A 3-channel electromagnetic signal acquisition platform based on FPGA is designed by utilizing the rich on-chip resources and powerful parallel processing capability of FPGA.At the same time,the three signals can be pre-amplified,signal conditioning,analog-to-digital conversion and stored in the memory,and then processed by the upper computer.At room temperature,two sets of standard sinusoidal signals with frequency of 2n Hz(-2 ≤i n≤13),and amplitude of 1 V are collected,after correction,the relative error between the actual measurement amplitude and the theoretical value of the acquisition platform is less than 0.1％,and the root mean square error of the channel is less than 0.024％.This platform has high acquisition accuracy and great potential for function expansion.
关键词
FPGA/电磁信号采集平台/标定实验
Key words
FPGA/Electromagnetic signal acquisition platform/Relocation experiment
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