The state-of-the-art wireless positioning and wireless charging using magnetic coupling designed for wireless capsule endoscopy (WCE) require different magnetic field distributions and system structures. Due to the space and weight constraints of WCE, designing a system that achieves wireless positioning and wireless charging simultaneously becomes an emerging problem. A switched field structure based on the Helmholtz coils is proposed in this article to provide a gradient field distribution for wireless positioning and uniform field distribution for wireless charging by switching the excitation mode of the Helmholtz coils. Focusing on the wireless positioning function, the gradient mode of the Helmholtz coils is able to achieve a millimeter-level positioning accuracy and a degree level orientation accuracy along the $z$ -axis within the effective space. The proposed method provides a feasible way to achieve wireless positioning and charging using the same system structure to meet the requirements of wireless capsule endoscopy and other related biomedical and industrial applications.

中文翻译：

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用于无线胶囊内窥镜的具有开关场亥姆霍兹线圈的混合无线定位和充电

为无线胶囊内窥镜 (WCE) 设计的最先进的使用磁耦合的无线定位和无线充电需要不同的磁场分布和系统结构。由于WCE的空间和重量限制，设计一个同时实现无线定位和无线充电的系统成为一个新兴的问题。本文提出了一种基于亥姆霍兹线圈的切换场结构，通过切换亥姆霍兹线圈的激励模式，为无线定位提供梯度场分布，为无线充电提供均匀场分布。专注于无线定位功能，亥姆霍兹线圈的梯度模式能够在有效空间内沿$z$轴实现毫米级定位精度和度级定向精度。所提出的方法为使用相同的系统结构实现无线定位和充电提供了一种可行的方法，以满足无线胶囊内窥镜和其他相关生物医学和工业应用的需求。