Onboard 3D imaging solid state laser radar system

Abstract

The invention discloses an onboard 3D imaging solid state laser radar system, and relates to the field of onboard laser radars. The system herein can address the technical problems of slow scanning, large size, low receiving signal to noise ratio and low safety factor of conventional mechanical scanning laser radars. The system herein includes a laser device, a plurality of TR assembles and a central processing unit. The laser device includes an optoisolator, a pre-amplifier, a beam splitter, a main amplifier array, and a beam expanding collimated light path. Each TR assembly includes a transmitting system and an echo receiving system. The transmitting system includes a unidirectional glass array and a liquid crystal polarized grating array. The echo receiving system includes an optical filter array, a gathering lens array photoelectric detector array and a plurality of playback circuits. According to the invention, a radar has no mechanical rotary parts, which can greatly reduce the size of a laser radar system; a single TR assembly has no processor, and all the TR assemblies are under uniform control of a central processing unit of the laser radar system, which facilitates integration; and the arrangement of the plurality of TR assemblies can cover a 360 degree horizontal field of view and a 20 degree vertical field of view.

Description

technical field [0001] The invention relates to the field of vehicle-mounted laser radar, in particular to a solid-state laser radar system for vehicle-mounted three-dimensional imaging. Background technique [0002] With the continuous improvement of people's requirements for car driving and the development of social technology, unmanned driving has become a major change direction for the automotive industry. As the core key technology of the unmanned driving system, the vehicle-mounted lidar transmits a detection signal (laser beam) to the target, compares the received signal (target echo) reflected from the target with the transmitted signal, and after appropriate processing, Obtain information such as roads, vehicle location, and obstacles around the vehicle, so that the unmanned driving system can intelligently and autonomously control the steering and speed of the vehicle, reliably drive on the road, and reach the intended destination. [0003] The traditional mechani...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a vehicle-mounted three-dimensional imaging solid-state laser radar system for solving the technical problems of slow scanning speed, large volume, low receiving signal-to-noise ratio and poor safety factor of the existing traditional mechanical scanning laser radar.

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