At the Chiba Institute of Technology, a group led by Shuro Nakajima has developed a robot wheelchair that can climb over steps.
This robot can make a variety of movements, using its four-wheel drive and five axes. Normally, it rolls along on its wheels, but if there’s a step or ditch, it can get over the obstacle by using its wheels as legs. All the user needs to do is tell it which direction to go, using a joystick. The robot automatically assesses the surrounding terrain and moves appropriately.