【作者】 常青；

【导师】 金文光； 唐少华；

【作者基本信息】 浙江大学 ， 工程硕士（专业学位）， 2021， 硕士

【摘要】 功能性电刺激是一种应用广泛的损伤康复技术,它是利用对人体运动障碍相应肌肉部位的电刺激来改善肌肉状况,以保持和恢复其运动功能;表面肌电信号是中枢神经系统的运动神经元细胞产生的生物电信号,经过神经肌肉的传导在人体表皮产生的综合生物电现象,在康复医疗、人机交互等领域都有广泛的应用价值。论文研究一种结合表面肌电的无线多通道功能性电刺激系统,目的是为肌肉康复训练、缓解肌肉疲劳、肌肉恢复状态分析等应用提供精确、安全、便携的医疗康复设备的解决方案。该系统包括设备端和接收端两个部分:设备端主要设计了200Hz～2k Hz采样率可调整的多通道表面肌电信号采集电路和程序,波形、频率、强度、脉宽等参数可调整的双极性恒流功能性电刺激电路和控制程序;接收端设计了图形界面控制软件,以及与设备端无线通信的低功耗蓝牙收发电路,可以实时接收表面肌电信号进行观察与分析,同时也能在多通道电极中选择任意某通道实施功能性电刺激,并对其状态和参数进行实时控制和调整。该系统电极连接方式简洁,设备操作灵活,隔离安全性高。经实验测试,该系统工作稳定,能够按照预设的参数输出电刺激电流波形,其强度的误差控制在3%以内,频率的误差控制在5%以内;能够实时有效采集肌肉运动信息,具有25d B左右的信噪比,实现了结合表面肌电信号反馈的功能性电刺激的系统功能,适用于神经损伤治疗、肌肉恢复训练和评估的应用场景。更多还原

【Abstract】 Functional electrical stimulation(FES)is a widely used injury rehabilitation technology.It uses electrical stimulation to the dyskinesia muscle parts of the human body to improve the muscle condition to maintain and restore its motor function.The surface electromyography(sEMG)is a comprehensive bioelectric phenomenon generated in the human epidermis by neuromuscular transduction of bioelectric signals produced by motor neurons of the central nervous system.It has a wide range of applications in the fields of rehabilitation medicine and human-computer interaction.This thesis studies a wireless multi-channel FES system combined with sEMG,aiming to provide precise,safe and portable medical rehabilitation equipment solutions for muscle rehabilitation training,muscle fatigue alleviating,muscle recovery state analysis and other applications.The system includes two parts: the device part and the receiver part.The device part including circuits and control programs is mainly designed for the sEMG acquisition with adjustable sampling rate in 200 Hz to 2k Hz,and the FES implement with bipolar constant current and adjustable parameters such as waveform,frequency,intensity and pulse width.The receiver part provides a graphical interface control software and a Bluetooth Low-Energy(BLE)transceiver circuit for wireless communication,it can receive sEMG signals in real time for observation and analysis,select any channel in the multi-channel electrode to implement FES and control the state and adjust parameters of the FES in real time.The electrode connecting method of this system is simple,the equipment operation is flexible,and the isolation safety is high.Experimental tests show that the system works stably,can output electrical stimulation waveforms according to the preset parameters,the error of the intensity is controlled within 3% and the error of the frequency is controlled within 5%.The system can collect real-time muscle motion information effectively,has a signal-to-noise ratio of about 25 d B and finally achieves the system function of FES combined with the feedback of sEMG signals.It is suitable for application scenario of nerve injury treatment,muscle recovery training and assessment.更多还原