基于专家系统的高效核相系统设计与实现

Design and Implementation of a Highly-efficient Phase Detection System Based on the Expert System

针对当前核相装置工作效率低和核相需求大的情形,设计并实现了一种高效核相系统。采集包含零线的八路待鉴相信号,基于离散傅里叶变换(discrete Fourier transform,DFT)和软件同步采样方法,实现各路待鉴相信号相位的精确检测。其次,建立核相专家系统用于智能判断,实现待测信号的一次性自动鉴相。进一步地,基于数字信号处理器(digital signal processor,DSP)给出了系统的软硬件实现方法。最后,对所设计系统进行了实验验证,证明所设计系统可实现高效的核相工作。

In view of current low efficiency of phase detection devices and high demand on phase detection, this paper introduces a design and implementation of a highly efficient phase detection system. First, the neutral line, and accurate phase detection is completed for signals for phase detection are collected from 8 channels including these signals, based on discrete Fourier transform （DFT） and synchronous software sampling method. Second, the expert system of phase detection is established for the purpose of intelligent judgment, which can realize in one stepautomatic phase detection of the signals to be tested. Furthermore, hardware/software implementation methods of thesystem are presented based on the digital signal processor （ DSP}. Finally, results of experimental verification of thedesigned system show that the system can conduct highly efficient phase detection work.