‘Walopi’ (Warning Loco Pilots) and ‘Chemvist’ (Check My Vigilance State) are two technological solutions developed by researchers from Indian Institute of Technology Kharagpur to help solve a problem of Indian Railways – sleepy drivers.
‘Chemvist’ uses Electrooculography (EOG) signals, which essentially give the voltage difference between the cornea and retina of the eye. Walopi’, on the other hand, checks the on-board level of alertness. It uses a camera with face-detection technology, which assesses if the driver is falling asleep.
