Abstract
There are two data-processing requirements, that the best estimate value of true measured value and reliability of estimates for the best estimate value of true value.the central idea of traditional data processing is "measurement inaccuracy". As the understanding in measurement developmented,the limitation occurred in "measurement inaccuracy". The limitation in "measurement inaccuracy" mainly express in these two aspects ,that can't get true value indeed and the rule for calculate "measurement inaccuracy" is different between the universities.Produced the present experimental data processing method----- measurement Uncertainty.
Measurement Uncertainty include type A and type B evaluation of uncertainty. we combined them to gain combined standard uncertainty. So as to increse the reliability for the best estimate value of true measured value,comes expanded uncertainty. The uncertainty that Increase the confidence level is expanded uncertainty .
According to the data of the central idea of this article, For basic physics experimental data processing, introduced the concept of uncertainty and uncertainty assessment .Through list many examples, Understand that how to use the experimental uncertainty of the measurement of basic physical data correctly.
Keywords: data processing;uncertainty; The classification of measurement uncertainty;model.
