基于混合磁负超材料的心脏起搏器无线供能系统  

Wireless Energy Supply System for Cardiac Pacemaker Based on Hybrid Mu-Negative Metamaterials

作　　者：陈伟华[1] 侯海涛 闫孝姮[1] 陈宏强 叶智权 Chen Weihua;Hou Haitao;Yan Xiaoheng;Chen Hongqiang;Ye Zhiquan(Faculty of Electrical and Control Engineering Liaoning Technology University,Huludao 125000 China)

机构地区：[1]辽宁工程技术大学电气与控制工程学院,葫芦岛125000

出　　处：《电工技术学报》2023年第4期865-878,共14页Transactions of China Electrotechnical Society

基　　金：2020年辽宁省教育厅科学研究青年科技人才“育苗”资助项目(LJ2020QNL019)。

摘　　要：针对心脏起搏器无线供能系统传输效率低、抗偏移能力差的问题,该文提出一种基于混合磁负超材料的心脏起搏器无线供能系统。首先,根据磁负超材料的谐振原理、品质因数理论,设计了两种谐振频率的磁负超材料(MNG)基元;其次,通过分析无线供能系统漏磁情况以及基元负磁导率和磁损耗之间的关系,构成具有两种负磁导率的混合MNG阵列;最后,使用有限元分析软件计算人体各组织电场强度峰值与比吸收率峰值,验证了系统的安全性。实验结果表明,两线圈间距16~28 mm情况下,加入混合MNG阵列的无线供能系统输出功率从0.19~0.81 W增加到1.02~1.67 W,传输效率从8.53%~43.15%提升到40.78%~57.32%;接收线圈发生水平偏移情况下可以维持最低0.86 W的输出功率和32.81%的传输效率,30 min充电测试下系统最大温升为3.49℃,符合人体安全标准。As one of the optimal solutions to cardiac pacemaker energy supply, MCR-WPT is still in the research stage and has not qualified for clinical application. In response to the low transmission efficiency and poor deflection resistance of wireless energy supply systems for cardiac pacemakers, a wireless energy supply system based on hybrid mu-negative metamaterials was proposed. The coupling effect between coils is enhanced via the LC resonance generated by the metamaterial periodic structure, and the transmission performance of the MCR-WPT system can be improved without adding cumbersome control measures and a complex magnetic coupling mechanism.First, based on the resonance principle and quality factor theory of mu-negative metamaterials, two MNG units with different resonant frequencies were designed. Secondly, the relationship between the negative permeability and the magnetic loss of the units was analyzed along with the magnetic leakage status of the WPT system. Based on the analyses, the hybrid MNG slab with two negative permeabilities was constructed and applied to a wireless energy supply system for cardiac pacemakers. Thirdly, the peak electric field intensity and peak specific absorption rate of human body tissues were calculated with finite element analysis software to prove the safety characteristics of the system. Finally, an experimental platform of a wireless energy supply system for pacemakers was built to verify the polymagnetic properties of the hybrid MNG slab, and temperature rise experiments were added further to verify the safety and feasibility of the system.Experimental results show that the system output power is enhanced from 0.19~0.81 W to 1.02~1.67 W,and the transmission efficiency is improved from 8.53 %~43.15 % to 40.78 %~57.32 % under the case of 16~28 mm spacing between the transmitting and receiving coils. When the receiving coil is 20 mm away from the transmitting coil with horizontal offset in three directions, the output power of the MCR-WPT system incorporating the hybrid MNG sl

关 键 词：磁负超材料 无线供能系统 心脏起搏器 安全评估 

分 类 号：TH77[机械工程—仪器科学与技术] TM724[机械工程—精密仪器及机械]