一种高精度接地电阻测量变送器  

High-precision Transmitter for Measurement of Grounding Resistance

作　　者：苏展[1] 黄开胜[1] 谭义[1] 张晶[1] 罗鹏辉[1] 刘敏[1] 

机构地区：[1]广东工业大学自动化学院,广州510090

出　　处：《日用电器》2007年第1期49-51,共3页ELECTRICAL APPLIANCES

摘　　要：介绍了一种以高精度恒流源、24位无误码AD转换器AD7714以及微处理单元ATMEGA8为核心的接地电阻测量变送器,并详细地说明了系统的硬件原理电路。通过理论与实验证明,该变送器具有很高的精度。This paper mainly proposes a new design of a high-precision transmitter which is used in grounding resistance measuring systems. Additionally, the hardware design which is mainly based on AD7714, constant-currant power and ATMega8 is introduced in detail. Through theoretical analysis and practical experiment, this transmitter proved to be highly precise.

关 键 词：接地电阻 变送器 恒流源 AD7714 ATMEGA8 

分 类 号：TM934.15[电气工程—电力电子与电力传动]