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Design of Wearable Headset with Steady State Visually Evoked Potential-Based Brain Computer Interface
Bor-Shyh Lin1, Bor-Shing Lin2, Tzu-Hsiang Yen3
1Institute of Imaging and Biomedical Photonics, National Chiao Tung University, Hsinchu City 30010, Taiwan. t.bslin@yahoo.com.tw.
Micromachines
|October 30, 2019
Summary
This study introduces a wearable brain-computer interface (BCI) using dry electrodes and steady-state visually evoked potentials (SSVEP). The novel system offers a convenient and gel-free solution for real-time EEG signal translation.
Area of Science:
- Neuroscience
- Biomedical Engineering
- Computer Science
Background:
- Conventional brain-computer interface (BCI) systems often rely on bulky equipment and conductive gels for electroencephalography (EEG) signal acquisition.
- These limitations hinder the practical, daily application of BCI technology due to user discomfort and inconvenience.
Purpose of the Study:
- To develop a wearable, gel-free BCI system for improved user experience and portability.
- To integrate EEG signal acquisition and command translation into a single, front-end headset module.
Main Methods:
- Designed and implemented a wearable headset featuring active dry electrodes for gel-free EEG signal acquisition from hairy scalp sites.
- Integrated a steady-state visually evoked potential (SSVEP)-based BCI algorithm onto a field-programmable gate array (FPGA) module for real-time signal processing.
- Utilized a commercial tablet as a visual stimulus device for control icon presentation.
Main Results:
- The developed wearable BCI system successfully acquired EEG signals and translated them into control commands in real time.
- The system demonstrated excellent performance with an information transfer rate of 36.08 bits/min.
- The use of dry electrodes eliminated the need for conductive gels, enhancing user comfort and convenience.
Conclusions:
- The proposed wearable SSVEP-based BCI system overcomes the limitations of conventional BCI devices.
- This innovation significantly improves the convenience and portability of BCI technology for daily applications.
- The system's high performance indicates its potential for practical use in assistive communication and control.
