Multi-line laser radar equipment and light emitting power control method

Abstract

The invention provides a multi-line laser radar device and a light output power control method, the multi-line laser radar device comprises a plurality of laser emission assemblies, a plurality of laser receiving assemblies, an emission signal selection circuit, a receiving signal selection circuit, a controller and a feedback regulation circuit, the controller selects and drives the corresponding laser emission assemblies, and the feedback regulation circuit drives the corresponding laser emission assemblies. Echo signals of the corresponding receiving channels are obtained through the correspondingly-arranged laser receiving assemblies and the receiving signal selection circuit, the feedback adjusting circuit carries out signal processing on the echo signals, and high-voltage driving signals with the pulse width negatively correlated with the pulse width of the echo signals are output to the corresponding laser emitting assemblies. The output power of the laser pulse is automatically adjusted for objects to be measured with different reflectivity, the amplitude of the echo signal is ensured to be within a preset range, the stability of the echo signal is improved, the signal distortion is reduced, and the ranging precision is effectively improved while the laser receiving assembly is protected.

Description

technical field [0001] The invention belongs to the technical field of laser radar, and in particular relates to a multi-line laser radar device and a light output power control method. Background technique [0002] Multi-line laser radar emits multiple laser beams from multiple laser transmitters to obtain the distance information of the object to be measured. The basic principle is to obtain the distance, etc. information. [0003] In the prior art, in order to maximize the detection distance, the laser light output power of each beam of the multi-line lidar is often maintained at a maximum fixed value, but in the actual detection environment, for close-range high-emissivity objects, the reflection to the laser detector The laser energy is strong, which is easy to cause certain irreversible damage to the laser detector. At the same time, the high-intensity laser echo is converted to an electrical signal, which is likely to cause signal distortion and affect the timing acc...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-line laser radar device, which aims to solve the problems of laser detector damage and signal distortion caused by the fixed laser power of the traditional multi-line laser radar device

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