外径千分尺示值误差测量结果的不确定度评定

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【摘要】本文选用四等量块对测量范围为0~25 mm,分度值为0.01 mm的千分尺进行测量,得到千分尺的示值误差,在千分尺检定规程上查表得知,0~25 mm外径千分尺的最大允许误差为±4μm,即此千分尺示值误差≤±4μm,在此基础上对外径千分尺示值误差进行不确定度的分析与评定。

【关键词】外径千分尺;示值误差;不确定度

【DOI编码】10.3969/j.issn.1674-4977.2023.02.013

Evaluation of Uncertainty in Measurement Results of Indication Error of Outside Micrometer

JI Hong

(Xingcheng Inspection and Testing Center,Xingcheng 125100,China)

Abstract:In this paper,four equal measuring blocks are selected to measure the micrometer with a measuring range of 0~25 mm and a graduation value of 0.01 mm,and the indication error of the micrometer is obtained. According to the table on the micrometer verification regulation,the maximum allowable error of the 0~25 mm outside micrometer is±4μm. Namely,the indication error of the micrometer is≤±4μm. On this basis,the uncertainty of the indication error of the external diameter micrometer is analyzed and evaluated.

Key words:outside micrometer;indication error;uncertainty

千分尺作为常用的测量工具,由于具有测量精度高、使用便捷等优点而经常被企业用于测量工件的外形尺寸,是在我国被广泛使用的一种计量器具。(剩余2870字)

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