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Curved Microneedle Array-Based sEMG Electrode for Robust Long-Term Measurements and High Selectivity.

Kim M, Kim T, Kim DS, Chung WK - Sensors (Basel) (2015)

Bottom Line: However, conventional electrodes are not appropriate for long-term measurements and are easily influenced by the environment, so the range of applications of sEMG is limited.The results show that the proposed electrode is robust to perspiration and can maintain a high-quality measuring ability for over 8 h.The proposed electrode also has high selectivity for motion compared with a commercial wet electrode and dry electrode.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea. minjaekim@postech.ac.kr.

ABSTRACT
Surface electromyography is widely used in many fields to infer human intention. However, conventional electrodes are not appropriate for long-term measurements and are easily influenced by the environment, so the range of applications of sEMG is limited. In this paper, we propose a flexible band-integrated, curved microneedle array electrode for robust long-term measurements, high selectivity, and easy applicability. Signal quality, in terms of long-term usability and sensitivity to perspiration, was investigated. Its motion-discriminating performance was also evaluated. The results show that the proposed electrode is robust to perspiration and can maintain a high-quality measuring ability for over 8 h. The proposed electrode also has high selectivity for motion compared with a commercial wet electrode and dry electrode.

No MeSH data available.


Temporal changes of the LDA classification accuracy.
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f17-sensors-15-16265: Temporal changes of the LDA classification accuracy.

Mentions: The classification accuracy distribution is described in Figure 17. At the beginning of the attachment (0 h), the accuracy of the proposed electrode was slightly higher than that of the standard wet electrode. However, as time passed, the classification accuracy using the standard wet electrode decreased continuously, because the electrolyte was contaminated and dried out. With the proposed electrode, the signal quality depended only on the contact conditions, so the classification accuracy remained high. Although the dry electrode maintained high accuracies during the attachment, it showed a large variance, because the flat surface did not guarantee stable skin contact during the measurement.


Curved Microneedle Array-Based sEMG Electrode for Robust Long-Term Measurements and High Selectivity.

Kim M, Kim T, Kim DS, Chung WK - Sensors (Basel) (2015)

Temporal changes of the LDA classification accuracy.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4541878&req=5

f17-sensors-15-16265: Temporal changes of the LDA classification accuracy.
Mentions: The classification accuracy distribution is described in Figure 17. At the beginning of the attachment (0 h), the accuracy of the proposed electrode was slightly higher than that of the standard wet electrode. However, as time passed, the classification accuracy using the standard wet electrode decreased continuously, because the electrolyte was contaminated and dried out. With the proposed electrode, the signal quality depended only on the contact conditions, so the classification accuracy remained high. Although the dry electrode maintained high accuracies during the attachment, it showed a large variance, because the flat surface did not guarantee stable skin contact during the measurement.

Bottom Line: However, conventional electrodes are not appropriate for long-term measurements and are easily influenced by the environment, so the range of applications of sEMG is limited.The results show that the proposed electrode is robust to perspiration and can maintain a high-quality measuring ability for over 8 h.The proposed electrode also has high selectivity for motion compared with a commercial wet electrode and dry electrode.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea. minjaekim@postech.ac.kr.

ABSTRACT
Surface electromyography is widely used in many fields to infer human intention. However, conventional electrodes are not appropriate for long-term measurements and are easily influenced by the environment, so the range of applications of sEMG is limited. In this paper, we propose a flexible band-integrated, curved microneedle array electrode for robust long-term measurements, high selectivity, and easy applicability. Signal quality, in terms of long-term usability and sensitivity to perspiration, was investigated. Its motion-discriminating performance was also evaluated. The results show that the proposed electrode is robust to perspiration and can maintain a high-quality measuring ability for over 8 h. The proposed electrode also has high selectivity for motion compared with a commercial wet electrode and dry electrode.

No MeSH data available.