KR20230060940A - System and method for pointing the position of intrusion drones and performing directional jamming using a combination of omni-directional radar detection and directional RF detection - Google Patents

Abstract

In accordance with one embodiment of the present invention, a system for measuring and disturbing a position of an intruding drone by combining omni-directional Rf detection and directional radar detection, includes: an omnidirectional radar part detecting at least one target object within a predetermined space at a conquest reference or relative azimuth reference angle; a directional RF direction part detecting an intruding drone among target objects targeted within the predetermined space by using RF signals; a flight jamming part outputting a jamming signal for jamming the flight of the intruding drone to a spatial location of the intruding drone; and a detection control part designating a target object, from which a drone signal is received, among at least one target object, and, when the drone signal is not received, determining the situation as a false positive error by the omnidirectional radar part to analyze whether the drone is intruding within the predetermined space, and controlling the operation of each component based on the analysis result. Therefore, the present invention enables 360-degree automatic defense only through one single low-priced low-output directional jammer.

Description

System and method for pointing the position of intrusion drones and performing directional jamming using a combination of omni-directional radar detection and directional RF detection}

The present invention relates to a system and method for locating and jamming intruder drones using a combination of omni-directional radar and directional RF direction finding.

With the development of drone technology, drones are being applied in various fields. On the other hand, unfair use of such drones, for example, attacks using drones or inspections of protected areas, etc. have become a problem.

Accordingly, detection technologies for these drones have recently been developed. As a prior art for such drone detection technology, there is Korean Patent Registration No. 10-2082206. This conventional drone detection technology relates to a technology for estimating the location of a drone by receiving a signal for a frequency band used for drone control.

However, this conventional drone detection technology has a problem in that accuracy is low because the location of the drone is determined using one antenna. Therefore, there is a limit to the search and defense of the drone only when a second response is performed, such as a person having to visually respond.

Accordingly, there is a growing need for a system that accurately determines the location of a drone and automatically performs a drone blocking function for the determined drone.

Korean Patent Registration No. 10-2082206

An object of the present invention is to provide a system and method for measuring and disturbing the position of an intruder drone using a combination of omnidirectional radar and directional RF direction finding that can solve the conventional problems.

The above objects and various advantages of the present invention will become more apparent from preferred embodiments of the present invention by those skilled in the art.

A system for measuring and disturbing the position of an intruder drone using a combination of omnidirectional radar and directional RF direction finding according to an embodiment of the present invention for solving the above problems is a conquest standard or a relative azimuth reference angle within a preset space. An omni-directional radar unit for detecting at least one target object; a directional RF direction finder that detects only intruder drones among target objects targeted within the preset space using RF signals; a flight jamming unit outputting a jamming signal for disturbing flight to the spatial position of the intruder drone; and designating a target object to which a drone signal is received among the at least one or more target objects, and if the drone signal is not received, it is regarded as a false positive error by the omni-directional radar unit, and the drone is within a preset space. and a detection and control unit that analyzes whether or not an intrusion exists and controls the operation of each component based on the analyzed analysis result.

In one embodiment, the omnidirectional radar and the directional RF direction finder are installed at the same or different points.

In one embodiment, it is characterized in that the directional RF direction detection unit and the flight disturbance unit are installed at the same or different points.

In one embodiment, the detection control unit is characterized in that for controlling the rotation angle of the omni-directional radar and the directional RF direction detection unit to track the variable position of the intruder drone.

In order to solve the above problems, a method for measuring and disturbing the position of an intruder drone using a combination of omnidirectional radar and directional RF direction finding according to an embodiment of the present invention is an omnidirectional radar and directional RF direction finding and flight jamming unit. Acquiring location coordinates and heading direction information of (jammer); Detecting a target object flying within a preset space with an omni-directional radar; calculating a rotation angle of a directional RF direction finder for detecting the target object in a detection control unit; detecting the target object after rotating at the rotation angle calculated by the directional RF direction finder; If the drone signal is not received by the detection and control unit, analyzing whether or not a drone has invaded a preset space by considering it as a false positive error by the omni-directional radar unit; determining whether the location of the intruder drone satisfies a jamming condition in the detection and control unit; and if the jamming condition is satisfied, a flight jamming unit irradiates a jamming signal to the position of the intruder drone to disturb the flight of the intruder drone.

In the conventional case, the method using a plurality of existing RF direction finders requires the installation of multiple expensive omnidirectional finders to enable 360º direction and location detection. While altitude and speed information cannot be grasped, conventional radar methods misrecognize non-drones (birds, balloons, etc.) as drones despite using expensive radars, or generate many false targets due to clutter. Existing jamming methods have the problem of using as many jammers as the number of detectors, using very expensive 360º high-power jammers, or using handheld jammers.

In contrast, the present invention enables omnidirectional location detection with only one omni-directional radar and one low-cost rotary directional RF direction finder, and uses the RF direction finder together to clearly distinguish between drones and other tracks, and the drone's RF signal Using the information, it is possible to identify the manufacturer, used frequency, protocol, etc., and since radar is used, the 3-dimensional location, altitude, speed, and direction of flight of the intruding drone can be clearly known, and the altitude and location of the drone can be known. It provides the advantage of being able to automatically defend 360º with only one low-cost, low-power directional jammer.

1 is a device configuration diagram of a system for measuring and disturbing the position of an intruder drone using a combination of omnidirectional radar and directional RF direction finding according to an embodiment of the present invention.
2 is a flowchart illustrating a method for measuring and disturbing the position of an intruder drone using a combination of omnidirectional radar and directional RF direction finding according to an embodiment of the present invention.
FIG. 3 is an exemplary view for explaining the S730 process shown in FIG. 2 .

Various embodiments and/or aspects are now disclosed with reference to the drawings. In the following description, for purposes of explanation, numerous specific details are set forth in order to facilitate a general understanding of one or more aspects. However, it will also be appreciated by those skilled in the art that such aspect(s) may be practiced without these specific details. The following description and accompanying drawings describe in detail certain illustrative aspects of one or more aspects. However, these aspects are exemplary and some of the various methods in principle of the various aspects may be used, and the described descriptions are intended to include all such aspects and their equivalents.

Moreover, various aspects and features will be presented by a system that may include a number of devices, components and/or modules, and the like. It should also be noted that various systems may include additional devices, components and/or modules, and/or may not include all of the devices, components, modules, etc. discussed in connection with the figures. It must be understood and recognized.

"Example", "example", "aspect", "exemplary", etc., used herein should not be construed as preferring or advantageous to any aspect or design being described over other aspects or designs. . The terms 'component', 'module', 'system', 'interface', etc. used below generally refer to a computer-related entity, such as hardware, a combination of hardware and software, can mean software.

In addition, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or”. That is, unless otherwise specified or clear from the context, “X employs A or B” is intended to mean one of the natural inclusive substitutions. That is, X uses A; X uses B; Or, if X uses both A and B, "X uses either A or B" may apply to either of these cases. Also, the term "and/or" as used herein should be understood to refer to and include all possible combinations of one or more of the listed related items.

Also, the terms "comprises" and/or "comprising" mean that the feature and/or element is present, but excludes the presence or addition of one or more other features, elements and/or groups thereof. It should be understood that it does not. Also, unless otherwise specified or where the context clearly indicates that a singular form is indicated, the singular in this specification and claims should generally be construed to mean "one or more". Additionally, as used herein, the terms “client,” “user,” and “user” may often be used interchangeably. Additionally, the terms “component” and “element” as used herein may also be used interchangeably at times.

Hereinafter, based on the accompanying drawings, a location detection system and method based on omnidirectional radar and directional RF direction finding according to an embodiment of the present invention will be described in detail.

1 is a device configuration diagram of a system for measuring and disturbing the position of an intruder drone using a combination of omnidirectional radar and directional RF direction finding according to an embodiment of the present invention.

As shown in FIG. 1, a system 100 for measuring and jamming the position of an intruder drone using a combination of omni-directional radar and directional RF direction finding according to an embodiment of the present invention is provided with omni-directional radar and directional RF direction finding. Based on the detection signal of the intruder drone detected by the detector, it may be an invention to determine the existence of an intruder drone and analyze its exact location, and to provide a jamming signal to disturb the flight of the intruder drone to the analyzed position.

More specifically, the system 100 for measuring and disturbing the position of an intruder drone using a combination of an omnidirectional radar and a directional RF direction finder according to an embodiment of the present invention includes an omnidirectional radar unit 200, a directional RF direction finder It includes a detection unit 300, a flight disturbance unit 400 and a detection control unit 500.

The omni-directional radar unit 200 is an omni-directional radar in the form of combining a single or multiple phased array type radars, or a directional radar that continuously rotates in all directions (360 degrees) to detect flying objects within a preset detection space. can be a composition.

For reference, in the case of radar, radio waves are transmitted, radio waves reflected by the drone are analyzed, and information such as the drone's three-dimensional position, speed, and direction is obtained. Since several false positive targets are formed due to cluster occurrence of , there is a limitation that the type of flying object cannot be identified with the configuration for detecting the flying object.

The directional RF direction detection unit 300 may be a detection device that detects while rotating in all directions in a preset detection space. The rotated directional RF direction finder may be configured to receive a drone signal among several targets detected by the radar.

For reference, in the case of a directional RF direction finder, the communication signal between the drone and the operator (usually 2.4Ghz or 5.8GHz Wifi band) is received and compared with the signal waveform of the drone library built into the detector to determine whether it is a drone or not. As a configuration, it may be a device used to identify the drone manufacturer and the type of communication protocol used, prevent the 2-dimensional direction of the drone using the AOA method, and specify the 2-dimensional location using an intersection when using a plurality of devices.

For reference, the directional RF direction finder has a limitation that it cannot detect the altitude and speed of the drone.

Next, the flight jamming unit 400 may be configured to output a jamming signal when the location coordinates of the intruder drone are located within a preset area (jamming conditions are satisfied).

The flight jamming unit 400 is configured to output a jamming signal for disturbing the flight to the spatial position of the intruder drone based on a control signal of the detection control unit 500 described later. It may be mounted on or separated from the RF direction detection unit 300, and may include a configuration for rotating in the case of a separate configuration.

Next, the detection control unit 500 designates a target object to which a drone signal is received among at least one target object, and when the drone signal is not received, a false positive error by the omni-directional radar unit is generated. It may be a configuration that considers and analyzes whether or not drones invade a preset space, and controls the operation of each component based on the analyzed analysis result.

In addition, the detection control unit 500 may be configured to synchronize rotational motions of the directional RF direction finding unit 300 and the flight jamming unit 400 .

In addition, the detection control unit 500 may include a configuration for automatically acquiring the position (coordinates) of each detection device by inputting (latitude, longitude or GPS value) and when the detector is a built-in GPS type. Here, the separation distance of each detection part is possible from 0m to several Km depending on the site situation.

In addition, it may include a configuration for automatically acquiring the direction of each detection unit (either true north or relative position), when the detection unit has a built-in electronic compass.

In addition, a configuration for acquiring the position and direction of the flight jamming unit (jammer) may be included, and a configuration for automatically acquiring the jammer may be included if the jammer has a built-in GPS or electronic compass.

Here, the flight jamming unit (jammer) may be installed in the same pan unit as the radar and directional RF direction finding unit, or may be installed in an independent place.

More specifically, the detection control unit 500 includes a location and each analysis unit 510, a drive control unit 520, a location tracking unit 530, and a synchronization unit 540.

The position and each analyzer 510 analyzes the location information of the corresponding flying object based on the radio wave reflected from the flying object detected by the omnidirectional radar unit 200, and directive RF direction for heading to the analyzed location coordinates. It may be configured to calculate the rotation angle of the detector 300 .

That is, the coordinate information of the target detected by the omnidirectional radar unit is substituted into the trigonometric function to calculate the rotation angle of the directional RF direction finding unit for each target.

In addition, the location and each analysis unit 510 designates a target (drone) based on the drone signal received from the flying object. At this time, if the drone signal is not received, it is a false positive error by the omnidirectional radar. It may be configured to consider and process as no drone intrusion.

That is, the position and each analysis unit 510 may filter false positive errors among a plurality of flying objects detected by the omnidirectional radar unit 200 to extract only drones from among the flying objects.

In addition, the position and each analysis unit 510 detects an intrusive drone regardless of whether the drone signal is received by the directional RF direction finding unit when the entry speed of the flying object detected by the omnidirectional radar unit 510 is higher than a certain speed (fixed-wing drone, etc.) It may be a configuration considered as .

Next, the drive control unit 520 may be a component that controls the operation of each component.

More specifically, the driving control unit 520 controls the detection operation of the omni-directional radar unit 200 and the directional RF direction detection unit 300, and the detection area according to the location and the setting value of each analysis unit 410. , it may be a configuration that adjusts the detection distance.

In addition, the driving control unit 520 may be a component that controls rotation of the directional RF direction detection unit 300 based on the position and the rotation angle calculated by each analysis unit 510 .

Next, the location tracking unit 530 may be configured to track the drone signal received from the omnidirectional radar unit 200 and filtered through the directional RF direction finding unit 300 .

The position tracking unit 530 calculates the rotation angle of the Pan Unit (rotation unit) according to the drone position change so that the drone detected by the omnidirectional radar unit 200 and the directional RF direction finding unit 300 can be continuously tracked. may be requested to the location and each analysis unit.

The location tracker 530 may be configured to re-perform target filtering based on the direction by the RF direction finder when the omnidirectional radar misses the drone during tracking.

Next, the synchronization unit 540 may be configured to synchronize rotation of the directional RF direction finding unit 300 and the flight jamming unit 400 .

2 is a flowchart illustrating a method for measuring and disturbing the position of an intruder drone using a combination of an omnidirectional radar and a directional RF direction finder according to an embodiment of the present invention.

Referring to FIG. 2, a method (S700) for measuring and disturbing the position of an intruder drone using a combination of an omni-directional radar and a directional RF direction finder according to an embodiment of the present invention includes an omni-directional radar, a directional RF direction finder and After obtaining the positional coordinates and heading direction information of the flight jammer (jammer) (S710), a target object flying within a preset space is detected by the omni-directional radar (S720).

after, The detection control unit 500 calculates the rotation angle of the directional RF direction finder for detecting the target object (S730), and after the directional RF direction finder 300 rotates at the calculated rotation angle, the target object Detect (S740).

When the drone signal is not received by the directional RF direction finding unit 300, the detection and control unit 500 regards it as a false positive error by the omni-directional radar unit and processes it as no drone intrusion.

When the drone signal is received by the directional RF direction finding unit 300, the detection control unit 500 tracks the intruder drone based on the coordinate information of the target object provided by the omnidirectional radar 200.

Then, after determining whether the position of the intruder drone meets the jamming condition (S760), if the jamming condition is met, the flight jamming unit investigates the jamming signal to the position of the intruder drone to prevent the intruder drone from flying. Disturb (S770).

When the process S770 is completed, the directional RF direction finding unit is operated to return to the original direction (heading), and updates the initially determined drone intrusion location and tracking result.

In the conventional case, the method using a plurality of existing RF direction finders requires the installation of multiple expensive omnidirectional finders to enable 360º direction and location detection. While altitude and speed information cannot be grasped, conventional radar methods misrecognize non-drones (birds, balloons, etc.) as drones despite using expensive radars, or generate many false targets due to clutter. Existing jamming methods require the use of as many jammers as the number of detectors or the use of very expensive 360º high-power jammers. Or, there is a problem in that a portable jammer must be used by putting in manpower.

On the other hand, the present invention enables omnidirectional location detection with only one omni-directional radar and a low-cost rotary directional RF direction finder, and since the RF direction finder is used together, it clearly distinguishes between drones and other tracks, and collects drone RF signal information. By using radar, you can know the 3-dimensional position, altitude, speed, and direction of flight of the intruding drone, and you know the altitude and location of the drone. It has the advantage of being able to automatically defend 360º with only one low-power directional jammer.

The device described above may be implemented as a hardware component, a software component, and/or a combination of hardware components and software components. For example, devices and components described in the embodiments may include, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, and a field programmable array (FPA). ), programmable logic unit (PLU), microprocessor, or any other device capable of executing and responding to instructions.

The processing device may run an operating system (OS) and one or more software applications running on the operating system. A processing device may also access, store, manipulate, process, and generate data in response to execution of software. For convenience of understanding, there are cases in which one processing device is used, but those skilled in the art will understand that the processing device includes a plurality of processing elements and/or a plurality of types of processing elements. It can be seen that it can include.

For example, a processing device may include a plurality of processors or a processor and a controller. Also, other processing configurations are possible, such as parallel processors. Software may include a computer program, code, instructions, or a combination of one or more of the foregoing, which configures a processing device to operate as desired or processes independently or collectively. The device can be commanded. Software and/or data may be any tangible machine, component, physical device, virtual equipment, computer storage medium or device, intended to be interpreted by or provide instructions or data to a processing device. , or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed on networked computer systems and stored or executed in a distributed manner. Software and data may be stored on one or more computer readable media.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program commands recorded on the medium may be specially designed and configured for the embodiment or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and floptical disks. Included are hardware devices specially configured to store and execute program instructions, such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language codes that can be executed by a computer using an interpreter, as well as machine language codes such as those produced by a compiler. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

As described above, although the embodiments have been described with limited drawings, those skilled in the art can make various modifications and variations from the above description. For example, the described techniques may be performed in an order different from the methods described, and/or components of the described systems, structures, devices, circuits, etc. may be combined or combined in a different manner than the methods described, or in a different configuration. Appropriate results can be achieved even when substituted or substituted by elements or equivalents. Therefore, other implementations, other embodiments, and equivalents of the claims are within the scope of the following claims.

100: A system for locating and jamming intruder drones using a combination of omnidirectional radar detection and directional RF direction finding.
200: omnidirectional radar unit
300: directional RF direction finding unit
400: Flight Disruption Department
500: detection control unit
510: position and each analysis unit
520: location tracking unit
530: driving control unit
540: synchronization unit

Claims (5)

an omnidirectional radar unit for detecting at least one target object at a conquering standard or a relative azimuth standard angle within a preset space;
a directional RF direction finder for detecting an intruder drone among target objects targeted within the preset space using an RF signal;
a flight jamming unit outputting a jamming signal for disturbing flight to the spatial position of the intruder drone; and
Among the at least one or more target objects, a target object to which a drone signal is received is designated, and if the drone signal is not received, it is regarded as a false positive error by the omni-directional radar unit, and the drone is detected within a preset space. A system for measuring and disturbing the location of intruder drones by using a combination of omni-directional radar and directional RF direction finding, including a detection control unit that analyzes intrusion and controls the operation of each component based on the analyzed analysis result.
According to claim 1,
The omnidirectional radar unit and the directional RF direction finding unit are installed at the same or different points.
According to claim 1,
The directional RF direction finding unit and the flight jamming unit are installed at the same or different points.
According to claim 1,
The detection control unit
A system for measuring and disturbing the position of an intruder drone by using a combination of omnidirectional radar and directional RF direction finding that controls the rotation angle of the omnidirectional radar unit and the directional RF direction finding unit to track the variable position of the intruder drone .
Acquiring location coordinates and heading direction information of an omni-directional radar unit, a directional RF direction finding unit, and a flight jamming unit (jammer);
Detecting a target object flying within a preset space with an omni-directional radar;
calculating a rotation angle of a directional RF direction finder for detecting the target object in a detection control unit;
detecting the target object after rotating at the rotation angle calculated by the directional RF direction finding unit;
If the drone signal is not received by the detection and control unit, analyzing whether or not a drone has invaded a preset space by considering it as a false positive error by the omni-directional radar;
counting and tracking the target object from which the drone signal is received as an intruder drone in the detection and control unit;
determining whether the location of the intruder drone satisfies a jamming condition in the detection and control unit; and
When the jamming condition is met, the flight jamming unit irradiates a jamming signal to the location of the intruder drone to disturb the flight of the intruder drone. A method for measuring and perturbing.

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