在对人体表面肌电信号研究的基础上,设计出一种肌电假手系统,其中包括肌电信号采集调理系统和假手控制系统.肌电信号经信号调理电路放大、滤波、陷波后,由低功耗的MSP430F149单片机进行A/D转换、特征计算.单片机结合肌电信号与触滑觉传感器反馈的信息来控制电机转向与转速,从而控制假手做出相应动作.通过实际采集的肌电信号在示波器上显示的波形与假手的动作进行对比,说明系统设计是合理有效的.%On the basis of research on surface electromyography ( sEMG) signal, a myoelectrical controlled prosthetic hand system is designed. It includes electromyography (EMG) signal acquiring and conditioning system and the prosthetic hand control system. Through the signal acquiring and conditioning circuit, the EMG signal is amplified,filtered and notched, A/D is converted and feature calculated by MSP430F149 microcontroller whose power consumption is low. The single-chip microcontroller combines the EMG signal with the feedback signal of the tactile and slip sensor,to control the velocity and the direction of the motor,so as to let the prosthetic hand to do corresponding action. The signal displayed on oscilloscope is compared with the action of prosthetic hand. The result shows that the design is reasonable and effective.
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