探究了一种新型三维接收线圈结构，以满足肠道机器人在人体内正常工作的功率需求，解决了机器人在人体内姿态随机变化带来的失谐问题.该三维接收线圈每个维度绕制方式相同，各个维度的接收功率相对稳定.从磁芯直径、线圈匝数与线径3个方面，通过一系列对比实验分析结构参数对传输效率和传输功率的影响.对优化接收线圈进行姿态稳定性分析.结果表明：最优接收线圈结构为磁芯直径6mm、线圈匝数80、线圈线径0.12mm.当发射线圈的驱动电压为10V时，该优化接收线圈的最大传输功率为 1216mW，此时无线供能系统的传输效率为6.64%.在不同姿态角下，接收线圈3个维度方向产生的最大传输功率几乎相同.当绕x轴转动角α=45°，绕y轴转动角β=45°时，三维线圈输出最小功率，约为527mW，该功率可使机器人基本维持正常工作.
A novel three-dimensional receiving coil structure is designed to meet the power requirements of intestinal robot and to solve the detuning problem caused by random changes of robot posture in human body. Each dimension of the three-dimensional receiving coil is wound in the same way, and the receiving power of each dimension is relatively stable. The influence of the structural parameters on transmission efficiency and power is analyzed through a series of comparative experiments from core diameter, coil turns, and wire diameter. The attitude stability of the optimized receiving coil is analyzed. The results show that the best receiving coil has a magnetic core diameter of 6mm, a number of coil turns of 80, and a coil wire diameter of 0.12mm. When the driving voltage of the transmitting coil is 10V, the maximum transmission power of the optimized receiving coil is 1216mW, and the transmission efficiency of the wireless power supply system is 6.64%. At different attitude angles, the maximum transmitted power generated by the three dimensions of the receiving coil is almost the same. The three-dimensional coil outputs a minimum power of about 527mW when α=45° and β=45°, which allows the robot to basically maintain normal operation.
［1］国家卫生健康委员会. 中国卫生健康统计年鉴［M］. 北京: 中国协和医科大学出版社, 2018.
National Health Commission of the People’s Republic of China. China’s annual statistical yearbook on health and family planning［M］. Beijing: Peking Union Medical College press, 2016.
［2］马官营, 颜国正, 王文兴. 微型诊疗系统无线供能技术及其生物电磁效应研究［J］. 北京生物医学工程, 2013, 32(4): 347-352.
MA Guanying, YAN Guozheng, WANG Wenxing. Wireless power transmission of microsystem and bioelectromagnetic effects［J］. Beijing Biomedical Engineering, 2013, 32(4): 347-352.
［3］李达伟, 姜萍萍, 柯全, 等. 肠道机器人无线能量发射系统优化设计［J］. 上海交通大学学报, 2018, 50(9): 1031-1037.
LI Dawei, JIANG Pingping, KE Quan, et al. Optimal design of wireless power transfer system for gastrointestinal robots［J］. Journal of Shanghai Jiao Tong University, 2018, 50(9): 1031-1037.
［4］CARTA R, SFAKIOTAKIS M, PATEROMICHELAKIS N, et al. A multi-coil inductive powering system for an endoscopic capsule with vibratory actuation［J］. Sensors and Actuators A: Physical, 2011, 172(1): 253-258.
［5］GAO J Y, YAN G Z, WANG Z W, et al. A capsule robot powered by wireless power transmission: Design of its receiving coil［J］. Sensors and Actuators A: Physical, 2015, 234(1): 133-142.
［6］MA G, YAN G Z, HE X. Power transmission for gastrointestinal microsystems using inductive coupling［J］. Physiological Measurement, 2007, 28(3): 9-18.
［7］PUERS R, CARTA R, THONE J. Wireless power and data transmission strategies for next-generation capsule endoscope［J］. Journal of Micromechanics and Microengineering, 2011, 21(5): 2703-2712.
［8］JIA Z W, YAN G Z, JIANG P P, et al. Efficiency optimization of wireless power transmission systems for active capsule endoscope［J］. Physiological Mea-surement, 2011, 32(10): 1561-1573.
［9］贾智伟, 颜国正, 石煜, 等. 胶囊内窥镜的无线能量传输系统优化设计［J］. 电子测量与仪器学报, 2011, 25(12): 1060-1065.
JIA Zhiwei, YAN Guozheng, SHI Yu et al. Optimal design of wireless power transmission system for capsule endoscopes［J］. Journal of Electronic Measurement and Instrument, 2011, 25(12): 1060-1065.
［10］GAO J Y, YAN G Z, SHI Y B, et al. Analysis of connection way of a three-dimensional receiving coil onboard a capsule robot for wireless power transmission［J］. Progress in Electromagnetics Research M, 2019, 78(10): 39-48.
［11］GIMM Y M., YOO H S, KIM M J, et al. Receiving coil analysis of wireless power transmission with inductive coupling［J］. Korea-Japan Microwave Conference, 2007, 21(5): 231-248.
［12］杨凯, 颜国正, 高晋阳. 胶囊机器人无线能量传输系统设计［J］. 北京生物医学工程, 2016, 35(5): 510-515.
YANG Kai, YAN Guozheng, GAO Jinyang. Design of wireless power supply system for robotic capsule［J］. Beijing Biomedical Engineering, 2016, 35(5): 510-515.
［13］KE Q, LUO W J, YAN G Z, et al. Analytical model and optimized design of power transmitting coil for inductively coupled endoscope robot［J］. Transactions on Biomedical Engineering, 2016, 63(4): 694-706.
