Study On The Key Technologies For The Real-time Transmission Temperature Salinity And Depth Chain Subsurface Buoy System

Since ocean environment is very complex and volatile,it is of great importance to grasp ocean environmental parameters and their changing rules in the study of ocean economy,military and technology.As the fundamental equipment in ocean exploration,sonar can be largely influenced by ocean environment when using.Therefore,effectively monitoring the real-time ocean dynamic environmental information for a long time is needed.The main objective of this paper is to achieve real-time data transmission of temperature,salinity and depth chain subsurface buoy system.The temperature,salinity and depth chain subsurface buoy system was arranged in the vertical section of epicontinental sea regions and multiple position variable sensors,the position of which can be adjusted randomly to measure long-time temperature,pressure and salinity at different depths,was integrated along the chain.Data collected from these sensors can not only have self-contained storage,but also be transmitted to the communicating buoy above the sea surface through inductive coupling system chain.The communicating buoy can not only control the data upload process,but also satisfy the needs of establishing wireless communicating network above the sea level and have real-time responses to data-collected orders from the shore station.Data can be sent to the station ashore through the wireless station and users can analysis the relationship between acoustic field and ocean dynamic environment based on the data.As for the initial objective,this paper mainly achieved the function of data acquisition,transmission and storage for temperature,salinity and depth chain subsurface buoy system.Buoy-controlled circuit adopted MSP430 as CPU,mainly of which is consisted of serial communication module,real-time clock module,SD card storage and power module.After finishing the system design,the test of each part and the joint debug of whole system were performed in the research lab mainly including the test of power,data transmission,data transmitting speed and system stability of the hardware working platformFinally,sea trial tests were done in the region of the South Sea,during which the feasibility of system data acquisition and storage capacity,inductive coupling data transmission capacity and wireless transmission capacity.