Scanner and coaxial and non-coaxial radar systems using same

Abstract

A scanner and coaxial and non-coaxial radar systems using the same belong to the technical field of laser radars, and the scanner comprises a wafer substrate, a plurality of optical switches and a plurality of grating antenna groups; the plurality of optical switches and the plurality of grating antenna groups are fixedly arranged on the upper end surface of the wafer substrate; the plurality of optical switches are in one-to-one correspondence with the plurality of grating antenna groups. Namely, one grating antenna group is electrically connected with one optical switch. The plurality of grating antenna groups are distributed in an array to form a grating part; a lens module is movably arranged on the upper side of the grating part; secondly, two-dimensional scanning is carried out through the scanner; three-dimensional imaging is realized and the detection precision is improved by combining the distance information calculated by the system in the third dimension, noise is removed through joint participation of the optical amplifier and the grating antennas, the interference of the outside to a detection result is reduced, the detection distance is improved, and in addition, thesystem is integrated on the chip, the size is small, installation is simple and easy, and the cost reduction and the mass production are convenient.

Description

technical field [0001] The invention belongs to the technical field of laser radar, in particular to a scanner and a coaxial and non-coaxial radar system using the scanner. Background technique [0002] LiDAR is a sensor that uses laser light to detect and measure distances. Its principle is that the transmitting device emits laser light to the target, and the receiving device measures the delay and intensity of the returning laser light to measure the distance of the target. [0003] The current laser radar includes mechanical scanning laser radar, Flash laser radar, Mems scanning laser radar and OPA radar. The traditional mechanical laser radar uses a mechanical device to rotate and scan to obtain 360-degree point cloud information and construct a complete three-dimensional image. However, due to the slow mechanical scanning speed and low resolution, the obtained 3D image cannot completely present small objects. Secondly, the mechanical scanning laser radar is relatively ...

AI Technical Summary

Problems solved by technology

[0003] The current laser radar includes mechanical scanning laser radar, Flash laser radar, Mems scanning laser radar and OPA radar. The traditional mechanical laser radar uses a mechanical device to rotate and scan to obtain 360-degree point cloud information and construct a complete three-dimensional image. However, due to the slow mechanical scanning speed and low resolution, the obtained 3D image cannot completely present small objects. Secondly, the mechanical scanning laser radar is relatively large in size and assembled with multiple wire harnesses, which leads to higher production costs; Flash LiDAR has a relatively short ranging distance, and the accurate measurement distance is 10M-20M. Mems scanning LiDAR has poor stability during use, and the Mems used cannot meet the vehicle regulations. The risk of long-term use is high, and the price of a single Mems is high;

[0004] OPA radar is expensive to manufacture and difficult to industrialize

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