Design of a wireless multi-channel surface EMG signal acquisition system

The EMG signal acquisition techniques have attracted much attention, and have been widely applied. Most EMG acquisition systems use the wired transmission mode, so signals are easily contaminated by power line frequency interference. In addition, the sEMG is relatively weak. It is essential to make amplifying, filtering and denoising for sEMG pre-processing. In this paper, a four-channel wireless sEMG acquisition system with high accuracy, low latency, portable, lithium battery and wireless data transmission is designed. And it integrates lithium battery charging and discharging system, acquisition of weak signal as well as pre-processing of filter circuit. Besides, this system's interference of noise is small. And high single channel SNR can avoid power frequency interference. It can provide EMG signal processing with convenient platform, which creates the hardware condition for the research of the follow up surface EMG signal processing.