A solid-state array laser radar ranging method based on pseudo-random code modulation and demodulation

Abstract

The present invention provides a solid-state array laser radar ranging method based on pseudo-random code modulation and demodulation. Multiple solid-state array laser radars set different pseudo-random code modulation lights according to their respective encoding methods of reference pseudo-random codes, and due to The correlation between the pseudo-random code modulated light is extremely low, and the solid-state area laser radar is only sensitive to the pseudo-random code modulated light defined by itself when receiving the echo signal, so even if the echo signal includes other solid-state array laser radars The pseudo-random code modulated light of the solid-state array lidar can also accurately obtain the echo signal corresponding to its own pseudo-random code modulated light, so as to accurately obtain the distance between the solid-state array lidar and the obstacle, and realize multiple solid-state array laser radars. The array lidar works together without interfering with each other.

Description

technical field [0001] The invention belongs to the field of solid-state array laser radar, in particular to a solid-state array laser radar ranging method based on pseudo-random code modulation and demodulation. Background technique [0002] Solid-state array lidar refers to a device that performs non-contact ranging by the time-of-flight method. The principle of solid-state array lidar ranging is that the laser transmitter sends out a beam of modulated laser signals. The modulated light is reflected by the measured object / obstacle and then received by the area array detector. It can be achieved by measuring the phase difference between the emitted and received lasers. Calculate the distance to the target. [0003] However, in the application scenario where multiple solid-state array lidars work, using a single modulation signal, such as a sine wave modulation signal, signal crosstalk will occur between multiple solid-state array lidars, causing all solid-state array lidar...

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Problems solved by technology

[0003] However, in the application scenario where multiple solid-state array lidars work, using a single modulation signal, such as a sine wave modulation signal, signal crosstalk will occur between multiple solid-state array lidars, causing all solid-state array lidars to fail. unable to work properly

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