Title :
Real-time control of an SSVEP-actuated remote-controlled car
Author :
Chang, Hsiang-Chih ; Deng, Hua-Ting ; Lee, Po-Lei ; Wu, Chi-Hsun ; Shyu, Kuo-Kai
Author_Institution :
Dept. of Electr. Eng., Nat. Central Univ. Taiwan, Jhongli, Taiwan
Abstract :
In this study, an steady-state visual evoked potential (SSVEP) - based brain computer interface (BCI) has been developed to wirelessly handle a remote-controlled car. Three flickers, flickering at distinct frequencies (13 Hz, 14 Hz, and 15 Hz), were displayed on a liquid crystal display (LCD) monitor to induce user´s SSVEPs, which were used control three movement functions (forward, leftward, rightward) of the remote-control car. Users gazed at one chosen flicker at one time to generate particular SSVEP, and the SSVEP was then recognized to activate a desired movement function of the remote-control car. With the provision of front scenes, captured from a CCD camera mounted on the remote-control car, subjects were able to generate desired SSVEPs to guide the remote-control car to a designated place. In this study, all participants were requested to guide the remote-control car to pass an S-shaped path. The EEG measurements utilized only one bipolar channel placed at Oz position (Oz(+)), with reference electrode at the right mastoid (Oz(-)). The acquired EEG signals were segmented into one-second epochs. Gazed-targets were then detected by a matched filter detector (MFD), which comprises a MF demodulator and an amplitude detector. The proposed system has been tested in two volunteers, and the mean accuracy and mean information transfer rate (ITR) were 92.69% and 49.79 bits/min, respectively.
Keywords :
CCD image sensors; brain-computer interfaces; electroencephalography; liquid crystal displays; matched filters; object detection; real-time systems; telecontrol; visual evoked potentials; CCD camera; EEG signals; MF demodulator; Oz position; S shaped path; SSVEP; amplitude detector; bipolar channel; brain computer interface; charge coupled device; electroencephalography; frequency 13 Hz to 15 Hz; liquid crystal display; matched filter detector; mean information transfer rate; real time control; remote controlled car; steady state visual evoked potential; Band pass filters; Brain computer interfaces; Demodulation; Detectors; Electroencephalography; Matched filters; Visualization; Brain computer interface (BCI); Matched filter detector (MFD); Steady-state visual evoked potential (SSVEP);
Conference_Titel :
SICE Annual Conference 2010, Proceedings of
Conference_Location :
Taipei
Print_ISBN :
978-1-4244-7642-8