A modeling method of ocean-lower atmosphere laser transmission under the influence of complex environment

Abstract

The invention discloses an ocean-low-layer atmospheric laser transmission modeling method under the influence of a complex environment, comprising the following steps: dividing the transmission process of laser detection of underwater targets into a low-level atmospheric transmission sub-process, a sea surface transmission sub-process, and a sea body transmission Sub-process; determine the environmental factors and characteristic parameters in each sub-process; establish the laser attenuation coefficient model of the lower atmosphere in complex environment, the mathematical model of sea-air interface laser transmittance in complex environment, and the mathematical model of laser sea water attenuation coefficient in complex sea environment ; Synthetically establish the ocean-lower atmosphere laser transmission model under the influence of complex environment. The present invention deeply synthesizes the mechanism of the coupling of various factors on the laser light path and energy attenuation in complex atmospheric and oceanic environments, establishes a complete transmission model for the whole process of blue-green laser detection in complex environments, and provides a new type of aerial platform for underwater targets. The research and development of laser detection equipment provides theoretical support.

Description

Technical field [0001] The invention relates to the fields of environmental modeling and simulation and laser detection, and more particularly relates to an ocean-lower atmosphere laser transmission modeling method under the influence of complex environment. technical background [0002] In recent years, various non-acoustic detection technologies have developed rapidly, and the non-acoustic detection methods of magnetic, infrared, laser, visible light, radar and other physical fields account for an increasing proportion of underwater target detection. Among them, optical detection technologies such as laser and visible light have become an important development direction of non-acoustic detection technology at present because of their advantages of imaging, orientation, low delay and combination of active and passive. [0003] Blue laser detection of underwater targets is one of the research hotspots of laser detection technology. The working band of blue laser is 450 nm ~ 550 n...

AI Technical Summary

Problems solved by technology

[0007] 1. During the transmission of the laser in the lower atmosphere, it is absorbed and scattered by atmospheric molecules and aerosol particles under different meteorological conditions such as rain, fog, and haze, and the mechanism of action is difficult to model;

[0008] 2. The incident and exit of the laser at the ocean-atmosphere interface are affected by the dynamic characteristics of sea wind and waves on the sea surface, resulting in the uncertainty of the transmission optical path and the corresponding energy loss, and the mechanism analysis is complicated;

[0009] 3. Various types of suspended matter in seawater have a great influence on the direction and intensity of the lidar detection echo signal, and the influence process is complicated

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