电测与仪表2017，Vol.54Issue(12)：96-99,4.
数字采样卡线性误差校准
The linearity errors calibration of wideband digitizer
杨秀丽 1王学伟 1潘仙林 2张江涛2
作者信息
- 1. 北京化工大学 信息科学与技术学院,北京 100029
- 2. 中国计量科学研究院,北京 100029
- 折叠
摘要
Abstract
Digital sampling technology is widely used in the field of electrical metrology in recent years.Not only the amplitude errors and phase angle errors of two signals need to be determined,but also the linearity errors of sampling at different input voltages need to be calibrated accurately in establishment of the national high frequency AC power standard.In this paper,a method that using inductive voltage divider (IVD) as the reference to calibrate the linearity errors of two channels of digitizer has been proposed.The method achieves accurate measurements of linearity errors of amplitude and phase angle for high-precision digitizer NI 5922 at frequencies up to 100 kHz by developing the 2n:1 IVD which can be self-calibrated.Experimental results show that the digitizer amplitude linearity errors are less than 60 μV/V,and phase angle linearity errors are less than 120 μrad at input voltage from 0.004 V to 1.024 V.关键词
线性误差/感应分压器/数字采样/幅值误差/相位误差Key words
linearity errors/IVD/digital sampling/amplitude errors/phase angle errors分类
信息技术与安全科学引用本文复制引用
杨秀丽,王学伟,潘仙林,张江涛..数字采样卡线性误差校准[J].电测与仪表,2017,54(12):96-99,4.
