Maritime searching method and maritime searching device of flight data recorder

Abstract

The invention discloses a maritime searching method of a flight data recorder. The maritime searching method comprises the following steps of selecting two different places, simultaneously acquiring signals of a flight data recorder through hydrophones, and furthermore recording position coordinates of the places of the hydrophones; determining the azimuth of a signal source with the signals according to the signals and the position coordinates; correspondingly drawing two trajectories on a map according to the position coordinates and the azimuth; calculating an intersection point of the two trajectories, and acquiring a suspected position coordinate of the flight data recorder at an acquisition time point; repeating the steps, and acquiring a plurality of suspected position coordinates; acquiring the moving trajectory of the flight data recorder according to the plurality of suspected position coordinates, and calculating the position coordinate at a catching time point. The invention further discloses a maritime searching device of the flight data recorder. The maritime searching method and the maritime searching device can quickly and accurately acquire the position of the flight data recorder, thereby effectively finishing a searching operation.

Description

technical field [0001] The invention belongs to the technical field of sea search, and in particular relates to a sea search method and device for a flight data recorder. Background technique [0002] Flight data recorder, commonly known as "black box", or FDR for short, is an instrument that stores the flight status of the aircraft. The above data will be stored in the black box during flight. Once an air crash occurs, the flight parameters during the entire accident process can be found from the black box, and people can know the cause of the crash. In order to avoid being destroyed in a plane crash, it has the characteristics of high temperature resistance (600 ° C ~ 800 ° C), high pressure (can withstand the pressure of 1 ton), and is not afraid of corrosion. It is made of metal materials. [0003] Therefore, in the case of an accident or an air crash, it is extremely difficult to search for the black box, especially for the black box that fell into the sea. In the cas...

AI Technical Summary

Problems solved by technology

[0006] (1) Since the person who listens to the signal is an expert in this field, it takes a long time of repeated learning and training to hear the corresponding signal more accurately, and the subjective factor is relatively large;

[0007] (2) The time interval between the first listening and the second listening is relatively large, generally about 20 minutes, and the determination of the intersection point is completed once. During this process, the position of the flight data recorder will change due to the flow of sea water. resulting in unsuccessful searches;

[0008] (3) Listening and calculating intersection points are all manual operations, which not only consumes manpower, affects work efficiency, but also has large errors

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