摘要
分析了准同步采样法的基本工作原理,研究了为了减少编程计算量的准同步简化算法,以及为了提高准同步采样法准确度的变频率采样法。最后,把准同步采样法应用到三相多功能电度表中,实现了0.2S精度的三相多功能电度表的设计。实际测试结果表明,该表具有精度高、功能齐全及性能可靠等特点。
This paper analyses the basic principle of the quasi-synchronous sampling. It studies the simplified arithmetic of quasi-synchronous sampling in order to reduce the programming calculation, and studies the frequency sampling method to improve the precision. Finally, it applies the quasi-synchronous sampling into the three-pimse muhi-fimctional power meter, realizes the design of the three-phase multi-functionM power meter with 0.2S precision. The result of the practical running testifies that it has the advantages of good precision, full ：function and high reliability.
出处
《微型机与应用》
2012年第23期32-34,37,共4页
Microcomputer & Its Applications
基金
浙江省科技计划项目(2008C21136)
关键词
电能表
DSP
准同步采样
0
2S精度
power meter
DSP
quasi-synchronous sampling
0.2S precision
