International comparison and proficiency tests of short gauge blocksHAN Li-jiang, HE Xiao-yan Shanxi Institute of Metrology, Xi＇ an 710048, China）HAN Li-jiang, HE Xiao-yan Shanxi Institute of Metrology, Xi＇ an 710048, ChinaAbstract:The technical criterion and the short gauge blocks were provided by the international comparison institute APLAC. The authors successfully completed this international comparison of short gauge blocks with the comparative measurement theory. And the mathematical model for evaluating the measurement uncertainty was also built. The evaluated measurement uncertainty was less than that of former domestic measurements when the confidence probability is 95% and the coverage factor k is 2 according to the general international requirements. This international comparison proved the valid and reliable of our test data, and this measurement uncertainty evaluation method has been accepted by APLAC.[著者文摘]
Key words:Short gauge block; International comparison; Mathematical model; Measurement uncertainty