基于ARM的微弱电流检测系统

Detection System of Weak Current Based on ARM

针对微弱电流检测技术中噪声敏感,专业要求高,结构复杂等问题,实现了一种以ARM控制器为核心的微弱电流检测系统。在分析典型微弱电流检测方法——电流电压转换法的基础上,将该方法改善成以OPA111为模拟前端的反馈电阻网络的电流电压转换器。并采用高精度模数转换器ADS1115采集电压信号,通过ARM控制器的FIR数字滤波得到目标数据采集。通过应用测试,所设计的系统具有漂移小、稳定性好、体积小、精度高等优点。

Aiming at the problem of noise sensitivity,high professional requirements and complex structure in weak current detection technology,a weak current detection system based on ARM controller is implemented in this paper.Based on the analysis of the typical weak current detection method,the method is improved to a current and voltage converter with a feedback resistor network with OPA111 as the analog front end.And the high precision analog to digital converter ADS1115 is used to collect the voltage signal.