Sea-lower atmosphere laser transmission modeling method under complex environment influence

Abstract

The invention discloses a sea-lower atmosphere laser transmission modeling method under a complex environment influence. The method comprises the following steps of dividing a transmission process where a laser detects a target under sea into a lower atmosphere transmission sub-process, sea surface transmission sub-process, and a sea-body transmission sub-process; determining environmental factorsand characteristic parameters in sub-processes; establishing a laser lower atmosphere attenuation coefficient model in a complex environment, a sea-air interface laser transmittance mathematical model in the complex environment, and a laser seawater attenuation coefficient mathematical model in a complex sea body environment; and comprehensive establishing a sea-lower atmosphere laser transmission model under the complex environment influence. An action mechanism of coupling of various factors on a laser light path and energy attenuation in a complex atmospheric marine environment is deeply integrated, a whole process transmission model of blue-green laser detection in the complete complex environment is established, and a theoretical support is provided for research and development of anew aerial platform to underwater target laser detection equipment.

Description

technical field [0001] The invention relates to the field of environmental modeling and simulation and the field of laser detection, and more specifically, to a modeling method for ocean-lower atmosphere laser transmission under the influence of complex environments. Background technique [0002] In recent years, various non-acoustic detection technologies have developed rapidly, and multi-physics non-acoustic detection methods such as magnetism, infrared, laser, visible light, and radar have become more and more important in the detection of underwater targets. Among them, optical detection technologies such as laser and visible light have become an important development direction of current non-acoustic detection technology due to their advantages such as imaging, orientation, low delay, and active-passive combination. [0003] Blue-green laser detection of underwater targets is one of the current research hotspots in laser detection technology. The working band of the bl...

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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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