Research On Ocean Wave Buoy System Based On Parallel Six-dimensional Acceleration Sensor

In the wave measurement technology based on accelerometer,The hardware integrator for acceleration-displacement has a large integration error for the wave signal with strong randomness.The wave data time-frequency domain analysis software of the embedded-PC dual platform system is inaccurate and the localization level of the ocean observation equipment is not high,More dependent on issues such as imports.In this paper,the research scheme of "numerical integration strategy of parallel six-dimensional accelerometer and airborne data processing system" is adopted,An ocean wave buoy based on parallel six-dimensional accelerometer is developed.To improve the accuracy of wave observation and provide theoretical basis and technical support for the research of domestic acceleration wave observation instruments.This paper studies the mechanical structure design of the buoy,the hardware of the wave buoy,the software of the wave buoy and the client system.Firstly,considering the working environment and the construction of peripheral devices,the flying saucer buoy structure is designed to ensure the safety and reliability of the system.Secondly,the parallel six-dimensional accelerometer is used as the system acquisition unit,and the signal processing module is designed by Altium Designer software to process the charge of the acquisition unit signal.The peripheral device driver,acceleration decoupling algorithm,acceleration-displacement time-domain integration and wave characteristic time-domain statistics are carried out by the airborne FPGA processor to realize the design of floating samples of ocean waves.Finally,the client system is implemented by LabVIEW software,which has four functions: reading data,displaying data,storing data and querying data.System testing and experimental verification,The effectiveness and reliability of the parallel six-dimensional acceleration sensor,signal processing module and client system are proved by system testing.The accuracy of the wave observation is verified by the contrast experiment with the TRIAXYS MINI direction wave buoy in the water near the Second Yangtze River Bridge in Nanjing.The wave precision is better than 3.73%× observation value,the wave period accuracy is ±0.3s,and the wave direction measurement range is 0°~360° and the accuracy is ±1°,which meets the application requirements of ocean wave observation.