摘要
针对目前工业常用的4～20mA信号的隔离转换,本文提出了一种采用电源窃电技术并使用普通光耦实现4～20mA无源线性隔离转换的电路,经过理论分析计算并试验验证,电路结构简单,线性度好,成本低,对被检测回路影响小,可实现单路或多路隔离转换4～20mA输出.
The isolation at present commonly use industrial 4 - 20mA signal conversion, the paper puts forward a kind of the Stealing electricity technology and device using common opto-eleetronic coupler, achieved a 4-20mA passive line isolation converting circuit. Through calculation and analysis and experimental verification of the theory, the circuit structure is simple, good linearity, low cost, to be detected loop effects of small, can be single or multiple isolation converting 4-20mA output.
出处
《仪器仪表标准化与计量》
2013年第4期38-39,42,共3页
Instrument Standardization & Metrology
关键词
窃电
光电隔离
线性隔离
无源
Stealing Electricity Technology Photoelectric Isolation Linear Isolation Passive
