用于胃肠道机器人的C型组合式无线能量发射线圈的设计与实验

现有适用于胃肠道机器人的无线能量传输系统的能量传输效率低、接收功率低且接收能量的位置均匀性差，无法满足功能复杂的新型胃肠道机器人的能量需求。本文提出了一种新型C型组合式发射线圈结构，通过有限元仿真分析供能单元组的磁感应强度大小和位置均匀性，确定供能单元组中线圈对间距的实验优化范围。最后搭建实验平台，优化供能单元组中线圈对间距，通过系统的能量传输效率、接收功率以及接收功率的位置均匀度对设计进行评估与验证。实验结果表明：当线圈对间距为150 mm时，中心位置的接收功率为1 165.34 mW,系统的能量传输效率为6.08%。系统的平均功率约为1 100 mW,平均能量传输效率达6%以上，接收功率的平均位置均匀度达94%。新型C型结构磁芯以及采用同一时刻只有一个供能单元组工作的组合式线圈结构，极大地改善了系统的接收功率与能量传输效率，并有较高的接收能量的位置均匀性。

Design and experiment of C-shaped combined wireless power transmitting coilsfor the gastrointestinal capsule robot

The existing wireless energy transfer systems are suitable for gastrointestinal robot that have low energy transmission efficiency,low received power, and poor location uniformity of received energy, which cannot meet the energy requirement of new gastrointestinalrobots with complex functions. In this article, a new type of C-shaped combined transmitting coil structure is proposed. The magneticflux density of the power supply unit is analyzed by finite element simulation, and position uniformity, determine the experimentaloptimization range of the coil pair spacing in the power supply unit group. Finally, an experimental platform is established to optimize thecoil pair spacing distance in the power supply unit, and the design is evaluated and verified through the energy transmission efficiency ofthe system, the received power, and the position uniformity of the received power. Experimental results show that when the coil pairspacing distance is 150 mm, the received power at the center position is 1 165. 34 mW, and the energy transmission efficiency of thesystem is 6. 08% . The average power of the system is about 1 100 mW, the average energy transmission efficiency is over 6% , and theaverage position uniformity of the received power is 94% . By introducing a new type of C-structure magnetic core and adopting acombined coil structure in which only one power supply unit group works at the same time, the received power and energy transmissionefficiency of the system are greatly improved, and the position uniformity of received energy is high.