微弱电信号检测系统研究与设计

Research and Design of Weak Electrical Signal Detection System

为了改善微弱电信号检测条件、降低检测设备成本以及提高检测应用的灵活性,本文设计并开发了一个微弱电信号检测系统。系统将互相关检测技术和虚拟仪器相结合应用于微弱电信号检测,实现了微电阻测量、微弱交流电压测量、微弱交流电流测量和运算放大器交流开环放大倍数测量等功能。实验结果证明,虚拟仪器互相关检测技术在微弱电信号检测方面具备可行性,对其进一步应用于工程实际中提供了理论支持。

In order to improve the detection conditions of weak electrical signals,reduce the cost of detection equipment,and improve the flexibility of detection applications,this paper designs and develops a weak electrical signal detection system.The system combines cross correlation detection technology and virtual instruments to detect weak electrical signals,achieving functions such as micro resistance measurement,weak AC voltage measurement,weak AC current measurement,and operational amplifier AC open loop amplification measurement.The experimental results prove that the virtual instrument cross correlation detection technology is feasible in detecting weak electrical signals,providing theoretical support for its further application in engineering practice.