任何测量系统测试的目的,都是要得出被测量的真实值。但在实际中,要想获得被测量的真实值是不可能的,衡量测量结果质量的重要指标是测量参量的不确定度。在检测实验室由于测量不确定度来源比较复杂,如何对测量不确定度进行严密、有效计算,进行不确定度的评定与表示。本文结合实 The purpose of any measurement system test is to derive the true value of the measurement. However, in practice, it is impossible to obtain the true value of the measurement. An important index for measuring the quality of the measurement is the uncertainty of the measurement parameter. In the testing laboratory, due to the complicated sources of measurement uncertainty, how to carry out strict and effective calculation of measurement uncertainty, the evaluation and indication of the uncertainty are carried out. This article combines reality