摘要
为了解决高压测量时输入、输出之间的线性传输和高压隔离问题,介绍了一种基于普通光耦P521的高压测量方法。论述了线性隔离电路的原理、测量的具体方法以及误差的来源,并根据高压测量时需要远距离控制这一特点介绍了利用RS-485总线进行远距离传输的方法。试验结果表明:该测量方法具有测量精度高、隔离高压、结构简单的优点。
In order to solve the problems of linear transmission and high-voltage isolation between input and output of high- voltage measurement, a method of measuring high voltage based on P521 was introduced. The principle of linearity analog circuit as well as the technique of measurement and origin of error was described, in addition, in order to solve the problem of distant trans- mission control, a method of distant transmission based on RS - 485 was introduced. The experiment results show that the method offers such advantages as high precision, high-voltage isolation and simple structure.
出处
《仪表技术与传感器》
CSCD
北大核心
2012年第1期82-84,共3页
Instrument Technique and Sensor
关键词
高压测量
普通光耦
线性隔离
RS-485
high-voltage measurement
nomoral optocoupler
linearity isolation
RS - 485
