摘要
高准确度质量测量时需要修正由于被测砝码与标准砝码质心高度差引入的质量差值,因此需要测量质量标准的质心高度。质心高度可通过将质量标准按不同朝向放置在称量桥的不同位置,根据质量测量仪器的示值变化计算得到。研究了2种质心高度测量方法的不确定度评定,分析了各不确定度来源,给出了不确定度评估方法,并结合实例进行了讨论。
Highly accurate mass measurements require correction of mass differences introduced by the difference in center-of-mass height between the measured weight and the reference weight and therefore require measurement of the center-of-mass height of the mass standard.The center-of-mass height can be obtained by placing the mass standard in different positions on the weighing bridge with different orientations and calculating the change in the indicated value of the mass measurement instrument.In this paper,the uncertainty assessment of the 2 center-of-mass height measurement methods is studied,the source of each uncertainty is analyzed,the uncertainty evaluation method is given and discussed in conjunction with examples.
作者
钟瑞麟
吴頔
王健
蔡常青
陈杭杭
胡满红
焦凯
丁京鞍
ZHONG Ruilin;WU Di;WANG Jian;CAI Changqing;CHEN Hanghang;HU Manhong;JIAO Kai;DING Jing’an(National Institute of Metrology,Beijing 100029,China)
出处
《计量科学与技术》
2021年第5期120-123,131,共5页
Metrology Science and Technology
基金
中国计量科学研究院基本科研业务费项目(AKYZD2005-2-20)
国家自然科学基金-面上项目(52075515)。
关键词
质量标准
质心
称量桥
不确定度
质量测量
mass standard
center of mass
weighing bridge
uncertainty
mass measurement
