Many major drones interfered with civil aviation take-off and landing events

On February 9th, in response to the recent domestic incidents of drones taking off and landing flights by drones, Daji DJI officials issued a statement tonight and proposed a proposal.

Dacian suggested that the prohibition of flying and flying restrictions be enforced through technical means to reduce human-induced interference and that the no-fly and fly-off instructions be strictly enforced, which could greatly reduce the possibility of drones threatening civilian aircraft.

The following is the official proposal for DJI's DJI:

First, no-fly/restricted-flight area

Where can drones fly and fly? Most of the UAV products on the market are equipped with satellite positioning modules such as GPS or BeiDou, and the drone can know its real-time location and height. Taking Dajiang’s drone products as an example, DJI has a satellite positioning module for each product. In addition, it has collected geographical coordinates of more than 6,800 major airports worldwide, and pre-installs each of them. In drone products.

No-fly zone and restricted flight area around the airport (overhead view)

The central point at each end of each runway of the airport is the center with a radius of 4.5 km. Each zone defines a circular area. The approximate ellipse range formed by the two circles and the two circles (see the attached drawings) is based on It is designated as a no-fly zone. Drones cannot take off in the no-fly zone, and drones that enter the no-fly zone from the outside will immediately fall to the ground. From the edge of the no-fly zone with a radius of 4.5 km, a further 2.5 km is drawn and an extension line of 15 km at both ends of the runway is added. This is set as a restricted flight zone. Drones fly within the restricted-fly zone and their flight altitude is subject to mandatory restrictions.

The enforcement of the no-fly and fly-by-fighting instructions through technical means is actually an intelligent way for the drone to "do its thing." In addition, the use of technical means to reduce human-induced interference has resulted in strict enforcement of the no-fly and fly-by-order instructions. This will greatly reduce the possibility of drones threatening civilian aircraft.

Second, the manned aircraft's early warning avoidance technology

DJI understands that as a company, it is difficult to ensure the accuracy and timely update of airport coordinate information on a global scale. In addition, under certain circumstances, civil aircraft, navigable aircraft, helicopters, and other manned aircraft may be in our possession. Set a low-flying flight outside the no-fly zone. This is similar to the fact that when a motor vehicle enters a country lane in which people and vehicles are mixed, the visible fence can no longer exist. In view of this, the above-mentioned measures based on the restricted flight area of ​​the airport are insufficient to ensure safety.

In fact, long before the rise of civil drones, a technology called ADS-B was already in use between civil aviation aircraft and the air traffic control system. Common sense tells us that driving a night train without turning on the lights is an extremely dangerous driving behavior. In the same way, if a civil aviation aircraft is flying in the air like a nighttime light, if it can take the initiative to let air traffic control systems and surrounding aircraft know where it is, it can greatly increase the safety factor of the flight. The ADS-B broadcast warning technology emerged as a result.

The principle is that each civil aviation passenger aircraft is equipped with a set of ADS-B launching devices. At regular intervals, it sends out its own flight, geographical coordinates, heading, speed and other information to a certain special frequency. Other airliners receive response information from the ADS-B receiving device and can perform evasive actions in advance.

Let's take a look at the benefits of installing an ADS-B receiving device for civil drones.

Drones equipped with ADS-B receivers added a pair of "telescope" to their controllers. The system warns an approaching manned aircraft and constantly alerts and warns the controller. At the same time, the system will automatically assess the risk based on the relative distance of the civil aviation aircraft, the heading, and the current flying height of the UAV that the user operates. If there is a potential for unmanned aerial vehicles threatening civilian airliners, in China, the system can even force it to descend or force it to land.

Of course, the system will only make early warning of the location and level of potential risks, and take corresponding countermeasures according to different risk levels. It will not display any flight information of any civil airliner to avoid abuse of the technology.

In the future, Dajiang will gradually add new aircraft early warning systems to new products, especially high-performance aircraft, and some old products can also be equipped with this function through hardware and software upgrades.

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