Development Of Marine Environmental Monitoring Platform Based On CAN Bus Network Technology

With the rapid development of marine cause, a huge demand is required not only on the marine environment monitoring, but also on the performance of marine environmental monitoring platform(MEMP) which was put forward to the comprehensive observation and experimentation platform direction. In the design of the programme, the existing MEMPs highlight the principle of the low power consumption, high reliability. However, they neglete the aspects of the high-speed, large capacity storage and reciprocity, etc. Such systems have its limitations when dealing with the applications of marine science experimental equipments that need power-hungry, and high-speed. what is more, to apply more new advanced sensors will also meet difficulties. Therefore, it is necessary to develop a MEMP system which has the advangtage of high-speed, real-time, modular, and as well as the ability of arbitrary expansion.Learning from the previous traditional system's strong points to offset it's weakness, this project does some analysis and research on the CAN bus MEMP. The importance is focused on the constructing of the CAN bus network system and designing of the application layer protocol, and on this basis, designed the CAN Bus Controller intelligent network nodes and intelligent sensor nodes, and completed the hardware design and software development.In the system architecture design, CAN bus technology is applied on MEMP. CAN bus as an effective support for distributed control and real-time control could improve the reliability of the system, and based on specific field application allows to dynamically add or remove sensor acquisition units without having to make any hardware changes.It is greatly improving the system's flexibility and scalability. In the design I also draft the application-specific CAN Bus application layer protocol.In the hardware design, using the highly reliable and modular design principles, according to the system functional requirements of the system the whole system is compartmentalized to several modules. And for different modules, intelligent controllers with specific functions are developed.In the software design, multi-task embedded development concept is introducted to meet the high-volume data processing and the display of real-time requirements. Thus uC/OSII is transplanted in the LPC2292 and relevant drivers based on the uC/OSII platform are compiled.Finally, characteristics of this system are summarized based on the actual result of the research and development of this system, and the future designing work is also prospected.