随着电磁兼容认证的普及,关于电磁兼容领域测量不确定度的讨论日益增多。目前就电磁兼容试验关于对数单位、线性单位的使用上仍存在着争议,GUM中也没有涉及到对数单位评定的参考标准。针对这一现状,通过对数正态与线性正态的讨论,得出一个与对数单位标准差、测量次数取值相关的安全系数估计t。以对数单位评定的均值为最终基准,安全系数可将对数正态分布评定区间扩展,令评定结果在尽可能小地扩大的基础上,能完整囊括线性单位的评定结果,达到消除评定结果中线性单位与对数单位争议的效果,使得不确定度结果更安全、可靠。
Abstract
With the popularization of electromagnetic compatibility certification, the discussion on measurement uncertainty in the electromagnetic compatibility field is increasing.At present, there are still controversies about the use of logarithmic units and linear units in electromagnetic compatibility tests, and there is also no reference standard for the evaluation of logarithmic units in GUM.In view of this situation, through the discussion of lognormal and linear normal, a safety factor estimate t related to the logarithmic unit standard deviation and the value of the number of measurements is obtained.Taking the mean value of the logarithmic unit evaluation as the final benchmark, the safety factor can extend the evaluation interval of the lognormal distribution, so that the evaluation result can be expanded as small as possible, and the evaluation result of the linear unit can be fully included.After eliminating the dispute between the linear unit and the logarithmic unit in the evaluation result, the uncertainty result is safer and more reliable.
关键词
计量学 /
电磁兼容 /
安全系数估计 /
不确定度 /
对数评定法 /
重复性
Key words
metrology;electromagnetic compatibility /
estimation of safety coefficient /
uncertainty /
logarithmic evaluation;repeatability
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基金
国家市场监督管理总局科技计划(2021MK188); 浙江省自然科学基金(LY22E050005)
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