Laser radar coaxial detection system and automatic calibration method therefor

Abstract

The invention discloses a laser radar coaxial detection system and an automatic calibration method therefor, and the system comprises an industrial control computer, a laser, a beam expanding lens (1), a double-optical-wedge adjuster (2), a 45-degree plane reflector (3), a 45-degree plane reflecting prism (4), a corner reflector (5), a receiving telescope (6), an aperture diaphragm (7), a collimating mirror (8), and a CCD camera. The laser is controlled by the industrial control computer to emit a laser beam with certain energy, and the laser beam sequentially passes through the beam expanding lens (1), the double-optical-wedge adjuster (2), the 45-degree plane reflector (3) and the 45-degree plane reflecting prism (4). A light beam signal reflected by the corner reflector (5) passes through the receiving telescope (6) to be focused on the aperture diaphragm (7), and then passes through the collimating mirror (8) to be received by the CCD camera. The system employs target calibration, and the signal is received by the CCD camera. A deflection angle value is calculated through a formula, and is fed back to a computer for controlling the double-optical-wedge adjuster (2) to carry out angle adjustment. The system is convenient, is not affected by an external environment, shields human errors through employing the digitalization technology, and can obtain higher precision.

Description

technical field [0001] The invention belongs to the technical field of laser radar, and specifically relates to a laser radar coaxial detection system and an automatic calibration method. The system analyzes the optical axis angle value received by a CCD, and controls the rotation angle of a double optical wedge regulator to achieve automatic calibration. the goal of. Background technique [0002] The laser radar system can monitor parameters such as atmospheric aerosol backscatter coefficient, atmospheric extinction coefficient, atmospheric particle mass concentration, and atmospheric boundary layer height in real time. With my country's emphasis on environmental pollution, laser radar is developing atmospheric science, atmospheric It plays an increasingly important role in the fields of climatology and atmospheric environmental science. At present, most laser radar systems adopt the coaxial method of transmitting and receiving devices, and the system mainly includes a tran...

AI Technical Summary

Problems solved by technology

[0004] Most of the current coaxial adjustment methods are technicians who use sophisticated optical instruments to perform fine adjustment operations. This method has poor human error and accuracy.

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