Design And Implementation Of Position Communication Integrated Underwater Network Node Based On DSP Platform

With the acceleration of marine development,the underwater acoustic communication network has become a research hotspot in the world as an important technical means in marine science.The underwater acoustic communication network interconnects a large number of underwater nodes through network technology,making it flexible in different underwater scenes.application.Among them,the distributed underwater acoustic network has wide application in marine environment monitoring,resource exploration,underwater positioning and navigation,and tactical supervision because of its high security,flexibility and easy expansion.Nowadays,there are already a series of mature products in foreign countries,and our country has no mature research results due to the backwardness at the start and the technical blockade abroad.This paper completes the design and implementation of an underwater network node by analyzing the application scenarios and requirements of distributed underwater sensor networks.According to the requirement that the underwater network nodes can communicate for interconnecting and update their position information with the instructions,a node with acoustic response function,acoustic command signal detection function,self-positioning function and underwater communication function is designed to meet the distributed underwater network application scenario.The paper carries out the theoretical algorithm analysis work,and demonstrates the system technical indicators of the underwater nodes in combination with the actual application scenarios.Simultaneously,the paper also completes the hardware design of the underwater nodes,including the digital signal processing circuit with TI's TMS320VC5509 A chip as the processing core,a multi-stage amplifying receiving circuit having a high gain and low power consumption,and a transmitting circuit using a class D amplifier.Then,the software is designed and implemented on the hardware platform to achieve the desired function.Finally through the pool test and the lake experiment,it is proved that the designed platform has inter-node communication,self-positioning,command detection and acoustic response function,which meets the design requirements.And it will provide the technical basis and platform prototype for the application of the underwater sensor network hereafter.