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.
出处
《日用电器》
2007年第1期49-51,共3页
ELECTRICAL APPLIANCES
