一、引言众所周知,无测量误差的测量是没有的。每一个测量结果,不论对它的系统误差进行修正与否都是无关紧要的,在最好的情况下,总会有一定数量的不正确性,就把这一数量称为测量不确定度。测量不确定度由偶然的以及因为不参与修正而进行估计的系统误差组成。这种误差的来源在于被测对象的不完善性,测量仪器和量具的误差,由于环境及 I. Introduction As we all know, no measurement error measurement is not. Every measurement, regardless of its systematic error correction is irrelevant, in the best case, there will always be a certain number of incorrect, put this number called measurement uncertainty. The measurement uncertainty consists of systematic errors estimated by chance and by not participating in the correction. The source of this error lies in the imperfection of the measured object, measuring instruments and measuring errors, due to environmental and