Design and Implementation of a New Type of Gastrointestinal Robot Wireless Power Transmission System

doi:10.16183/j.cnki.jsjtu.2021.228

Abstract

Abstract:

In order to ensure the stable operation of the miniature gastrointestinal robot inside the human body, a new type of wireless power transmission (WPT) system is presented. To fulfill the requirements of the work energy consumption, posture stability, energy supply stability, and size limitation of the intestinal robot, the design refers to the calculation of electromagnetic field theory and the optimization results of the spindle-shaped three-dimensional receiving coil model which based on the principle of electromagnetic field resonance. Accordingly, the transmitting coil adopts four sets of solenoid coils to generate a uniform alternating magnetic field. With the receiving coil integrated inside, the optimized transmitting coil can generate a stable energy greater than 500 mW for a robot to work through mutual inductance. Relevant experimental verification indicates that performance of the wireless energy supply system satisfies the working requirements of the robot in the complex environment inside the intestine.

Key words: wireless power transmission (WPT), three-dimensional receiving coil, combined solenoid transmitting coil

CLC Number:

TH776

FU Wenhao, JIANG Pingping, YAN Guozheng, PENG Yuqi, FEI Qian, ZHUANG haoyu. Design and Implementation of a New Type of Gastrointestinal Robot Wireless Power Transmission System[J]. Journal of Shanghai Jiao Tong University, 2022, 56(8): 1057-1066.

Figures/Tables 17

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Tab.1

Magnetic field uniformity index of three kinds of transmitting coils

发射线圈结构	$B -$ ×10⁶/T	δ×10⁶/T	c_v/%
2组螺线管线圈	6.17	1.40	22.69
3组螺线管线圈	10.99	1.96	17.83
4组螺线管线圈	8.51	1.08	12.69

Tab.1

Fig.7

Fig.8

Fig.9

Tab.2

Fig.10

Tab.3

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Fig.14

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线圈类型	匝数	等效串联电阻/Ω	电感/μH	Q
发射线圈	66	1.07	568.7	731
接收线圈组1	75	4.97	241.1	67.5
接收线圈组2	75	6.29	269	61.1
接收线圈组3	75	5.67	277.5	70.2

y/cm	标准差
y/cm	接收功率/mW	接收效率/%
0	85.16	0.1094
5	75.40	0.0957
10	80.70	0.1000
15	97.82	0.1297
20	244.05	0.3087