Long-distance advanced anti-submarine early warning array and system based on distributed optical fiber acoustic wave sensing

Abstract

The invention discloses a long-distance advanced anti-diving early warning array and a system based on distributed optical fiber acoustic wave sensing. The system comprises fixing units composed of anchors, subsurface buoys and mooring ropes; wherein sensing optical cables continuously extend vertically and horizontally along the fixing units to form a two-dimensional detection array plane on an offshore bottom layer, so that two-dimensional arrangement of the sensing optical cables in an xz plane in an approximate square wave signal manner is realized, and the system further comprises a seabed workstation, a buoy and a signal transmission cable; the reflected light signal of the sensing optical cables is demodulated to obtain the orientation, movement speed and direction information of adetection target, and the information is sent to the buoy and then sent back to a ground shore station through a satellite. According to the invention, the distributed optical fiber sound wave sensingtechnology is combined with the anti-submarine detection requirement; the all-fiber long-distance distributed underwater acoustic detection real-time early warning system laid along the border line of the sea is provided, early warning can be conducted on submarines invading the marine boundary of China in advance, the positions of the submarines can be accurately positioned in real time, the anti-diving detection cost is reduced, the anti-diving operation efficiency is improved, and the marine rights and interests of China are protected.

Description

technical field [0001] The invention relates to an anti-submarine early warning array and system, in particular to a long-distance advanced anti-submarine early warning array and system based on distributed optical fiber acoustic wave sensing. Background technique [0002] Submarines are important weapons and equipment in maritime military struggles, and can play an important role in operations such as anti-ship operations, covert reconnaissance, and search and rescue of one's own parachute pilots. Moreover, modern submarines can not only use weapons such as torpedoes and anti-ship missiles to attack surface ships, but also use weapons such as cruise missiles and ballistic missiles to attack deep inland targets. Important information such as hydrological data of important waters and ports of other countries, voiceprint characteristics of naval ships, etc. Today, the submarines of various countries have made great progress in indicators such as flexibility, concealment, and ...

AI Technical Summary

Problems solved by technology

Optical fiber hydrophones can effectively overcome the problems of traditional sonar systems that require a large number of underwater electronic components and signal transmission cables, are expensive, heavy, and poorly sealed, and improve the detection accuracy of underwater acoustic signals and the stability of the system

However, hydrophones are only suitable for local point detection under the sea, and ordinary optical fiber hydrophones are prone to optical system imbalances when they form a chain structure, which affects the detection performance of the system, and the requirements for system balance will greatly increase. The manufacturing cost and difficulty of production; for interferometric hydrophones, cascading sensors into a chain will weaken the signal and affect the detection effect

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