Principle Of Detection Based On Flow Field Of Underwater Moving Object

Underwater detection and sensing are prerequisites for underwater activities such as water confrontation and ocean exploration.The existing methods of underwater detection and sensing have certain limitations,which are difficult to meet the needs of future high-intensity,high-real-time,omni-directional and complex environmental perceptions.The use of water flow as a source of information detection means to become the water environment detection and perception of the direction of development.In this paper,the basic principle of underwater obstacle is analyzed by using water flow information,which provides the data basis for underwater detection and sensing based on water flow information.The analytical method of the flow field around the underwater moving body and the interference effect of the obstacle on the flow field around the moving body are obtained,and the judgment criterion of the underwater moving body to avoid the obstacle is formed.It lays the foundation for the related research in this field.The physical model of the research object is abstracted and constructed,the corresponding numerical simulation algorithm is studied,and the relevant pool drag test is carried out to calibrate the numerical simulation results.The characteristics of the flow field around the underwater body are studied,and the flow network analysis method is established for the discretization of the flow field.The distribution characteristics of the geometrical parameters and the physical parameters are systematically analyzed.The interference effect of obstacle on the flow field around the moving body is studied.The geometric and physical parameters of the obstacle around the flow field and the interference and twist of the flow field around the moving body are analyzed,as well as the obstacle characteristic parameters and motion characteristics of the flow around the body.The decision criterion of avoiding the obstacle of the moving body is formed,and the strategic planning and behavior design of the moving body to avoid the obstacle are carried out to lay a theoretical and data foundation for the development and application of the new underwater exploration principle.