Research On Marine Monitoring Small Buoy System

China's seas are widely distributed and rich in marine resources.Real-time and all-round monitoring of the ocean can enable humans to develop and utilize marine resources reasonably while protecting the marine environment,which is of great significance.At present,most marine monitoring buoys are large in size and weight,difficult to deploy,expensive in communication,and low in refinement.For convenient,low-cost,precise and precise collection of ocean surface currents and water quality parameters,based on the Lo Ra wireless communication mechanism and Beidou positioning technology,The disposable surface flow monitoring micro-buoys and the aquaculture water quality monitoring small buoys are designed to realize the ocean real-time monitoring and management of surface flow hydrodynamics and water quality parameters.Thesis designs and develops disposable surface current monitoring micro-buoys.The Beidou positioning technology is used to collect the position data of the buoys,and the Lo Ra wireless transmission technology is used to solve the problems of high communication cost and high power consumption of the buoys at sea.By placing a large number of buoys in the monitoring area and letting them drift with the tide,the position data of the buoys are periodically uploaded to the server.Real-time monitoring of the direction and velocity of ocean surface currents is realized.In order to make the buoy more accurately reflect the dynamic parameters of the surface water,thesis designed a micro-buoy structure with stabilizer fins and rudder blades,and optimized the dimensions of the rudder blades.Through flume experiments and flume simulation with ANSYS Workbench,it was proved that the structure had good stability and the measurement error was relatively stable.A kind of small buoy for monitoring water quality in aquaculture area is designed and developed,which using low power distance Lo Ra communication mode,carrying a portable digital sensors to realize PH value,dissolved oxygen,temperature,velocity and other parameters of water quality monitoring,powering by solar panels to realize real-time monitoring of water quality parameters in aquaculture areas.The buoys are small in volume and weight,simple in structure and low in cost,so they are suitable for mass distribution.Through a large number of offshore experiments,thesis tests the practical application performance of disposable surface current monitoring micro-buoys and water quality monitoring buoys in aquaculture areas,and displays surface current and water quality parameter monitoring data in a visual form through the experimental platform.Aiming at the monitoring of ocean surface current and aquaculture water environment,thesis applied Beidou positioning and Lo Ra mechanism wireless transmission technology to realize data acquisition and transmission,and designed a micro buoy structure with stabilizer fins and rudder blades with innovation.Through a large number of experiments and applications,it is shown that the two kinds of buoys have important practical application value for sediment deposition tracking,sea floating garbage tracking,red tide tracking,fine aquaculture and so on,which is beneficial to the sustainable development of China's ocean.