传感技术学报2016，Vol.29Issue(1)：1-8,8.DOI:10.3969/j.issn.1004-1699.2016.01.001
高密度表面肌电信号无线数据采集同步机制研究
Research of Wireless Acquisition and Synchronization of High Density Surface Electromyogram
摘要
Abstract
High-spatial resolution,high-quality and high-precision surface Electromyogram(sEMG)is required for High Density surface EMG(HD-sEMG)research. It also raises higher demand of convenience,responsiveness,endur-ance and other aspects of the sEMG acquisition system. Based on consideration of wearability,real-time and high-throughput,a detailed study of system architecture and transport network in the sEMG acquisition system is revealed in this paper. A real-time collection and transmission system is constructed,which is built on modular layered frame, wired USB with wireless WIFI transmission,asynchronous acquisition with synchronous collection,and high-preci-sion synchronization mechanism based on double-buffers and slot switching. To test its function and performance,an evaluation system is developed which has128 sEMG channels with 1 kHz sampling rate and 16 bit data at each chan-nel. As the results show,when 50 ms is used as communication period,the inter-channel synchronization error is less than 320μs,the refresh rate is up to 20 Hz and the average delay at each channel is less than 80 ms.关键词
表面肌电信号/高密度表面肌电信号/多通道/时隙切换/时间同步/实时传输Key words
sEMG/HD-sEMG/multichannel/slot switching/time synchronization/real-time transmission分类
信息技术与安全科学引用本文复制引用
林上耀,金文光,张赛赛..高密度表面肌电信号无线数据采集同步机制研究[J].传感技术学报,2016,29(1):1-8,8.基金项目
国家863计划项目(2013AA013705) （2013AA013705）
