Development Of Master Control System For Seabed Sediments Acoustic Measurement Based On STM32

There are many kinds of mineral resources in the ocean.Facing the increasing scarcity of land resources,it is imperative that people turn to the exploitation of seabed resources.Using sound wave is a main method to detect seabed resources,that prompts scientists to strengthen the exploration of the acoustic characteristics of seabed sediments.At the same time,the study of acoustic characteristics to sediment is not only conducive to the development of seabed resources,but also conducive to the grasp of seabed geomorphology,so as to carry out the layout of submarine pipelines and the construction of marine engineering.Therefore,it is great significant to study the acoustic characteristics of seabed sediments.The way to obtain acoustic parameters is application of acoustic wave measuring device to seabed sediments.Among them,the main control system of a seabed sediment acoustic wave measuring device is a core for the device,and its control performance is resulted in the effectiveness of the measurement data.To reach above objective,a main control system of a seabed sediment acoustic measuring device is developed in the dissertation.The main contents of this dissertation are as follows:(1)The measurement methods of acoustic parameters of seabed sediments at home and abroad are discussed.The development of laboratory measurement and in-situ measurement,and the methods of acoustic velocity and attenuation parameters of seabed sediments are summarized in this dissertation.(2)According to the requirement of the field measurement device,the principle of the seabed sediment acoustic wave measurement control system is analyzed.The technical performance of the main control system is putting forward according to the measurement requirement and the principle of the control system,and the structure of the main control system for the seabed sediment acoustic wave measuring device is determined.(3)The hardware section of the main control board has been completed,including the design and debugging of the main control circuit,the necessary circuit for STM32 smallest system operation,the extended memory circuit,the external data memory circuit and communication interface circuits.(4)The software of master computer for acoustic wave acquisition and control is developed,which includes serial communication program,acoustic wave acquisition parameter setting program,data sending and receiving program to slave computer,data saving and acquisition program,etc.In design of STM32 main control system,there are IO communication control program,RS-485/RS-232 communication program,data acquisition control program,data storage program and data upload program.(5)The static test of the four-way time-multiplexed IO port of the main control system is carried out,and simulation of the process of sampling control reading data.At last,make a brief analysis of the waveforms.