"There are so many drones in the world, why did you buy this one?" If someone asks such a question, after reading this article, maybe you will throw a professional counter-question next time: "You know more about the rotor. Is the structure of the drone?" Understanding the structure of a multi-rotor drone is a great help for purchasing, following, and maintaining. Today we will take the Dajiang Elf Phantom 4 PROV2.0 as an example to introduce the structure of the current mainstream multi-rotor UAV. Dajiang Elf Phantom 4 Pro V2.0 is a mid-to-high-end UAV released by Dajiang in May 2018. Compared with the previous models, the IntelliSense system, the image transmission system and the imaging system have been comprehensively improved. It is the strongest model in this class of drones. The rack of the drone refers to the carrying platform of the drone, and all the equipment of the drone is mounted on the bracket, and the bracket also determines that the drone is a few rotor drones. The excellent frame design makes the other components easy to install, stable and stable, and easy to disassemble. At present, the racks of general personal application drones are integrated inside the fuselage. The flight control is the flight control system of the drone. Whether the drone automatically maintains the flight state (such as hovering) or our human operation on the drone, the flight control system adjusts the drone power system in real time. achieve. In addition to ensuring the normal navigation function of the aircraft, some high-order flight control systems also have kinetic energy such as safety redundancy, flight data recording, flight parameter adjustment and automatic flight optimization. * The fault-tolerant control system of Dajiang A3 flight control can automatically stabilize the flight attitude even when the six-axis or eight-axis aircraft has power failure. As the name suggests, the power system is to power the drone. At present, the power system of the civil multi-rotor UAV is basically electric, and the motor, the ESC and the propeller are included. In daily applications, we should pay more attention to the inspection and maintenance of the power system, such as the timely inspection and replacement of the propeller blades, and the waterproof and moisture-proof parts of the motor. The batteries used by drones are now high-energy density lithium-polymer batteries, and the new drone models can reach nearly 30 minutes of battery life. * The smart battery built-in power management system on the Phantom 4 Pro V2.0 protects the battery from charge and discharge, ensuring safer and longer-lasting use. . Early drones basically had no or only simple positioning sensors. From the Dhan Phantom 4, advanced sensors and computer vision technology were integrated, and the front-view obstacle sensing system brought the era of intelligent flight. Nowadays, an advanced sensor system has become one of the configurations of the new generation of drones, which makes our flight operations simpler and smarter. *Phantom 4 Pro V2.0's FlightAutonomy system has been fully upgraded with 5-way sensing and 4-way obstacle avoidance. In the early RC era, the main function of the remote control was to operate the flight of the drone. In addition to controlling the flight attitude of the drone, the current remote control is also responsible for controlling the shooting operation and real-time image transmission connected to the ground. The American hand, the Japanese hand and the Chinese hand that have continued from the model era can be changed on the APP side. High-end or professional users will also be equipped with dual remote controls to operate both flight and shooting. *Phantom 4 Pro V2.0 is equipped with an integrated remote control that integrates a 5.5-inch 1080P high-brightness display with a maximum brightness of 1000cd/m2. The PTZ camera is actually said to be a more stable PTZ plus camera unit. It may be more accurate. Early UAVs or some of the large six-axis and eight-axis UAVs are mainly used for separate stabilization and camera units. The combination, and the Dajiang Elf 2 Vision+ was born for the first time to combine the drone, the three-axis stabilization gimbal and the camera. The PTZ camera module is more compact, so most of the models for the individual drones are now integrated. PTZ camera. *Phantom 4 Pro V2.0 The PTZ camera is equipped with a 1-inch 20-megapixel CMOS image sensor and a mechanical shutter that can be used as a flying micro-camera. As we all know, when using drones for aerial photography, image transmission is one of the most important factors affecting aerial photography. Excellent wireless image transmission technology has the characteristics of long transmission distance, stable transmission, clear and smooth image, anti-interference, anti-blocking and low delay. Take Phantom 4 Pro V2.0 as an example, it uses a new generation of OcuSync image transmission, can provide 720p/1080p clear and smooth image transmission, and supports 2.4G & 5.8G dual-band communication, image transmission and control distance of up to 7 kilometers. *2.4G & 5.8G dual-band communication, image transmission and control distance up to 7 km. FCC/CE/SRRC are American/European/National Standards respectively, indicating that the distance will be different in different countries. Different from traditional FR-4 (plastic), ceramic materials have good high-frequency performance and electrical properties, and have properties that organic substrates do not have, such as high thermal conductivity, excellent chemical stability and thermal stability. Ideal packaging material for large scale integrated circuits and power electronic modules. 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