Oceanic turbulence parameter non-contact measuring method and system

Abstract

The invention discloses an oceanic turbulence parameter non-contact measuring method, which includes steps of: obtaining an oceanic turbulence remote sensing image by an imaging system; processing the obtained image to obtain a modulation transfer function of the turbulence; and inverting the modulation transfer function of the turbulence, obtained through measurement, so as to obtain structural parameters of the oceanic turbulence. The invention further discloses an oceanic turbulence parameter measuring system on basis of laser imaging, which includes the imaging system, wherein the imaging system includes a pulse laser transmitter system, a striped target board and a receiver system; the pulse laser transmitter system is used for producing optical waves with homogeneous energy distribution; the striped target board is arranged opposite to the pulse laser transmitter system, and the optical waves pass through the to-be-tested oceanic turbulence and are reflected when arriving at the target board; and the reflected optical waves are received and collected by the to-be-tested oceanic turbulence after passing through the to-be-tested oceanic turbulence, as a result, the remote sensing image information of the oceanic turbulence is obtained. Through laser imaging, the method and the system can detect the structure parameters of the oceanic turbulence on the premise of not damaging the structure of the oceanic turbulence.

Description

technical field [0001] The invention relates to the field of ocean turbulence parameter measurement, in particular to a method and system for non-contact measurement of ocean turbulence parameters. Background technique [0002] In recent years, underwater imaging detection has been widely used in various fields such as underwater target detection and underwater topography observation, providing a powerful research method for human beings to study marine organisms and the marine environment. However, most of the current reports on laser imaging distance and image quality are obtained under controlled static water conditions in a laboratory environment. For laser imaging detection under complex ocean conditions, it is not only difficult to achieve the maximum detection distance under static water conditions, but also the impact mechanism of image quality is also different. In a real ocean environment, turbulence becomes an important factor affecting the distance and image qua...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: 1. The use of temperature fluctuation method to detect ocean turbulence has certain limitations

First of all, the influence of ocean turbulence is more complicated. The refractive index of water is related to density, temperature, pressure, salinity and wavelength, and it cannot be replaced by the single influence of temperature; secondly, the spatial distribution rate and time distribution rate of this temperature fluctuation method are limited. , the size of ocean turbulence is widely distributed from mm to km, and the temperature fluctuation method cannot meet the requirements when measuring small-scale turbulence; third, the principle of the temperature fluctuation method makes it inevitable that it will cause certain disturbances to the turbulence structure , which brings inevitable errors to the detection work

[0005] At present, there are also optical methods, especially the method of measuring turbulent structure parameters by laser, which have the advantages of high precision, no damage to turbulent structure and continuous detection, but the existing turbulent optical methods are all used to detect The detectors of atmospheric turbulence, the influencing factors of atmospheric turbulence and ocean turbulence are very different, and the parameters that characterize the turbulent structure are also different, so the same method cannot be used in the measurement method and data processing method, and because there are The light window of 470-580nm is not suitable for the detection of ocean turbulence

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