Department of Electrical and Electronic Engineering, Hanyang University, Ansan 15588, Korea.
Sensors (Basel). 2020 Feb 21;20(4):1196. doi: 10.3390/s20041196.
Myoelectric prostheses assist users to live their daily lives. However, the majority of users are primarily confined to forearm amputees because the surface electromyography (sEMG) that understands the motion intents should be acquired from a residual limb for control of the myoelectric prosthesis. This study proposes a novel fabric vest socket that includes embroidered electrodes suitable for a high-level upper amputee, especially for shoulder disarticulation. The fabric vest socket consists of rigid support and a fabric vest with embroidered electrodes. Several experiments were conducted to verify the practicality of the developed vest socket with embroidered electrodes. The sEMG signals were measured using commercial Ag/AgCl electrodes for a comparison to verify the performance of the embroidered electrodes in terms of signal amplitudes, the skin-electrode impedance, and signal-to-noise ratio (SNR). These results showed that the embroidered electrodes were as effective as the commercial electrodes. Then, posture classification was carried out by able-bodied subjects for the usability of the developed vest socket. The average classification accuracy for each subject reached 97.92%, and for all the subjects it was 93.2%. In other words, the fabric vest socket with the embroidered electrodes could measure sEMG signals with high accuracy. Therefore, it is expected that it can be readily worn by high-level amputees to control their myoelectric prostheses, as well as it is cost effective for fabrication as compared with the traditional socket.
肌电假肢帮助用户过正常生活。然而，大多数用户主要局限于前臂截肢者，因为理解运动意图的表面肌电图（sEMG）应该从残肢获取，以控制肌电假肢。本研究提出了一种新的织物背心套，包括适合高水平上肢截肢者的刺绣电极，特别是肩离断截肢者。织物背心套由刚性支撑和带有刺绣电极的织物背心组成。进行了几项实验来验证带有刺绣电极的开发背心套的实用性。使用商用 Ag/AgCl 电极测量 sEMG 信号，以比较验证刺绣电极在信号幅度、皮肤-电极阻抗和信噪比（SNR）方面的性能。结果表明，刺绣电极与商用电极一样有效。然后，健全受试者进行姿势分类，以验证开发背心套的可用性。每位受试者的平均分类准确率达到 97.92%，所有受试者的准确率达到 93.2%。换句话说，带有刺绣电极的织物背心套可以高精度地测量 sEMG 信号。因此，预计它可以由高水平的截肢者轻松佩戴，以控制他们的肌电假肢，并且与传统的假肢相比，其制作成本效益更高。
