一种表面肌电信号的无线采集方式

Wireless way to collect surface electromyography signal

表面肌电信号包含了大量表征肌肉生物特征的信息,它是一种微弱的生物电信号且极易受多种噪声干扰。可利用银电极的特性设计一种检测表面肌电信号的电极,电极贴于人体皮肤表面对检测到的信号进行放大、滤波,基于STM32对检测到的信号进行数模转换并通过蓝牙4.0发送至其他控制设备,实现表面肌电信号的无创采集和无线传输。实验表明,该采集方式可检测到明显的表面肌电信号变化,并成功实现蓝牙之间数据的发送和接收。

Surface electromyography signal contains lots of biometric information which can reflect the characteristics of muscle, but it is a kind of weak bioelectric signal and is highly susceptible to a variety of noise interference. However, the property of silver electrode can be used to design a sensor for detecting sEMG. The sensor is affixed to the skin surface to detect the signal and amplify and filter it. Based on STM32F103 ,the signal is converted to digital signal and sent to other control devices via Bluetooth 4.0. Finally, sEMG can be measured noninvasively and transported wirelessly. Experiments show that the sensor can detect signifi- cant changes in sEMG and the signal can be successfully transmitted and received between Bluetooth.