CN115143841B - Multi-system combined unmanned aerial vehicle countering system and method - Google Patents
Multi-system combined unmanned aerial vehicle countering system and method Download PDFInfo
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- CN115143841B CN115143841B CN202210539622.6A CN202210539622A CN115143841B CN 115143841 B CN115143841 B CN 115143841B CN 202210539622 A CN202210539622 A CN 202210539622A CN 115143841 B CN115143841 B CN 115143841B
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Abstract
The invention discloses a multi-system combined unmanned aerial vehicle countering system and a method, wherein the system comprises a radio detection subsystem, a buffer area and a control unit, wherein the radio detection subsystem is used for detecting whether a strange unmanned aerial vehicle exists in the buffer area, and the strange unmanned aerial vehicle is taken as a target unmanned aerial vehicle; the photoelectric tracking subsystem is used for acquiring the position of the target unmanned aerial vehicle, tracking the target unmanned aerial vehicle, and carrying out early warning if the position of the target unmanned aerial vehicle is in a preset dangerous area; the electromagnetic interference subsystem is used for detecting electromagnetic information of the target unmanned aerial vehicle and external electromagnetic interference information within a preset distance around the electromagnetic information, acquiring an interference threshold value based on the electromagnetic information and the external electromagnetic interference information, and formulating a preset strategy according to the relation between the electromagnetic information and the interference threshold value so as to interfere the target unmanned aerial vehicle; and the satellite navigation decoy subsystem is used for inducing the target unmanned aerial vehicle to a safe position according to the laser track. The unmanned aerial vehicle flight trajectory can be accurately tracked, and the problem of wrong striking or striking falling is avoided.
Description
Technical Field
The application relates to the technical field of unmanned aerial vehicle countering, in particular to a multi-system combined unmanned aerial vehicle countering system and method.
Background
At present, the technical means of the unmanned aerial vehicle at home and abroad show diversified development trends, and the unmanned aerial vehicle can be mainly divided into two major categories of physical knockdown and electromagnetic interference. Physical knockdown is one of the conventional disposal methods at present, mainly adopts the means such as net gun, artillery or high-energy laser burnout to dispose unmanned aerial vehicle, and this kind of method cost is higher, and the unmanned aerial vehicle that falls if carry dangerous goods, can produce more severe secondary hazard. The electromagnetic interference mainly forces the unmanned aerial vehicle to return to voyage, hover or land in situ by cutting off or pressing the unmanned aerial vehicle control, positioning and image transmission signals, the method is technically easy to realize and has relatively low cost, but the unmanned aerial vehicle is always in a flying and moving state, the positioning of the unmanned aerial vehicle is inaccurate, and the electromagnetic interference of the surrounding environment is added, so that the electromagnetic striking of the unmanned aerial vehicle is inaccurate, and the condition that the striking falls down or is wrong often occurs.
Therefore, how to avoid the electromagnetic interference of the surrounding environment and improve the interference precision to the unmanned aerial vehicle is a technical problem to be solved at present.
Disclosure of Invention
The invention provides a multi-system combined unmanned aerial vehicle countering system, which is used for solving the technical problems of high interference of surrounding environment and low accuracy of striking an unmanned aerial vehicle in the prior art.
The system comprises:
the radio detection subsystem is used for detecting whether a strange unmanned aerial vehicle exists in the buffer area or not, and taking the strange unmanned aerial vehicle as a target unmanned aerial vehicle;
the photoelectric tracking subsystem is used for emitting laser to the target unmanned aerial vehicle, acquiring the position of the target unmanned aerial vehicle, tracking the target unmanned aerial vehicle through a laser track, and carrying out early warning if the position of the target unmanned aerial vehicle is in a preset dangerous area;
the electromagnetic interference subsystem is used for detecting electromagnetic information of the target unmanned aerial vehicle and external electromagnetic interference information within a preset distance around the electromagnetic information, acquiring an interference threshold value based on the electromagnetic information and the external electromagnetic interference information, and formulating a preset strategy according to the relation between the electromagnetic information and the interference threshold value so as to interfere the target unmanned aerial vehicle;
the satellite navigation decoy subsystem is used for inducing the target unmanned aerial vehicle to a safe position according to the laser track;
the interference threshold comprises an interference upper limit value and an interference lower limit value, and the preset dangerous area is located in the buffer area.
In some embodiments of the present application, the photoelectric tracking subsystem includes:
the tracking module is used for transmitting laser pulses to the target unmanned aerial vehicle, the laser pulses comprise first laser and second laser, and the target unmanned aerial vehicle is continuously and dynamically tracked through the second laser, so that a laser track is formed;
the amplifying module is used for amplifying the received optical signals of part of scattered light;
the processing module is used for obtaining the position of the target unmanned aerial vehicle according to the time of the first laser emission and the scattered light reception;
and the early warning module is used for carrying out early warning if the target unmanned aerial vehicle is positioned in a preset dangerous area.
In some embodiments of the present application, the electromagnetic interference subsystem includes:
the detection module is used for detecting electromagnetic information of the target unmanned aerial vehicle and external electromagnetic interference information within a preset distance around the electromagnetic information, wherein the electromagnetic information comprises electromagnetic intensity, and the external electromagnetic interference information comprises external electromagnetic interference intensity; and obtaining an interference threshold according to the electromagnetic intensity and the external electromagnetic interference intensity.
In some embodiments of the present application, the satellite navigation spoofing subsystem includes:
the receiving module is used for receiving satellite signals of the target unmanned aerial vehicle;
the conversion module is used for generating a decoy navigation signal indistinguishable from the satellite signal according to the satellite signal and converting a radio frequency section of the decoy navigation signal into a radio frequency section of the pseudolite module;
and the pseudolite module is used for camouflaging the uplink signal and the downlink signal of the target unmanned aerial vehicle and is matched with the decoy navigation signal to enable the target unmanned aerial vehicle to fly to a safe position.
In some embodiments of the present application, the electromagnetic interference subsystem further includes:
the judging module is used for sending out a first strategy signal if the external electromagnetic interference intensity is lower than the interference lower limit value; if the external electromagnetic interference intensity is not lower than the interference lower limit value and the external electromagnetic interference intensity is lower than the interference upper limit value, a second strategy signal is sent out; and if the external electromagnetic interference intensity is not lower than the interference upper limit value, sending out a third strategy signal.
In some embodiments of the present application, the electromagnetic interference subsystem further comprises:
the interference module is used for receiving the first strategy signal and transmitting an interference signal to the target unmanned aerial vehicle according to the target unmanned aerial vehicle position; or receiving the second strategy signal, transmitting a counteracting signal to the preset distance around the target unmanned aerial vehicle by the interference module, counteracting the interference of the peripheral signal, and transmitting an interference signal to the target unmanned aerial vehicle according to the position of the target unmanned aerial vehicle; or receiving the third strategy signal until the target unmanned aerial vehicle flies to a position where an external electromagnetic signal is weak, and then transmitting an interference signal according to the position of the target unmanned aerial vehicle;
the position where the external electromagnetic signal is weaker is the position where the external electromagnetic interference intensity is not higher than the interference upper limit value.
Correspondingly, the application also provides a multi-system combined unmanned aerial vehicle countering method, which comprises the following steps:
detecting whether an strange unmanned aerial vehicle exists in the buffer area, and if so, taking the strange unmanned aerial vehicle as a target unmanned aerial vehicle;
transmitting laser pulses to the target unmanned aerial vehicle, wherein the laser pulses comprise first laser and second laser, the position of the target unmanned aerial vehicle is obtained through the first laser, the target unmanned aerial vehicle is continuously and dynamically tracked through the second laser, a laser track is formed, and if the position of the target unmanned aerial vehicle is in a preset dangerous area, early warning is carried out;
detecting electromagnetic information of the target unmanned aerial vehicle and external electromagnetic interference information within a preset distance around the electromagnetic information, wherein the electromagnetic information comprises electromagnetic intensity, the external electromagnetic interference information comprises external electromagnetic interference intensity, an interference threshold value is obtained according to the electromagnetic intensity and the external electromagnetic interference intensity, and a preset strategy is formulated for interference of the target unmanned aerial vehicle by comparing the external electromagnetic interference intensity with the interference threshold value;
the buffer area is located outside the protection area, and the interference threshold value comprises an interference upper limit value and an interference lower limit value.
In some embodiments of the present application, detecting whether a strange unmanned aerial vehicle exists in the buffer area is specifically:
detecting whether a new signal source exists in the buffer area or not based on a radio detection system, if so, confirming whether the new signal source is an strange unmanned aerial vehicle through a sky-eye camera device, and if so, taking the strange unmanned aerial vehicle as a target unmanned aerial vehicle;
and taking the confirmed safe unmanned aerial vehicle in the buffer area as a familiar unmanned aerial vehicle, establishing an unmanned aerial vehicle data storage library, matching the safe unmanned aerial vehicle with the unmanned aerial vehicle data storage library if the unmanned aerial vehicle is detected, and taking the unmanned aerial vehicle as a strange unmanned aerial vehicle if the matching fails.
In some embodiments of the present application, comparing the external electromagnetic interference intensity with the interference threshold value to make a preset policy to interfere with the target unmanned aerial vehicle, specifically includes:
if the external electromagnetic interference intensity is lower than the interference lower limit value, transmitting an interference signal to the target unmanned aerial vehicle according to the target unmanned aerial vehicle position;
if the external electromagnetic interference intensity is not lower than the interference lower limit value and the external electromagnetic interference intensity is lower than the interference upper limit value, transmitting a counteracting signal to the preset distance around the target unmanned aerial vehicle, counteracting the interference of peripheral signals, and transmitting an interference signal to the target unmanned aerial vehicle according to the position of the target unmanned aerial vehicle;
if the external electromagnetic interference intensity is not lower than the interference upper limit value, transmitting an interference signal or a cancellation signal according to the position of the target unmanned aerial vehicle until the target unmanned aerial vehicle flies to the position where the external electromagnetic signal is weak;
the position where the external electromagnetic signal is weaker is the position where the external electromagnetic interference intensity is not higher than the interference upper limit value.
In some embodiments of the present application, after interfering with the target drone, the method further includes:
receiving satellite signals of the target unmanned aerial vehicle, acquiring indiscriminate navigation signals based on the satellite signals of the target unmanned aerial vehicle, converting a radio frequency section of the decoy navigation signals into a radio frequency section identical to a pseudolite module, discharging the unmanned aerial vehicle on the my according to the laser track to follow the target unmanned aerial vehicle, wherein the pseudolite module is arranged on the unmanned aerial vehicle, and performing signal blinding on the target unmanned aerial vehicle by the pseudolite module so as to be matched with the decoy navigation signals, and inducing the target unmanned aerial vehicle to fly to a safe position;
wherein the secure location is within the buffer zone.
By applying the technical scheme, the system comprises a radio detection subsystem, a buffer area and a control subsystem, wherein the radio detection subsystem is used for detecting whether a strange unmanned aerial vehicle exists in the buffer area, and taking the strange unmanned aerial vehicle as a target unmanned aerial vehicle; the photoelectric tracking subsystem is used for emitting laser to the target unmanned aerial vehicle, acquiring the position of the target unmanned aerial vehicle, tracking the target unmanned aerial vehicle through a laser track, and carrying out early warning if the position of the target unmanned aerial vehicle is in a preset dangerous area; the electromagnetic interference subsystem is used for detecting electromagnetic information of the target unmanned aerial vehicle and external electromagnetic interference information within a preset distance around the electromagnetic information, acquiring an interference threshold value based on the electromagnetic information and the external electromagnetic interference information, and formulating a preset strategy according to the relation between the electromagnetic information and the interference threshold value so as to interfere the target unmanned aerial vehicle; and the satellite navigation decoy subsystem is used for inducing the target unmanned aerial vehicle to a safe position according to the laser track. The multiple systems can be networked, and the multiple systems can cooperatively work after networking, so that the protection area can be increased, the reliability of system defense is improved, and the system defense effect is improved. The unmanned aerial vehicle flight trajectory can be accurately tracked, and the problem of wrong striking or striking falling is avoided. By eliminating the interference of the peripheral signals of the target unmanned aerial vehicle, the unmanned aerial vehicle is accurately interfered, and further invasion of the unmanned aerial vehicle is stopped. The pilot safety of the protection area is improved, and accidents such as collision damage of the unmanned aerial vehicle and the like can not occur.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a schematic structural diagram of a multi-system combined unmanned aerial vehicle countering system according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a multi-system combined unmanned aerial vehicle countering method according to an embodiment of the invention;
FIG. 3 is a schematic diagram of an embodiment of an optoelectronic tracking subsystem;
FIG. 4 is a schematic diagram of an electromagnetic interference subsystem according to an embodiment of the present invention;
fig. 5 shows a schematic structural diagram of a satellite navigation spoofing subsystem in an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The embodiment of the application provides a multi-system combined unmanned aerial vehicle reaction system, as shown in fig. 1, the system comprises:
and the radio detection subsystem is used for detecting whether a strange unmanned aerial vehicle exists in the buffer area and taking the strange unmanned aerial vehicle as a target unmanned aerial vehicle.
In this embodiment, whether a new signal source exists in the buffer area is detected by radar or radio detection equipment, if the new signal source exists, whether the new signal source is an unmanned aerial vehicle is determined by a sky-eye camera device, and if yes, the strange unmanned aerial vehicle is used as a target unmanned aerial vehicle. Outside the protective area a buffer area is located, which must be passed through if an extraneous mobile object wants to reach the protective area. Signal detection in the buffer is primarily directed to ground and air.
It can be understood that the signal detection can be performed in a biased manner in the air or on the ground according to actual needs. For example, the detection of a signal of a flying object may be arranged to deflect the detection of an aerial signal. The radio detection system may include TDOA, AOA, TOA, etc., which are all within the scope of the present application.
And the photoelectric tracking subsystem is used for transmitting laser to the target unmanned aerial vehicle, acquiring the position of the target unmanned aerial vehicle, tracking the target unmanned aerial vehicle through a laser track, and carrying out early warning if the position of the target unmanned aerial vehicle is in a preset dangerous area.
In some embodiments of the present application, in order to improve the accuracy of acquiring the flight trajectory of the unmanned aerial vehicle, the photoelectric tracking subsystem includes a tracking module, an amplifying module, a processing module and an early warning module.
The tracking module is used for transmitting laser pulses to the target unmanned aerial vehicle, the laser pulses comprise first laser and second laser, and the target unmanned aerial vehicle is continuously and dynamically tracked through the second laser, so that a laser track is formed;
the amplifying module is used for amplifying the received optical signals of part of scattered light;
the processing module is used for obtaining the position of the target unmanned aerial vehicle according to the time of the first laser emission and the scattered light reception;
and the early warning module is used for carrying out early warning if the target unmanned aerial vehicle is positioned in a preset dangerous area.
Two laser pulses are adopted, the first laser irradiates the target unmanned aerial vehicle, the real-time position of the target unmanned aerial vehicle is obtained by collecting scattered light emitted by the first laser, the second laser continuously dynamically tracks the target unmanned aerial vehicle, and a laser track is formed, so that the target unmanned aerial vehicle is accurately positioned and tracked, and electromagnetic interference of external signals is avoided.
And the electromagnetic interference subsystem is used for detecting electromagnetic information of the target unmanned aerial vehicle and external electromagnetic interference information within a preset distance around the electromagnetic information, acquiring an interference threshold value based on the electromagnetic information and the external electromagnetic interference information, and formulating a preset strategy according to the relation between the electromagnetic information and the interference threshold value so as to interfere the target unmanned aerial vehicle.
In some embodiments of the present application, the electromagnetic interference subsystem includes a detection module, a determination module, and an interference module. The detection module is used for detecting electromagnetic information of the target unmanned aerial vehicle and external electromagnetic interference information within a preset distance around the electromagnetic information, wherein the electromagnetic information comprises electromagnetic intensity, and the external electromagnetic interference information comprises external electromagnetic interference intensity; and obtaining an interference threshold according to the electromagnetic intensity and the external electromagnetic interference intensity.
The judging module is used for sending out a first strategy signal if the external electromagnetic interference intensity is lower than the interference lower limit value; if the external electromagnetic interference intensity is not lower than the interference lower limit value and the external electromagnetic interference intensity is lower than the interference upper limit value, a second strategy signal is sent out; and if the external electromagnetic interference intensity is not lower than the interference upper limit value, sending out a third strategy signal.
The interference module is used for receiving the first strategy signal and transmitting an interference signal to the target unmanned aerial vehicle according to the target unmanned aerial vehicle position; or receiving the second strategy signal, transmitting a counteracting signal to the preset distance around the target unmanned aerial vehicle by the interference module, counteracting the interference of the peripheral signal, and transmitting an interference signal to the target unmanned aerial vehicle according to the position of the target unmanned aerial vehicle; or receiving the third strategy signal until the target unmanned aerial vehicle flies to a position where an external electromagnetic signal is weak, and then transmitting an interference signal according to the position of the target unmanned aerial vehicle; the position where the external electromagnetic signal is weaker is the position where the external electromagnetic interference intensity is not higher than the interference upper limit value.
In this embodiment, the detection module obtains electromagnetic information of the target unmanned aerial vehicle and external electromagnetic interference information of a peripheral preset distance, so as to obtain an interference threshold, the judgment module judges the relation between the interference threshold and the external electromagnetic interference intensity, and an adaptive preset strategy is formulated based on the judgment result. External electromagnetic interference is effectively counteracted, so that the interference signal emission is more accurate.
And the satellite navigation decoy subsystem is used for inducing the target unmanned aerial vehicle to a safe position according to the laser track.
In some embodiments of the present application, the satellite navigation spoofing subsystem includes a receiving module, a converting module, and a pseudolite module.
The receiving module is used for receiving satellite signals of the target unmanned aerial vehicle;
the conversion module is used for generating a decoy navigation signal indistinguishable from the satellite signal according to the satellite signal and converting a radio frequency section of the decoy navigation signal into a radio frequency section of the pseudolite module;
and the pseudolite module is used for camouflaging the uplink signal and the downlink signal of the target unmanned aerial vehicle and is matched with the decoy navigation signal to enable the target unmanned aerial vehicle to fly to a safe position.
In this embodiment, the unmanned aerial vehicle is dispatched, the unmanned aerial vehicle is provided with the pseudolite module, the unmanned aerial vehicle follows the unmanned aerial vehicle, and the unmanned aerial vehicle keeps the position above the unmanned aerial vehicle all the time, so as to disguise the uplink signal and the downlink signal of the unmanned aerial vehicle, make the flying hand of the unmanned aerial vehicle unable to control the unmanned aerial vehicle, cut off the flying hand control communication, and cooperate with the decoy navigation signal to make the unmanned aerial vehicle fly to the safe position.
Those skilled in the art will appreciate that the modules in the system in the implementation scenario may be distributed in the system in the implementation scenario according to the implementation scenario description, or that corresponding changes may be located in one or more systems different from the implementation scenario. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
By applying the technical scheme, the system comprises a radio detection subsystem, a buffer area and a control subsystem, wherein the radio detection subsystem is used for detecting whether a strange unmanned aerial vehicle exists in the buffer area, and taking the strange unmanned aerial vehicle as a target unmanned aerial vehicle; the photoelectric tracking subsystem is used for emitting laser to the target unmanned aerial vehicle, acquiring the position of the target unmanned aerial vehicle, tracking the target unmanned aerial vehicle through a laser track, and carrying out early warning if the position of the target unmanned aerial vehicle is in a preset dangerous area; the electromagnetic interference subsystem is used for detecting electromagnetic information of the target unmanned aerial vehicle and external electromagnetic interference information within a preset distance around the electromagnetic information, acquiring an interference threshold value based on the electromagnetic information and the external electromagnetic interference information, and formulating a preset strategy according to the relation between the electromagnetic information and the interference threshold value so as to interfere the target unmanned aerial vehicle; and the satellite navigation decoy subsystem is used for inducing the target unmanned aerial vehicle to a safe position according to the laser track. The multiple systems can be networked, and the multiple systems can cooperatively work after networking, so that the protection area can be increased, the reliability of system defense is improved, and the system defense effect is improved. The unmanned aerial vehicle flight trajectory can be accurately tracked, and the problem of wrong striking or striking falling is avoided. By eliminating the interference of the peripheral signals of the target unmanned aerial vehicle, the unmanned aerial vehicle is accurately interfered, and further invasion of the unmanned aerial vehicle is stopped. The pilot safety of the protection area is improved, and accidents such as collision damage of the unmanned aerial vehicle and the like can not occur.
Correspondingly, the invention also provides a multi-system combined unmanned aerial vehicle countering method, as shown in fig. 2, which comprises the following steps:
step S101, detecting whether an strange unmanned aerial vehicle exists in the buffer area, and if so, taking the strange unmanned aerial vehicle as a target unmanned aerial vehicle.
Step S102, laser pulses are emitted to the target unmanned aerial vehicle, the laser pulses comprise first laser and second laser, the position of the target unmanned aerial vehicle is obtained through the first laser, the target unmanned aerial vehicle is continuously and dynamically tracked through the second laser, a laser track is formed, and if the position of the target unmanned aerial vehicle is in a preset dangerous area, early warning is carried out.
Step S103, detecting electromagnetic information of the target unmanned aerial vehicle and external electromagnetic interference information within a preset distance around the electromagnetic information, wherein the electromagnetic information comprises electromagnetic intensity, the external electromagnetic interference information comprises external electromagnetic interference intensity, an interference threshold is obtained according to the electromagnetic intensity and the external electromagnetic interference intensity, and a preset strategy is formulated for comparing the external electromagnetic interference intensity and the interference threshold to interfere the target unmanned aerial vehicle.
In step S101, in some embodiments of the present application, based on the detection of whether a new signal source exists in the buffer area by the radio detection system, if so, determining whether the new signal source is a strange unmanned aerial vehicle by the sky-eye camera device, and if so, taking the strange unmanned aerial vehicle as a target unmanned aerial vehicle;
in this embodiment, the confirmed safe unmanned aerial vehicle in the buffer area is used as a familiar unmanned aerial vehicle and an unmanned aerial vehicle data storage library is established, if the unmanned aerial vehicle is detected, the unmanned aerial vehicle is matched with the unmanned aerial vehicle data storage library, and if the matching fails, the unmanned aerial vehicle is used as a strange unmanned aerial vehicle.
Step S102, in some embodiments of the present application, a laser pulse is emitted to the target unmanned aerial vehicle, where the laser pulse includes a first laser and a second laser, the position of the target unmanned aerial vehicle is obtained by the first laser, the target unmanned aerial vehicle is continuously and dynamically tracked by the second laser, and a laser track is formed, and if the position of the target unmanned aerial vehicle is in a preset dangerous area, early warning is performed.
Step S103, in some embodiments of the present application, if the external electromagnetic interference strength is lower than the interference lower limit value, transmitting an interference signal to the target unmanned aerial vehicle according to the target unmanned aerial vehicle position; if the external electromagnetic interference intensity is not lower than the interference lower limit value and the external electromagnetic interference intensity is lower than the interference upper limit value, transmitting a counteracting signal to the preset distance around the target unmanned aerial vehicle, counteracting the interference of peripheral signals, and transmitting an interference signal to the target unmanned aerial vehicle according to the position of the target unmanned aerial vehicle; if the external electromagnetic interference intensity is not lower than the interference upper limit value, transmitting an interference signal or a cancellation signal according to the position of the target unmanned aerial vehicle until the target unmanned aerial vehicle flies to the position where the external electromagnetic signal is weak; the position where the external electromagnetic signal is weaker is the position where the external electromagnetic interference intensity is not higher than the interference upper limit value.
In addition, in order to avoid the danger to the rest of the area after the target unmanned aerial vehicle is interfered, the method further includes step S104, after the target unmanned aerial vehicle is interfered, the method further includes:
receiving satellite signals of the target unmanned aerial vehicle, acquiring indiscriminate navigation signals based on the satellite signals of the target unmanned aerial vehicle, converting a radio frequency section of the decoy navigation signals into a radio frequency section identical to a pseudolite module, discharging the unmanned aerial vehicle on the my according to the laser track to follow the target unmanned aerial vehicle, wherein the pseudolite module is arranged on the unmanned aerial vehicle, and performing signal blinding on the target unmanned aerial vehicle by the pseudolite module so as to be matched with the decoy navigation signals, and inducing the target unmanned aerial vehicle to fly to a safe position; wherein the secure location is within the buffer zone.
In this embodiment, the unmanned aerial vehicle is dispatched, the unmanned aerial vehicle is provided with a pseudolite module, the unmanned aerial vehicle follows the unmanned aerial vehicle, and the unmanned aerial vehicle always keeps the position above the unmanned aerial vehicle, so as to disguise the uplink signal and the downlink signal of the unmanned aerial vehicle, make the flying hand of the unmanned aerial vehicle unable to control the unmanned aerial vehicle, cut off the flying hand control communication, and cooperate with the decoy navigation signal to make the unmanned aerial vehicle fly to a safe position
There are also alternatives to the present application that also achieve the technical effects achieved by the present application.
The tracking module in the photoelectric tracking subsystem can adopt a laser diode, and the amplifying module can adopt an avalanche photodiode. Laser diode (for directing a laser pulse at a target, after reflection by the target, the laser light is scattered in all directions, part of the scattered light is returned to the sensor receiver, and is imaged onto an avalanche photodiode after being received by an optical system), avalanche diode (avalanche photodiode is an optical sensor having an amplifying function inside, so that it can detect extremely weak light signals).
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, one of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (6)
1. A multi-system combined unmanned aerial vehicle countering system, comprising:
the radio detection subsystem is used for detecting whether a strange unmanned aerial vehicle exists in the buffer area or not, and taking the strange unmanned aerial vehicle as a target unmanned aerial vehicle;
the photoelectric tracking subsystem is used for emitting laser to the target unmanned aerial vehicle, acquiring the position of the target unmanned aerial vehicle, tracking the target unmanned aerial vehicle through a laser track, and carrying out early warning if the position of the target unmanned aerial vehicle is in a preset dangerous area;
the electromagnetic interference subsystem is used for detecting electromagnetic information of the target unmanned aerial vehicle and external electromagnetic interference information within a preset distance around the electromagnetic information, acquiring an interference threshold value based on the electromagnetic information and the external electromagnetic interference information, and formulating a preset strategy according to the relation between the electromagnetic information and the interference threshold value so as to interfere the target unmanned aerial vehicle;
the electromagnetic interference subsystem includes:
the detection module is used for detecting electromagnetic information of the target unmanned aerial vehicle and external electromagnetic interference information within a preset distance around the electromagnetic information, wherein the electromagnetic information comprises electromagnetic intensity, and the external electromagnetic interference information comprises external electromagnetic interference intensity; obtaining an interference threshold according to the electromagnetic intensity and the external electromagnetic interference intensity; the interference threshold comprises an interference upper limit value and an interference lower limit value, and the preset dangerous area is located in the buffer area;
the electromagnetic interference subsystem further comprises:
the judging module is used for sending out a first strategy signal if the external electromagnetic interference intensity is lower than the interference lower limit value; if the external electromagnetic interference intensity is not lower than the interference lower limit value and the external electromagnetic interference intensity is lower than the interference upper limit value, a second strategy signal is sent out; if the external electromagnetic interference intensity is not lower than the interference upper limit value, a third strategy signal is sent out;
the electromagnetic interference subsystem further comprises:
the interference module is used for receiving the first strategy signal and transmitting an interference signal to the target unmanned aerial vehicle according to the position of the target unmanned aerial vehicle; or receiving the second strategy signal, transmitting a counteracting signal to the preset distance around the target unmanned aerial vehicle by the interference module, counteracting the interference of the peripheral signal, and transmitting an interference signal to the target unmanned aerial vehicle according to the position of the target unmanned aerial vehicle; or receiving the third strategy signal until the target unmanned aerial vehicle flies to a position where an external electromagnetic signal is weak, and then transmitting an interference signal according to the position of the target unmanned aerial vehicle;
the position where the external electromagnetic signal is weaker is the position where the external electromagnetic interference strength is not higher than the interference upper limit value;
and the satellite navigation decoy subsystem is used for inducing the target unmanned aerial vehicle to a safe position according to the laser track.
2. The system of claim 1, wherein the optoelectronic tracking subsystem comprises:
the tracking module is used for transmitting laser pulses to the target unmanned aerial vehicle, the laser pulses comprise first laser and second laser, and the target unmanned aerial vehicle is continuously and dynamically tracked through the second laser, so that a laser track is formed;
the amplifying module is used for amplifying the received optical signals of part of scattered light;
the processing module is used for obtaining the position of the target unmanned aerial vehicle according to the time of the first laser emission and the scattered light reception;
and the early warning module is used for carrying out early warning if the target unmanned aerial vehicle is positioned in a preset dangerous area.
3. The system of claim 1, wherein the satellite navigation spoofing subsystem comprises:
the receiving module is used for receiving satellite signals of the target unmanned aerial vehicle;
the conversion module is used for generating a decoy navigation signal indistinguishable from the satellite signal according to the satellite signal and converting a radio frequency section of the decoy navigation signal into a radio frequency section of the pseudolite module;
and the pseudolite module is used for camouflaging the uplink signal and the downlink signal of the target unmanned aerial vehicle and is matched with the decoy navigation signal to enable the target unmanned aerial vehicle to fly to a safe position.
4. A multi-system combined unmanned aerial vehicle countering method, comprising:
detecting whether an strange unmanned aerial vehicle exists in the buffer area, and if so, taking the strange unmanned aerial vehicle as a target unmanned aerial vehicle;
transmitting laser pulses to the target unmanned aerial vehicle, wherein the laser pulses comprise first laser and second laser, the position of the target unmanned aerial vehicle is obtained through the first laser, the target unmanned aerial vehicle is continuously and dynamically tracked through the second laser, a laser track is formed, and if the position of the target unmanned aerial vehicle is in a preset dangerous area, early warning is carried out;
detecting electromagnetic information of the target unmanned aerial vehicle and external electromagnetic interference information within a preset distance around the electromagnetic information, wherein the electromagnetic information comprises electromagnetic intensity, the external electromagnetic interference information comprises external electromagnetic interference intensity, an interference threshold value is obtained according to the electromagnetic intensity and the external electromagnetic interference intensity, a preset strategy is formulated for interference of the target unmanned aerial vehicle by comparing the external electromagnetic interference intensity with the interference threshold value, and the buffer area is located outside a protection area, and the interference threshold value comprises an interference upper limit value and an interference lower limit value;
and comparing the external electromagnetic interference intensity with the interference threshold to make a preset strategy to interfere the target unmanned aerial vehicle, wherein the method specifically comprises the following steps:
if the external electromagnetic interference intensity is lower than the interference lower limit value, transmitting an interference signal to the target unmanned aerial vehicle according to the position of the target unmanned aerial vehicle;
if the external electromagnetic interference intensity is not lower than the interference lower limit value and the external electromagnetic interference intensity is lower than the interference upper limit value, transmitting a counteracting signal to the preset distance around the target unmanned aerial vehicle, counteracting the interference of the peripheral signal, and transmitting an interference signal to the target unmanned aerial vehicle according to the position of the target unmanned aerial vehicle;
if the external electromagnetic interference intensity is not lower than the interference upper limit value, transmitting an interference signal or a cancellation signal according to the position of the target unmanned aerial vehicle until the target unmanned aerial vehicle flies to the position where the external electromagnetic signal is weak;
the position where the external electromagnetic signal is weaker is the position where the external electromagnetic interference intensity is not higher than the interference upper limit value.
5. The method of claim 4, wherein detecting whether a strange drone is present in the buffer area comprises:
detecting whether a new signal source exists in the buffer area or not based on a radio detection system, if so, confirming whether the new signal source is an strange unmanned aerial vehicle through a sky-eye camera device, and if so, taking the strange unmanned aerial vehicle as a target unmanned aerial vehicle;
and taking the confirmed safe unmanned aerial vehicle in the buffer area as a familiar unmanned aerial vehicle, establishing an unmanned aerial vehicle data storage library, matching the safe unmanned aerial vehicle with the unmanned aerial vehicle data storage library if the unmanned aerial vehicle is detected, and taking the unmanned aerial vehicle as a strange unmanned aerial vehicle if the matching fails.
6. The method of claim 4, wherein after interfering with the target drone, the method further comprises:
receiving satellite signals of the target unmanned aerial vehicle, acquiring indiscriminate navigation signals based on the satellite signals of the target unmanned aerial vehicle, converting a radio frequency section of the decoy navigation signals into the same radio frequency section as a pseudolite module, dispatching out the unmanned aerial vehicle to follow the target unmanned aerial vehicle according to the laser track, arranging the pseudolite module on the unmanned aerial vehicle, and carrying out signal blinding on the target unmanned aerial vehicle by the pseudolite module so as to be matched with the decoy navigation signals, and inducing the target unmanned aerial vehicle to fly to a safe position;
wherein the secure location is within the buffer zone.
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