A Modular, Smart, and Wearable System for High Density sEMG Detection
A Modular, Smart, and Wearable System for High Density sEMG Detection
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DOI：
10.1109/tbme.2019.2904398
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发表时间：
2019-12-01
影响因子：
4.6
通讯作者：
Gazzoni, Marco
中科院分区：
文献类型：
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作者：
Cerone, Giacinto Luigi;Botter, Alberto;Gazzoni, Marco
目的：使用线性或二维电极阵列进行表面EMG检测（HD-sEMG）正受到关注，因为它增加了从表面EMG提取的信息的量和可靠性。然而，设置的复杂性和HD-sEMG硬件的复杂性目前限制了其在动态条件下的使用。本文的目的是开发一种小型化，无线和模块化的HD-sEMG采集系统的应用程序，需要高便携性和鲁棒性的运动伪影。方法：采用模块化结构设计系统。其核心是一个小型化的32通道放大器（传感器单元- SU），以2048 sps/ch的速度采样，分辨率为16位，并将数据无线传输到PC或移动终端。每个SU是身体传感器网络的一个节点，用于从不同肌肉同步采集信号。结果：一个原型与两个SU的开发和测试。每个SU都很小（3.4 cm x 3 cm x 1.5 cm），重量轻（16.7 g），可以直接连接到电极;因此，无需常规的有线设置。它允许检测HD-sEMG信号，平均噪声为1.8 μ V-RMS，在抑制电力线干扰和运动伪影方面具有高性能。在两个SU上进行的测试表明，在22米范围内没有数据丢失，最大同步延迟为+/- 500 μ s。结论：在广泛的实验条件下收集的数据证实了所设计架构的功能和所获取信号的质量。重要性：通过简化实验设置，减少硬件负担，并提高信号质量在动态收缩，开发的系统开辟了新的前景，在应用和临床环境中使用HD-sEMG。
Objective: The use of linear or bi-dimensional electrode arrays for surface EMG detection (HD-sEMG) is gaining attention as it increases the amount and reliability of information extracted from the surface EMG. However, the complexity of the setup and the encumbrance of HD-sEMG hardware currently limits its use in dynamic conditions. The aim of this paper was to develop a miniaturized, wireless, and modular HD-sEMG acquisition system for applications requiring high portability and robustness to movement artifacts. Methods: A system with modular architecture was designed. Its core is a miniaturized 32-channel amplifier (Sensor Unit - SU) sampling at 2048 sps/ch with 16 bit resolution and wirelessly transmitting data to a PC or a mobile device. Each SU is a node of a Body Sensor Network for the synchronous signal acquisition from different muscles. Results: A prototype with two SUs was developed and tested. Each SU is small (3.4 cm x 3 cm x 1.5 cm), light (16.7 g), and can be connected directly to the electrodes; thus, avoiding the need for customary, wired setup. It allows to detect HD-sEMG signals with an average noise of 1.8 mu V-RMS and high performance in terms of rejection of power-line interference and motion artefacts. Tests performed on two SUs showed no data loss in a 22 m range and a +/- 500 mu s maximum synchronization delay. Conclusions: Data collected in a wide spectrum of experimental conditions confirmed the functionality of the designed architecture and the quality of the acquired signals. Significance: By simplifying the experimental setup, reducing the hardware encumbrance, and improving signal quality during dynamic contractions, the developed system opens new perspectives in the use of HD-sEMG in applied and clinical settings.