Design And Realization Of Control And Timing Software For Ship Integrated Navigation Interface Equipment

Ship integrated navigation refers to the collection and storage of various types of navigation equipment data based on computer and network communications.These data can help professional navigators obtain ship positioning,time,water depth,weather and other parameters to assist them in better performing maritime tasks and ensuring life safety.Ship integrated navigation I/O interface equipment,as the core component of the maritime integrated navigation system,serves the navigation master control system upwards,and acts as GPS receivers,gravimeters,gyro compass instruments,depth sounders,radars and other instruments and equipment downwards.The data interface plays a pivotal role in the data transmission of the entire system.As an important part of the integrated navigation system,the control and timing software runs in the embedded system of the internal board of the interface device,and works closely with the interface device to realize system timing and management and control of external devices.As a server,the software is connected to the client’s navigation main control system network,so as to realize the information interaction between the two and time synchronization.Therefore,the design and development of a control and timing software suitable for ship’s integrated navigation system is of great significance in this paper.First of all,this article clarifies the control and timing software design requirements based on the research background of the subject and the actual situation of the enterprise,and at the same time summarizes,organizes and analyzes these requirements.These requirements mainly include software functional requirements,non-functional requirements,and system environment requirements.Then,build a system model and determine the overall design structure of the software.By adopting a high cohesion and low coupling design method,the software system is layered,modularized,and organized;the network connection design is based on the TCP Socket communication principle to provide a safe and reliable Data transmission path,clarify the relationship between the system network topology and each subsystem module,and then determine the system data flow direction;design the internal communication protocol of the software system,including the definition of the basic format of the uplink and downlink data frames and the definition of the time stamp format,Clarify the data analysis and integration and packaging process;give a detailed design plan for the system’s key functional modules,in which the time synchronization module updates the embedded system time by analyzing GPS timing information,and uses Chrony technology to build a time server to achieve system global network time synchronization.Finally,use the Qt integrated development environment and multi-threading technology to code the software and develop a test plan.Judging from the test results and actual usage,the software system runs stably,has good performance,can effectively collect data from offshore operations,realizes real-time control and precise timing functions,and meets the expected design requirements.