基于FPGA的电磁场信号采集与处理系统研究

Research on electromagnetic field signal acquisition and processing system based on FPGA

为满足对水下电磁场信号的采集与实时处理,并将处理结果上传主机的需求,设计了一种三维磁场信号采集及处理系统。系统采用FPGA控制6通道A/D转换器对磁场信号同步采样,并将原始数据存储在NAND Flash中,同时FPGA对采样数据进行滤波、FFT等初步计算分析。ARM芯片完成信号特征的提取和估计,将结果通过CAN总线上传远端主机。为适应小型水下航行器对空间和航行时间的要求,系统采用低功耗、小型化设计。

In order to meet the needs of the data acquisition and real-time processing of underwater electromagnetic field,the processing results are uploaded to the host computer,a three-dimensional magnetic field signal acquisition and processing system is designed.The system adopts FPGA control 6 channel A/D converter to sample the magnetic field signal synchronously,and store the original data in Flash NAND,at the same time,the FPGA is used to filter the sampled data,FFT and so on.ARM chip to complete the signal feature extraction and estimation,the results will be uploaded through the CAN bus remote host.In order to meet the requirements of the space and time of the small underwater vehicle,the system is designed with low power consumption and small size.