Autonomous vehicles use inertial, GNSS, laser radar, millimeter-wave radar and other sensors to sense the vehicle surroundings and its own attitude and position, and according to the perception of the road and obstacles information, to control the vehicle's steering and speed, so that the vehicle can drive safely and reliably in the road or specified area (airport, port, park, etc.). Autonomous driving is an intelligent way of driving a car, which can also be called mobile robot. It mainly relies on the computer system in the car as the driving force to achieve unmanned driving.