Coverage robot mobility
First Claim
1. An autonomous coverage robot comprising:
- a chassis;
a drive system mounted on the chassis and configured to maneuver the robot;
an edge cleaning head carried by the chassis and driven by an edge cleaning head motor to rotate about a non-horizontal axis, the edge cleaning head extending beyond a lateral extent of the chassis to engage a floor surface while the robot is maneuvered across the floor;
a controller carried by the chassis;
a motor current sensor in communication with the controller and configured to monitor motor current associated with the edge cleaning head;
wherein the controller is configured to reverse bias the motor current to the edge cleaning head motor, in response to an elevated motor current, sufficient to provide substantially free reverse rotation of the edge cleaning head motor, while continuing to maneuver the robot across the floor.
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Accused Products
Abstract
An autonomous coverage robot includes a chassis, a drive system to maneuver the robot, an edge cleaning head carried, and a controller. The controller is configured to monitor motor current associated with the edge cleaning head and to reverse bias the edge cleaning head motor in response to an elevated motor current, while continuing to maneuver the robot across the floor. In another aspect, an autonomous coverage robot includes a drive system, a bump sensor, and a proximity sensor. The drive system is configured to reduce a speed setting in response to a signal from the proximity sensor indicating detection of a potential obstacle in a forward direction, while continuing to advance the robot according to a heading setting. Furthermore, the drive system is configured to alter the heading setting in response to a signal received from the bump sensor indicating contact with an obstacle.
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Citations
32 Claims
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1. An autonomous coverage robot comprising:
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a chassis; a drive system mounted on the chassis and configured to maneuver the robot; an edge cleaning head carried by the chassis and driven by an edge cleaning head motor to rotate about a non-horizontal axis, the edge cleaning head extending beyond a lateral extent of the chassis to engage a floor surface while the robot is maneuvered across the floor; a controller carried by the chassis; a motor current sensor in communication with the controller and configured to monitor motor current associated with the edge cleaning head; wherein the controller is configured to reverse bias the motor current to the edge cleaning head motor, in response to an elevated motor current, sufficient to provide substantially free reverse rotation of the edge cleaning head motor, while continuing to maneuver the robot across the floor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of disentangling an autonomous coverage robotic, the method comprising:
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running the robot to autonomously traverse across a floor surface in a forward direction of the robot while rotating about a non-horizontal axis an edge cleaning head carried by the chassis and driven by an edge cleaning head motor, the edge cleaning head extending beyond a lateral extent of the chassis while engaging the floor surface; monitoring motor current associated with the edge cleaning head; reverse biasing the motor current to the edge cleaning head motor, in response to detecting an elevated edge cleaning head motor current, sufficient to provide substantially free reverse rotation of the edge cleaning head motor, while continuing to maneuver across the floor surface. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An autonomous robot comprising:
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a chassis; a drive system mounted on the chassis and configured to maneuver the robot; a floor proximity sensor carried by the chassis and configured to detect an adjacent floor surface, the sensor comprising; a beam emitter configured to direct a beam toward the floor surface; and a beam receiver responsive to a reflection of the directed beam from the floor surface and mounted in a downwardly-directed receptacle of the chassis; and a beam-transparent cover having a forward and rearward edge disposed across a lower end of the receptacle to prohibit accumulation of sediment in the receptacle, the forward edge elevated above the rearward edge; wherein the cover comprises an anti-static material. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
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Specification