Three-dimensional and solid-state laser radar device and system

Abstract

The invention provides a three-dimensional and solid-state laser radar device and a system. The line source generating module emits a line source that diverges in the horizontal direction; a MEMS (Micro-Electro-Mechanical System) galvanometer achieves the scanning of line sources in the vertical direction; an area array photoelectric sensor receives reflected light; and a corresponding row pixel group receives the reflected light in turn, when the line source scans in the vertical direction. According to the three-dimensional and solid-state laser radar device, the embodiment of the inventioncombines the line source and the MEMS galvanometer to form a scanned surface light source, so that the strength requirement of the light source is met; meanwhile, the reflected light is received through a row pixel group, so that the anti-interference degree of the distance measurement and the accuracy of the ranging is improved; and the device is simple in structure, and is easy to process.

Description

technical field [0001] The invention relates to the technical field of laser radar, in particular to a three-dimensional solid-state laser radar device and system. Background technique [0002] In recent years, laser detection technology has been widely used in industrial fields such as measurement, protection, and unmanned driving due to its advantages such as high detection accuracy and strong environmental anti-interference ability. At present, the lidar with large receiving field of view adopts a mechanical rotation structure, uses a narrow field of view laser pulse light source and a flexible scanning device to scan the measured object point by point, and restores the data to the distance image of the target in sequence. When performing three-dimensional scanning, two-dimensional scanning is required, the structure is complex, the cost is high, and the resolution is not high. So solid-state radar came into being. There are no macroscopic or microscopic moving parts in...

AI Technical Summary

Problems solved by technology

Among them, the area array phased array uses multiple light sources to form an array. By controlling the time difference between the emission of each light source, a flexible and precisely controllable main beam can be synthesized, but it is easy to form side lobes and the processing is difficult, and the manufacturing process is relatively difficult. , which is still in the laboratory stage

FLASH solid-state radar can be divided into two-dimensional lattice FLASH and three-dimensional surface array FLASH according to the scanning dimension. In the invention patent CN201810227818, it is proposed that multiple emission components splicing spots and one MEMS for two-dimensional scanning. The technical difficulty and scanning efficiency are relatively large. , and only increases the scanning field of view angle in the splicing direction; the invention patent CN201711082437 proposes an array of laser light sources to emit light sequentially, and scan with the entire array of APDs, the scanning efficiency is not high, and the distance measurement consistency between light sources is difficult to guarantee

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