low-altitude target to obtain the position information of the low-altitude target; The turntable device is used to adjust the attitude of the electromagnetic launching device according to the position information; The ballistic calculation device is used to perform real-time ballistic calculation according to the position information and the environmental information and control the launching of the electromagnetic launching device.

6. The low-altitude target netting system based on electromagnetic catapult technology according to claim 1 or 2, characterized in that: The low-altitude target net capture system is communicatively connected to a detection and identification system; The detection and recognition system is used to detect the low-altitude target entering the third preset area, obtain the position information and speed information of the low-altitude target, and send the position information and the speed information to the low-altitude target netting system.

7. A low-altitude target net-capturing method based on electromagnetic catapult technology, which is applied to the low-altitude target net-capturing system based on electromagnetic catapult technology described in any one of claims 1 to 6, and is characterized in that: The low-altitude target netting method includes: When the low-altitude target enters the first preset area, the aiming device aims at and tracks the low-altitude target; When the low-altitude target enters the second preset area, the control device controls the electromagnetic launching device to launch the net projectile device to capture the low-altitude target.

8. The method for net-capturing low-altitude targets based on electromagnetic catapult technology according to claim 7, characterized in that: After capturing the low-altitude target, the low-altitude target netting method further includes: Slowly lowering the low-altitude target to the ground through a parachute.

9. The low-altitude target net-capturing method based on electromagnetic catapult technology according to claim 7, wherein: After capturing the low-altitude target, the low-altitude target netting method further includes: The positioning beacon sends the position information of the captured low-altitude target to the control device.

10. The low-altitude target net capture method based on electromagnetic catapult technology according to any one of claims 7-9, characterized in that: Before the aiming device aims at and tracks the low-altitude target entering the first preset area, the low-altitude target netting method further includes: The control device obtains the position information of the low-altitude target; When the low-altitude target enters the first preset area, the control device sends the position information to the aiming device.

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