华东交通大学学报Issue(3)：96-100,5.
互相关技术在钳口法接地电阻检测中的应用
Application of Mutual Correlation Analysis in Clamped Grounding Resistance Testing
摘要
Abstract
This paper discusses the clamped grounding resistance testing principle based on the signal correla-tion analysis,focusing on how to extract the weak induced current signal with noise. With reference to the ML2035 signals,the signal processing module with the AD630 lock-in amplifier as the core is established, which realizes lock-in amplification of the ground loop induced current signal,reduces the noise effectively and determines the grounding resistance calculation coefficient by experiments. The results show the circuit struc-ture is simplified and the signal can be got easily since the output signal is DC.关键词
接地电阻/互相关/锁相放大/AD630Key words
grounding resistance/mutual correlation/lock-in amplification/AD630分类
信息技术与安全科学引用本文复制引用
..互相关技术在钳口法接地电阻检测中的应用[J].华东交通大学学报,2013,(3):96-100,5.
