In order to verify the feasibility of using the 3-level gauge block standard device consisting of 3-level gauge block as the main standard instrument and computer gauge blocks comparator as the auxiliary equipment to verify the central length of the 4-level gauge block,the principle,mathematical model and operation steps of verifica-tion using the 3-level gauge block standard device are analyzed.According to JJG 146-2011 Verification regulation of gauge blocks,the central length of 4-level gauge block is verified,and the measurement uncertainty of the verifica-tion results is evaluated.The results show that the extended measurement uncertainty of the verification results of the central length of 4-level gauge block with a length of 50 mm is 0.23µm which is less than the required measurement uncertainty of 0.30µm.The measurement results of the 3-level gauge block standard device comply with the provi-sions of JJG 146-2011,and meet the requirements of dissemination of quantity value.The 3-level gauge block stan-dard device can be used to verify the centeal length of the 4-level gauge block.
Gauge BlockCentral LengthVerification DeviceComputer Gauge Block ComparatorEvaluation of Measurement Uncertainty
万方数据
维普
