What is lidar?

Correlation of lidar autopilot

Lidar is a radar system that emits laser beams to detect the position and speed of targets. Its working principle is to transmit a detection signal (laser beam) to the target, and then compare the received signal reflected from the target (target echo) with the transmitted signal. After proper processing, we can obtain the relevant information of the target, such as the distance, azimuth, altitude, speed, posture and even shape of the target, so as to detect, track and identify the targets such as airplanes and missiles.

The key function of automobile lidar is automatic driving.

Laser radar is mainly used in multi-vehicle wiring harness in automobiles, which can help automobiles identify the natural environment on the road, plan the driving route independently as a whole, and control automobiles to achieve the predetermined overall goal.

For example, according to the turn-back time after the laser hits an obstacle, the comparison distance between the whole target and itself can be calculated, and it can also assist the vehicle identification system in street corner and orientation.

Advantages and disadvantages of lidar

First, advantages

1, high resolution

Lidar can obtain extremely high angular resolution, velocity resolution and range resolution. Generally, the angular resolution can reach a resolution distance of more than 3km, and two objects with a distance of 0.3 m can track multiple targets at the same time. The velocity resolution can reach within 10m/s; The range resolution can reach about 0. 1 meter.

2, strong anti-interference ability

Second, shortcomings.

Vulnerable to bad weather.

This technology is still immature.