Research On Signal Coupling And Positioning Technology Of Ship Seismic Waves

With the improvement of ship manufacturing technology,the noise of ships is getting lower and lower,and it is becoming more and more difficult to locate long-range ship targets by using water sound.A new way to use the ship’s underwater sound to locate the ship’s seismic wave on the surface of the seabed sediment layer to compensate for the lack of water sound to the remote positioning of the ship’s target.There are still some difficulties in using ship seismic waves remotely.The seismic wave energy of the ship excited by the ship’s underwater sound is small,and the complex seabed geological environment makes the ship seismic wave difficult to obtain.After acquiring the seismic signal of the ship,a suitable seabed seismic array for the ship target is established,but the position of the ship target cannot be accurately located based on the seabed seismometer array using the positioning methodIn this paper,based on the difficulty of using ship seismic wave remote positioning technology,the coupling theory of seabed seismometer signal is established.The submarine seismometer is optimized by theory,and the coupled model of seabed seismometer signal is analyzed by ANSYS finite element analysis software.The environment in which the signal is acquired improves the ability of the submarine seismometer to acquire seismic waves from ships.Through the analysis of the traditional positioning method,the time difference method is proposed,and the unique position coordinate of the ship target cannot be accurately obtained by the time difference method.The simplex algorithm is used to improve the positioning accuracy.Based on the analysis of the traditional seismometer,a positioning model of a nine-element circular seabed seismometer array is established.Based on the positioning model,the simplex algorithm is used to simulate the positioning.It is found that the positioning accuracy of the simple shape calculation can achieve accurate positioning of the ship target..It is of great significance to realize the remote positioning of ship targets by improving the seismic wave capability of the submarine seismometer and using the simplex algorithm to improve the accuracy of remote positioning of ship targets.