基于FPGA的LCR测试仪  

Development of a LCR testing instrument based on FPGA

作　　者：徐丽娟[1] 邹云屏[1] 黄柱[1] 汤琛[1] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北武汉430074

出　　处：《武汉大学学报（工学版）》2006年第1期101-105,共5页Engineering Journal of Wuhan University

摘　　要：介绍了一种LCR测试仪,它利用FPGA实现直接数字频率合成,产生波形好、幅值稳定的正弦波作为测试激励信号;相敏检波器设计方法独特,利用数字全波鉴相,提高了鉴相效率,改善了鉴相效果;采用了基于自由轴伏安测量法的测量原理和四端测量技术,并用C语言实现分布参数校正.A LCR testing instrument based on FPGA is introduced. It uses FPGA to realize DDS （direct digital frequency synthesis） and creates sine wave. The sine wave is considered as test pumping signal whose waveform is good and amplitude is stable. Designing method of phase-sensitive detector is unique. Digital full wave phase detecting is applied to improve efficiency and effect of phase-sensitive detector. The volt-ampere measuring principle based on free-axis and four-terminal measuring technique are described. It also uses C language to correct distribution parameter.

关 键 词：FPGA 频率合成 自由轴法 数字鉴相器 

分 类 号：TM933[电气工程—电力电子与电力传动]