Detection system and detection method for aquatic dynamic target trail based on laser facula drift

Abstract

The invention discloses a detection system and a detection method for aquatic dynamic target trail based on laser facula drift. The detection system comprises a laser, a CCD device and a signal processor. During use, the system is placed in water; the laser produces a unidirectional Gaussian beam; the CCD receives facula information; and the signal processor carries out the real-time treatment on the output of the CCD, and the detection of the aquatic dynamic target trail is realized through the detection of the drift amount of the laser facula. The method comprises the following process: 1, measuring the drift amount of the laser facula for a plurality of times in a laboratory environment, and giving the standards for judging whether the target trail exists or not and the range for judging the target trail characteristics; and 2, carrying out the real-time measurement of the facula drift amount in a real water area, and comparing the sample average and sample variance of a plurality of times of the measured facula drift amount with the judgment standards and the judgment range so as to judge the existence and the characteristics of the target trail. The invention has the advantages of high detection precision and long detection distance and can be applied to the distant precise detection of surface vessels and underwater vehicles.

Description

technical field [0001] The invention relates to the application field of laser technology, specifically, the detection of the wake of dynamic targets in water is realized by detecting the change of optical characteristics when the laser is transmitted in water, and can be used for surface ship tracking, underwater dynamic target detection, underwater weapon self-guidance and Design of underwater vehicles. Background technique [0002] With the development of marine resources and the increasing awareness of coastal defense in various countries, the detection and tracking of dynamic targets in seawater has become an important research topic. In addition to the traditional acoustic detection methods, underwater detection methods, optical detection methods, infrared detection methods and electromagnetic detection methods have also appeared. [0003] Acoustic detection is divided into active acoustic detection and passive acoustic detection according to whether the detection dev...

AI Technical Summary

Problems solved by technology

However, due to the absorption and scattering of the laser light by air bubbles and impurities in the water, the laser intensity fluctuates greatly. Therefore, the method of detecting targets by using light intensity changes has poor accuracy and cannot be used practically.

However, the method of using the scattering characteristics of light to detect the target will have the problem that the light scattering space spectrum cannot be detected when there are few bubbles or turbulent flow in the target trail, and it cannot meet the long-distance detection of the detection target.

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