Design And Implementation Of Wave Buoy Data Acquisition System

Wave buoys can automatically monitor the wave height,period and direction of the ocean in fixed sea areas,all weather and all day.It plays an important role in marine environmental monitoring,marine scientific research,and marine disaster early warning.Miniaturization,low power consumption,and high precision are the development directions of wave buoys.This topic focuses on the design and implementation of a wave buoy data acquisition system.It conducts a detailed study on the working principle and related algorithms of the entire system,and implements the wave buoy data acquisition system in hardware and software.Finally,the experimental verification is completed by designing the corresponding experimental platform.The details are as follows:Firstly,complete the wave buoy data acquisition system design.The structure of the wave buoy system is introduced as a whole,and the working method and technical indicators of the wave buoy data acquisition system are given.By comparing and analyzing the wave measuring principle based on the accelerometer and the GPS sensor,a three-axis accelerometer and magnetometer are used to complete the wave height,Wave period and wave direction measurement scheme.Secondly,a hardware measurement system based on STM32F429 processor and MTI-3-8A7G6 T inertial sensor is designed and implemented.The detailed circuit design of the processor,sensor,clock,TF card,communication interface,power supply and other modules that make up the system is given.The system schematic design,PCB design and physical layout are completed.The test results show that the hardware platform can meet the system's requirements for miniaturization,low power consumption and low cost.Finally,complete the algorithm and software design of the buoy data acquisition system,including the detailed design process of wave height,wave period and wave direction measurement algorithm.The measurement of wave height and wave period adopts the second integration of acceleration in the frequency domain,which can effectively avoid the influence of the DC component on the integration result.At the same time,digital filtering is performed in the frequency domain to filter the accelerometer bias error and low frequency random noise.The measurement of the wave direction is obtained by using the angle between the horizontal synthetic acceleration and the magnetic heading.The wave measurement algorithm was successfully transplanted into the STM32F429 processor through software design to implement the wave measurement function.The wave buoy data acquisition system has performed calibration experiments at the National Ocean Technology Center.The double-ring rotating truss sine simulation mechanism is used to simulate wave motion.For waves with different wave heights and wave periods,the measurement error of the buoy data acquisition system is within the specified range.The system calculates the wave eigenvalues accurately and runs stably for a long time,which meets the measurement requirements of high accuracy and high reliability.