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Critical Coupling Magnetic Moment of a Petal-Shaped Capsule Robot

机译:花瓣形胶囊机器人的临界耦合磁矩

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摘要

Actuated by spatial universal rotating magnetic vector through digital control, the steering navigation of the spiral-type capsule robot in the gastrointestinal (GI) tract becomes possible. However, as a potential risk, the fluid resistance torsion moment generated by the rotating spiral-type capsule robot would distort the GI tract with insufficient fluid. It is difficult to investigate the fluid distorting effect on the GI tract, because online measurement of the fluid resistance torsion moment still remains unsolved. In this paper, an innovative method employing critical coupling magnetic moment for indirectly detecting the fluid resistance torsion moment is proposed. To reduce fluid distorting effect, a petal-shaped capsule robot, whose surface is composed of four petal-shaped tiles, is proposed, and fluid resistance torsion moment-weaken effect of the petal-shaped capsule robot is discovered and investigated, which happens to the fluid when it travels through a convergent wedge-like gap between the surface of each of the four petal-shaped tiles and the inner pipe wall. Simulations and experiments have demonstrated that the twist impact on the GI tract by the petal-shaped capsule robot is reduced, while the non-contact driving performance in the GI tract is improved greatly isolated by fluid membrane with high dynamic pressure.
机译:通过数字控制通过空间通用旋转磁矢量进行驱动,螺旋型胶囊机器人在胃肠道中的转向导航成为可能。然而,作为潜在的风险,由旋转的螺旋型胶囊机器人产生的流体阻力扭矩会在流体不足的情况下扭曲胃肠道。由于对流体阻力扭转力矩的在线测量仍未解决,因此很难研究流体对胃肠道的扭曲作用。提出了一种采用临界耦合磁矩间接检测流体阻力扭转力矩的创新方法。为了减小流体变形的影响,提出了一种表面由四个花瓣形的瓷砖组成的花瓣形的胶囊机器人,并研究了花瓣形的胶囊机器人的流体阻力扭转矩弱化效应,并在此基础上进行了研究。当流体流过四个瓣状瓷砖的每一个的表面和内管壁之间的会聚楔形间隙时,流体会流动。仿真和实验表明,花瓣形胶囊机器人减小了扭曲对胃肠道的冲击,而动压高的流体膜大大隔离了胃肠道中的非接触驱动性能。

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