Development of SSVEP-based intelligent wheelchair brain computer interface assisted by reactive obstacle avoidance
Journal
Proceedings of the IEEE International Conference on Industrial Technology
Journal Volume
2016-May
Pages
1572-1577
Date Issued
2016
Author(s)
Abstract
This paper proposed a SSVEP-based brain-computer interface (BCI) for wheelchair controls. SSVEP is an evoked signal which responds to visual flickering stimuli at a specific frequency. A stimulus panel containing 12, 15, 18 and 28-Hz flickering stimuli was presented in front of users. Each flickering stimulus was used to evoke SSVEP and responded to a particular command for the wheelchair control. The power spectrum densities (PSDs) for the specific frequency bands were analyzed. A target stimuli was triggered when the PSD exceeded a defined threshold. Users were able to drive the wheelchair with forward, stop, left-turn and right-turn commands according to their intentions. Additionally, a reactive navigation scheme based on artificial potential field (APF) approach was implemented to improve the security of the proposed system. A laser scanner was outfitted for obstacle detections. The proposed wheelchair system is expected to provide a convenient, safe and comfortable mobile assistance to users suffering spinal cord injuries (SCIs). ? 2016 IEEE.
Subjects
Air navigation
Flickering
Frequency bands
Interfaces (computer)
Obstacle detectors
Wheelchairs
Artificial potential fields
Intelligent wheelchair
Power spectrum density
Reactive navigation
Reactive obstacle avoidance
Specific frequencies
Spinal cord injuries (SCI)
SSVEP
Brain computer interface
Type
conference paper