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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.


Needle tip condition after the annealing process.
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f5-sensors-15-16265: Needle tip condition after the annealing process.

Mentions: The ideal shape for a sEMG electrode is a curved shape to compensate for the skin's curvature and to ensure comfortable skin contact. After the MNA was fabricated, the MNA was annealed on a curved substrate above its glass temperature. The curved substrate was prepared using commercial clay, the shape of which can be modified easily. Figure 5 describes the microscopic image of the needle tip after the annealing process. Although several needles showed bending, the effect of the tip bending can be negligible. After the annealing process, the silver/titanium layers were added using an e-beam evaporator, and wires were connected to conventional amplifiers. While the electrode was attached to the skin, a flexible band wrapped the electrode's location. The curved substrates with different curvatures are shown in Figure 6.


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)

Needle tip condition after the annealing process.
© Copyright Policy
Related In: Results  -  Collection

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

f5-sensors-15-16265: Needle tip condition after the annealing process.
Mentions: The ideal shape for a sEMG electrode is a curved shape to compensate for the skin's curvature and to ensure comfortable skin contact. After the MNA was fabricated, the MNA was annealed on a curved substrate above its glass temperature. The curved substrate was prepared using commercial clay, the shape of which can be modified easily. Figure 5 describes the microscopic image of the needle tip after the annealing process. Although several needles showed bending, the effect of the tip bending can be negligible. After the annealing process, the silver/titanium layers were added using an e-beam evaporator, and wires were connected to conventional amplifiers. While the electrode was attached to the skin, a flexible band wrapped the electrode's location. The curved substrates with different curvatures are shown in Figure 6.

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.