Research On Key Technologies Of Marine Hydrate Environment In-situ Integrated Monitoring System

With the increasing consumption of land and shallow sea resources,marine natural hydrate has gradually become the focus of world attention due to its abundant reserves,clean and environmental protection.However,the development of marine natural gas hydrates is prone to induce geological disasters,exacerbate the greenhouse effect,and cause marine ecological pollution.It is necessary to strengthen the monitoring of seabed environment changes during the development process.The national key research and development project "In-situ monitoring and detection technology for hydrate development environment" proposes to carry out long-term in-situ monitoring research on the mechanical properties of sediments,temperature and pressure of hydrate storage layer,seafloor topography and seabed seepage in hydrate development areas.In this context,a marine hydrate environment in-situ integrated monitoring system for centralizing management and unifying display of hydrate environmental monitoring data is proposed.By integrating and managing hydrate environmental monitoring data resources,the comprehensive monitoring of the subsea environment in the pilot mining area is realized,and it also helps the operators to analyze and make decisions.This paper conducts an in-depth and comprehensive analysis of the hydrate integrated monitoring system,clarifies the system's business requirements and technical indicators,uses a unified modeling language to build the system dynamic interaction model,analyzes and summarizes the main problems of the development process,and the foundation for the development of subsequent systems is laid by building the system function model.To cope with the complex environment at sea,the hardware platform of the system is constructed by establishing an Ethernet communication structure and using a high-performance server,and the system's software functions and architecture are designed by using object-oriented programming ideas and the C# programming language.In order to establish a stable communication connection between the integrated monitoring system and other terminals,a reusable communication component,which is suitable for hydrate monitoring systems,is proposed using component technology,and a unified communication protocol is formulated using binary serialization technology to optimize the communication and interaction between different monitoring systems.In order to perform rapid analysis and dynamic monitoring of multi-type hydrate data,a system data access interface is designed based on the static factory mode,and a mode called "multi-thread + data log table" is proposed to solve the problems of parallel receiving data and graphical display of monitoring data.In order to effectively protect hydrate environmental monitoring data,an RSADES hybrid encryption algorithm is proposed to improve the security of monitoring data transmission.Aiming at visualizing the three-dimensional terrain changes on the ocean floor,a cubic spline interpolation algorithm is designed to optimize the threedimensional terrain image of the ocean floor.A combination of laboratory simulation and joint debugging is used to test the system.The result shows that the hydrate integrated monitoring system could communicate with other monitoring systems,and complete data analysis and dynamic monitoring tasks,which runs well.The performance of the system in terms of communication response time and efficiency of parsing data all reached the design standards,which verified the effectiveness and practicability of the hydrate integrated monitoring system.