北京生物医学工程

人工肛门括约肌系统的无线能量传输优化

Optimization of wireless energy transfer in artificial anal sphincter

单位：1 上海交通大学电子信息与电气工程学院（上海 200240）2 上海智慧戒毒与康复工程技术研究中心（上海 200240）

分类号：

出版年·卷·期（页码）：2025·44·1（49-54）

摘要：

目的人工肛门括约肌系统（artificial anal sphincter，AAS）采用经皮无线能量传输方式对体内储能端的电池进行反复充电，可以保证系统长期在体工作。系统在经皮无线充电过程中产生的热量会对生物体组织的安全性产生不利影响，本文设计新型无线能量传输系统以增强其温控安全性。方法AAS接收端发热主要是由稳压模块压差过大导致，稳压器压差大的原因是充电过程中负载变大引起稳压器输入电压增大。因此，本文基于磁耦合谐振原理设计LCC-S型无线能量传输系统，通过调节其发射端电压可以线性调节接收端稳压器输入电压，且其接收端电压不会随负载变化而变化，避免了充电过程中稳压器压差变大导致的大量发热。最后通过搭建实验电路评估新系统在充电时接收端电压的表现，并与现有的S-S型系统进行充电发热对比。结果在发射功率4.5 W、传输距离为10 mm时，系统总传输效率为50.51%。连续充电30 min接收端壳体最高温度仅为39.4 ℃。新型无线能量传输系统在充电过程中接收端稳压器电压不变，总发热量比S-S型系统小。结论新型 LCC-S 无线能量传输系统减少了充电过程中的发热，满足人工肛门括约肌充电过程的温控安全性要求。

Objective The artificial anal sphincter （AAS）uses percutaneous wireless energy transmission to repeatedly recharge the battery at the energy storage end of the body, which ensures that the system will work in the body for a long time. The heat generated by the process of percutaneous wireless charging of the artificial anal sphincter system can adversely affect the biosafety of the organism's tissues, this paper designing a new wireless energy transmission system to enhance temperature control security. Methods The receiver side of the AAS is the excessive voltage difference of the regulator module, and the reason for the excessive voltage difference of the regulator is the increase in the input voltage of the regulator due to the increase in the load during the charging process. Therefore LCC-S wireless energy transfer system is designed according to the magnetic coupling resonance principle, which can linearly adjust the input voltage of the voltage regulator at the receiving end by adjusting the voltage at the transmitting end, and the voltage at the receiving end of the system does not change according to the load, which avoids a large amount of heat generation due to the large difference in voltage of voltage of the voltage regulator in the charging process. Finally, we build an experimental circuit to evaluate the performance of the new system in terms of voltage at the receiving end during charging and compare the charging heat generation with the existing S-S type system. Results The total transmission efficiency of the system is 50.51% when the transmission distance is 10 mm with a transmit power of 4.5 W. The maximum temperature of the case at the receiving end is only 39.4°C for 30 min of continuous charging. The new wireless energy transfer system has a constant voltage of at the receiving side during the charging process and the total heat generation is smaller than the S-S type system.Conclusions The new LCC-S wireless energy transfer system reduces the heating of the charging process and meets the temperature-controlled safety of the artificial anal sphincter charging process.

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