Types and Principles of UAV Countermeasure System

In recent years, drones have become popular since childhood. Behind the widespread use of UAVs is more about how to manage the flight of UAVs, especially the safety hazards and accidents caused by UAVs "black flying". Therefore, with the passage of time, drone countermeasure equipment has become a necessary way to combat "black flying". Existing UAV countermeasure systems include blocking influence, signal interference, sound wave influence, radio wave influence, violent destruction, high technology and so on.

Barrier influence type

This type is an anti-drone mode that is more suitable for the proliferation and widespread use of drones. The broad application of interdiction counter-drone strategies involves firing directed sound waves or radio frequency at target drones, affecting the drone's hardware or disconnecting the communication between the drone and the controller, thereby forcing the drone to land or return on its own.

signal interference

Generally speaking, the simplest and most direct way to affect isolation is signal interference. This method has relatively low technical content and low cost. At present, most drones on the market use a combination of GPS satellite navigation system and inertial navigation system. It's not hard to affect the GPS signal. The drone jammer only needs to transmit a certain power of directional radio frequency to the target drone. After the GPS signal of the UAV is affected, it is impossible to obtain accurate self-coordinate data, which will cause the UAV to lose control to a certain extent, resulting in work failure. However, this method is also how many "siege" drones are used.

sound wave effect

Compared with signal interference, the impact of sound waves is much higher, and the degree of damage is higher than signal interference. Unlike signal jamming, this method uses sound waves to affect the drone's hardware, rendering it incapable of functioning. There is an important part inside the drone - the gyroscope, which can provide the drone with information such as body tilt, rotation, and direction perspective, so as to maintain the balance of the body. South Korean researchers have proved that when the frequency of the sound wave is consistent with the resonance frequency of the drone's gyroscope, resonance will occur, making the gyroscope unable to work properly and causing the drone to fall. Although the way to affect hardware and price is relatively accurate, but

Radio influence

When it comes to blocking anti-drone systems, we have to mention the AUDS system. The system primarily uses high-power radio waves to destroy drones. In simple terms, this radio wave can effectively block the drone's communication and shut down the drone in mid-air. The defense system also has a long attack range and can attack threat drones up to 1.6 kilometers away. It only takes 10-15 seconds to aim at the target, and it can also launch a "swarm attack" on drones, destroying multiple drones at once, which poses a great threat to black flying drones.

violent destruction

Compared with the mild anti-drone mode influenced by radio waves, the violent anti-drone mode is mostly used in the military, and its characteristic is one word: violence! The purpose is also very direct: to cut grass and roots, leaving no room for it.

high tech

Boeing has also come up with counter-drone solutions and introduced laser cannons, the main tool of the strategy. The laser cannon includes a high-energy laser mobile launcher developed by Boeing itself. After testing, the transmitter emits laser light under the premise of full power, and it only takes two seconds to burn holes in the casing of the drone. This destructive power is a fatal blow to flying drones. Another advantage of this laser cannon is that the cost of use is extremely low and it can work with a 220V power supply. In other words, the drone can be dropped from the sky just by being plugged in.

physical shell

In order to rectify these drones, weapons manufacturers are not idle. The American SnakeRiver company once launched a special drone bullet that can easily destroy drones with their company's equipment. Coincidentally, Combat Nation Russia has also launched a weapon specifically for anti-drone-the shoulder-mounted anti-drone device SkyWall100, which is driven by compressed air and can launch a mesh catcher to the drone to capture illegally intruded drones. However, they were shot down after the fighting nation was lightly shot down compared to the U.S. drone bullets.

System control type

Whether it affects the barrier or directly destroys it, it is easy to cause the drone to crash and cause additional impact. To prevent this from happening, a more secure approach must be taken. The researchers demonstrated at the DefCon hacker conference that the drone produced by Parrot fell from the sky through WiFi hijacking. The principle is to use the built-in WiFi function and open telnet port in the BusyBox real-time operating system to invade and operate the drone.

Auxiliary anti-drone

In addition to the hacker's anti-drone mode, some method of identifying and locating drones is needed to ensure that the drone can be accurately identified, so some other techniques are also required. The ADUS system mentioned above integrates Bright’s A400 series Ku-band electronic scanning air defense radar with Chase’s electro-opTIc director, visible light camera, infrared camera and target tracking software to detect, track and identify drones within 8 kilometers. From this perspective, technologies such as radar, FM radio, and cameras can all be used to detect drones.

navigation control

As a cutting-edge technology, drones have brought a lot of convenience to people, which has led to so many drone counterattacks. In the final analysis, "Black Fly" is the original sin. Due to the proliferation of drones, many accidents have been caused. In order to reduce the harm of drones, the anti-drone system can only be used as the "police" of the drone industry and can only treat the symptoms. In order to avoid danger, we must strengthen control. This is the "law" that can cure the root cause.