面向胶囊内镜的无线能量传输系统设计OA

A wireless power transfer system is designed to address energy supply challenges in capsule endoscopy.Biological safety is ensured by incorporating specific absorption rate(SAR)and retained power as dual constraints.On the transmitter side,a one-dimensional Helmholtz coil with a diameter of 20 cm was designed.Through theoretical calculation and simulation analysis,the design parameters were optimized under the SAR constraints.A full-bridge inverter circuit was employed to drive the coil at 218 kHz,ultimately achieving stable excitation of a highly uniform magnetic field.On the receiver side,a three-dimensional orthogonal coil structure measuring Φ10.14 mm×15.2 mm was designed.With the goal of maximizing received power,its design parameters were optimized under the power deposition constraints.Furthermore,the induced electromotive force was regulated through rectification and voltage stabilization stages,thereby maximizing the received power.Experimental validation confirms the system safely sustains 450 mW LED illumination or drives dual micro-motors(20.41 mN·m torque,40 r/min)while maintaining SAR compliance.The proposed system offers a reliable technical framework for wireless energy transfer in capsule endoscopic applications.