电测与仪表2011，Vol.48Issue(11)：20-23,4.
提高交流信号真有效值测量精度的改进方法
The Method to Improve the Accuracy of True Effective Value in Ac-sampling Measurement
孙俊香1
作者信息
- 1. 潍坊学院计算机与通信工程学院,山东潍坊261061
- 折叠
摘要
Abstract
During the process of ac-sampling in power system , the whole cycle sampling is not synchronous. In allusion to the question, using commonly used software time synchronous sampling's technology, the paper puts forward two practical methods to measure ac-signal true root mean square. The first method calculates the period sampling points and periodic error points according to signal period and sampling period. It calculates true root mean square of the signal with periodic error points. According to sampling value when signal become negative from positive and before and after zero-cross point and sampling period, the second method gets the period of signal. It calculates sampling points N in a period and calculates true root mean square of the signal. The two proved methods' main features are briefness theory, wide application, smaller demand for hardware, and significantly improve the measurement accuracy, especially when industrial frequency period changed, the accuracy is very remarkable.关键词
交流采样/真有效值/软件同步/频率/过零点Key words
AC sampling/ true root mean square/ software synchronous/ frequency/ zero-cross point分类
信息技术与安全科学引用本文复制引用
孙俊香..提高交流信号真有效值测量精度的改进方法[J].电测与仪表,2011,48(11):20-23,4.
