强激光与粒子束2017，Vol.29Issue(5)：68-74,7.DOI:10.11884/HPLPB201729.170001
脉冲高电压测量不确定度评定
Evaluation of uncertainty in measurement of high voltage pulse
摘要
Abstract
An uncertainty model has been proposed which is based on the black-box concept to evaluate the uncertainty of measurement and calibration in high voltage pulse divider.The initial model was proposed in principle, unnecessary variables in the formula could be omissible in the calibration experiment.For the model absent of uncertainty originating from calibration document, and resolving power of oscilloscope, the correction components which belong to the black-box model would be introduced to the formula to perfect the model.The uncertainties were combined after perfection of model according to the law of propagation of uncertainty.The results are compared with that combined from relative uncertainty.It is shown that the uncertainty combined from relative uncertainty will be correct if this model is only composed of multiplication and division of different variables, or addition and subtraction of different variables are also permitted if the mathematical expectation values of these items equal to zero.This is proven by calculating the voltage potential between two different positions according to the measured voltage pulse at those positions and analyzing the attenuation represented by dB scales.In the calibration experiment of high voltage divider, the combined standard uncertainty of divider's scaling factor is obtained by evaluating Type A standard uncertainty of the ratio of output to input.The influence of dispersion from signal source output on evaluation of standard uncertainty can be weakened with this method.关键词
脉冲高电压/测量/标定/不确定度Key words
high voltage pulse/measurement/calibration/uncertainty分类
信息技术与安全科学引用本文复制引用
卫兵,傅贞,任济,卿燕玲,丰树平..脉冲高电压测量不确定度评定[J].强激光与粒子束,2017,29(5):68-74,7.基金项目
国家自然科学基金项目(11575167,11505171) （11575167,11505171）
