Mobile robots and their control system

System according to any of the preceding claims wherein the algorithm of the microcomputer initiates the return towards the fixed station of recharge after a minimum working time, independently of the state of charge of a battery, and when the mobile robot detects an infra-red radiation of an intensity higher than a certain threshold, the aforementioned threshold decreasing with the increase in the duration of the working time and/or when the state of charge of the battery is below a predetermined level.

System according to the preceding claims characterized in that during the step of return of the robot towards the fixed station, and according to the state of charge of the battery and/or the intensity of the detected infra-red radiation, the brush roller and/or the suction turbine are inactivated.

System according to any of the preceding claims wherein the transmitter of the more directional infra-red beam (2) is less powerful than the transmitter (3) of the less directional infra-red beam.

Robot for cleaning according to the preceding claim characterized in that it is a robotic vacuum-cleaner.

Robot according to the preceding claim characterized in that the microcomputer (44) takes at least in account, for determining the suction power, the measurement of number of revolutions of the aforementioned brush roller (24).

Robot according to the preceding claim incorporating a guiding technique for the cleaning of the ground characterized in that the path followed by the robot (7) depends on the quantity of particles present on the surface to clean, the said quantity being estimated by a particle analyzer (27,28) located near the suction inlet of the robotic vacuum cleaner, the aforementioned analyzer sending the signals to the microcomputer (44) carried by the mobile robot and controlling the displacement of the robot according to the said signals.

Robot according to the preceding claim wherein the microcomputer can control a deceleration and/or a linear back and forth movement and/or a back and forth movement in a fan shape of the mobile robot.

Robot according to any of the preceding claims characterized in that it comprises a linear sensor of collision surrounding entirely or partly the base of the careenage, the sensor including a linear metal (62) conductor and, in parallel, a linear element (61) made of conducting plastic, for example conducting rubber, whose ends are subjected to a potential difference, the linear element in plastic being able to come elastically into contact with the conducting linear element under the effect of a temporary pressure resulting from the impact of the robot with an obstacle (65), the measurement of the current measured at the level of the conducting element being a signal fed to the microcomputer to locate the point of impact at the basis of the careenage.