CN108037545B - Directional optical interference system for unmanned aerial vehicle - Google Patents
Directional optical interference system for unmanned aerial vehicle Download PDFInfo
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- CN108037545B CN108037545B CN201711321575.3A CN201711321575A CN108037545B CN 108037545 B CN108037545 B CN 108037545B CN 201711321575 A CN201711321575 A CN 201711321575A CN 108037545 B CN108037545 B CN 108037545B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V11/00—Prospecting or detecting by methods combining techniques covered by two or more of main groups G01V1/00 - G01V9/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/495—Counter-measures or counter-counter-measures using electronic or electro-optical means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
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Abstract
The invention discloses a directional optical interference system for an unmanned aerial vehicle, which comprises an unmanned aerial vehicle early warning identification device, an unmanned aerial vehicle positioning and locking device, a directional interference device, a control console and an energy device. The unmanned aerial vehicle interference method and the unmanned aerial vehicle interference system improve the unmanned aerial vehicle interference technology, realize directional optical interference on the unmanned aerial vehicle, and solve the problem that the information protection on a target area cannot be performed due to the fact that the current unmanned aerial vehicle interference method is single and cannot effectively perform optical interference on the invading unmanned aerial vehicle. Meanwhile, the invention carries out directional interference on the invading unmanned aerial vehicle and transmits the interference signal to the invading unmanned aerial vehicle in a directional way, thereby avoiding energy loss and optical pollution to the protected area and ensuring the normal operation of production and life in the protected area.
Description
Technical Field
The invention relates to the technical field of unmanned aerial vehicle interception, in particular to an unmanned aerial vehicle optical interference method and a related device.
Background
Whether used for military, commercial, agricultural, or home photography, the use of drones in various areas is growing explosively. The method is especially applied to the fields of aerial photography, environmental monitoring, power inspection, disaster relief, news reports, express logistics, remote sensing and surveying and the like. Meanwhile, famous enterprises in China, such as Xinjiang, zero degree, hundred degrees, Tencent, millet, Jingdong and the like, also step into the unmanned aerial vehicle industry in succession, even with expert prediction, as the price of the unmanned aerial vehicle is gradually reduced, the unmanned aerial vehicle can become a reality in the future. According to the prediction of experts, the market space of mass consumption unmanned aerial vehicles is 260 billion yuan RMB and the market space of professional fever unmanned aerial vehicles is 40 billion yuan RMB by 2020; the industry application market space is 815 billion yuan RMB, and the industry output value is more than one billion in 2020 on the whole.
Just in the quick development of unmanned aerial vehicle trade, the potential safety hazard problem is also more and more, because most unmanned aerial vehicle users have not received professional training, just in order to satisfy personal interest and do not have flight general knowledge, law and regulation consciousness, the phenomenon of illegal use unmanned aerial vehicle is rare often, has lawless persons even to utilize unmanned aerial vehicle to cause the threat for public privacy, property, life safety. However, at present, nationwide unmanned aerial vehicle manufacturing enterprises exceed 400 families, but the unmanned aerial vehicle safety defense is engaged in the phoenix feather bone, so that the development of the anti-unmanned aerial vehicle technology is imperative. At present, research in the field of anti-unmanned aerial vehicles at home and abroad mainly aims at the flight electromagnetic interference or the decoy of the unmanned aerial vehicles, and the anti-unmanned aerial vehicles mainly have four types, namely a blocking interference type, a violent destruction type, a system control type and a physical capture type. The optical interference studies of drones are relatively rare.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a directional optical interference system for an unmanned aerial vehicle, which adopts a multi-sensor information fusion technology to carry out early warning identification on the unmanned aerial vehicle, combines a laser radar ranging technology, a moving object positioning technology and a photoelectric interference technology, realizes monitoring and early warning on a target area, carries out positioning and locking on an invading unmanned aerial vehicle and realizes directional optical interference.
In order to achieve the purpose, the invention adopts the following technical scheme:
a directional optical interference system for an unmanned aerial vehicle comprises an unmanned aerial vehicle early warning identification device, an unmanned aerial vehicle positioning and locking device, a directional optical interference device and a console;
the unmanned aerial vehicle early warning identification device comprises a low-altitude early warning radar, an electromagnetic monitoring device, an acoustic identification device and an early warning device, wherein the low-altitude early warning radar, the electromagnetic monitoring device and the acoustic identification device are electrically connected with the early warning device;
the unmanned aerial vehicle positioning and locking device comprises a control unit, a support module and a plurality of laser ranging radars; the laser ranging radar is arranged on the supporting module and is electrically connected to the control unit; the control unit is in communication connection with the early warning device, the interference device driving unit, the laser ranging radar and the console;
the directional interference device comprises an interference device driving unit, an interference device supporting device and an optical signal transmitting device; the optical signal transmitting device is arranged on the interference device supporting device and is electrically connected with the interference device driving unit; the optical signal transmitting device and the interference driving unit are in communication connection with the console;
the control console comprises a communication module, a data processing module, a display module and an energy module, wherein the communication module is respectively in communication connection with the data processing module, the unmanned aerial vehicle early warning identification device, the unmanned aerial vehicle positioning and locking device and the directional optical interference device, and the energy module supplies power to the whole directional optical interference system; the data processing module is electrically connected to the display module.
The low-altitude early warning radar mainly comprises a radar transmitter, a signal antenna, a radar receiver, a signal processor and a radar controller, wherein the radar transmitter and the radar receiver are electrically connected to the signal antenna, the signal antenna is electrically connected to the signal processor, the signal processor is electrically connected to the radar controller, and the radar controller is in communication connection with the control console and the early warning device; the radar transmitter is mainly used for generating electromagnetic wave signals and transmitting the electromagnetic wave signals through the signal antenna, the radar receiver is used for receiving electromagnetic wave echo signals received through the signal antenna, the signal processor is used for suppressing clutter, the radar controller is used for conducting communication, data processed by the signal processor are transmitted to the control console and the early warning device, control commands of the control console are received, parameters of the radar transmitter are set, and the filtering mode of the signal processor is set.
It should be noted that the electromagnetic monitoring device includes a signal analyzer, a communicator and a plurality of electromagnetic signal sensors; the electromagnetic signal sensors are distributed in the target protection space in a dispersing way and are used for continuously monitoring electromagnetic signals of the protection space and transmitting the acquired electromagnetic signals back to the signal analyzer; the signal analyzer processes and analyzes the electromagnetic signals of the plurality of electromagnetic signal sensors by adopting a multi-sensor information fusion method and filters out clutter interference; the communicator is electrically connected with the signal analyzer and is used for communicating with the early warning device and the control console and transmitting information obtained by processing and analyzing through the signal analyzer to the early warning device.
The acoustic identification device comprises an acoustic sensor, a filter amplifier and an identification module which are distributed at a designated position, the acoustic sensor, the filter amplifier and the identification module are sequentially in communication connection, and the identification module is in communication connection with the early warning device and the console; the acoustic sensor is mainly used for monitoring acoustic signals of a target protection space; the filter amplifier is electrically connected to the acoustic sensor and is used for filtering out background clutter of the acoustic signal and amplifying a concerned wave frequency signal; the identification module is electrically connected with the filter amplifier and used for carrying out feature extraction on the received acoustic signals processed by the filter amplifier and comparing the acoustic signals with the acoustic features of the unmanned aerial vehicle stored at the cloud end, so that the unmanned aerial vehicle is identified and then the identification result is transmitted to the early warning device.
It should be noted that the early warning device is used for comprehensively analyzing data information transmitted by the low-altitude early warning radar, the electromagnetic monitoring equipment and the acoustic identification device so as to finally judge whether the unmanned aerial vehicle invades, and if the unmanned aerial vehicle invades, the early warning device sends early warning information to the control unit.
It should be noted that the laser ranging radar includes a laser transmitter, a laser receiver, and an information processing device;
the laser emitter comprises a laser, a laser power supply and an emitting optical system, laser emitted by the laser is emitted through the emitting optical system, the laser light source is electrically connected to the laser and provides power for the laser, and the laser is in communication connection with the control unit; the laser receives a control instruction of the control unit and emits laser under the control of the control instruction;
the laser receiver comprises a receiving optical system, an optical element and a photoelectric detector; the receiving optical system is used for converging the laser energy reflected by the invading unmanned aerial vehicle on the photoelectric detector; the photoelectric detector is used for converting an optical signal into an electric signal and transmitting the electric signal to the information processing device; the optical element comprises an optical filter and an attenuation sheet and is arranged between the receiving optical system and the photoelectric detector;
the information processing device is used for analyzing and processing the electric signals converted by the photoelectric detector in the laser receiver, so that the distance between the invading unmanned aerial vehicle and the current laser ranging radar is determined and sent to the control unit.
The driving unit of the jammer comprises an azimuth motor and an elevation motor, wherein the azimuth motor can control the jammer supporting device to rotate in 360 degrees in all directions; the elevation motor controls the interference device supporting device to adjust the elevation.
It should be noted that the supporting device of the jammer includes a supporting frame and an interface module; the supporting frame is used for supporting and protecting the optical signal transmitting device; the interface module comprises a power interface circuit and a communication interface circuit, wherein the power interface circuit is electrically connected with the energy module through a power supply system and is responsible for receiving energy provided by the energy module and supplying power to the directional interference device; the communication interface circuit is connected with the communication module and is responsible for data communication between the optical signal transmitting device and the console.
It should be noted that the optical signal emitting device includes an intense light source and an optical signal adjusting device; the strong light source generates a series of accurate coded pulses by adopting a modulation method, can emit strong interference optical signals, mainly comprises visible light and infrared light, and is used for interfering the camera of the unmanned aerial vehicle to shoot; the light signal adjusting device is connected with the strong light source and used for adjusting light signals emitted by the strong light source, adjusting the parallelism and the correlation of light, enabling the energy of the light signals to be emitted to an appointed direction in a concentrated mode, achieving directional interference on the invading unmanned aerial vehicle and reducing light energy loss.
The method for performing the directional optical interference of the unmanned aerial vehicle by using the directional optical interference system for the unmanned aerial vehicle comprises the following steps:
s1, arranging the electromagnetic monitoring equipment, the acoustic identification device and the low-altitude early warning radar to set positions, ensuring that the monitoring range covers the whole target protection space, and placing the laser ranging radar to a specified position; starting a system and carrying out initialization setting; the electromagnetic monitoring equipment memorizes the electromagnetic environment of the target protection space and monitors the electromagnetic signal of the target protection space;
s2, the electromagnetic monitoring equipment and the acoustic identification device start to enter a normal working state, and the low-altitude early warning radar starts to carry out full-view cruise monitoring on the target protection space; when the suspicious object is found to fly into the target protection space, the following steps are carried out: the electromagnetic monitoring equipment monitors that abnormal electromagnetic signals break into a target protection space and are in a frequency band of the control signals of the unmanned aerial vehicle; the low-altitude early warning radar monitors that a suspicious target breaks into a target protection space, and monitors that physical parameters of the suspicious target conform to the characteristics of the size, the dimension and the navigational speed of the unmanned aerial vehicle; the method comprises the following steps that an acoustic identification device detects that an acoustic signal breaks into a flight noise frequency band of the unmanned aerial vehicle, the noise signal accords with the noise characteristic of the flight signal of the unmanned aerial vehicle through characteristic extraction, a low-altitude early warning radar, an electromagnetic monitoring device and the acoustic identification device transmit information to an early warning device, and the early warning device judges whether a suspicious target is the unmanned aerial vehicle or not through a multi-sensor information fusion method; if the suspicious target is not the unmanned aerial vehicle, the system continues to monitor; if the suspicious target is the unmanned aerial vehicle, entering the next step;
s3, the early warning device transmits the early warning information to the control unit, the control unit controls the laser ranging radar to start, the laser ranging radars at different positions respectively range the invading unmanned aerial vehicle, and the control unit calculates the absolute coordinates of the invading unmanned aerial vehicle according to the different distances from the laser ranging radar at the specified position to the invading unmanned aerial vehicle;
the S4 control unit sends the absolute coordinates of the invading unmanned aerial vehicle to the console and the interference device driving unit, the console controls the directional interference device of the unmanned aerial vehicle to be started, the interference device driving unit is started, and the optical signal transmitting device is driven to turn to the position of the invading unmanned aerial vehicle; after the unmanned aerial vehicle reaches a specified angle, the optical signal transmitting device is started to transmit a strong interference optical signal to the invading unmanned aerial vehicle to prevent the invading unmanned aerial vehicle from shooting by a camera, and the visible light part of the strong interference optical signal is mainly used for preventing the unmanned aerial vehicle from shooting in the daytime; the infrared part is mainly used for preventing the unmanned aerial vehicle from shooting at night;
s5 when the invading unmanned aerial vehicle is intercepted or evacuated from the protected airspace, the directional optical interference device of the unmanned aerial vehicle automatically returns to the initial position, the optical signal emitting device is closed, and the system enters the early warning monitoring state again until the equipment is closed or the invading unmanned aerial vehicle is discovered again.
Compared with the prior art, the invention has the beneficial effects that:
the invention improves the anti-unmanned aerial vehicle technology, realizes the directional optical interference on the unmanned aerial vehicle, and solves the problem that the information protection on the target area cannot be carried out due to the fact that the current unmanned aerial vehicle has single interference means and cannot effectively carry out the optical interference on the invading unmanned aerial vehicle. Through the early warning and the supervision to the low latitude target, reach and make the early warning to the invasion target, rethread laser ranging radar carries out the range finding location to the invasion target, utilizes laser rangefinder and multisensor information fusion technique, reaches and fixes a position the monitoring to invading unmanned aerial vehicle to reach the directional optical interference to invading unmanned aerial vehicle. The interference to the invading unmanned aerial vehicle is realized by transmitting the strong interference optical signal, the information safety of people is ensured, the interference signal is directionally transmitted to the invading unmanned aerial vehicle, the energy loss is avoided, the optical pollution is generated to a protected area, and the normal operation of production and life in the protected area is ensured.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a general flow chart of an implementation of the present invention;
FIG. 3 is a schematic diagram of the system start-up process of the present invention;
FIG. 4 is a schematic diagram of an early warning monitoring process according to the present invention;
fig. 5 is a schematic flow chart of positioning and locking and optical interference of the unmanned aerial vehicle according to the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and it should be noted that the following examples are provided to illustrate the detailed embodiments and specific operations based on the technical solutions of the present invention, but the scope of the present invention is not limited to the examples.
As shown in fig. 1, a directional optical jamming system for an unmanned aerial vehicle includes an unmanned aerial vehicle early warning identification device, an unmanned aerial vehicle positioning and locking device, a directional optical jamming device, and a console;
the unmanned aerial vehicle early warning identification device comprises a low-altitude early warning radar, an electromagnetic monitoring device, an acoustic identification device and an early warning device, wherein the low-altitude early warning radar, the electromagnetic monitoring device and the acoustic identification device are electrically connected with the early warning device;
the unmanned aerial vehicle positioning and locking device comprises a control unit, a support module and a plurality of laser ranging radars; the laser ranging radar is arranged on the supporting module and is electrically connected to the control unit; the control unit is in communication connection with the early warning device, the interference device driving unit, the laser ranging radar and the console;
the directional interference device comprises an interference device driving unit, an interference device supporting device and an optical signal transmitting device; the optical signal transmitting device is arranged on the interference device supporting device and is electrically connected with the interference device driving unit; the optical signal transmitting device and the interference driving unit are in communication connection with the console;
the control console is in communication connection with the unmanned aerial vehicle early warning identification device, the unmanned aerial vehicle positioning and locking device and the directional optical interference device.
The control console comprises a communication module, a data processing module, a display module and an energy module, wherein the communication module is respectively in communication connection with the data processing module, the unmanned aerial vehicle early warning identification device, the unmanned aerial vehicle positioning and locking device and the directional optical interference device, and the energy module supplies power to the whole directional optical interference system; the data processing module is electrically connected to the display module.
It should be noted that the low-altitude early warning radar mainly comprises a radar transmitter, a signal antenna, a radar receiver, a signal processor and a radar controller, wherein the radar transmitter and the radar receiver are both electrically connected to the signal antenna, the signal antenna is electrically connected to the signal processor, the signal processor is electrically connected to the radar controller, and the radar controller is in communication connection with the control console and the early warning device. The radar transmitter is mainly used for generating electromagnetic wave signals and transmitting the electromagnetic wave signals through the signal antenna. The radar receiver is used for receiving electromagnetic wave echo signals received by the signal antenna. The signal processor adopts various filtering modes and is used for inhibiting clutter and ensuring the accuracy and effectiveness of the low-altitude early warning radar. The radar controller is used for communicating, transmitting data processed by the signal processor to the console and the early warning device, receiving a control command of the console, setting parameters such as a transmitting frequency band and power of the radar transmitter and setting a filtering mode of the signal processor.
It should be noted that the electromagnetic monitoring device includes a signal analyzer, a communicator and a plurality of electromagnetic signal sensors; the electromagnetic signal sensors are distributed in the target protection space in a dispersing way and are used for continuously monitoring electromagnetic signals of the protection space and transmitting the acquired electromagnetic signals back to the signal analyzer; the signal analyzer processes and analyzes the electromagnetic signals of the plurality of electromagnetic signal sensors by adopting a multi-sensor information fusion method and filters out clutter interference; the communicator is electrically connected with the signal analyzer and is used for communicating with the early warning device and the control console, transmitting information obtained through processing and analysis of the signal analyzer to the early warning device, and receiving a control instruction of the control console to set parameters.
The acoustic identification device comprises an acoustic sensor, a filter amplifier and an identification module which are distributed at a designated position, wherein the acoustic sensor, the filter amplifier and the identification module are sequentially connected in a communication manner, and the identification module is connected with the early warning device and the console in a communication manner; the acoustic sensor is high in sensitivity and wide in identification frequency domain, and is mainly used for monitoring acoustic signals of a target protection space; the filter amplifier is electrically connected to the acoustic sensor and is used for filtering out background clutter of the acoustic signal and amplifying a concerned wave frequency signal; the identification module is electrically connected with the filter amplifier and used for carrying out feature extraction on the received acoustic signals processed by the filter amplifier and comparing the acoustic signals with the acoustic features of the unmanned aerial vehicle stored in the cloud, so that the unmanned aerial vehicle is identified, then the identification result is transmitted to the early warning device, and the control instruction of the control console is received to set parameters.
It should be noted that the early warning device is used for carrying out comprehensive analysis on data information transmitted by the low-altitude early warning radar, the electromagnetic monitoring equipment and the acoustic identification device so as to finally judge whether the unmanned aerial vehicle invades, if the unmanned aerial vehicle invades, the early warning device sends early warning information to the control unit, and if the unmanned aerial vehicle invades, the monitoring is continued.
It should be noted that the laser ranging radar includes a laser transmitter, a laser receiver, and an information processing device;
the laser emitter comprises a laser, a laser power supply and an emitting optical system, laser emitted by the laser is emitted through the emitting optical system, the laser light source is electrically connected with the laser and provides power for the laser, and the laser is in communication connection with the control unit. The laser adopts a near-infrared light source, has small divergence angle, narrower beam, more concentrated energy and better coherence. The laser power supply is used for supplying power to the laser, has large output current and stable power, and can meet the energy requirement of the laser. The laser receives the control instruction of the control unit and emits laser under the control of the control unit.
The laser receiver comprises a receiving optical system, an optical element and a photoelectric detector. The receiving optical system is used for converging laser energy reflected by the invading unmanned aerial vehicle on the photoelectric detector, properly limits a receiving view field, reduces the interference of stray light, improves the receiving sensitivity and the signal to noise ratio, and improves the ranging precision and the working distance of the ranging system. The photoelectric detector is used for converting the optical signal into an electric signal and transmitting the electric signal to the information processing device. The optical element comprises an optical filter and an attenuation sheet, is arranged between the receiving optical system and the photoelectric detector, and is used for improving the performance of the pulse laser ranging radar, increasing the working distance and enlarging the gain range.
The information processing device is used for analyzing and processing the electric signals converted by the photoelectric detector in the laser receiver, so that the distance between the invading unmanned aerial vehicle and the current laser ranging radar is determined and sent to the control unit.
It should be noted that, after the early warning device sends out the early warning information, the control unit transmits the early warning information to the console and the laser ranging radar; in addition, the control unit carries out analysis and calculation with the distance that laser range radar surveyed to reach unmanned aerial vehicle's absolute position coordinate, and pass to control cabinet and interference ware drive unit with unmanned aerial vehicle coordinate.
What need explain, the support module adopts stainless steel construction, and corrosion resisting property is good, adopts the anti-wind design, and the structure is more stable, changes the adverse weather of antagonism, reaches the protection support unmanned aerial vehicle positioning locking device's purpose.
The driving unit of the jammer comprises an azimuth motor and an elevation motor, wherein the azimuth motor can control the jammer supporting device to rotate in 360 degrees in all directions; the elevation motor controls the interference device supporting device to adjust the elevation. Through the interference unit drive unit can carry out directional interference to unmanned aerial vehicle.
The interference device supporting device comprises a supporting frame and an interface module; the supporting frame plays a role in supporting and protecting the optical signal transmitting device. The interface module includes a power interface circuit and a communication interface circuit. The power supply interface circuit is electrically connected with the energy module through a power supply system and is responsible for receiving energy provided by the energy module and supplying power to the interference device supporting device; the communication interface circuit is connected with the communication module and is responsible for data communication between the optical signal transmitting device and the console.
The optical signal transmitting device comprises an intense light source and an optical signal adjusting device. The strong light source uses a xenon lamp, a modulation method is used for generating a series of accurate coding pulses, strong interference optical signals can be emitted, and the main components are visible light and infrared light which are used for interfering the camera of the unmanned aerial vehicle to shoot; the light signal adjusting device is connected with the strong light source and used for adjusting light signals emitted by the strong light source, adjusting the parallelism and the correlation of light, enabling the energy of the light signals to be emitted to an appointed direction in a concentrated mode, achieving directional interference on the invading unmanned aerial vehicle and reducing light energy loss.
The communication module is in communication connection with the unmanned aerial vehicle early warning identification device, the unmanned aerial vehicle positioning and locking module and the directional optical interference device. The communication module comprises a plurality of optical fiber interfaces and can carry out rapid data communication.
The energy module comprises a power supply system and a lead storage battery. The power supply system is electrically connected with all the power utilization components in the directional optical interference system and converts 220V alternating voltage into direct voltage. The power supply system is small in size and good in reliability, adopts a double-tube forward framework, supports 180-240V wide power grid input, is good in heat dissipation performance, comprises a plurality of +12V and +5V voltage interfaces, and meets the requirement of supplying power to the system. The lead storage battery is electrically connected with the power supply system and can be used as an internal emergency energy source when an external power grid is in emergency situations such as power failure.
As shown in fig. 2-5, the method for directional optical jamming of a drone by using the directional optical jamming system for a drone includes the following steps:
s1, arranging the electromagnetic monitoring equipment, the acoustic identification device and the low-altitude early warning radar to a set position, ensuring that the monitoring range of the low-altitude early warning radar covers the whole target protection space, and placing the laser ranging radar to a specified position. And starting the system and carrying out initialization setting. The electromagnetic monitoring equipment memorizes the electromagnetic environment of the target protection space and monitors the electromagnetic signal of the target protection space.
S2 the electromagnetic monitoring equipment and the acoustic identification device start to enter a normal working state, and the low-altitude early warning radar starts to carry out full-view cruise monitoring on the target protection space. When the suspicious object is found to fly into the target protection space, the following steps are carried out: the electromagnetic monitoring equipment monitors that abnormal electromagnetic signals break into a target protection space and are in a frequency band of the control signals of the unmanned aerial vehicle; the low-altitude early warning radar monitors that a suspicious target breaks into a target protection space, and monitors that physical parameters of the suspicious target conform to the characteristics of the size, the dimension and the navigational speed of the unmanned aerial vehicle; the acoustic identification device detects that an acoustic signal breaks into an unmanned aerial vehicle flight noise frequency band, the noise signal accords with the unmanned aerial vehicle flight signal noise characteristics through characteristic extraction, the low-altitude early warning radar, the electromagnetic monitoring equipment and the acoustic identification device transmit information into the early warning device, and the early warning device judges whether a suspicious target is the unmanned aerial vehicle through a multi-sensor information fusion method. If the suspicious target is not the unmanned aerial vehicle, the system continues to monitor; and if the suspicious target is the unmanned aerial vehicle, entering the next step.
S3 early warning ware passes early warning information to the control unit, and the control unit control laser range radar opens, and the laser range radar that is in different positions carries out the range finding to invading unmanned aerial vehicle respectively, and the control unit calculates invading unmanned aerial vehicle' S absolute coordinate according to the different distances of the laser range radar distance invading unmanned aerial vehicle that is in the assigned position.
The S4 control unit sends the absolute coordinates of the invading unmanned aerial vehicle to the console and the interference unit driving unit, the console controls the directional interference device of the unmanned aerial vehicle to be started, the interference unit driving unit is started, and the optical signal transmitting device is driven to turn to the position of the invading unmanned aerial vehicle. After the unmanned aerial vehicle reaches a specified angle, the optical signal transmitting device is started to transmit a strong interference optical signal to the invading unmanned aerial vehicle to prevent the invading unmanned aerial vehicle from shooting by a camera, and the visible light part of the strong interference optical signal is mainly used for preventing the unmanned aerial vehicle from shooting in the daytime; the infrared part is mainly used for preventing the unmanned aerial vehicle from shooting at night.
S5 when the invading unmanned aerial vehicle is intercepted or evacuated from the protected airspace, the directional optical interference device of the unmanned aerial vehicle automatically returns to the initial position, the optical signal emitting device is closed, and the system enters the early warning monitoring state again until the equipment is closed or the invading unmanned aerial vehicle is discovered again.
Examples
(1) After the system is started, initialization is carried out, the establishment and the correction of a coordinate system are completed, and the electromagnetic environment of the target protected space is memorized. The unmanned aerial vehicle early warning recognition device begins to work.
(2) In the monitoring process of the unmanned aerial vehicle early warning identification device, suspicious flying objects appear in a target protection space discovered by a low-altitude early warning radar, unfamiliar electromagnetic signals appear in an electromagnetic environment discovered by electromagnetic monitoring equipment, and characteristic noise signals of the unmanned aerial vehicle are captured by an acoustic identification device. The early warning device fuses and analyzes the sensor information, judges that the invading object is an unmanned aerial vehicle and immediately sends out early warning signals to the console. The control cabinet receives the early warning signal, starts the laser ranging radar, and the laser ranging radar that is located the assigned position carries out the range finding to invading unmanned aerial vehicle respectively, and the controller obtains invading unmanned aerial vehicle's absolute coordinate and sends it to the control cabinet through calculating. And the console transmits the received absolute coordinates of the invading unmanned aerial vehicle to the directional optical interference device.
(3) Directional optical interference device turns to invasion unmanned aerial vehicle position, and optical signal emitter opens, and optical signal adjusting device is with interfering signal adjustment back, launches to invasion unmanned aerial vehicle position, disturbs invasion unmanned aerial vehicle.
(4) After the invading unmanned aerial vehicle is driven away, the system recovers to the initial state, and the unmanned aerial vehicle early warning identification device continues to monitor the protected airspace until suspicious flyers appear again or the system receives a closing instruction.
Along with the development of society, people pay more and more attention to the safety problem, and unmanned aerial vehicle utilizes its low latitude operation, and the advantage that the disguise is strong develops fastly, consequently anti-unmanned aerial vehicle receives people's more and more attention. The directional optical interference system and method for the unmanned aerial vehicle improve the anti-unmanned aerial vehicle technology, interfere the invading unmanned aerial vehicle by transmitting strong interference optical signals, and guarantee the information safety of people. Through the early warning and the supervision to the low latitude target, reach and make the early warning to the invasion target, rethread laser ranging radar carries out the range finding location to the invasion target, utilizes laser rangefinder and multisensor information fusion technique, reaches and fixes a position the monitoring to invading unmanned aerial vehicle to reach the directional optical interference to invading unmanned aerial vehicle.
Various corresponding changes and modifications can be made by those skilled in the art based on the above technical solutions and concepts, and all such changes and modifications should be included in the protection scope of the present invention.
Claims (6)
1. A directional optical interference system for an unmanned aerial vehicle is characterized by comprising an unmanned aerial vehicle early warning identification device, an unmanned aerial vehicle positioning and locking device, a directional optical interference device and a console;
the unmanned aerial vehicle early warning identification device comprises a low-altitude early warning radar, an electromagnetic monitoring device, an acoustic identification device and an early warning device, wherein the low-altitude early warning radar, the electromagnetic monitoring device and the acoustic identification device are electrically connected with the early warning device;
the unmanned aerial vehicle positioning and locking device comprises a control unit, a support module and a plurality of laser ranging radars; the laser ranging radar is arranged on the supporting module and is electrically connected to the control unit; the control unit is in communication connection with the early warning device, the interference device driving unit, the laser ranging radar and the console;
the directional optical interference device comprises an interference device driving unit, an interference device supporting device and an optical signal transmitting device; the optical signal transmitting device is arranged on the interference device supporting device and is electrically connected with the interference device driving unit; the optical signal transmitting device and the interference driving unit are in communication connection with the console;
the optical signal transmitting device comprises an intense light source and an optical signal adjusting device; the strong light source generates a series of accurate coded pulses by adopting a modulation method, can emit strong interference optical signals, mainly comprises visible light and infrared light, and is used for interfering the camera of the unmanned aerial vehicle to shoot; the optical signal adjusting device is connected to the strong light source and used for adjusting optical signals emitted by the strong light source, adjusting the parallelism and the correlation of light, enabling the energy of the light to be emitted to a specified direction in a concentrated mode, achieving directional interference on the invading unmanned aerial vehicle and reducing optical energy loss;
the control console comprises a communication module, a data processing module, a display module and an energy module, wherein the communication module is respectively in communication connection with the data processing module, the unmanned aerial vehicle early warning identification device, the unmanned aerial vehicle positioning and locking device and the directional optical interference device, and the energy module supplies power to the whole directional optical interference system; the data processing module is electrically connected with the display module;
the acoustic identification device comprises an acoustic sensor, a filter amplifier and an identification module which are distributed at a designated position, the acoustic sensor, the filter amplifier and the identification module are sequentially in communication connection, and the identification module is in communication connection with the early warning device and the console; the acoustic sensor is used for monitoring an acoustic signal of the target protection space; the filter amplifier is electrically connected to the acoustic sensor and is used for filtering out background clutter of the acoustic signal and amplifying a concerned wave frequency signal; the identification module is electrically connected to the filter amplifier and used for extracting the characteristics of the received acoustic signals processed by the filter amplifier, comparing the characteristics with the acoustic characteristics of the unmanned aerial vehicle stored at the cloud end, identifying the unmanned aerial vehicle and transmitting the identification result to the early warning device;
the early warning device is used for comprehensively analyzing data information transmitted by the low-altitude early warning radar, the electromagnetic monitoring equipment and the acoustic identification device so as to finally judge whether the unmanned aerial vehicle invades, and if the unmanned aerial vehicle invades, sending early warning information to the control unit;
the laser ranging radar comprises a laser transmitter, a laser receiver and an information processing device;
the laser emitter comprises a laser, a laser power supply and an emitting optical system, laser emitted by the laser is emitted through the emitting optical system, the laser light source is electrically connected to the laser and provides power for the laser, and the laser is in communication connection with the control unit; the laser receives a control instruction of the control unit and emits laser under the control of the control instruction;
the laser receiver comprises a receiving optical system, an optical element and a photoelectric detector; the receiving optical system is used for converging the laser energy reflected by the invading unmanned aerial vehicle on the photoelectric detector; the photoelectric detector is used for converting an optical signal into an electric signal and transmitting the electric signal to the information processing device; the optical element comprises an optical filter and an attenuation sheet and is arranged between the receiving optical system and the photoelectric detector;
the information processing device is used for analyzing and processing the electric signals converted by the photoelectric detector in the laser receiver, so that the distance between the invading unmanned aerial vehicle and the current laser ranging radar is determined and sent to the control unit.
2. A directional optical jamming system for unmanned aerial vehicles according to claim 1, wherein the low-altitude warning radar includes a radar transmitter, a signal antenna, a radar receiver, a signal processor and a radar controller, the radar transmitter and the radar receiver are both electrically connected to the signal antenna, the signal antenna is electrically connected to the signal processor, the signal processor is electrically connected to the radar controller, and the radar controller is communicatively connected to the console and the warning device; the radar transmitter is used for generating electromagnetic wave signals and transmitting the electromagnetic wave signals through the signal antenna, the radar receiver is used for receiving electromagnetic wave echo signals received through the signal antenna, the signal processor is used for suppressing clutter, the radar controller is used for conducting communication, data processed by the signal processor are transmitted to the control console and the early warning device, control commands of the control console are received, parameters of the radar transmitter are set, and the filtering mode of the signal processor is set.
3. A directional optical jamming system for unmanned aerial vehicles according to claim 1, wherein the electromagnetic monitoring device includes a signal analyzer, a communicator and a plurality of electromagnetic signal sensors; the electromagnetic signal sensors are distributed in the target protection space in a dispersing way and are used for continuously monitoring electromagnetic signals of the protection space and transmitting the acquired electromagnetic signals back to the signal analyzer; the signal analyzer processes and analyzes the electromagnetic signals of the plurality of electromagnetic signal sensors by adopting a multi-sensor information fusion method and filters out clutter interference; the communicator is electrically connected with the signal analyzer and is used for communicating with the early warning device and the control console and transmitting information obtained by processing and analyzing through the signal analyzer to the early warning device.
4. The directional optical disturbance system for unmanned aerial vehicles according to claim 1, wherein the disturbance drive unit comprises an azimuth motor and an elevation motor, the azimuth motor controlling the disturbance support device to perform 360 degree omni-directional rotation; the elevation motor controls the interference device supporting device to adjust the elevation.
5. The directional optical disturbance system for drones according to claim 1, characterized in that the disturber support device comprises a support frame and an interface module; the supporting frame is used for supporting and protecting the optical signal transmitting device; the interface module comprises a power interface circuit and a communication interface circuit, wherein the power interface circuit is electrically connected with the energy module through a power supply system and is responsible for receiving energy provided by the energy module and supplying power to the directional optical interference device; the communication interface circuit is connected with the communication module and is responsible for data communication between the optical signal transmitting device and the console.
6. Method for directional optical jamming of drones, using a directional optical jamming system for drones according to any of the preceding claims, characterized in that it comprises the following steps:
s1: arranging the electromagnetic monitoring equipment, the acoustic identification device and the low-altitude early warning radar to set positions, ensuring that the monitoring range of the low-altitude early warning radar covers the whole target protection space, and placing the laser ranging radar to a specified position; starting a system and carrying out initialization setting;
the electromagnetic monitoring equipment memorizes the electromagnetic environment of the target protection space and monitors the electromagnetic signal of the target protection space;
s2: the electromagnetic monitoring equipment and the acoustic identification device start to enter a normal working state, and the low-altitude early warning radar starts to carry out full-view cruise monitoring on a target protection space; when the suspicious object is found to fly into the target protection space, the following steps are carried out: the electromagnetic monitoring equipment monitors that abnormal electromagnetic signals break into a target protection space and are in a frequency band of the control signals of the unmanned aerial vehicle; the low-altitude early warning radar monitors that a suspicious target breaks into a target protection space, and monitors that physical parameters of the suspicious target conform to the characteristics of the size, the dimension and the navigational speed of the unmanned aerial vehicle; the method comprises the following steps that an acoustic identification device detects that an acoustic signal breaks into a flight noise frequency band of the unmanned aerial vehicle, the noise signal accords with the noise characteristic of the flight signal of the unmanned aerial vehicle through characteristic extraction, a low-altitude early warning radar, an electromagnetic monitoring device and the acoustic identification device transmit information to an early warning device, and the early warning device judges whether a suspicious target is the unmanned aerial vehicle or not through a multi-sensor information fusion method; if the suspicious target is not the unmanned aerial vehicle, the system continues to monitor; if the suspicious target is the unmanned aerial vehicle, entering the next step;
s3: the early warning device transmits early warning information to the control unit, the control unit controls the laser ranging radar to be started, the laser ranging radars at different positions respectively range the invading unmanned aerial vehicle, and the control unit calculates the absolute coordinates of the invading unmanned aerial vehicle according to the different distances from the laser ranging radar at the specified position to the invading unmanned aerial vehicle;
s4: the control unit sends the absolute coordinates of the invading unmanned aerial vehicle to the console and the interference unit driving unit, the console controls the directional optical interference device of the unmanned aerial vehicle to be started, the interference unit driving unit is started, and the optical signal transmitting device is driven to turn to the position of the invading unmanned aerial vehicle; after the unmanned aerial vehicle reaches a specified angle, the optical signal transmitting device is started to transmit a strong interference optical signal to the invading unmanned aerial vehicle to prevent the invading unmanned aerial vehicle from shooting by a camera, and the visible light part of the strong interference optical signal is used for preventing the unmanned aerial vehicle from shooting in the daytime; the infrared light part is used for preventing the unmanned aerial vehicle from shooting at night;
s5: after the invading unmanned aerial vehicle is intercepted or evacuated from a protected airspace, the directional optical interference device of the unmanned aerial vehicle automatically returns to the initial position, the optical signal emitting device is closed, and the system enters an early warning monitoring state again until the equipment is closed or the invading unmanned aerial vehicle is discovered again.
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