量块混合测量及其测量不确定度探讨

Discussion on the Uncertainty of Gauge Block Composite Measurement

量块长度测量除直接测量和比较测量外,还存在一种混合测量。混合测量是一种除了需要与标准量块进行比较,还需直接测量量块部分长度的测量方式。这种测量方式原本很少,但随着量块比较仪示值范围的不断扩大,混合测量的使用越来越多。在使用过程中发现有一些问题会影响其测量准确度,其测量不确定度的评定有许多特别之处。简单介绍了量块的混合测量,并主要探讨了其测量不确定度。

There is a composite measurement method in addition to direct comparison and interferometry methods for gauge block measurement.The composite measurement is a method that requires both the comparison from the reference gauge block and the length of the gauge block.With the increase of the indication range of the gauge block comparator,more and more composite measurements were implemented.We have found the factors that affect the measurement accuracy,and special features involve in the evaluation of the measurement uncertainty.This paper introduces the composite measurement for the gauge block and its measurement uncertainty.