Development of a nano-torque generating machine using electromagnetic force based on the principle of the Kibble balance
Development of a nano-torque generating machine using electromagnetic force based on the principle of the Kibble balance
复制标题
基于基布尔平衡原理的利用电磁力的纳米扭矩发生机的研制
DOI：
10.1016/j.measurement.2022.111081
复制
发表时间：
2022
期刊：
影响因子：
5.6
通讯作者：
Kinoshita Moto
中科院分区：
文献类型：
--
作者：
Nishino Atsuhiro;Kinoshita Moto
在本研究中，我们开发了一种扭矩发生机，使用基于基布尔平衡法的原理的电磁力，以实现可追溯到国际单位制（SI）的纳米扭矩。为了实现纳米扭矩，矩形线圈的尺寸和匝数以及磁通密度必须减小。然而，当磁通密度降低时，人们担心地磁等因素的影响。因此，我们首先使用基于量子力学的方法评估了这些因素对机器的影响。结果发现，地磁对设备的影响最大约为亥姆霍兹线圈形成的磁场的1%。此外，在纳米扭矩实验期间，地磁场的变化被发现是非常小的。由电磁力实现的扭矩在约0.2nN·m至lmN·m的范围内。此外，对实现扭矩的不确定度进行了评价。最后，利用电磁力成功实现了SI可追踪的纳米扭矩。
In the present study, we developed a torque generating machine using an electromagnetic force based on the principle of the Kibble balance method in order to realize a nano-torque traceable to the International System of Units (SI). In order to realize a nano-torque, the size and number of turns of the rectangular coil as well as the magnetic flux density must be reduced. However, when the magnetic flux density is reduced, there is concern about the influence of geomagnetism and other factors. Therefore, we first evaluated the influence of such factors on the machine using a method based on quantum mechanics. As a result, it was found that the influence of geomagnetism on the device is approximately 1 % of the magnetic field formed by the Helmholtz coil at maximum. In addition, the variation of the geomagnetic field during the time of the nano-torque experiment was found to be very small. The torque realized by an electromagnetic force was in the range of approximately 0.2 nN·m to 1 mN·m. Furthermore, the uncertainty in the realized torque was evaluated. Finally, an SI-traceable nano-torque was successfully realized using an electromagnetic force.