Magnetic field distribution and design of Helmholtz coils
Magnetic field distribution and design of Helmholtz coils
复制标题
亥姆霍兹线圈的磁场分布与设计
DOI：
10.21236/ada242978
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发表时间：
1991
影响因子：
4.6
通讯作者：
J. Vrbancich
中科院分区：
文献类型：
--
作者：
J. Vrbancich
文摘：磁感应传感器线圈的校准需要均匀的磁场。考虑了两种类型的线圈设计：单个有限长度螺线管和同轴分离式线圈对(亥姆霍兹线圈)。设计必须能够可靠地预测校准场的大小及其均匀程度，径向和轴向均在一定的公差范围内。给出了一种基于分裂线圈对的设计的实验结果。此外，还提出了通过缩小常规Helmholtz线圈对间距的方法，可以有效地扩展分裂线圈对中面的准均匀场。在这种情况下，由于大于和小于中心场的场之间的部分抵消，中面圆形区域的通量可以接近完全均匀场的值。文中还讨论了无限长螺线管中心场的偏离问题。(作者)
Abstract : A uniform magnetic field is required to calibrate magnetic induction sensor coils. Two types of coil designs are considered; a single finite length solenoid and a coaxially split coil pair (Helmholtz coil). The design must be able to reliably predict the magnitude of the calibration field and its homogeneity, both radially and axially, to within certain tolerances. The experimental results of a design based on the split coil pair are given. Furthermore, it is suggested that the quasi-uniform field in the mid-plane of a split coil pair can be usefully extended by narrowing the gap of the conventional Helmholtz coil pair spacing. In such cases, the flux in a circular region in the mid-plane can approach the value that would exist for a perfectly uniform field because of the partial cancellation between fields greater than and less than the central field. The deviation of the central field from that of an infinitely long solenoid is also discussed. (Author)