基于MSP430的接地电阻在线测量装置的研制  

Development of On-line Measurement Apparatus for Grounding Resistance Based on MSP430

作　　者：蔡艳丽[1] 李正明[1] 褚夫环[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《现代科学仪器》2012年第1期77-81,共5页Modern Scientific Instruments

摘　　要：在分析当前接地电阻测量仪现状及不足的基础上,设计了一种基于MSP430的接地电阻在线测量装置。该装置采用变频测量技术,能自动选频以避开强干扰频段,抗干扰能力强。系统中引入了微弱信号检测、数字滤波及DFT技术,有效地消除了接地网噪声和谐波干扰,测量精度高。实验室模拟测量结果表明,该装置性能稳定,抗干扰能力强,测量精度高。A on-line measurement apparatus for grounding resistance based on MSP430 is designed according to the analysis of the development and inadequacy of grounding resistance survey meter.The apparatus used variable-frequency measurement technology.It can select frequency automatically to avoid strong interference band so that it has strong anti-interference ability.Digital filtering and DFT techniques were adopted in the system to eliminating the power-frequency and harmonic interferences effectively so that it has high measuring accuracy.Measurement Results under laboratory conditions showed that the apparatus has advantages such as stable performance,strong anti-interference ability and high measuring accuracy.

关 键 词：接地电阻 MSP430 变频测量 微弱信号检测 

分 类 号：TM862[电气工程—高电压与绝缘技术]