基于双施密特触发器的类正弦波相频采集方法  

A similar sine wavephase frequency acquisition method based on double schmidt trigger

作　　者：唐琪 TANG Qi(Foshan Power Supply Bureau of Guangdong Power Grid Corporation,Foshan 528000,China)

机构地区：[1]广东电网有限责任公司佛山供电局,广东佛山528000

出　　处：《电子设计工程》2019年第2期66-69,共4页Electronic Design Engineering

摘　　要：首先介绍新投运电缆局部放电试验中同步信号相位和频率难以跟踪的实际问题,设计了一种通过无线通讯进行相位和频率跟踪的方法。接着通过分析,得出该方法对幅值失真的类正弦电压波形的相位采集不准确,从而对方法进行了修正。然后设计了一种基于双施密特触发器的类正弦波相频采集方法,通过对采集电路和算法的具体论证,解决了无线通讯下同步信号相位和频率的准确跟踪问题。First,the practical problems of the phase and frequency of synchronous signal in partial discharge test of new cable are introduced,and a method of phase and frequency tracking through wireless communication is designed.Then through the analysis,it is concluded that the phase acquisition of the similar sine voltage waveform of the amplitude distortion is inaccurate,and the method must be corrected.Then a similar sine wave phase frequency acquisition method based on dual Schmidt flip flops is designed.Through the detailed demonstration of the acquisition circuit and algorithm,the accurate tracking of synchronous signal phase and frequency under wireless communication is solved.

关 键 词：局部放电 差分电路 相频跟踪 类正弦波 施密特触发器 

分 类 号：TN93[电子电信—信号与信息处理]