Cleaning robot and control method thereof

• US 7,324,870 B2
• Filed: 06/29/2004
• Issued: 01/29/2008
• Est. Priority Date: 01/06/2004
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Dong Seok
• Primary Examiner(s): Black; Thomas
• Assistant Examiner(s): Marc; McDieunel
• Application Number:
  US10/878,055
• Publication Number:
  US 20050149228A1
• Time in Patent Office: 1,309 Days
• Field of Search: 700/245, 700/246, 700/247, 700/248, 700/249, 700/250, 700/251, 700/252, 700/253, 700/254, 700/255, 700/256, 700/257, 700/258, 700/259, 700/264
• US Class Current: 700/245
• CPC Class Codes: A47L 2201/04 Automatic control of the travelling movement; Automatic obstacle detection
• CPC Class Codes: G05D 1/0242 using non-visible light signals, e.g. IR or UV signals
• CPC Class Codes: G05D 1/0272 comprising means for registering the travel distance, e.g. revolutions of wheels measuring distance traversed on the ground by vehicles, e.g. using odometers G01C22/00

Abstract

A cleaning robot and a control method thereof in which a cleaning path desired by the user is recognizable by the cleaning robot, thereby being capable of cleaning a cleaning area desired by the user in a pattern desired by the user. The cleaning robot includes a running unit to run the cleaning robot, a storage unit for storing a running path, along which the cleaning robot has learned, and a control unit to recognize the learned running path of the cleaning robot when a path learning operation is required, to store the recognized learned running path in the storage unit, and to drive the running unit. When a cleaning operation of the cleaning robot along the stored learned running path is required, the control unit controls the running unit to cause the cleaning robot to perform the required cleaning operation while running along the stored learned running path. The user can directly input, to the cleaning robot, a cleaning path desired by the user, in order to cause the cleaning robot to perform a cleaning operation while running along the learned running path. Accordingly, it is possible to accurately inform the cleaning robot of various areas associated with the cleaning operation, for example, an area to be repeatedly cleaned at several times, or an area to be prevented from being cleaned.

Claims

1. A cleaning robot for performing a cleaning operation while running along a cleaning path, comprising:

a running unit to run the cleaning robot;

a storage unit to store a running path, along which the cleaning robot has learned;

a control unit to recognize the learned running path of the cleaning robot when a path learning operation is required, to store the recognized learned running path in the storage unit, and to drive the running unit; and

a running path detecting unit to detect the learned running path of the cleaning robot moved by a user, and to store the learned running path in the storage unit,

wherein the control unit controls the running unit when a cleaning operation of the cleaning robot along the stored learned running path is required, to allow the cleaning robot to perform the required cleaning operation while running along the stored learned running path, and

the control unit stores a reserved time in the storage unit, inputted by a user corresponding to the stored learned running path, and drives the running unit at the reserved time to allow the cleaning robot to perform the cleaning operation while running along the corresponding learned running path.

2. The cleaning robot of claim 1, wherein the running path detecting unit comprises:

a running distance detecting sensor to detect a running distance of the cleaning robot; and

a running direction detecting sensor to detect a running directional change of the cleaning robot,

wherein the control unit detects the running distance and the running directional change of the cleaning robot at intervals of a predetermined time.

3. The cleaning robot of claim 1, further comprising:

a key input unit having learning start and end buttons to be operated by the user to start and end the path learning operation,

wherein the learned running path of the cleaning robot corresponds to the cleaning path, along which the cleaning robot runs after a key signal from the learning start button is inputted and until a key signal from the learning end button is inputted.

4. The cleaning robot of claim 3, further comprising an obstacle detecting unit to detect an obstacle existing on the learned running path of the cleaning robot.

5. The cleaning robot of claim 4, wherein the obstacle detecting unit comprises a plurality of obstacle detecting sensors to detect the obstacle in accordance with a transmission and a reception of an infrared ray, and to detect a distance of the detected obstacle from the cleaning robot.

6. The cleaning robot of claim 5, wherein each obstacle detecting sensor comprises:

an infrared light emitting element to emit the infrared ray; and

a light receiving element to receive a reflected light of the infrared ray.

7. The cleaning robot of claim 3, wherein the key input unit further comprises an automatic cleaning execution button to allow the cleaning robot to perform an automatic cleaning operation while running along the learned running path stored therein.

8. The cleaning robot of claim 1, wherein the storage unit stores a plurality of learned running paths, and the control unit drives the running unit to allow the cleaning robot to perform a cleaning operation while running along one of the plurality of learned running paths selected by a user from the stored plurality of learned running paths.

9. The cleaning robot of claim 1, further comprising a running unit to drive wheel motors to rotate opposite front wheels provided at a body of the cleaning robot, to enable the cleaning robot to run or rotate.

10. The cleaning robot of claim 9, further comprising:

a suction unit and a suction motor, wherein the suction unit drives the suction motor to pick up particles attached to a bottom of the body of the cleaning robot through an inlet and to feed the particles to a dust collecting filter.

11. The cleaning robot of claim 10, further comprising a display unit to display information to allow the user to input a control command and to identify information corresponding to the inputted control command.

12. A method for controlling a cleaning robot to perform a cleaning operation while running along a cleaning path, comprising:

recognizing a learned running path of the cleaning robot when a path learning operation is required, and storing the recognized running path;

controlling the cleaning robot to perform a cleaning operation while running along the stored learned running path when a cleaning operation of the cleaning robot along the stored learned running path is require;

storing a reserved time inputted by a user corresponding to the stored learned running path; and

controlling the cleaning robot to perform the cleaning operation at the reserved time, while running along the corresponding learned running path,

wherein the recognizing of the learning running path of the cleaning robot comprises detecting the learned running path of the cleaning robot moved by a user and storing the detected learned running path.

13. A method for controlling a cleaning robot to perform a cleaning operation while running along a cleaning path, comprising:

detecting a plurality of learned running paths of the cleaning robot moved by a user, and storing the detected learned running paths;

storing reserved times respectively inputted by the user corresponding to the stored plurality of learned running paths; and

controlling the cleaning robot to perform a cleaning operation at the reserved times, while running along the corresponding plurality of learned running paths, respectively.

14. A cleaning robot for performing cleaning operations while running along cleaning paths, comprising:

a running unit to move the cleaning robot;

a storage unit to store reserved times and learned running paths corresponding to the reserved times of the cleaning robot; and

a control unit to recognize the learned running paths in the storage unit, and to drive the running unit,

wherein the cleaning robot performs the cleaning operations corresponding to the reserved times selected by a user while running along the stored learned running paths and wherein the learned running paths are determined by the robot first traversing the running paths prior to performing the cleaning operations.