背景磁场对测G实验中扭秤的作用力矩  

The Influence of Ambient Magnetic Field on the Torque of Torsion Balance

作　　者：刘琳霞[1] 邓罡[2] 

机构地区：[1]河南机电高等专科学校电子通信工程系,河南新乡453002 [2]湖北工业大学理学院,武汉430068

出　　处：《河南师范大学学报（自然科学版）》2012年第4期62-64,共3页Journal of Henan Normal University(Natural Science Edition)

摘　　要：在周期法测量万有引力常数G的实验中,扭秤所处环境的磁场分布非常复杂.本文通过一定的理论模型,计算了磁场对扭秤的作用力矩.计算结果显示,扭秤受到的力矩与磁场的梯度和恒定磁场的大小有关,且力矩包括恒定的和随时间周期变化的两部分.In the time-of-swing method of measuring G, the distributions of the ambient magnetic are very complicated. In this paper, the magnetic field on the torque of torsion balance is calculated through a certain theoretical model. The computa- tion results show that the magnetic torque of torsion balance is related to the magnetic field gradient and the size of constant magnetic field. And the magnetic torque includes two parts, the constant torque and with time periodically changing torque.

关 键 词：扭秤 背景磁场 磁场力矩 

分 类 号：O314[理学—一般力学与力学基础]