Design and Implementation of Micro Underwater Acoustic Signal Acquisition and Storage System

Based on the advanced RISC machines(ARM) microcontroller and TF card, a micro underwater acoustic signal acquisition and storage system was designed to solve the problem that the underwater acoustic information in test cannot be collected and stored with high fidelity for a long time. High integration analog and digital chips were combined effectively in the hardware design to gain the advantages of small size(3×8 cm), low power consumption, flexible parameter setting, and convenient embedding into small-size acoustic equipment. The software was designed by using direct memory access(DMA) plus ping-pang buffer acquisition mode to ensure data acquisition and storage of the micro controller without interruption and missing, and hence to support the system working stably and reliably for a long time. This system has been successfully applied in an underwater noise acquisition experiment.