基于ARM的微弱信号采集系统的设计

为提取噪声背景下的微弱信号,提出了一种硬件与软件相结合的实现方案。采用仪表放大技术和单片机控制技术相结合对数据进行检测和处理。该系统优化硬件调理电路设计,保证采集数据的精度要求。利用ARM实现基于数字相关的算法,改善信噪比,有效恢复淹没于强背景噪声中的微弱信号。最后通过对模拟低频微弱电流信号的检测实验,充分显示了该系统在微弱信号检测方面的实用性和有效性。

Design of weak signal decting system based on ARM

to extract the weak signal with strong noise background,a scheme which combines hardware with software for realization of this this method is designed.In this method,the signals are detected and processed using the classical instrument magnifying technique and single-chip microcomputer control.The designing of front hardware is optimized to insure the precision of acquiring data.The system adopt ARM accomplishing the arithmetic of digital correlation,improving Signal-to-Noise Rate,acquiring weak signal which sheiled by vast powerful noise.Through the experiment of artificial low-frequency weak-signal detection,the system fully reveals its practicality and validity in the field of weak signal detection.