On November 22, 2016, Extreme Flying Technology released the “Tianmu†UAV Vision System (XAIRCRAFT “XCope†UAV Vision System). The system incorporates a binocular obstacle avoidance and terrain vision module that gives the plant protection drone the ability to perceive the environment. This technology will be used as a safety option for the latest P20 2017 plant protection drones, and the SUPERX2 flight control system will also add corresponding functions.
P20 2017 with "Tianmu" drone vision system
According to reports, China has 2 billion mu of cultivated land, and the annual plant protection demand is about 8.6 billion mu. The lack of labor, inefficiency and extensive mode are the three major pain points in the field of plant protection. Replacing manpower with machines and improving the efficiency and precision of plant protection has always been the development direction of Feifei. From a technical point of view, the ultra-flying plant protection drone has been completed: the development and application of four key technologies: full autonomous flight control, RTK precision navigation, dynamic variable spraying and visual environment perception.
Four key technical diagrams of the ultra-flying plant protection drone
Extreme Flying said that full autonomous flight control allows the drone to no longer need people to remotely control, avoiding the limitations of personnel operations, reducing operating costs and improving plant protection efficiency. RTK technology increases the accuracy of the route from the meter to the centimeter level, making the automatic flight more accurate and reliable, reducing the loss of pesticide drift and heavy spray leakage. The dynamic variable spraying technology allows the plant protection drone to change the amount of spray according to flight speed, weather conditions and crop growth data, further reducing the amount of pesticides and fertilizers, as well as soil and water pollution. The launch of “Tianmu†has enabled the plant protection drone to have the ability to perceive the environment for the first time, effectively avoiding safety accidents caused by personnel negligence or other unexpected situations, and further improving the safety and reliability of the drone operation. Sex.
In October of this year, after the launch of the geographic information service, the plant protection drone users can directly generate automated work routes and mark obstacles based on location information. But it is still difficult to avoid some hidden dangers, such as fallen trees, fast-growing branches, new poles or people who suddenly break into the work area. The combination of the “Tianmu†vision system and the Feifei geographic information service can not only greatly reduce the time of route mapping, improve the safety of operations, but also allow the agricultural aircraft to enter a new stage and enter the artificial intelligence technology based on deep learning. Agricultural production has opened its doors.
Extreme flying obstacle avoidance is based on the parallax principle. It is an important form of computer vision. It uses two "eyes" of the imaging device to acquire two images of the measured object, and calculates the positional deviation between the corresponding points of the image. Get the three-dimensional information of the object, including the distance between the camera and the object and the distance between the objects in the line of sight. This is similar to the principle that the human eye perceives three-dimensional information of objects. After that, the sensed position data is imported into the obstacle avoidance module for calculation, and the flight control command is obtained through the cognitive algorithm, such as hovering, bypassing, or continuing to execute the route.
"Tianmu" system schematic
The binocular obstacle avoidance module gives the plant protection drone the ability to sense the location of the environment. The terrain vision module allows the drone to no longer rely on GPS signals for location and flight information. During the operation of the drone, if it encounters magnetic field interference or sudden loss of GPS signal, it can also hover accurately and even continue to fly the route. According to the Feifei engineer: "This technology is of great significance. Before that, the technology that can provide all-weather navigation for the aircraft was only GPS, and the GPS and geomagnetic compass signals were easily interfered, resulting in flight accidents."
Taking into account the complex plant protection environment, Extreme Flying uses the “wind curtain blocking technology†in the Tianmu system to ensure the lens is clean and ensure that the optical equipment continues to work normally in dusty and pesticide environments. Just as camels have long evolved double-layered eyelids and thick eyelashes in the desert environment, Feifei uses a high-pressure wind field to block foreign matter such as dust and pesticide droplets from entering the lens.
It is said that due to the high temperature during the summer day, the pests occur more frequently at night, and the planting operations of the extremely flying P20 drones are often carried out at night. For this reason, the "Tianmu" system also has night vision capability. Based on the active near-infrared illumination technology, the "Tianmu" allows the drone to sense the environment and avoid obstacles while working at night.
On the 24th, the replacement product MG-2 of the Dajiang MG-1 plant protection drone will also be released, and the scientific competition for agricultural drones is about to begin. What advanced technology will make the agricultural revolution look like?
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