Underwater Heterogeneous Multi-source Detection Performance Deduction And Information Fusion Technology

In recent years,with the continuous progress of underwater acoustic target stealth technology and the complexity of the ocean battlefield,the detection,location and tracking of underwater acoustic target are facing more and more challenges.Due to the complexity of Marine target signal,strong disturbance of underwater acoustic environment and uneven performance of detection platform,the detection of single platform has been unable to meet the requirements.Will therefore active sonar array detecting node,passive sonar array detection,target detection based on acoustic field node even magnetoelectric assembly with underwater heterogeneous multi-source detecting network formation,the measurement information is obtained by detecting the platform to platform and system information fusion,get more complete battlefield information comprehensively,it has become the future underwater target detection is an important direction of development.Under the above background,facing the detection requirements of underwater multi-targets and stealth targets,this paper constructed a heterogeneous multi-platform collaborative detection system composed of active sonar array,passive sonar array and matched field passive detection platform.Through the cooperative observation and information fusion processing of the system,more comprehensive,macro and accurate target situation information can be obtained,which provides a new solution for ocean monitoring and decision-making assistance.In this paper,the target motion model is firstly constructed.Based on the physical characteristics of complex Marine environment and the physical model of heterogeneous detection system composed of active sonar array,passive sonar array and matched field passive detection platform,the measurement information of each platform is obtained according to the physical model under the unified target motion state.Secondly,the physical model of platform-level information fusion is constructed according to the characteristics of different platforms,and the results of platform-level information fusion are obtained.The active sonar array platform obtains the target track information based on the measured Angle and distance information,and then tracks the platform-level information fusion results of the active sonar array based on the joint probability data association algorithm.The passive sonar array platform conducts cross positioning according to the Angle information measured by the two platforms to get the track information,and then tracks the track information based on JPDA algorithm.The matched field passive detection platform obtains the target track information based on the measured Angle and distance information,and further correlates to obtain the target track information.Finally,the association and difference between heterogeneous platform-level information were analyzed in the fusion center,and the reasonable fusion theory of heterogeneous multi-source detection target information was explored.Firstly,the platform-level information is preprocessed,and the tracks with long interruptions are segmented,and the tracks with short interruptions are frame supplemented.Secondly,the pre-processed track correlation and false track filtering are carried out,and the tracks of various heterogeneous platforms are further organically fused to obtain the result of system-level information fusion,so as to obtain a more complete,macro and accurate target situation.Finally,the influence of the information of each platform on the accuracy and performance of system-level information fusion is analyzed to improve the detection ability and robustness of heterogeneous multi-platform.In this paper,the physical model of underwater heterogeneous multi-source detection is constructed,and the theoretical research and analysis of platform-level information fusion and system-level information fusion are carried out,which provides theoretical basis and performance reference for underwater heterogeneous multi-source detection system,and theoretical basis and technical support for networked information technology of ocean observation.