Hyper-spectrum laser radar system and control method thereof

Abstract

The invention discloses a hyper-spectrum laser radar system and a control method thereof. The hyper-spectrum laser radar system comprises a light source subsystem, a light receiving subsystem, a signal collecting subsystem and a signal processing subsystem, wherein the light source subsystem is used for providing lasers with a set frequency as detection light and laser radar dominant waves, the light receiving subsystem is used for receiving echoes with the set frequency, the signal collecting subsystem is used for collecting the laser radar dominant waves and the echoes and conducting sampling, and the signal processing subsystem is used for determining whether the set frequency is changed according to the echoes and acquiring information of a detection target based on the laser radar dominant waves and the echoes. According to the hyper-spectrum laser radar system and the control method thereof, a laser device adjustable in beam frequency is adopted, the beams with the set frequency are selected as the detection light, the echoes are received, the detection result is acquired, and interference, caused by frequency equality, between laser radar systems is avoided.

Description

technical field [0001] The invention relates to the technical field of laser radar, in particular to a hyperspectral laser radar system capable of outputting multiple frequency laser beams and continuously adjustable beam frequency in automatic driving and a control method thereof. Background technique [0002] Existing laser radar devices can detect single-frequency laser echoes, and the distance information between the measured point of the target and the laser radar system can be calculated by measuring the flight time of the laser pulse. However, the disadvantage of the traditional laser radar system is that it can only emit a single-frequency laser and detect and receive laser echoes. The detection spectrum is limited by the output frequency of the laser light source, and the frequency of the emitted laser beam cannot be changed according to requirements. [0003] At present, most of the autonomous driving uses the traditional lidar system. The application of laser rad...

AI Technical Summary

Problems solved by technology

However, the disadvantage of the traditional laser radar system is that it can only emit a single-frequency laser and detect and receive laser echoes. The detection spectrum is limited by the output frequency of the laser light source, and the frequency of the outgoing laser beam cannot be changed according to requirements.

But the disadvantage is that when more than one platform (vehicle or flying object) is equipped with the same type of lidar for automatic driving, the frequencies of the outgoing beams of the lidar are the same, and they will interfere with each other. The laser echo may not be emitted by its own system, and the distance information obtained from it will produce errors, causing misjudgment by the autopilot system

[0004] Some research institutions use laser radar systems with different frequency output beams on the autonomous driving platform. Although this can solve the problem of mutual interference between laser radar beams, when the number of autonomous driving platforms increases, more and more different systems will be required. LiDAR with Frequency Output Beam

However, the frequency of the output beam of the conventional laser radar is certain and only has a few special fixed values, and it is impossible to output the beam of any frequency.

Therefore, it cannot meet the needs of multiple autonomous driving platforms equipped with laser radars with different frequency beams

Images