Laser radar geometric overlap factor automatic regulation system and regulation method

Abstract

The invention discloses a laser radar geometric overlap factor automatic regulation system which comprises an outgoing light path, a receiving light path and a data acquisition and control part. A regulation method comprises the following steps: a pulse laser sends out a pulse laser beam, the pulse laser beam is collimated and expanded by a collimating and expanding system and is reflected into the atmosphere so as to produce echoed signals after steering by a rotatable reflector and a fixed reflector, a telescope receives the echoed signals, and the echoed signals sequentially passes through a pinhole aperture, a lens and a light filter to be transferred to a photoelectric detector and the data acquisition and control system; and the echoed signals are processed according to equivalent criteria and an optimization algorithm to obtain control signals to control an X-axis executing mechanism and a Y-axis executing mechanism to regulate the angle of the rotatable reflector so as to enable the axial line of the outgoing laser beam reflected by the mixed reflector to coincide with the axial line of the telescope. The regulation system and the regulation method can automatically regulate the angle of the outgoing laser beam, reduce the influence of geometric factors on the atmospheric echoed signals and widen the effective detection range of the laser radar.

Description

technical field [0001] The invention belongs to the technical field of atmospheric environment observation, and in particular relates to an automatic adjustment system for laser radar geometric overlapping factors, and also relates to an adjustment method using the system. Background technique [0002] As an active remote sensing detection tool, lidar has been widely used in research fields such as laser atmospheric transmission, global climate prediction, aerosol radiation effects, and atmospheric environment. [0003] In a lidar system, the field of view of the telescope should be slightly larger than the divergence angle of the laser beam. For coaxial lidar, the axis of the outgoing laser beam should coincide with the axis of the telescope; for non-coaxial lidar, the axis of the outgoing laser beam should be parallel to the axis of the telescope. Ideally, the echo signal can completely enter the field of view of the telescope from the ground. [0004] However, it is oft...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of lidar geometric overlap factor automatic adjustment system, has solved the existing mode that adopts manual adjustment, or adopts the method for experiment, program correction to reduce the impact of geometric overlap factor on the echo signal of lower atmosphere, The effect is not ideal and the degree of automation is not high

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