无线供电形状记忆合金驱动的尿道阀驱动特性研究

Research on Driving Performances of Urethra Valve Driven by SMA Based on Wireless Power Supply

为了解决尿道括约肌损伤或神经功能障碍引起的重度尿失禁问题,设计了一种磁耦合谐振式无线供电形状记忆合金弹簧驱动的尿道阀。建立了尿道阀的驱动力模型和无线电能传输耦合模型,仿真分析了弹簧结构参数对驱动力的影响规律,通过实验研究了无线供电系统的控制参数和线圈结构参数对尿道阀驱动特性的影响规律以及尿道阀的启闭特性。研究结果表明,该尿道阀原理可行;增大弹簧线径,减小弹簧中径和匝数,增大信号源电压,增大线圈直径、线径和匝数以及合理设定信号源频率,均可提高驱动特性;尿道阀启闭特性良好。研究结果可为尿道阀结构设计提供依据,也可为人体其他括约肌自主控制的设计提供参考。

In order to solve the problems of severe urinary incontinence caused by urethral sphincter injuries or dysfunctions,a urethral valve driven by SMA spring was designed based on magnetic coupled resonant wireless power supply.The driving force model of the valve spool and the coupling model of wireless power transfer were established.The influences of the spring structure parameters on the driving forces were simulated and analyzed.The effects of the control parameters and the structure parameters of the wireless power supply system on the driving performances of the urethral valve,and the opening and closing performances of the urethra valve were studied experimentally.The results show that the principles of urethral valve are feasible,increasing the spring wire diameter,reducing the spring pitch diameter and the number of spring turns,increasing the signal source voltages,the coil wire diameters,the coil diameters and the numbers of coil turns and setting the reasonable frequency of the signal sources may improve the driving performances,and the opening and closing performances of the urethra valve are good.The research may provide the basis for the structural design of the urethral valve,and also provide the reference for the design of autonomous control system for other human sphincters.