Design And Implementation Of Multi-Channel Synchronous Data Acquisition System For Underwater Acoustic

Underwater acoustic data acquisition system is an important technology in the field ofunderwater acoustic. The availability of high quality and high precision data is very importantto scientific research. As people pay more and more attention to the ocean development,underwater acoustic data acquisition system is also developed to a mature stage. In the future,underwater acoustic data acquisition system will be developed in multi channelsynchronization, high speed sampling, multiple storage medium, easy control and observation,with more and more multi function, showing the vigorous development trend.A complete acoustic data acquisition system should realize these functions: it processesthe vector hydrophone output signal, including amplification, filtering and so on; it collectsthe conditioned signal with high-speed synchronous; it storages the collected signals to highspeed and multiple medium; it transmits real-time data to the host computer, and storages thedata in the host computer; it controls the acquisition process by the host computer in real time;it observes the signal and waveform in real time, and can playback the data; it can read theGPS data and process it.The hardware part includes analog signal conditioning part and digital collection part.The signal conditioning part realizes the function of vector hydrophone output signal filteringand amplification; the digital acquisition part realizes the function of data collection, storage,transmission, and PC communication. The software part includes embedded kerneltransplantation for ARM9, programming for data acquisition and host computer development.And experimental results proved the performance of the signal conditioning module and thedigital data acquisition system.