The main method of UAV countermeasures

Dojammer 2022-07-05

For drones that are in an illegal flying state, they need to be reversed through detection and identification technology. At present, UAV jammer systems at home and abroad mainly adopt four countermeasures.

Interference blocking class

Electromagnetic interference: It can effectively block the communication between the drone and the console, cut off the remote control signal, digital transmission and graphic transmission signal of the drone, so that the drone enters a self-protection state after the signal is lost, so as to achieve forced landing or The purpose of driving the drone.

Navigation Signal Interference: Civilian UAVs usually use satellite navigation and positioning systems to locate themselves. By realizing navigation signal interference, the interference of drones can be blocked. The UAV cannot be accurately positioned after losing the navigation signal, thus affecting the flight control system of the UAV and limiting the flight of the UAV.

Acoustic Interference: Drones have an important component - gyroscopes, to help drones perceive their own flight status. The drone maintains its own balance through feedback from gyroscopes and control systems. Therefore, if the normal working of the gyroscope can be broken, the drone cannot work properly.

Handheld UAV Signal Jammer

Destroy the class directly

Missiles, laser weapons, microwave weapons, fighting drones, conventional firepower, etc. can all conduct directional attacks on drones to achieve the purpose of directly destroying drones.

However, this method requires high precision and high cost, as well as collateral losses due to drone crashes. Therefore, it is almost impossible to directly destroy UAVs in the civilian field.

Intercept capture class

Another countermeasure is interception and capture from the ground or air. The main methods include: capture net, drone capture, eagle capture, etc. It is more common to use a launcher to eject the capture net, but this method has limited range for the drone. In addition, large drones are used to capture small drones, and large 8-axis drones are used to capture small drones with a huge capture net underneath.

However, this method is difficult to control, and small drones have advantages in terms of flexibility, so they are not widely used. Also, by training the eagles, the drones are captured and brought to the designated area. In order to intercept and capture drones, drones need to be within visual range, so their range is very limited. With the development of UAV obstacle avoidance technology, interception and capture will become more and more difficult.

decoy control

Navigation signal lure: For civilian UAVs equipped with satellite navigation terminals, by transmitting false navigation satellite signals, the UAV navigation terminal can be deceived and confused, so that it is positioned at the false position preset by the system. No-fly zone, home point spoofing, route spoofing, etc. can be achieved through satellite positioning signal lure.

Radio signal hijacking: At present, the control signals used by drones are mostly 2.4GHz and 5.8GHz and other conventional civilian frequency bands. The radio signal hijacking technology is to first crack the communication protocol of the drone signal, and then send a stronger control signal to the drone to gain control of the drone.

Hacking techniques: Many drones on the market are controlled by mobile phones and tablets, and WiFi signal communication is used between the drone and the remote control, so many mature hacking techniques can be used to hijack the drone.

Qingdao Zhongke National Defense Technology Co., Ltd. (hereinafter referred to as Zhongke National Defense) is a high-tech enterprise dedicated to solving civilian UAV monitoring, identification and national defense problems through information security means. The company focuses on radio perception and target positioning, including UAV detection, positioning and reverse control, setting "remote early warning, accurate positioning, full tracking, full-time intelligent defense and automatic processing" to provide UAV data services, management, Early warning, countermeasure products and professional integration services provide low-altitude security and ensure public safety.

In recent years, with the gradual opening of the country's low-altitude airspace and the country's active support for the development of general aviation and UAV industry, traditional security system protection is mainly aimed at ground threats, resulting in increasingly prominent threats and harassment from aerial targets. The safety problems caused by the abuse of drones and black flying in some important areas of China have become increasingly prominent. The relevant state departments have sent a letter to request to strengthen the safety prevention and control of low-altitude small aircraft in some important areas. Countermeasures and build a three-dimensional security system.

The core team of China National Defense has been engaged in UAV navigation development for many years, and has profound technical accumulation and industrial application in navigation satellite signal simulation, signal processing algorithm, signal processing algorithm, software and hardware design and development, and information system integration. The company actively participates in the construction of military-civilian integration, and has successively established joint R&D centers with Chinese Academy of Sciences, Harbin Institute of Technology, Harbin Engineering University, Air Force Early Warning Academy, Army Aviation Academy and other universities, dedicated to the industrialization of China's national defense technology and providing world-leading research and development strength and technical support.

The independent research and development of China National Defense, the world's leading cognitive radio protocol cracking technology, serves the UAV countermeasure industry, and has independent intellectual property rights. The latest UAV countermeasure technology can be used to solve the detection, identification, positioning, defense and control problems of civil UAVs at home and abroad. It can cover more than 95% of drone types. It is widely used in the core areas of the party, government, military and government, national defense and military industries, aviation airports, ports, prisons, foreign affairs and major event venues, stadiums, oil refinery oil storage depots, nuclear power plants and industrial facilities. "Three no" (passive detection, no dead angle, unattended), "two standards" (precise strike, precise positioning of the pilot), "one identification" (identification of enemy and friendly drones) )specialty.

China National Defense takes technology as the core and service as the purpose, unswervingly safeguards national security, aviation security and public security, serves the modernization of science and technology and the cause of security, and plays an active role in promoting the rapid development of the UAV industry and security industry. .


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