LiDAR, a radar system that detects the position, speed, and other characteristic quantities of a target by emitting a laser beam, is mainly composed of transmitting system, receiving system, information processing and other parts. LiDAR has the characteristics of high accuracy, long range, strong anti-interference, independent of ambient light, etc. It can effectively sense the environmental situation both day and night, thus completely liberating many devices that originally relied highly on human monitoring and control.