A new method of localizing gas source positions for a mobile robot with gas sensors

A remotely locate a gas source using a mobile robot with new type gas sensors is proposed. We proposed a new method of discrimination and quantification of gases by a single semiconductor gas sensor, based on the information embedded in a nonlinear dynamic response. We applied the method of gas sensor to a mobile robot, which locate a gas source; it is possible to reply in the time order of several seconds. We also discuss challenge problems of the "chemotaxis" robot.