1. China Jiliang University, Hangzhou, Zhejiang 310018, China
2. Institute of Energy Measurement Technology,Anhui Institute of Metrology,
Hefei, Anhui 230009, China
3. Zhejiang Testing&Inspection Institute for Mechanical and Electrical Products Quality Co. Ltd, Hangzhou, Zhejiang 310051, China
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.
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2023, Vol. 44 
