The Hardware And Software Design Of Acoustic Positioning Buoy Processing Platform

The underwater acoustic positioning system uses the signal from the underwater target to complete the measurement and display of the underwater target trajectory.The underwater positioning buoy is an important part of the positioning system.It mainly completes the acquisition,storage and acoustic signal processing of the original signal,and communicates and transmits the data with the host computer through the radio.This paper is derived from the long baseline / ultrashort baseline combination positioning system,achieving the design of the underwater positioning buoy based on the NI Compact RIO controller.Firstly,this paper introduces the underwater acoustic positioning system,and gives a brief overview of the structure of the system.Based on the Compact-RIO platform,the design of buoy system application software is completed.The design of the software includes the real-time processor design and the FPGA design.The FPGA software is used for signal collection and processing,mainly completing the original signal acquisition and processing by adaptive Notch filter,battery voltage and leakage alarm information collection and GPS / Beidou positioning module data acquisition.The collected data and processed data is uploaded to Real-time processor.In addition,FPGA also completes the synchronization pulse generation and watch mode design.Real-time processor software is used for the control of the entire buoy system,which mainly completes the acoustic processing data storage and upload,reads and analyzes peripheral data(GPS / Beidou data,voltage and leakage alarm data,compass data),receives and replies to the command of the host computer.The buoy software completed in this paper has been experimented with electric simulator and verified in the lake experiment.The experimental results show that the buoy is able to achieve the data collection,processing and storage,the communication and data transmission with the host computer.The host computer successfully shows the trajectory of the underwater target by using the uploaded acoustic processing data.The result proves the feasibility and practicability of the contents of this paper.