AUTONOMOUS DEVICE

摘要

An autonomous device (10) is adapted to automatically move on a work surface (11) removing dirt, such as gravel, sand, dust particles and the like, from said work surface. The device (10) comprises a chassis (12) provided with wheels and with a brush roller (20) rotated by a drive motor (22) during said movement for the purpose of brushing up the dirt towards a suction duct (23) wherefrom, by means of a suction air stream, the dirt is conveyed to a dust container (24). An electronic control device (25) is provided for the control of the drive motor (22) of the brush roller. If the movement of the brush roller (20) is blocked or obstructed to a predetermined extent the control device (25) is arranged to stop the brush roller motor (22) and then transitorily activate the motor (22) in the opposite direction and, finally, after another stop, to reconnect the brush roller motor (22) to operate in the original direction of rotation.