标准金属布氏硬度块测量不确定度的间接评定

摘要

Based on the national measurement verification regulation of JJG 147-2005 Brinell Hardness Reference Blocks and the national metrology calibration specification of JJF 1059.1-2012 Evaluation and Expression of Uncertainty in Measurement , a new method of indirect e-valuation of uncertainty in measurement of Brinell hardness standard blocks is proposed .A new hardness measurement model was established , a rigorous analysis was done on the measurement model , and the redundant contribution of uncertainty in measurement was eliminated in the indi -rect evaluation.According to the measurement condition and the method specified in the regulation and the specification , an indirect evaluation was made on the measurement uncertainty of the scale of (125~225) HBW10/3000/30 as an example.%基于JJG 147-2005《标准金属布氏硬度块》以及JJF 1059．1-2012《测量不确定度评定与表示》，给出了一种间接评定标准金属布氏硬度块测量不确定度的新方法。建立了硬度测量的新模型，并对该测量模型进行了较严密的分析，剔除了间接评定时，各耦合项对不确定度的重复贡献。按规程的测量条件和方法，以（125～225） HBW10／3000标尺标准块为例，对其测量不确定度进行了系统的间接评定。