Design And Implementation Of Underwater Acoustic Data Monitoring And Acquisition System Based On Buoys

The underwater sound buoy is a common device for collecting and storing underwater acoustic data.In this paper,the data collected by the buoys cannot be transmitted in real time,resulting in a low collection efficiency.Combining the advantages of ship acquisition and buoy acquisition,a set of underwater acoustic data monitoring and acquisition systems based on buoys was designed to solve the problem.The technical problems of real-time feedback monitoring of acoustic environment information collected by buoy devices.The system consists of monitoring buoys and shipborne base stations.In order to realize the system monitoring function,the monitoring buoy uses the PC/104 motherboard as the embedded processing core,the wireless bridge is selected as the transmission module,and the acquisition card and other functional modules are connected to form the embedded module.Data acquisition system.The monitoring buoy adopts the XPE embedded operating system,and on this basis,the application program is developed to realize functions such as data collection and wireless transmission.In order to solve the contradiction between the large amount of transmission data and the limited transmission bandwidth,the system adopts the ADPCM algorithm to compress and encode underwater acoustic data based on the analysis and comparison of classical compression coding,which effectively reduces the pressure of wireless transmission and ensures the stable transmission of underwater acoustic data.At the receiving end,the development master software remotely manipulates the buoy,selects the FFTW algorithm for fast processing of the received data,develops the graphic display control based on the CStatic class,uses the double buffering mechanism to achieve rapid display of the underwater acoustic information,and invokes the multimedia underlying service management waveform data.The realization of smooth sound playback,on this basis,real-time monitoring of underwater acoustic data.Actual test experiments have proved that the system can collect underwater acoustic data for a long time and transmit it in real time.The on-board base station can effectively control the collection process,monitor the collected data in real time,and improve the data collection efficiency,which has practical application value.