Research And Design: Electronics And Communication System Of An Ocean Monitoring Buoy Device

With the development and mature of the satellite communications, satellite remote sensing, acoustic telemetry and data assimilation, Marine environment monitoring has entered the era of integrated monitoring from the space, coastal, surface and underwater monitoring. But we have no effective technology to get the continuous and real-time data of marine vertical profiler that include any water layer except ARGO buoy now. Based on the domestic and international advanced technique of Marine monitoring, a ocean wave energy fixed-pointed vertical profiler monitor system is presented and realized. The system can realize real-time and automatic collect the environment monitoring data of vertical profiler. In the acquisition and monitoring system, the control system is the core element.The paper mainly is the design and implementation of the control subsystem. the overall design of electronic and communication system , hardware design of monitoring buoy ,set up ARM-Linux operating systems, software design and system commissioning are given.Electronic and communication system design of the buoy is the subsystem of the ocean fixed-pointed vertical profiler monitor and control system. The monitoring system can be divided into two parts including water monitoring data acquisition subsystem and water Electronic and communication subsystem.The control subsystem can divide into monitoring data collection platform underwater and communication platform on water. Underwater platform uses multiple measuring sensor (nutritive salt, temperature, salinity, turbidity, chlorophyll, PH value, etc) to get marine environment data of vertical profiler. And then the data save to a large capacity SD card and USB device. Buoy electronic and communication system get the collection data from underwater platform by electromagnetic coupling communication. Utilizing A/D sampling read battery voltage and get the buoy stance information by Angle sensor. The data got stored and will send to monitoring center by iridium satellite at the scheduled time. The monitoring system works once for 24 hours.Communication platform using the solar battery and storage battery as power, that can improve reliability of the system.Water platform uses AT91SAM9260 as core chip which has abundant port resources, in order to satisfy various profiler of the data collection, storage and communication needs. The AT91SAM9260 is based on the integration of an ARM926EJ-S processor which has one 4-channel 10-bit Analog-to-Digital Converter, one SSC, four USART and two 2-wire UARTs. The chip has many serials that can reduce the system's power. The chip uses Linux as operating system. The software design uses the modular design method,and divides into serial data acquisition module, reading and writing files module, motion control module, iridium satellite communication module,The monitoring platform software is programmed in VB language. Experiments show that the functions of control subsystem perfectly, operate stably of the electronic and communication system. Marine environmental data acquisition can transmitted to monitor center accurately that meet the design requirements.