Inclined 45-degree laser radar scanning light path error compensation method

Abstract

The invention discloses an oblique 45-degree laser radar scanning light path error compensation method. The method comprises the following steps: acquiring coordinates of four or more than four groups of targets in a coordinate system of an oblique 45-degree laser radar; calculating an incident laser error angle by using the Z-axis coordinate of the targets; calculating an incident error by using the incident laser error angle, and calculating a reflection error angle by using the incident error; and calculating the scanning section of the corrected oblique 45-degree laser radar by using the incident laser error angle and the reflection error angle. Errors of the scanning equipment in production and installation links are made up through an algorithm, so that scanned data are more accurate, and various later applications are facilitated.

Description

technical field [0001] The invention relates to a method for compensating the error of an oblique 45° lidar scanning light path. Background technique [0002] Lidar is a radar system that emits laser beams to detect characteristic quantities such as the position and speed of targets. Its working principle is to send a detection signal (laser beam) to the target, and then compare the received signal (target echo) reflected from the target with the transmitted signal, and after proper processing, the relevant information of the target can be obtained, such as Target distance, azimuth, height, speed, attitude, and even shape parameters, so as to detect, track and identify aircraft, missiles and other targets. It consists of a laser transmitter, an optical receiver, a turntable and an information processing system. The laser converts electrical pulses into optical pulses and emits them. The optical receiver then restores the optical pulses reflected from the target into electri...

AI Technical Summary

Problems solved by technology

Common reflective mirrors in the reflective scanning system include polygonal mirrors and elliptical mirrors (oblique 45° mirrors). Polygonal mirrors have a small scanning field of view, which is not conducive to large-scale scanning

The design of the optical scanning device needs to consider issues such as the system field of view, scanning speed, aperture, angle measurement requirements, and rotational balance, which are difficult to achieve with existing technologies.

Images