基于FPGA和SD卡的水声信号高速采集与存储系统设计

Design of a Acoustic Signals High Speed Acquisition and Storage System Based on FPGA and SD Card

针对目前较高频率水声信号数据难于实时获取的局限,提出了一种基于SD卡和FPGA的高速大容量水声信号采集与实时存储系统设计,设计中采用单片机作为主控单元,SD卡作为存储介质,FPGA作为数据采集和SD卡之间的高速接口,FAT文件系统作为数据存储形式。该设计具有体积小,可高速实时存储,存储容量大,通用性强,易于扩展升级等特点,已在某水下航行器辐射噪声信号获取中得到成功运用。

Aiming at the disadvantage of the acoustic signals,difficult to acquire real-time at present,a design of high-speed acoustic signals acquisition,large capacity and real-time store system is proposed,which uses single chip as a controller,SD card as memory,FPGA as high-speed interface between acquisition and SD card,FAT file system as format of storage.This design has merits of small size,capability of high-speed and real-time storage,large capacity,high universal ability and expansibility,etc.It has been successfully applied in noise acquisition of a underwater vehicle.