螺旋式微型机器人, 无损伤, 结构参数, 计算流体力学

A non-invasive spiral medical micro-robot was introduced. When it was driven in the human intestines, dynamics control equations of intestinal fluid were established. By computational fluid dynamics method, the relations between different robotic structural parameters (angle α, the ratio between groove face width and pitch β1, the ratio between groove bottom width and pitch β2, the ratio between groove depth width and radius clearance γ, spiral angle Φ and thread number n) and impact pressures of human intestinal wall produced by the micro-robot were calculated and analyzed in the circumstances of cylindrical forward and reverse rotation. The optimal robotic structural parameters were obtained. The above theoretical analysis results provide an essential theoretical basis for the optimization design of a high-speed rotating spiral medical micro-robot really applied to non-invasive or mini-invasive surgery of human intestines.