Underwater target detection method based on laser-induced sound

Abstract

The invention relates to an underwater target detection method based on laser-induced sound, which belongs to the technical field of underwater target detection. The method comprises the following steps that a detector is arranged underwater, wherein the detector comprises a hemispherical bowl-shaped reflection shell and a plurality of beam expanding and focusing devices; a master control upper computer is used for controlling a laser device to emit laser signals, a beam splitter is used for dividing the laser signals into multiple beams of split laser signals, the split laser signals are transmitted to a beam expanding and focusing device and are converged at the sphere center position of a reflection shell through the beam expanding and focusing device, and water generates an optical breakdown effect at the sphere center position to generate sound wave signals; the inner surface of the reflection shell reflects a sound wave signal sent towards the reflection shell; the hydrophone is used for collecting sound wave signals reflected by the underwater target object and uploading the sound wave signals to the master control upper computer. Underwater target detection is realized by generating a high-directivity plane wave laser-induced sound signal, and the directivity of underwater target detection is enhanced.

Description

technical field [0001] The invention belongs to the technical field of underwater target detection, in particular to an underwater target detection method based on laser-induced acoustics. Background technique [0002] With the continuous development and progress of military modernization technology, the environment of naval underwater operations has become more and more complex. Underwater advanced submarine noise reduction technology and many new unmanned underwater vehicle technologies have developed rapidly. The traditional underwater guidance system has been It cannot meet the trend and general environment of today's information warfare, especially the technical application problems of underwater detection and guidance equipment such as detection range, accuracy, and anti-complex background interference are becoming more and more prominent. [0003] At present, there are mainly two methods of underwater target detection: optical detection and acoustic detection. Among ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the existing laser-induced acoustic underwater target detection technology, the present invention provides a laser-induced acoustic-based underwater target detection method, which realizes underwater target detection by generating highly directional plane wave laser-induced acoustic signals. Target detection, which can solve the technical problem of poor directivity existing in the existing laser-induced acoustic underwater target detection technology

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