Engineering Seminar Series 11_2010: Robot Control Systems Using Bio-potential Signals

Prof. Minoru Sasaki, Department of Human and Information Systems Engineering Faculty of Engineering Gifu University

Date: 2010-07-30
Time: 11:00 to 12:00
Venue: Classroom 9-3-03


Robot control systems via human bio-potentials, such as  electroencephalographic (EEG), electrooculographic (EOG), and electromagnetic (EMG) signals are developed. Research and development of the  technology necessary for estimating and identifying the biological signals themselves through sensing and signal processing, as well as their conversion into control signals is carried out. Experiments to determine the viability of the technology were performed. From sensors attached to an operator's forehead, we attempt to discern his intentions and activity. By mapping signals to commands such as go forward, go backward, stop, turn right and turn left, the operator can control a device through his eye movements, facial muscles and brain waves. These signals can be separated into three frequency bands: a low frequency range of 1-3Hz, a high frequency range of 25-50Hz and the midrange beta wave range from 14-25Hz. CyberlinkTM and ESA-16TM, commercial devices, can acquire and process these signals. A computer analyzes the operator's EEG and EOG in real time. A neural networks further analyzes the EOG to ascertain the operator's intention. After training, the neural network was able to discern whether left or right was desired. Experimental results suggest that with a neural network in the loop, and efficacious assignment of commands, a small device can be controlled using human bio-potentials with few errors.

About the Speaker

Dr. Minoru Sasaki is a professor of human and information systems engineering, Gifu University, Japan. Dr Sasaki has been received his B.Sc. degree in Yamagata University in 1980, his M.Sc. and Ph.D. in Tohoku University, Japan, in 1982, and 1985, respectively. All his degrees are in mechanical engineering. He has an extensive experience in teaching and research: He was a visiting professor at University of California from April 1990 to July 1991 and from October 1997 to December 1997. He was also a visiting professor in George Institute of Technology, The George W. Woodruff School, USA, from January 1998 to March 1998. He is the head of supporting and development centre for technology education in Gifu University.  Prof. Sasaki has published close to 200 papers in refereed journals and conference proceedings. He is a member of ASME, IEEE, JSME (Japan Society of Mechanical Engineers), JSASS (Japan Society of Aeronautical and Space Science), JSAEM(Japan Society of Applied Electromagnetics and Mechanics), SICE (Society of Instrument and Control Engineering). He is an executive board member of JSAEM since 2008, executive director of SICE since 2008, General chair of The 2003 International Conference on Mechatronics and Information Technology.

He is a well known professor in the area of bio-potential signal processing within Brain-Machine Interface. Prof. Sasaki received several awards for his research contributions in robotics control. His most recent invention is the development of a system whereby a person can control a mobile robot using the components of his/her brain wave bio-potentials.