Research On Key Technologies Of Ship Cabin Escape Indication System Based On Fire Spread Real-time

There are many electrical equipment inside the cabin of the ship,the space structure is compact,and it is easy to fire.Once a fire occurs,it is difficult to fight and spread quickly.The general personnel lack a clear understanding of the structure of the ship’s cabin and the corresponding fire emergency response capabilities,so they can not get out of danger in time.At present,the existing ship fire protection system can only carry out conventional fire monitoring and prevention,but it cannot give fire rescue commanders and trapped personnel the corresponding rescue escape path instructions in time after the fire.In view of the above problems,this paper combines 3D visualization technology with ship fire monitoring and alarm technology,analyzes and designs the cabin crew escape indication system based on the fire spread situation,and studies the dynamic escape path planning in the virtual environment in 3D visualization.The research content and results of this paper are as follows:For the ship fire drill system cannot evacuation plan according to the real-time fire spreading information limitations and cannot lead the men to escape the problem,in this paper,based on the spread of fire ship virtual dynamic real-time situational escape key technology research,put forward based on fire situation of real-time navigation grid dynamic update map representation and dynamic path planning method to escape,combined with virtual reality technology,real-time to provide personnel to escape escape route guidance information.Fitstly,analyze and design the cabin crew escape indication system based on the fire spread situation from four aspects: system requirements,hierarchical structure,functions,and related technologies,and elaborate the specific plan.Under the background of this system plan,the 63500 DWT tanker cabin is taken as the research object.Relevant research technology routes are proposed for dynamic escape path planning in virtual environment in3 D visualization.Secondly,using Pyrosim software to carry out numerical simulation and analysis of the fire spread based on the field model,the relevant environmental data and spreading rules are obtained,and through the three influencing factors of temperature,CO concentration and smoke concentration,a comprehensive fire spread situation risk assessment index system is established The risk assessment of the fire point data in the three-dimensional voxel grid corresponding to the unit navigation grid is carried out,and the MATLAB software is used to model the structural design and simulation test of the comprehensive fire spread situation risk assessment based on the fuzzy neural network.Comprehensive risk assessment network model.Thirdly,the navigation grid method is used to divide the static virtual scene wayfinding grid,and the dangerous area is judged through the comprehensive fire situation risk assessment network model to complete the dynamic update of the navigation grid;a dynamic escape path planning method adapted to the fire spread environment is proposed,and The traditional A* algorithm is improved and verified by path planning simulation experiments.The improved A* algorithm is suitable for three-dimensional pathfinding and the path planning speed is faster than the traditional algorithm.The searched path length is also shorter than the traditional algorithm,and the pathfinding efficiency is better.Finally,through the use of tools such as Unity3 D,3ds Max,Visual Studio 2017 and other tools to complete the construction of the ship cabin fire escape simulation simulation experiment platform,combined with the relevant technology researched in this paper,the ship cabin fire escape simulation simulation experiment was completed.The analysis of the simulation experiment data shows that the comprehensive The risk assessment method of fire spread situation,the dynamic update method of navigation grid based on fire spread situation information and the improved A star path finding algorithm can effectively complete the corresponding navigation map representation and dynamic escape path planning according to the spread of fire,and the navigation network The efficiency of grid dynamic update and escape path planning update is relatively high.