Development of 2 N dead-weight type force standard machine
Development of 2 N dead-weight type force standard machine
复制标题
2N自重式力标准机的研制
DOI：
10.1016/j.measurement.2019.107463
复制
发表时间：
2020
期刊：
影响因子：
5.6
通讯作者：
K. Ogushi
中科院分区：
文献类型：
--
作者：
Junfang Zhu;T. Hayashi;A. Nishino;K. Ogushi
日本国家计量研究所（NMIJ，AIST）研制了一种2N自重式力标准机（2N DWM），该力标准机配备了平衡机构以抵消作用在加载框架上的重力。根据校准力的步骤选择标准砝码，并将其放置在砝码加载机构上。可以实现的最小力为10 mN。覆盖因子k = 2的实现力的相对扩展不确定度在力阶跃为10 mN和200 mN时分别为5.8 × 10− 4和2.9 × 10− 5。使用2 N力传感器在100 mN-2 N范围内评价重复性。随着该标准机的发展，NMIJ发布的力标准扩展到10 mN。我们认为，我们的工作可以进一步促进部队标准的发展。
A 2 N dead-weight type force standard machine (2 N DWM) equipped with a balancing mechanism to cancel out the gravitational force acting on the loading frame is developed by National Metrology Institute of Japan (NMIJ), AIST. Removable standard weights are selected in accordance with the calibration force steps and placed onto a weight-loading mechanism. The minimum force that can be realized is 10 mN. The relative expanded uncertainties of the realized forces with coverage factork= 2 are evaluated as 5.8 × 10−4and 2.9 × 10−5at force steps of 10 mN and 200 mN, respectively. Repeatability is evaluated in the range of 100 mN–2 N with the use of a 2 N force transducer. With the development of this standard machine, the force standards disseminated from NMIJ extend down to 10 mN. We believe that our work can further contribute to developments in force standards.