Method and system for searching and positioning underwater acoustic beacon

Abstract

The invention relates to a method and system for searching and positioning an underwater acoustic beacon, and belongs to the technical field of underwater target searching and positioning. The methodis implemented through dragging a towing system at a certain speed by a mother ship. The characteristics lie in that a search operation ship drags an underwater towing body to navigate or operate continuously at a certain speed by a tensile towing cable, the towing body is internally provided with a solid linear array to perform direction-finding and positioning on an underwater acoustic beacon signal, direction-finding and positioning data is transmitted to a computer on the search operation ship through the tensile towing cable, whether there is an underwater acoustic beacon signal or not isobserved through a software display interface of the computer, when an underwater acoustic beacon signal is searched, and the direction-finding orientation of the linear array and output coordinatesof on-board satellite positioning equipment are calculated so as to carry out positioning on an acoustic beacon to be searched. The invention has the beneficial effects that fast and large-scale search operation can be performed on an underwater acoustic beacon by using the method, the search efficiency is high, and the underwater acoustic beacon can be searched and positioned quickly, thereby wining the precious time for salvage in time. The method performs detection through adjusting the laying depth of the towing body in the water, and is not only applicable to the shallow sea but also canbe applied to the deep sea.

Description

technical field [0001] The invention belongs to the technical field of underwater target search and positioning, and relates to a search and positioning method and system for underwater acoustic beacon signals, in particular to a method for searching and positioning underwater acoustic beacons using a ship towed system. Background technique [0002] With the corresponding development of my country's actions to safeguard marine rights and interests and develop and utilize marine resources, the number and density of ships, aircraft, personnel, and submarine operating equipment at sea continue to increase, and the probability of accidents, dangers, and emergency salvage increases accordingly. Most of my country's aircraft black boxes, pilots, and important sea test equipment have been equipped and plan to be equipped with hydroacoustic beacons. [0003] At present, the supporting search and positioning for underwater acoustic beacon signals are all realized by ship-mounted fixe...

AI Technical Summary

Problems solved by technology

These methods are ship-mounted fixed system detection, which can only detect at fixed points and approach gradually. The common disadvantage is that they cannot perform large-scale high-efficiency search, and are only suitable for precise positioning in small operating areas.

The large-scale rapid search is precisely the most important link after the accident. Taking the missing Malaysia Airlines MH370 as an example, the average water depth of the crashed sea area is about 4,500 meters, and the area spans 3,000 nautical miles. The search efficiency of existing methods cannot meet the requirements. Quick and large-scale search for job requirements

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