基于3等量块和电脑量块比较仪检定4等量块中心长度的可行性分析  

Feasibility Analysis of Verifying the Central Length of the 4⁃level Gauge Block Based on the 3⁃level Gauge Block and a Computer Gauge Block Comparator

作　　者：吕艳 LYU Yan

机构地区：[1]中国铁路济南局集团有限公司计量所,山东济南250001

出　　处：《铁道技术监督》2024年第10期21-24,30,共5页Railway Quality Control

摘　　要：为了验证由主标准器3等量块和辅助设备电脑量块比较仪构成的3等量块标准装置检定4等量块中心长度的可行性,分析3等量块标准装置检定原理、数学模型和操作步骤。依据JJG 146—2011《量块检定规程》,检定4等量块中心长度,并评定检定结果测量不确定度。结果表明,长度为50 mm的4等量块中心长度检定结果扩展测量不确定度为0.23μm,小于其测量不确定度要求0.30μm,3等量块标准装置测量结果符合JJG 146—2011中规定,满足量值传递要求,可利用其检定4等量块中心长度。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.

关 键 词：量块 中心长度 检定装置 电脑量块比较仪 测量不确定度评定 

分 类 号：TB921[一般工业技术—计量学]