Study On The Technologies For The Real-time Transmission Of Ocean Dynamic Parameters Based On Buoy

The underwater acoustic signal is affected by marine environment while transmitting.There is a certain coupling relationship between ocean dynamic parameters and acoustic parameters.In order to analyze the coupling relationship between acoustic field and ocean dynamic field,this paper studied the acquisition and real-time transmission of ocean dynamic parameters based on buoy.After studying the underwater data transmission technology,wireless communication technology,this paper design a data transmission link reasonable based on the buoy system.It contains inductive coupling data transmission,radio data transmission,the buoy control unit with low power processor MSP430 as the main control chip and SD storage module.At the same time,the communication rate is high,the data transmission is stable and reliable,the release is convenient and the cost is low.The vertical structure ocean dynamic parameters of temperature,pressure,salinity and current velocity were measured by 16 temperature and depth measuring instruments(TD),4 temperature,salinity and depth instruments(CTD)and 1 acoustic doppler current profiler(ADCP)and real-time transmitted to shore station through data transmission link.Through the laboratory test,the data reliability and validity of the inductive coupling transmission and radio data communication are confirmed.By monitoring the software control process through the serial port monitor,software bugs can be fixed with a short time,and the stability of the system can be improved.After the laboratory copy machine test,the stability and reliability of the system are confirmed.And then sea trial experiment was done in South Sea.In the South Sea trial experiment,the system worked normally and continuously for 35 days,and obtained the temperature,salinity and current velocity of different depth.The underwater data can be transmitted to the surface buoy through coupling transmission link and then transmitted to shore station to do the coupling of acoustic field and ocean dynamic field.Sea trial experiment results show that the system has achieved the design requirements and technical indicators,and it works stable and reliable.