Driving Method of an Endoscopic Robot Capsule by External Magnetic Field
JIAN Xiao-yun1,2, MEI Tao1, WANG Xiao-hua1
1. Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, China; 2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
简小云, 梅涛, 汪小华. 胶囊内窥镜机器人的外磁场驱动方法[J]. 机器人, 2005, 27(4): 367-372..
JIAN Xiao-yun, MEI Tao, WANG Xiao-hua. Driving Method of an Endoscopic Robot Capsule by External Magnetic Field. ROBOT, 2005, 27(4): 367-372..
Abstract：This paper deals with the actuation of magnetic endoscopic robot capsule by external magnetic field. We combine the gradient coils with the homogeneous coils, and then adjust their current-loads and rotational movement around a translatable patient bed, so as to compose a particular magnetic field of which the spatial gradient is uniform and the low-intensive area can be adjusted dynamically. The magnetic field acts on the permanent magnet embedded in the capsule, and generates the desired drive force and aiding torque. The simulation indicates that the particular magnetic environment caused by the combined coils is beneficial to drive the robot. The proposed driving method has good controllability and safety, and lays a foundation for studying micro-robots drived by external gradient magnetic field in various tracts.
[1] Iddan G, Meron G, Glukovsky A, et al. Wireless capsule endoscopy [J]. Nature, 2000, 405(6785): 417. [2] Meron G D. The development of the swallowable video-capsule (M2A) [J]. Gastrointest Endosc, 2000, 52(6): 812-819. [3] 付国强,梅涛,孔德义,等.无线微型机器人肠道内窥镜系统中图像采集与无线传输子系统的设计[J].光学精密工程,2002,10(6):614-618. [4] Meng Q H, Mei T, Pu J X, et al. Wireless robotic capsule endoscopy: state-of-the-art and challenges [A]. Proceedings of the 5th World Congress on Intelligent Control and Automation[C]. USA:IEEE, 2004. 5561-5565. [5] Fukuda T, Hosokai H, Ohyama H, et al. Giant magnetostrictive alloy(GMA) applications to micro mobile robot as a micro actuator without power supply cables[A]. Proceedings of the 1991 IEEE Micro Electro Mechanical Systems [C]. USA: IEEE, 1991. 210-215. [6] Sendoh M, Ishiyama K. Fabrication of magnetic actuator for use in a capsule endoscope[J]. IEEE Transactions on Magnetics, 2003, 39(5): 3232-3234. [7] 张宝裕,刘恒基.磁场的产生[M].北京:机械工业出版社,1987. [8] Turner R. Gradient coil design: a review of methods [J]. Magnetic Resonance Imaging, 1993, 11(7): 903-920. [9] 储岳森,郑杰,鲍胜浩.核磁共振成像系统梯度线圈的设计[J].上海交通大学学报,1996,30(7):34-39.
