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.
WEN Yani, YAN Guozheng, WANG Zhiwu, JIANG Pingping, XUE Rongrong, WANG Yiyun
. Design and Optimization of Three-Dimensional Receiving
Coils for Intestinal Robots[J]. Journal of Shanghai Jiaotong University, 2020
, 54(11)
: 1117
-1123
.
DOI: 10.16183/j.cnki.jsjtu.2019.179
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