A method and system for searching and locating underwater acoustic beacons

Abstract

A method and system for searching and locating underwater acoustic beacons, which belong to the technical field of underwater target searching and locating. The method is realized by towing a towing system by the mother ship at a certain speed, and the characteristic is that the search operation ship uses a tensile tow cable to tow an underwater tow body at the stern, and continues to sail at a certain speed, and a solid linear array is installed inside the tow body Perform direction finding and positioning on the underwater acoustic beacon signal, and the direction finding and positioning data are transmitted to the computer on the search operation ship through the tensile tow cable. The software display interface of the computer observes whether there is an acoustic beacon signal. When the acoustic beacon signal is found Finally, calculate the direction-finding azimuth of the linear array and the output coordinates of the satellite positioning equipment on board to locate the acoustic beacon to be searched. The effects and benefits of the present invention are that the method can be used to realize fast and large-scale search operations for underwater acoustic beacons, the search efficiency is high, and the submarine underwater acoustic beacons can be quickly searched and located to win valuable time for timely salvage. Adjust the deployment depth of the drag body in the water for detection, not only suitable for shallow seas, but also for deep seas.

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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