CN112902756A - Low-slow small-flight target designated point trapping method based on low-altitude rejection system - Google Patents
Low-slow small-flight target designated point trapping method based on low-altitude rejection system Download PDFInfo
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- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
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Abstract
The invention provides a low-altitude denial system which integrates functions of target detection, interference, designated position trapping, forced landing and the like, and designs an effective detection, detection and interference method aiming at low-speed small-flight targets to effectively attack a black-flying unmanned aerial vehicle so as to ensure the low-altitude safety of a designated monitoring area. The low-altitude rejection system is an unmanned aerial vehicle defense system which is composed of frequency spectrum detection equipment, radar detection equipment, photoelectric equipment, interference suppression equipment, deception interference equipment, positioning and orientation equipment and a vehicle-mounted platform, receives various information fed back by the equipment, monitors the state of the equipment in real time, detects small low-speed flying targets in a protective area, identifies and strikes the targets, and completes a low-altitude rejection task in cooperation. The method can effectively detect, interfere and strike the target of the black flying unmanned aerial vehicle in the protection area, can trap the unmanned aerial vehicle to a designated position and force the unmanned aerial vehicle to land, completes the collection of the black flying unmanned aerial vehicle, and can be used for subsequent evidence taking.
Description
Technical Field
The invention belongs to the technical field of unmanned aerial vehicle management control, and particularly relates to a low-slow small-flight target designated point trapping technology based on a low-altitude denial system.
Background
Chinese patent publication CN108037545A discloses a directional optical interference system for unmanned aerial vehicles, which includes an unmanned aerial vehicle early warning identification device, an unmanned aerial vehicle positioning and locking device, a directional interference device, a console and an energy device. The method has the advantages that the directional optical interference on the unmanned aerial vehicle is realized, the problem that the interference means of the unmanned aerial vehicle is single, the optical interference on the invading unmanned aerial vehicle cannot be effectively solved, and the information protection on a target area cannot be realized. Through carrying out directional interference to invading unmanned aerial vehicle, with the directional transmission of interfering signal to invading unmanned aerial vehicle, avoided the loss of energy and produced optical pollution to the protected area, guaranteed the normal clear of production life in the protected area.
Chinese patent publication CN111999730A discloses a method and system for positioning a flying hand of a black flying unmanned aerial vehicle, according to the flight track of a target unmanned aerial vehicle detected by a radar, by performing multi-point hovering, sensing and direction finding on a ground remote control signal of the target unmanned aerial vehicle, accurate positioning of a control terminal, namely, the flying hand, of the target unmanned aerial vehicle is realized by using a multi-point cross positioning method, and evidence is obtained through a photoelectric device, the method and system have the characteristics of fast and accurate positioning, simple operation, long action distance and the like, and can be applied to accurate positioning and evidence obtaining of the control terminal, namely, the flying hand, of the black flying unmanned aerial vehicle in a low-altitude security defense system.
Chinese patent publication CN112000133A discloses a low-altitude aircraft/flyer identification system, a counter-control system and an identification method, which determine the preliminary position of a low-altitude aircraft/flyer according to a low-altitude aircraft signal and a remote control signal by detecting, intercepting and identifying the low-altitude aircraft signal and the remote control signal in a control area in real time; the method comprises the steps of calling a monitoring video of the initial position of the low-altitude aircraft/the initial position of the flyer according to the initial position of the low-altitude aircraft/the initial position of the flyer, matching flyers in the video with preset characteristics of the low-altitude aircraft/matching pedestrians in the video with the preset characteristics of the flyer, and identifying appearance information of the low-altitude aircraft from the monitoring video.
Since the beginning of the 21 st century, the unmanned aerial vehicle industry has rapidly developed and is widely applied to various industries. The unmanned aerial vehicle quantity, the kind increase fast, and the function is constantly strengthened, not only can carry out tasks such as information monitoring investigation, target indication, communication relay, electronic countermeasure, still can carry on the weapon and carry out the strike task, and its development receives high attention from all countries with the use. However, the accompanying phenomena that the unmanned aerial vehicle breaks into a sensitive area and the aviation order is disturbed frequently occur, so that great potential safety hazards exist, and great challenges are brought to social security. Therefore, the anti-unmanned aerial vehicle product is suitable for transportation and life, and the field of military national defense and civil security and protection is rapidly increased.
At present, a common unmanned aerial vehicle interference device in the market is an interference gun, or a system consisting of a single detection device and an interference device has the defects of low detection precision, poor interference effect, limited use scene, incapability of directionally recovering targets and the like.
Disclosure of Invention
In order to solve the technical problem, the invention provides a low-altitude rejection system for a low-slow small-flight target, which comprises: the system comprises frequency spectrum detection equipment, radar detection equipment, photoelectric equipment, interference suppression equipment, deception interference equipment, positioning and orientation equipment and a vehicle-mounted platform; the control center of the low-altitude rejection system interacts with radar detection equipment, frequency spectrum detection equipment, photoelectric equipment, interference suppression equipment and deception interference equipment through comprehensive control software, and controls any one of the frequency spectrum detection equipment, the radar detection equipment and the photoelectric equipment to carry out target detection independently or a plurality of detection equipment are combined to complete a target detection task; the control center issues control instructions to the interference suppression device and the deception interference device, controls generation and emission of interference signals and deception signals, and monitors working states of the interference suppression device and the deception interference device in real time; the low-altitude rejection system can use various detection devices to find low-slow small flying targets flying in the protection area, and performs target identification and striking on the found low-slow small flying targets.
Further, the low-altitude rejection system detects the frequency spectrum information of the target through frequency spectrum detection equipment, and identifies the type and flight direction information of the detected target; and the frequency spectrum detection equipment transmits target position information back to the control center.
Further, the control center of the low-altitude rejection system guides the radar detection equipment to search the target in the area near the designated position according to the target position information provided by the frequency spectrum detection equipment; when the radar detects a target, the photoelectric equipment is guided to search the target through the radar detection target position information, and secondary confirmation is carried out on the target according to real-time image information returned by the photoelectric equipment.
Furthermore, the photoelectric device of the low-altitude rejection system locks the target and automatically tracks the target after searching the target through an image processing algorithm, and meanwhile, the working mode of the radar detection device is switched from a searching mode to a single-target tracking mode, so that target position information with higher precision and higher refresh rate is provided for a control center.
Furthermore, the control center of the low-altitude rejection system determines that the detected target approaches a defense red line area, and starts a designated point trapping system and a parallel dynamic pressure interference device and a deception interference device through comprehensive control software to interfere and attack the target.
Further, the measures of the low-altitude rejection system to perform interference and attack on the target include, but are not limited to: the unmanned aerial vehicle remote control system comprises an unmanned aerial vehicle, a remote controller, a control center, a forced landing mode and a remote control system.
The invention also provides a low-altitude rejection system-based low-slow small-flight target designated point induction method, which comprises the following steps:
step 1, a control center of the low-altitude rejection system controls radar detection equipment to track a low-speed small flying target discovered by frequency spectrum detection equipment, and returns real-time azimuth angle, pitch angle, speed and distance information of the tracked target to the control center;
step 2, the control center controls the rotation of the rotary tables of the interference suppression equipment and the deception jamming equipment according to the target azimuth angle and the target pitch angle of the low-slow small-flight target detected by the radar, so that the interference suppression equipment and the deception jamming equipment are aligned to the target;
step 3, the control center controls to open the deception jamming equipment, sets the transmitting power value of the deception jamming equipment according to the distance between the flying target and the low-altitude rejection system, sends a suppression jamming signal and cuts off a path between the flying target and the satellite signal;
step 4, simultaneously, the control center deceives the interference equipment to generate false GPS information to decoy the unmanned aerial vehicle;
step 5, opening interference suppression equipment, suppressing a control signal of the remote controller of the unmanned aerial vehicle, avoiding the cheating failure caused by reconnection of the unmanned aerial vehicle and the remote controller thereof, and enabling the unmanned aerial vehicle to be always under the control of the cheating interference equipment;
and 6, after the flying target approaches or reaches the trapping destination position, the deception jamming equipment starts a forced landing function, sends the GPS coordinates of the landing area to the flying target, controls the flying target to automatically land, and controls the deception jamming equipment to continuously interfere with the target until the target lands.
Further, the step 4 comprises the sub-steps of:
step 4.1, the control center receives the flying target returned by the radar detection equipment in real time and generates position information of a position where the flying target is tricked into;
and 4.2, calculating the relative distance and the direction between the real-time position of the flying target and the decoy position by the control center, resolving the direction information of the decoy control, generating a group of false GPS data, sending the false GPS data to the target unmanned aerial vehicle by the decoy interference equipment, and executing the function of directing the decoy.
Further, the real-time position information of the flight target returned by the radar detection device includes: longitude and latitude, azimuth angle, pitch angle and distance.
Further, the operation of opening the suppression interference device and the operation of deception interference in the step 5 are alternately and repeatedly executed, so that the unmanned aerial vehicle is prevented from reestablishing connection communication with a remote controller thereof, and the deception interference is prevented from being invalid.
The method can effectively detect, interfere and strike the target of the black flying unmanned aerial vehicle in the protection area, can trap the unmanned aerial vehicle to a designated position and force the unmanned aerial vehicle to land, completes the collection of the black flying unmanned aerial vehicle, and can be used for subsequent testification.
Drawings
FIG. 1 is a schematic diagram of the low-altitude rejection system of the present invention;
FIG. 2 is a point-specific spoofing workflow of the present invention.
Fig. 3 is a flow chart of the designated point spoofing function operation of the present invention.
Detailed Description
The invention provides a low-speed small-flight target designated point trapping technology and a system. The system integrates the functions of target detection, interference and the like, and an effective rejection method is designed for low-slow small unmanned aerial vehicle targets (low flying height, slow flying speed and small size), the targets are hit and finally land in a designated area, the unmanned aerial vehicle is recovered, and the low-altitude safety of a monitoring area is effectively guaranteed. The low-altitude denial system provided by the invention integrates the functions of target detection, interference, designated position trapping, forced landing and the like, and an effective detection, detection and interference method is designed for small and low-altitude targets such as small unmanned aerial vehicles with low flying height, low flying speed and small size, so that the black unmanned aerial vehicle is effectively attacked to ensure the low-altitude safety of a designated monitoring area.
(1) The target is detected through the frequency spectrum detection equipment, the approximate azimuth information is provided, the radar is guided to search the azimuth, the search efficiency of the radar is improved, and meanwhile, the target missing detection caused by poor radar detection effect due to shielding of buildings and the like is avoided.
(2) The target is searched and tracked by the photoelectric equipment guided by the radar detection equipment, and interference striking treatment is carried out after the target is simultaneously detected and confirmed by the double equipment, so that the working efficiency of the system is improved, and interference and useless striking caused by other flying objects or clutter on target judgment are avoided.
(3) The target is tracked in real time through the radar, the target position information with higher frequency and higher precision is improved for the system, data support is provided for the subsequent appointed point trapping function, and a more accurate trapping instruction is provided.
(4) Through a series of control strategies, the interference equipment is suppressed in a linkage mode, the deception interference equipment works in a cooperative mode, communication between the unmanned aerial vehicle and the remote controller is cut off, the deception interference equipment takes over control over the unmanned aerial vehicle, the current position and the deception position of the unmanned aerial vehicle are resolved, the deception GPS information is generated in real time and sent to the unmanned aerial vehicle, the unmanned aerial vehicle is controlled to fly to the appointed position, the unmanned aerial vehicle is converted into a forced landing mode after arriving at the appointed position, the unmanned aerial vehicle lands in situ, and recovery of the unmanned aerial vehicle.
The invention provides a low-speed small-flight target designated point decoy technology and a system thereof, which is an unmanned aerial vehicle defense system consisting of frequency spectrum detection equipment, radar detection equipment, photoelectric equipment, interference suppression equipment, deception interference equipment, positioning and orienting equipment, a vehicle-mounted platform and comprehensive control software, wherein all the equipment are arranged on the vehicle-mounted platform, the maneuverability is high, and the system is shown in an attached figure 1.
The frequency spectrum detection equipment, the radar detection equipment and the photoelectric equipment form a target detection subsystem, can be suitable for different working scenes, and complete a target detection task by single equipment or a plurality of equipment combinations. The spectrum detection device is a low-power passive detection device, and passive detection is performed on the unmanned threat target in a radio direction finding and cross positioning mode; the radar detection device is a high-power detection device, acquires a target echo signal by transmitting high-power and high-frequency electromagnetic waves, and forms high-precision information such as a target position, a target speed and the like after data processing, so that the radar detection device has the characteristics of all-weather and all-day work; the photoelectric equipment outputs a high-resolution image through the high-performance visible light lens, has a quick zooming and focusing function, can collect target image data for subsequent evidences, and is provided with the infrared light lens to ensure target monitoring of a working scene at night.
The target interference attack subsystem is composed of interference suppression equipment and deception interference equipment, can adapt to different working scenes, and completes a target attack task by using single equipment or combination of the two equipment. The interference suppression device is a high-power interference device, can suppress unmanned aerial vehicle communication signals and realizes the impact mode of forced landing and return voyage of the unmanned aerial vehicle; the deception jamming device is a low-power jamming device, can take over the control right of the unmanned aerial vehicle by sending false GPS information to the unmanned aerial vehicle, and can be deceived to fly in a designated mode, so that the striking mode of forced landing and driving away in a designated direction of the unmanned aerial vehicle is realized. The interference devices have a larger beam coverage range, namely a wider interference range, and under the condition that the target position information accuracy is lower, the target interference striking can be realized by covering the target through the beam.
The whole system is powered by vehicle-mounted power supply equipment, and the integrated control software completes communication with all the equipment (radar detection equipment, frequency spectrum detection equipment, photoelectric equipment, interference suppression equipment and deception interference equipment) through the switch. The method specifically comprises the steps of issuing a control instruction to control each device to work, receiving various information fed back by each device, monitoring the state of each device in real time, monitoring the working state and the running state of the whole system, having the functions of displaying the situation of a designated monitoring area, displaying the information of a monitored target, displaying a target flight track, displaying a target photoelectric monitoring image, handling the target by one key and the like, identifying and striking small and slow targets flying in a protective area, and completing a low-altitude rejection task.
The system work flow is as follows, and the work flow chart is shown in the attached figure 2.
(1) And starting comprehensive control software, and configuring a working scene and working equipment according to the requirement of the protection area.
(2) And (4) electrifying the equipment, and establishing a communication link with each equipment through comprehensive control software to complete equipment self-inspection.
(3) The current GPS position information and the current azimuth information are returned through the positioning and orienting equipment, calibration of each equipment is completed, and coordinates of each equipment are unified.
(4) And opening the investigation detection equipment and starting the monitoring work of the protection area.
When the unmanned aerial vehicle flies in the area, the frequency spectrum detection equipment can detect the frequency spectrum information of the target and identify the type and flight direction information of the target; target position information is returned through the frequency spectrum detection equipment, and the radar detection equipment is guided to search a target near a specified position; if the frequency spectrum detection equipment cannot be used, the radar detection equipment can directly carry out 360-degree all-directional search; when the radar detects a target, the photoelectric equipment is guided to search through the radar detection target position information, and the target can be secondarily confirmed according to the real-time image information returned by the photoelectric equipment; the photoelectric equipment locks the target and automatically tracks the target after searching the target through an image processing algorithm, and meanwhile, the radar detection equipment is converted from a searching mode to a single-target tracking mode, so that target position information with higher precision and higher refresh rate is provided for the system; if the target approaches the defense red line area, the appointed point trapping function can be started, the interference equipment and the deception interference equipment are pressed in a linkage mode, and interference striking is conducted on the target.
The flow of the point-designated spoofing function is as follows, and the working flow chart is shown in figure 3.
(1) Firstly, tracking a target through radar detection equipment, returning information such as a real-time azimuth angle, a pitch angle, speed, distance and the like of the target, and controlling the rotation of a turntable of the suppression interference equipment and the deception interference equipment through the azimuth angle and the pitch angle of the target to align the target.
(2) Opening deception jamming equipment, setting a transmitting power value of the deception jamming equipment according to the distance between the target and a defense center (namely the equipment position), sending a transient suppression jamming signal, cutting off a path of signals of the target unmanned aerial vehicle and the satellite, and recording the current GPS coordinate information when the unmanned aerial vehicle is in a hovering state.
(3) The radar detection equipment returns real-time position information (longitude and latitude, azimuth angle, pitch angle, distance and the like) of the target and position information to be cheated by the target, calculates the relative position of the target and solves the direction information of cheating control.
The positioning and orienting equipment feeds back system deployment position information, which comprises longitude Lng1, latitude Lat1, altitude H1 and north-seeking angle N, and radar detection equipment feeds back a target azimuth angle A, a target pitch angle E and a target Euclidean distance D. The target longitude Lng2, the target latitude Lat2 and the target altitude H2 are:
Rc＝6378137
Rj＝6356725
H2＝H1+D*cos(E)
if the spoofing position is longitude Lng3, latitude Lat3 and height H3, the spoofing direction C is:
LngDiff＝Lng3-Lng2
LatDiff＝Lat3-Lat2
a group of false GPS data is generated by the information and is sent to the target unmanned aerial vehicle through deception jamming equipment, and the designated direction deception function is executed.
(4) And generating false GPS data simulation satellite data through deception jamming equipment according to the deception control azimuth information, and sending the false GPS data simulation satellite data to the unmanned aerial vehicle for deception. The unmanned aerial vehicle has certain error information filtering capacity, when the unmanned aerial vehicle receives the GPS data, the GPS data is compared with the position information recorded before, and if the position change is overlarge, the unmanned aerial vehicle judges that invalid data do not respond; if the sending interval of the decoy GPS data is too long, the unmanned aerial vehicle receives the two times of the decoy GPS coordinate position change, and the unmanned aerial vehicle also judges that invalid data does not respond, so that the decoy fails. Therefore, the high-frequency and high-precision target position information provided by the radar detection equipment in the single-target tracking mode provides support for deception jamming equipment to generate high-precision and effective GPS data in real time. After the unmanned aerial vehicle receives false GPS data sent by the deception jamming equipment and judges the false GPS data to be valid data, the actual position of the unmanned aerial vehicle is not changed because the unmanned aerial vehicle is in a hovering state, but the false GPS data enables the unmanned aerial vehicle to mistakenly think that the current position has deviation, in order to correct the position of the unmanned aerial vehicle, the unmanned aerial vehicle can record the GPS position direction when hovering, namely, the unmanned aerial vehicle flies in a deception path, and the unmanned aerial vehicle continuously receives the GPS false data with continuous coordinate information, so that the continuous deception flying in the specified direction can be realized.
(5) And opening the interference suppression equipment, suppressing the control signal and the satellite signal of the remote controller of the unmanned aerial vehicle, and avoiding that the unmanned aerial vehicle receives the correct satellite signal or is reconnected with the remote controller to cause the cheating failure, so that the unmanned aerial vehicle is always under the control of the cheating interference equipment.
(6) When the target approaches and reaches the decoy destination position, the deception jamming device starts the forced landing function, sends the GPS coordinates of the no-fly zone to the unmanned aerial vehicle, the unmanned aerial vehicle can automatically start landing after being identified, and the target is continuously forced landed and hit through the deception jamming device until the target lands.
Therefore, the designated point trapping function of the unmanned aerial vehicle is completed.
Through this function, can carry out effectual listening, interference and strike to the black unmanned aerial vehicle target that flies in the protection zone, can lure unmanned aerial vehicle to the assigned position and force to land, accomplish the collection that black unmanned aerial vehicle flies, can make follow-up proof and use. The low-altitude rejection system is an unmanned aerial vehicle defense system which is composed of spectrum detection equipment, radar detection equipment, photoelectric equipment, pressing interference equipment, deception interference equipment, positioning and orienting equipment and a vehicle-mounted platform, and the system is composed of the following figure 1.
The technical scheme of the invention is as follows:
(1) compared with the traditional fixed position equipment installation scheme, the system is higher in mobility and wider in application scene.
(2) The system integrates spectrum detection and radar detection, and is suitable for various working environments. If the frequency spectrum detection equipment cannot work normally when working in an electromagnetic signal complex area (transmitting base station), the target area can be monitored by searching a working mode through the radar detection equipment; if the system works in a micropower use area (petroleum and petrochemical), high-power equipment such as radar detection equipment and the like is not applicable any more, and monitoring of a target area can be realized through frequency spectrum detection equipment; if the target detection device works in a common protection area, the target is detected through the frequency spectrum detection device, the approximate azimuth information is provided, the radar is guided to search the azimuth, the search efficiency of the radar is improved, and meanwhile, the problem that the target detection is missed due to poor radar detection effect caused by shielding of buildings and the like is avoided.
(3) The system is provided with photoelectric equipment, target information is detected by the frequency spectrum detection equipment or the radar detection equipment, the photoelectric equipment is guided to search and track a target, a target image is returned through the photoelectric equipment, secondary confirmation is carried out on the target, and meanwhile target flight image data are collected for subsequent evidence proving.
(4) The detection system composed of multiple devices increases the adaptability and stability of the working environment of the system, and the multiple devices detect and confirm the target and then carry out interference striking treatment, thereby improving the reliability of the system, avoiding invalid target striking caused by target misjudgment and improving the working efficiency of the system.
(5) The radar detection equipment can be switched between a multi-target search mode and a single-target tracking mode, and can realize 360-degree omnibearing detection if the radar detection equipment works in the multi-target search mode; if the target tracking system works in the single-target tracking mode, the target position information with high frequency and high precision can be improved for the system, and data support is provided for the subsequent appointed point trapping function so as to generate a more accurate trapping instruction.
(6) The system interference equipment consists of suppression interference equipment and deception interference equipment, wherein the suppression interference equipment is high-power equipment, can suppress communication signals of a specified frequency band in a specified area and has two interference attack modes of return voyage and forced landing; the deception jamming equipment is low-power equipment, can generate deception information, carries out position deception on the unmanned aerial vehicle target, and has two interference attack modes of designated direction driving and forced landing. Multiple target hit means improve system target handling capability. If the unmanned aerial vehicle works in a navigation frequency band and is applied to more areas (airports), the trapping information sent by the trapping device can cause interference to other normal working devices, the interference suppression device can be independently used for suppressing interference to the target communication frequency band of the unmanned aerial vehicle, and the target striking is completed; if the unmanned aerial vehicle works in a micro-power use area (petroleum and petrochemical), high-power equipment such as a suppression interference device is not applicable any more, and interference striking of a target unmanned aerial vehicle target can be achieved by deceiving the interference device. If the device works in a common monitoring area, the device can be linked with two devices to strike a target at the same time, and the interference effect and striking efficiency are improved.
(7) A designated position trapping mode is designed, all devices of a linkage system work cooperatively, and the unmanned aerial vehicle target designated point trapping function is achieved. Providing target detection information and target image data through frequency spectrum detection equipment, radar detection equipment and photoelectric equipment; providing high-precision and high-frequency target position information through a single-target tracking mode of radar detection equipment; the communication between the unmanned aerial vehicle and the remote controller is cut off by pressing the jamming device, and the control of the unmanned aerial vehicle is taken over by cheating the jamming device; by resolving the current position and the decoy position of the unmanned aerial vehicle returned by the radar detection equipment, false GPS data is generated in real time and sent to the unmanned aerial vehicle by the decoy interference equipment, and the unmanned aerial vehicle is controlled to fly to a specified position; and after the unmanned aerial vehicle reaches the designated position, the unmanned aerial vehicle is switched to a forced landing mode, so that the unmanned aerial vehicle lands in situ, and the recovery of the unmanned aerial vehicle is completed.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention and not for limiting, and although the embodiments of the present invention are described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the embodiments of the present invention without departing from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A low-altitude rejection system for low-speed and small-flight targets, comprising: the system comprises frequency spectrum detection equipment, radar detection equipment, photoelectric equipment, interference suppression equipment, deception interference equipment, positioning and orientation equipment and a vehicle-mounted platform; the control center of the low-altitude rejection system interacts with radar detection equipment, frequency spectrum detection equipment, photoelectric equipment, interference suppression equipment and deception interference equipment through comprehensive control software, and controls any one of the frequency spectrum detection equipment, the radar detection equipment and the photoelectric equipment to carry out target detection independently or a plurality of detection equipment are combined to complete a target detection task; the control center issues control instructions to the interference suppression equipment and the deception interference equipment, controls generation and emission of interference signals and deception signals, and monitors working states of the interference suppression equipment and the deception interference equipment in real time; the low-altitude rejection system can search and find low-slow small targets flying in the protective area by using various detection devices, and performs target identification and striking on the found low-slow small flying targets.
2. The low-altitude rejection system according to claim 1, wherein the low-altitude rejection system detects the frequency spectrum information of the target through a frequency spectrum detection device, and identifies the model and flight orientation information of the detected target; and the frequency spectrum detection equipment transmits target position information back to the control center.
3. The system of claim 2, wherein the control center of the system directs the radar detection device to search for the target in the vicinity of the designated position according to the target position information provided by the spectrum detection device; when the radar detects the target, the photoelectric equipment is guided to search the target through the radar detection target position information, and secondary confirmation is carried out on the target according to real-time image information returned by the photoelectric equipment.
4. The low-altitude rejection system as claimed in claim 3, wherein the optoelectronic device of the low-altitude rejection system locks the target and automatically tracks the target after searching the target through an image processing algorithm, and meanwhile, the working mode of the radar detection device is switched from a search mode to a single-target tracking mode, so that target position information with higher precision and higher refresh rate is provided for the control center.
5. The system as claimed in claim 4, wherein the control center of the low-altitude rejection system determines that the detected target is approaching the defensive red line area, and activates the point-designated cheating system by the comprehensive control software to press the cheating and disturbing device and the cheating and disturbing device in parallel to disturb and attack the target.
6. The low-altitude rejection system according to claim 5, wherein said means for performing interference and attack on the target by said low-altitude rejection system includes but is not limited to: through a series of control strategies, the interference equipment and the deception interference equipment are pressed in a linkage mode to work in a cooperative mode, communication between the unmanned aerial vehicle and a remote controller of the unmanned aerial vehicle is cut off, the deception interference equipment takes over control over the unmanned aerial vehicle, a control center calculates the current position of the unmanned aerial vehicle and sets a designated deception position, deception GPS information is generated in real time and sent to the unmanned aerial vehicle, the unmanned aerial vehicle is controlled to fly to the designated deception position, the unmanned aerial vehicle turns into a forced landing mode after reaching the designated deception position, the unmanned aerial vehicle lands in situ, and recovery of the unmanned aerial.
7. A designated point inducement method for low slow and small flying targets based on a low-altitude rejection system according to any one of claims 1-7, characterized in that the method comprises the following steps:
step 1, a control center of the low-altitude rejection system controls radar detection equipment to track a low-speed small flying target discovered by frequency spectrum detection equipment, and returns real-time azimuth angle, pitch angle, speed and distance information of the tracked target to the control center;
step 2, the control center controls the rotation of the rotary tables of the interference suppression equipment and the deception jamming equipment according to the target azimuth angle and the target pitch angle of the low-slow small-flight target detected by the radar, so that the interference suppression equipment and the deception jamming equipment are aligned to the target;
step 3, the control center controls to open the deception jamming equipment, sets the transmitting power value of the deception jamming equipment according to the distance between the flying target and the low-altitude rejection system, sends a suppression jamming signal and cuts off a path between the flying target and the satellite signal;
step 4, simultaneously, the control center deceives the interference equipment to generate false GPS information to decoy the unmanned aerial vehicle;
step 5, opening interference suppression equipment, suppressing a control signal of the remote controller of the unmanned aerial vehicle, avoiding the cheating failure caused by reconnection of the unmanned aerial vehicle and the remote controller thereof, and enabling the unmanned aerial vehicle to be always under the control of the cheating interference equipment;
and 6, after the flying target approaches or reaches the trapping destination position, the deception jamming equipment starts a forced landing function, sends the GPS coordinates of the landing area to the flying target, controls the flying target to automatically land, and controls the deception jamming equipment to continuously interfere with the target until the target lands.
8. The specified point inducement method according to claim 7, wherein said step 4 comprises the sub-steps of:
step 4.1, the control center receives the flying target returned by the radar detection equipment in real time and generates position information of a position where the flying target is tricked into;
and 4.2, calculating the relative distance and the direction between the real-time position of the flying target and the decoy position by the control center, resolving the direction information of the decoy control, generating a group of false GPS data, sending the false GPS data to the target unmanned aerial vehicle by the decoy interference equipment, and executing the function of directing the decoy.
9. The specified-point inducement method according to claim 8, wherein the real-time location information of the flight target returned by the radar detection device comprises: latitude and longitude, azimuth angle, pitch angle and distance.
10. The specified point induction method according to claim 7, wherein said step 5 of opening the jamming device and the operation of cheating jamming are alternately repeated to prevent the unmanned aerial vehicle from reestablishing connection communication with its remote controller to cause the cheating jamming to fail.
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