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-Feb-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
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