標題: | A Wearable Channel Selection-Based Brain-Computer Interface for Motor Imagery Detection |
作者: | Lo, Chi-Chun Chien, Tsung-Yi Chen, Yu-Chun Tsai, Shang-Ho Fang, Wai-Chi Lin, Bor-Shyh 影像與生醫光電研究所 電子工程學系及電子研究所 電控工程研究所 Institute of Imaging and Biomedical Photonics Department of Electronics Engineering and Institute of Electronics Institute of Electrical and Control Engineering |
關鍵字: | brain-computer interface;motor imagery;spatial filter;channel selection |
公開日期: | 1-二月-2016 |
摘要: | Motor imagery-based brain-computer interface (BCI) is a communication interface between an external machine and the brain. Many kinds of spatial filters are used in BCIs to enhance the electroencephalography (EEG) features related to motor imagery. The approach of channel selection, developed to reserve meaningful EEG channels, is also an important technique for the development of BCIs. However, current BCI systems require a conventional EEG machine and EEG electrodes with conductive gel to acquire multi-channel EEG signals and then transmit these EEG signals to the back-end computer to perform the approach of channel selection. This reduces the convenience of use in daily life and increases the limitations of BCI applications. In order to improve the above issues, a novel wearable channel selection-based brain-computer interface is proposed. Here, retractable comb-shaped active dry electrodes are designed to measure the EEG signals on a hairy site, without conductive gel. By the design of analog CAR spatial filters and the firmware of EEG acquisition module, the function of spatial filters could be performed without any calculation, and channel selection could be performed in the front-end device to improve the practicability of detecting motor imagery in the wearable EEG device directly or in commercial mobile phones or tablets, which may have relatively low system specifications. Finally, the performance of the proposed BCI is investigated, and the experimental results show that the proposed system is a good wearable BCI system prototype. |
URI: | http://dx.doi.org/10.3390/s16020213 http://hdl.handle.net/11536/133546 |
ISSN: | 1424-8220 |
DOI: | 10.3390/s16020213 |
期刊: | SENSORS |
Volume: | 16 |
Issue: | 2 |
起始頁: | 0 |
結束頁: | 0 |
顯示於類別: | 期刊論文 |