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中文摘要：
针对人体消化道内微小系统,提出了利用电磁耦合进行无线能量传输的方法.体外发射线圈围绕在腰间,产生交变磁场,体内微小接收线圈产生感应电压,两线圈耦合从而实现能量传输.基于线圈耦合电路模型,推导了弱耦合条件下能量传输效率公式和效率最大化条件.对比分析了两种电路结构,给出了提高能量传输效率的根本途径.实验验证了方案的可行性和能量传输效率公式的正确性.结果表明,200 mW功率能够可靠传输,效率达1.31%.
英文摘要：
A wireless power transmission method based on electromagnetic coupling was put forward for gastrointestinal microsystems. The outside transmitting coil winding around waist produces variable magnetic field. The implanted micro receiving coil induces voltage. Thus two coupling coils transfer energy. The function of power transmission efficiency was deduced based on lumped weak coupling link model; and the maximizing conditions were achieved. Parallel resonant circuit （PRC） and serial resonant circuit （SRC） topology on receiving side were compared. Two essential ways to improve transmission efficiency were pointed out. The experiments validate the feasibility of the method and the correctness of the power trans mission efficiency formula. DC power level up to 200 mW can be steadily received at efficiency of 1.31% in the experiments.
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