用于胃肠道微型机器人的组合螺线管式无线能量发射系统研究

为保障胃肠道微型机器人在体内稳定、可靠工作,以扩大无线能量传输系统的工作范围、提高接收能量及其稳定性为目标,研究了新型组合螺线管式无线能量发射系统。通过有限元仿真分析,确定发射线圈的最佳结构及结构参数。基于最小传输能量要求及所提出的发射线圈性能评估指标,优化确定发射线圈的匝数。研制的发射线圈尺寸为50 cm×50 cm×42 cm,较传统的亥姆霍兹线圈在轴线方向上扩大了17 cm,可以更完整的覆盖人体胃肠道区域。实验结果表明,采用边长为12 mm的三维正交能量接收线圈,在发射线圈内任意位置及姿态下,负载接收能量超过660 mW。在发射线圈非边缘区域,接收能量的位置稳定度超过了80%,能够较好的满足为胃肠道微型机器人供能的实用要求。

Research on combined solenoid wireless power transmitting system for gastrointestinal micro-robot

In order to ensure the stable and reliable work of gastrointestinal (GI) micro-robots in human body, with the goal of expanding the working range of the wireless power transfer (WPT) system, improving the received power and its stability, studies a new type of combined solenoid WPT system. Through finite element simulation analysis, the best configuration and structure parameters of the power transmitting coil ( PTC) is determined. According to the minimum power transmitting requirement and the proposed performance evaluation index of the PTC, the number of turns of the PTC is optimized and determined. The size of the fabricated PTC is 50 cm× 50 cm×42 cm, which is 17 cm larger than that of the traditional Helmholtz coil in the axial direction, the PTC can cover the human GI region more completely. The experiment results show that using a three-dimensional orthogonal power receiving coil with a side length of 12 mm, the load received power exceeds 660 mW at any positiosn and orientations inside the PTC. In the non-edge area of the PTC, the position stability of the received power exceeds 80% . The system can meet the practical requirement of power supply for gastrointestinal micro robot.