Design And Implementation Of Seabed Dynamic Environment Monitoring Software System Based On Ocean Observatory

In 21st century, the exploration and utilization of marine dynamic resources has become the forefront field of the industrial revolution, It is the basic technology and information mean for national security, environmental protection, disaster warning and resource development. It is the effective way to solve a series of current hunman facing problems, such as resource shortage, environment deterioration. The development of marine exploration and dynamic resources has become the world consensus, is listed as an important project by more and more countries. However, our country is still at the start stage in ocean dynamic environment monitoring, has big difference with the developed countries, and urgent technology gap.Based on the urgent demand of seafloor observatory network construction, the seabed dynamic environmenttal long-term real time monitoring system is an important subject of ocean observatory test system in the South China Sea. By the photoelectric composite cable between the system and shore, The system solves the seafloor observatory energy supply and data transmission limitation, integrates the oceanographic observation instruments, such as ADV, ADCP, CTD etc. obtains the bottom boundary velocity profile, turbulent velocity field, temperature, salinity, pressure and other ocean dynamic factors. It preliminary forms the ability of seafloor dynamic environment situ real-time monitoring, lays the foundation for the South China Sea seabed observation testsystem construction.On the basis of ocean observatory in the eleventh five-year, the system realizes a large number of optimal improvement design focusing on system stability, reliability and scalability in hardware and software aspects. The paper introduces the design of specific system software platform, the implementation of communication and power management subsystem, control and data acquisition subsystem, and shore monitoring feedback subsystem, the outlines the related hardware subsystems basis. After a series of environmental testing and joint debugging verification, the system is stable,reliable and scalable, completes project requirements.According to the voltage power and interface types of the integrated instrument the communication and power management subsystem,design sensor communication modules. The modules connects with CAN filed bus,uses the AT90CAN128 controller integrates power management and CAN protocol conversion circuits. It is mainly responsible for sensor data acquisition and control, energy management, working status monitoring.Considering the stability and reliability, the control and data acquisition subsystem designs dual redundancy master-slave control modules. uses the AT91SAM9263 processor, selects the core plate and backplane design scheme, builds the embedded Linux system environment suches as the bootloader transplantation, embedded Linux kernel cutting, root file system design. By building the cross compiler tool, network debugging services and other related development environment,We develops the multi-threaded applications and system scripts, is responsible for forwarding control command, sampling data analysis package filter operations.In the monitoring and feedback subsystem, the shore uses Sugon double U blade server. We designs the shore monitoring and control software including seafloor observatory network channel module, scoustic gateway channel module,sensor energy management module, sensor data acquisition module, shore data management module shore fault diagnosis management module.develops the overall design of the software and data display.After the completion of the overall system hardware and software design, we begins assembling the system control cabinet and platform framework. reduces the routing redundancy and submarine cable wiring interference. For the verification of system reliability and stability, the system conducts interior function and performance tests, snvironmental tests including static pressure ,temperature, vibration, joint tests with other system nodes, analyzes and verifies the sampling data including ADCP、ADV、CTD etc.Finally, the subject of system software and hardware designs is summarized and prospected,As a universal sensor platform,The system can be widely used in marine monitoring tasks such as the coastal observation station, monitoring buoy. Meets the majority of online or self contained the monitoring needs. However, there is still some defects in the design to continuing to improve and optimize, such as data verification and retransmission timeout of sensor modules,broken network data integrity resume of master slave control modules, shore software design about sensor Modules.