How can millimeter-wave radar be used to avoid obstacles and prevent ground flight of UAV?

Millimeter wave radar can avoid obstacles well in UAV sensing system. Millimeter wave radar has the characteristics of high sensitivity, strong stability and long detection range, which basically meets the requirements of UAV for power consumption, detection range and real-time performance. When the distance between the UAV and the obstacle is less than the safe distance, the millimeter-wave radar can accurately detect relevant data and transmit the acquired data instantly to the flight control system.

With the development of economy and the continuous progress of science and technology, the application of UAV plant protection in agricultural life is more and more extensive. Compared with traditional spraying methods, UAV operational spraying has the advantages of high efficiency, high uniformity and less pesticide waste.

Millimeter-wave radar, that is, radar operating in the millimeter-wave band. Generally speaking, millimeter wave refers to electromagnetic waves in the 30-300GHz frequency domain (wavelength 1-10mm). Millimeter wave is located in the wavelength range where microwave and far infrared wave overlap, so millimeter wave has the advantages of both kinds of spectrum, as well as its unique properties. Millimeter wave has high resolution, good directivity, strong anti-interference ability and good detection performance. The atmospheric attenuation of millimeter wave is smaller than that of infrared wave, which is better for soot penetration and less affected by weather. Millimeter wave radar is suitable for moving target detection in complex ground environment and is mainly used for obstacle avoidance and ground defense flight of UAV.

Obstacle avoidance:

At present, the limited sensing ability of UAV is the biggest obstacle limiting the intelligent flight control system of UAV, which increases the risk of accidental collision of UAV.

Millimeter wave radar can avoid obstacles well in UAV sensing system. Millimeter wave radar has the characteristics of high sensitivity, strong stability and long detection range, which basically meets the requirements of UAV for power consumption, detection range and real-time performance.

Millimeter wave radar has a high data refresh rate, which can detect the information of surrounding obstacles in real time and avoid obstacles. When the distance between the UAV and the obstacle is less than the safe distance, the millimeter-wave radar can accurately detect relevant data and transmit the acquired data instantly to the flight control system. According to the data detected by the millimeter-wave radar, the flight control system timely makes braking, circling and other obstacle avoidance actions, effectively reducing the occurrence of flight stories and ensuring flight safety.

In terms of simulated flight:

Ground flight means that the UAV maintains a constant altitude difference with the target by setting a fixed altitude with the known three-dimensional terrain during its operation. With the function of ground imitation flight, the UAV can adapt to different terrain, automatically generate a higher route according to the terrain of the measured area, maintain the same ground resolution, so as to obtain better data effect. When we lack terrain and altitude data, we can rely on the ranging data of UAV millimeter wave radar to realize the imitation flight of UAV.

Compared with other sensors, millimeter wave radar has the perfect combination of high accuracy and stability. At the same time, millimeter waves can penetrate non-metallic materials, through dust, water fog and so on. , not affected by light, strong monitoring stability.

In the actual operation process, the UAV can not only detect the terrain trend in advance, guide the UAV to adjust its flight posture in advance, but also measure the relative height of the surface and obtain the information such as the change of terrain or vegetation height in real time.

In addition to agriculture, forestry and plant protection, drones can also be used in fields such as police safety, power inspection, disaster rescue and wildlife observation.

As the key sensor of UAV flight control system, millimeter wave radar is an important part of UAV technology development.