摘要
为满足微安级直流信号精密测量的需求,设计研制一种精确测量微安直流的全数字化磁调制器。其通过将激励端与输出端电压转换成数字信号,再进行傅里叶分析,矢量法调零与比例系数校正后实时获取直流测量值。测量结果表明,在测量范围为5μA～1 000μA时,精度可达到0. 5%,线性误差优于2×10^(-4),且有效抑制激励源频率与幅值变化导致的测量误差。
In order to meet the requirements of precision measurement of micro-amplitude DC signals,a fully digital magnetic modulator for accurately measuring micro-ampere DC is designed in this paper.It converts the excitation terminal and the output terminal voltage into digital signals,and then,performs Fourier analysis,vector method zero adjustment and proportional coefficient correction to obtain DC measurement values in real time.The measurement results show that the accuracy can reach 0.5%and the linear error is better than 2×10-4 when the measurement range is 5μA-1 000μA,and the measurement error caused by the excitation source frequency and amplitude variation is effectively suppressed.
作者
周磊
官志涛
李红斌
陈庆
姚雅涵
Zhou Lei;Guan Zhitao;Li Hongbin;Chen Qing;Yao Yahan(School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《电测与仪表》
北大核心
2019年第7期131-136,141,共7页
Electrical Measurement & Instrumentation
基金
国家重点研发计划资助项目(2016YFF0102400)
关键词
微安级直流
磁调制器
全数字化
micro-amplitude DC
magnetic modulator
full digitalization
作者简介
周磊(1996—),男,本科生,从事电磁量传感器研究。Email:1073215131@qq.com;官志涛(1996—),男,本科生,从事电磁量传感器研究;李红斌(1967—),女,教授,从事电磁量传感器研究;陈庆(1979—),男,副研究员,从事电磁量传感研究;姚雅涵(2000—),女,本科生,从事电磁量传感研究。
