阅读说明：本技术 一种利用伪卫星进行无人机导航欺骗的方法 (Method for unmanned aerial vehicle navigation deception by using pseudolite ) 是由 宋华伟 彭沈 陈跃鹏 于 2020-06-29 设计创作，主要内容包括：本发明涉及无人机反制的技术领域,特别是涉及一种利用伪卫星进行无人机导航欺骗的方法,对无人机发送伪卫星信号,对无人机进行导航欺骗,达到诱捕无人机的目的；包括以下步骤：S1、探测区域内的无人机；S2、对无人机的飞行路径进行监控；S3、视频图像与下一帧间的像素变化越多,无人机每秒发送的数据就越多,加密数据流流量就越大,人工判断加密数据流流量与场景之间关系,并以此判断无人机的意图；S4、无人机意图判断完毕后,根据无人机意图是否需要对无人机进行诱导；S5、通过伪卫星向无人机的控制系统发送虚假的地理位置坐标；S6、使用2.4G/5.8G/1.2G三频段跳频干扰模块切断无人机遥控信号和图像回传信号,使无人机迫降至规划区域。(The invention relates to the technical field of unmanned aerial vehicle countering, in particular to a method for carrying out unmanned aerial vehicle navigation deception by utilizing a pseudolite, which is used for sending a pseudolite signal to an unmanned aerial vehicle and carrying out navigation deception on the unmanned aerial vehicle so as to achieve the purpose of trapping the unmanned aerial vehicle; the method comprises the following steps: s1, detecting the unmanned aerial vehicle in the area; s2, monitoring the flight path of the unmanned aerial vehicle; s3, judging the relationship between the encrypted data stream flow and the scene manually, and judging the intention of the unmanned aerial vehicle according to the relationship, wherein the more the pixel change between the video image and the next frame is, the more the data sent by the unmanned aerial vehicle per second is, the larger the encrypted data stream flow is; s4, after the unmanned aerial vehicle intention is judged, the unmanned aerial vehicle is induced according to whether the unmanned aerial vehicle intention is needed or not; s5, sending false geographical position coordinates to a control system of the unmanned aerial vehicle through the pseudolite; s6, cutting off the remote control signal and the image return signal of the unmanned aerial vehicle by using a 2.4G/5.8G/1.2G three-frequency-band frequency hopping interference module, and forcing the unmanned aerial vehicle to descend to a planned area.)

1. A method for unmanned aerial vehicle navigation deception by utilizing pseudolites is characterized by comprising the following steps:

s1, detecting the unmanned aerial vehicle in the area;

s2, monitoring the flight path of the unmanned aerial vehicle, recording scenes on the flight path of the unmanned aerial vehicle, and monitoring the flow of the encrypted data stream between the unmanned aerial vehicle and the operation end;

s3, judging the relationship between the encrypted data stream flow and the scene manually, and judging the intention of the unmanned aerial vehicle according to the relationship, wherein the more the pixel change between the video image and the next frame is, the more the data sent by the unmanned aerial vehicle per second is, the larger the encrypted data stream flow is;

s4, after the unmanned aerial vehicle intention is judged, the unmanned aerial vehicle is induced according to whether the unmanned aerial vehicle intention is needed or not; if not, continuing to observe; if necessary, go to step S5;

s5, sending false geographical position coordinates to a control system of the unmanned aerial vehicle through the pseudolite, so as to control a navigation system and induce the unmanned aerial vehicle to fly to a wrong place;

s6, cutting off the remote control signal and the image return signal of the unmanned aerial vehicle by using a 2.4G/5.8G/1.2G three-frequency-band frequency hopping interference module, and forcing the unmanned aerial vehicle to descend to a planned area.

2. The method of claim 1, wherein the drone detection mode in step S1 includes three modes: firstly, an object position is judged by actively transmitting an echo of an electric wave by a low-altitude blind-filling radar, a plurality of photoelectric detectors and radio frequency spectrum detectors are arranged in an area, the object position detected by the radar is subjected to image recognition processing to detect an unmanned aerial vehicle, and the unmanned aerial vehicle is detected by analyzing and comparing frequency spectrum information and characteristics of communication signals of the unmanned aerial vehicle, so that the low-altitude blind-filling radar is suitable for the unmanned aerial vehicle flying at low altitude; secondly, detecting the high-altitude flying unmanned aerial vehicle by using a space-based detection platform and a ground-based remote early warning radar; thirdly, a radio protocol cracking technology: whether the signal is the unmanned aerial vehicle is judged by comparing the passively received environment radio signal with the unmanned aerial vehicle signal model.

3. The method of claim 2, wherein the encrypted data stream at S2 is monitored by using a radio frequency scanner to point at the drone to intercept WiFi signals sent from the drone, so as to monitor WiFi traffic.

4. The method for drone navigation spoofing using pseudolites as in claim 3, wherein said step S5 comprises the following steps:

(a) performing down-conversion, analog-to-digital conversion, filtering, de-spreading, demodulation and decoding on the captured radio signal, cracking a protocol comprising a link layer, a network layer and an application layer, and accurately analyzing the characteristics of the suspected unmanned aerial vehicle radio signal;

(b) and generating a pseudo satellite navigation signal containing deception information, and aligning signal parameters of the pseudo satellite navigation signal and the real satellite signal reaching the unmanned aerial vehicle antenna to enable the unmanned aerial vehicle to fly to a designated area.

5. The method of drone navigation spoofing using pseudolites of claim 4 wherein said drone intent of step S3 comprises:

(1) shooting a single figure, wherein the WiFi flow changes along with the action change of the figure in the shooting process, so that the unmanned aerial vehicle can be judged to shoot the figure deliberately;

(2) shooting a single scene, wherein the WiFi flow changes along with scene changes in the shooting process, so that the situation that the unmanned aerial vehicle shoots the scene intentionally can be judged;

(3) shooting in the no-fly zone deliberately;

(4) shooting is carried out on the people flow or the scene flow in the non-no-fly area, and no deliberate shooting exists.

Technical Field

The invention relates to the technical field of unmanned aerial vehicle countering, in particular to a method for unmanned aerial vehicle navigation deception by utilizing a pseudolite.

Background

As is well known, in recent years, with the gradual and orderly opening of low-altitude fields at home and abroad, the global consumer-grade small rotor unmanned aerial vehicle is developed vigorously, and according to statistics, the Chinese consumer-grade light small unmanned aerial vehicle has a rapid growth trend every year since 2010. While light and small unmanned aerial vehicles have a beneficial application prospect in various industries, the light and small unmanned aerial vehicles are being used more and more maliciously, such as the harm to civil aviation safety, the manufacture of terrorist attacks, the invasion of public privacy and the like, and serious potential safety hazards are brought to the society and individuals. The supervision policy, regulation and countermeasures for the unmanned aerial vehicle in various countries in the world are far behind the development speed of the unmanned aerial vehicle, and various light and small unmanned aerial vehicle safety accidents are frequently found in the newspaper end.

At present, the mainstream solution for the counter-braking of the light and small unmanned aerial vehicle in the market is a technical solution based on the combination of active detection radar detection, radio monitoring, photoelectric detection and radio voltage system interference or the combination of a plurality of types of active detection radar detection, the detection equipment detects and tracks the remote unmanned aerial vehicle, and guides the counter-braking interference equipment to perform radio interference on a remote control link and a navigation signal of the unmanned aerial vehicle, so that the unmanned aerial vehicle is forced to land or return to the air, and the aim of protecting the unmanned aerial vehicle in a key area is fulfilled.

Pseudolites (PL) are transmitters that emit some kind of positioning signal, usually GPS-like, and are arranged on the ground. Also for this reason, so-called pseudolites are pseudolites designed for GPS. Of course, there are very few pseudolites that simulate the Galileo or GLONASS systems, and even some special purpose pseudolites use custom positioning signal formats.

Disclosure of Invention

In order to solve the technical problem, the invention provides a method for carrying out unmanned aerial vehicle navigation deception by utilizing a pseudolite, which is used for sending a pseudolite signal to an unmanned aerial vehicle and carrying out navigation deception on the unmanned aerial vehicle so as to achieve the purpose of trapping the unmanned aerial vehicle.

The invention discloses a method for unmanned aerial vehicle navigation deception by utilizing a pseudolite, which comprises the following steps:

s1, detecting the unmanned aerial vehicle in the area;

s2, monitoring the flight path of the unmanned aerial vehicle, recording scenes on the flight path of the unmanned aerial vehicle, and monitoring the flow of the encrypted data stream between the unmanned aerial vehicle and the operation end;

s3, judging the relationship between the encrypted data stream flow and the scene manually, and judging the intention of the unmanned aerial vehicle according to the relationship, wherein the more the pixel change between the video image and the next frame is, the more the data sent by the unmanned aerial vehicle per second is, the larger the encrypted data stream flow is;

s4, after the unmanned aerial vehicle intention is judged, the unmanned aerial vehicle is induced according to whether the unmanned aerial vehicle intention is needed or not; if not, continuing to observe; if necessary, go to step S5;

s5, sending false geographical position coordinates to a control system of the unmanned aerial vehicle through the pseudolite, so as to control a navigation system and induce the unmanned aerial vehicle to fly to a wrong place;

s6, cutting off the remote control signal and the image return signal of the unmanned aerial vehicle by using a 2.4G/5.8G/1.2G three-frequency-band frequency hopping interference module, and forcing the unmanned aerial vehicle to descend to a planned area.

The invention discloses a method for unmanned aerial vehicle navigation deception by utilizing a pseudolite, wherein an unmanned aerial vehicle detection mode in the step S1 comprises the following three modes: firstly, an object position is judged by actively transmitting an echo of an electric wave by a low-altitude blind-filling radar, a plurality of photoelectric detectors and radio frequency spectrum detectors are arranged in an area, the object position detected by the radar is subjected to image recognition processing to detect an unmanned aerial vehicle, and the unmanned aerial vehicle is detected by analyzing and comparing frequency spectrum information and characteristics of communication signals of the unmanned aerial vehicle, so that the low-altitude blind-filling radar is suitable for the unmanned aerial vehicle flying at low altitude; secondly, detecting the high-altitude flying unmanned aerial vehicle by using a space-based detection platform and a ground-based remote early warning radar; thirdly, a radio protocol cracking technology: whether the signal is the unmanned aerial vehicle is judged by comparing the passively received environment radio signal with the unmanned aerial vehicle signal model.

In the method for performing unmanned aerial vehicle navigation deception by using the pseudolite, the encrypted data stream monitoring mode in the S2 is to use a radio frequency scanner to point to the unmanned aerial vehicle to intercept WiFi signals sent by the unmanned aerial vehicle so as to monitor WiFi flow of the unmanned aerial vehicle.

The invention discloses a method for unmanned aerial vehicle navigation deception by utilizing a pseudolite, which comprises the following specific steps in step S5:

(a) performing down-conversion, analog-to-digital conversion, filtering, de-spreading, demodulation and decoding on the captured radio signal, cracking a protocol comprising a link layer, a network layer and an application layer, and accurately analyzing the characteristics of the suspected unmanned aerial vehicle radio signal;

(b) and generating a pseudo satellite navigation signal containing deception information, and aligning signal parameters of the pseudo satellite navigation signal and the real satellite signal reaching the unmanned aerial vehicle antenna to enable the unmanned aerial vehicle to fly to a designated area.

The invention relates to a method for unmanned aerial vehicle navigation deception by utilizing pseudolites, wherein in the step S3, the unmanned aerial vehicle intention comprises the following steps:

(1) shooting a single figure, wherein the WiFi flow changes along with the action change of the figure in the shooting process, so that the unmanned aerial vehicle can be judged to shoot the figure deliberately;

(2) shooting a single scene, wherein the WiFi flow changes along with scene changes in the shooting process, so that the situation that the unmanned aerial vehicle shoots the scene intentionally can be judged;

(3) shooting in the no-fly zone deliberately;

(4) shooting is carried out on the people flow or the scene flow in the non-no-fly area, and no deliberate shooting exists.

Compared with the prior art, the invention has the beneficial effects that: firstly, the unmanned aerial vehicle is detected in multiple modes, so that the coverage is greatly improved, and the phenomenon of missed detection of the unmanned aerial vehicle is prevented; secondly, after the unmanned aerial vehicle is detected, the path, the shooting scene and the encrypted data stream flow are monitored, so that the intention of the unmanned aerial vehicle is judged and the unmanned aerial vehicle is processed according to the intention; and thirdly, carrying out all-dimensional analysis on the characteristics of the radio signals of the unmanned aerial vehicle, and sending pseudo satellite signals by taking the characteristics as a reference so as to enable the unmanned aerial vehicle to fly to a wrong place to finish navigation cheating.

Drawings

FIG. 1 is a flow chart of the present invention;

FIG. 2 is a flow chart of S5 of the present invention;

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

As shown in fig. 1 to 2, a method for drone navigation spoofing using pseudolites of the present invention includes the following steps:

s1, detecting the unmanned aerial vehicle in the area;

s2, monitoring the flight path of the unmanned aerial vehicle, recording scenes on the flight path of the unmanned aerial vehicle, and monitoring the flow of the encrypted data stream between the unmanned aerial vehicle and the operation end;

s3, judging the relationship between the encrypted data stream flow and the scene manually, and judging the intention of the unmanned aerial vehicle according to the relationship, wherein the more the pixel change between the video image and the next frame is, the more the data sent by the unmanned aerial vehicle per second is, the larger the encrypted data stream flow is;

s4, after the unmanned aerial vehicle intention is judged, the unmanned aerial vehicle is induced according to whether the unmanned aerial vehicle intention is needed or not; if not, continuing to observe; if necessary, go to step S5;

s5, sending false geographical position coordinates to a control system of the unmanned aerial vehicle through the pseudolite, so as to control a navigation system and induce the unmanned aerial vehicle to fly to a wrong place;

s6, cutting off the remote control signal and the image return signal of the unmanned aerial vehicle by using a 2.4G/5.8G/1.2G three-frequency-band frequency hopping interference module, and forcing the unmanned aerial vehicle to descend to a planned area.

The invention discloses a method for unmanned aerial vehicle navigation deception by utilizing a pseudolite, wherein an unmanned aerial vehicle detection mode in the step S1 comprises the following three modes: firstly, an object position is judged by actively transmitting an echo of an electric wave by a low-altitude blind-filling radar, a plurality of photoelectric detectors and radio frequency spectrum detectors are arranged in an area, the object position detected by the radar is subjected to image recognition processing to detect an unmanned aerial vehicle, and the unmanned aerial vehicle is detected by analyzing and comparing frequency spectrum information and characteristics of communication signals of the unmanned aerial vehicle, so that the low-altitude blind-filling radar is suitable for the unmanned aerial vehicle flying at low altitude; secondly, detecting the high-altitude flying unmanned aerial vehicle by using a space-based detection platform and a ground-based remote early warning radar; thirdly, a radio protocol cracking technology: whether the signal is the unmanned aerial vehicle is judged by comparing the passively received environment radio signal with the unmanned aerial vehicle signal model.

In the method for performing unmanned aerial vehicle navigation deception by using the pseudolite, the encrypted data stream monitoring mode in the S2 is to use a radio frequency scanner to point to the unmanned aerial vehicle to intercept WiFi signals sent by the unmanned aerial vehicle so as to monitor WiFi flow of the unmanned aerial vehicle.

The invention discloses a method for unmanned aerial vehicle navigation deception by utilizing a pseudolite, which comprises the following specific steps in step S5:

(a) performing down-conversion, analog-to-digital conversion, filtering, de-spreading, demodulation and decoding on the captured radio signal, cracking a protocol comprising a link layer, a network layer and an application layer, and accurately analyzing the characteristics of the suspected unmanned aerial vehicle radio signal;

(b) and generating a pseudo satellite navigation signal containing deception information, and aligning signal parameters of the pseudo satellite navigation signal and the real satellite signal reaching the unmanned aerial vehicle antenna to enable the unmanned aerial vehicle to fly to a designated area.

The invention relates to a method for unmanned aerial vehicle navigation deception by utilizing pseudolites, wherein in the step S3, the unmanned aerial vehicle intention comprises the following steps:

(1) shooting a single figure, wherein the WiFi flow changes along with the action change of the figure in the shooting process, so that the unmanned aerial vehicle can be judged to shoot the figure deliberately;

(2) shooting a single scene, wherein the WiFi flow changes along with scene changes in the shooting process, so that the situation that the unmanned aerial vehicle shoots the scene intentionally can be judged;

(3) shooting in the no-fly zone deliberately;

(4) shooting is carried out on the people flow or the scene flow in the non-no-fly area, and no deliberate shooting exists.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.