A passive sonar buoy underwater maneuvering weak target adaptive detection method

A passive sonar buoy underwater maneuvering weak target adaptive detection method is proposed to address the difficulty of passive detection of underwater weak targets. Firstly, the dual extremum method was used to automatically construct a collaborative detection buoy group, which was used to locate underwater acoustic signals and eliminate underwater noise and interference outside the collaborative detection area; Secondly, the segmented sampling processed positioning information was projected in the horizontal and vertical directions, and the position information of the biplane was adaptively detected using pre detection tracking theory and Hough detection algorithm set, obtaining points that meet the dual accumulation threshold from noise and interference; If the detection was unsuccessful, re segment the sampling process and repeat the projection and detection process to obtain the initial detection points; Finally, using multi-level motion constraint conditions to fuse biplane point trajectories, high-precision real target trajectories were obtained, achieving passive detection of weak underwater targets. The simulation results show the overall performance of this method is superior to the existing authoritative detection methods.