Current Situation and Application of Airborne LiDAR

May 09, 2023

Although laser technology has not been around for a long time since it came out, it has several extremely valuable features such as high brightness, high directionality, high monochromaticity and high coherence, and is widely used in national defense, military, industry and agriculture. It is widely used in production, medical health and scientific research.

Applications

1. Military applications

At present, great achievements have been made in mine detection lidar, chemical reagent detection lidar, atmospheric monitoring lidar, and biochemical land warfare lidar. In addition, China's attack laser radar is quite advanced, including the world's most cutting-edge five core technologies: breakthroughs in laser material research, breakthroughs in the physical mechanism of laser radiation materials and imaging maps, breakthroughs in one-time fast tracking and positioning control technology, Breakthroughs in high-density energy reversible conversion carrier materials, and breakthroughs in laser imaging technology.

2. Application of wind measurement

LiDAR has high resolution, high precision, large detection range, and the ability to provide three-dimensional wind field information under clear sky conditions. Wind lidar uses the Doppler effect of light, mainly in two ways: coherent (heterodyne) detection and incoherent (direct) detection.

3. Meteorological applications

The national sandstorm monitoring network can find out the exact source of sandstorms through joint research of advanced observation, simulation and satellite remote sensing, and scientifically distinguish the effects of natural factors such as meteorological and climatic conditions and human factors such as the increase of desertified land on sandstorms. It provides a scientific basis for accurate early warning and forecasting of sandstorms, and formulation of comprehensive and efficient prevention and control plans.

4. Application in soil and water conservation monitoring

Due to the impact of construction and development, it is very difficult to control water and soil erosion. According to the survey, the area of water and soil erosion due to development and construction in the whole country reaches more than 1.00×104 square kilometers every year. Because the measurement accuracy of laser radar is much finer than that of traditional methods, and it can reflect the shape of the measured site in detail, and it is easy to realize three-dimensional modeling, thus realizing non-contact measurement, greatly reducing the workload of the field and reducing the out of danger.