ROBOT CLEANER SYSTEM AND METHOD FOR CONTROLLING A ROBOT CLEANER

• US 20110077774A1
• Filed: 06/01/2009
• Published: 03/31/2011
• Est. Priority Date: 06/02/2008
• Status: Abandoned Application

• Current Assignee: Woongjin Coway Company Limited
• Original Assignee: Woongjin Coway Company Limited
• Inventors: Choi, In-Gyue, Dan, Chul-Soon
• Application Number:
  US12/995,668
• Publication Number:
  US 20110077774A1
• Time in Patent Office: Days
• US Class Current: 700/253
• CPC Class Codes: A47L 2201/04 Automatic control of the travelling movement; Automatic obstacle detection
• CPC Class Codes: A47L 9/009 Carrying-vehicles; Arrangements of trollies or wheels; Means for avoiding mechanical obstacles
• CPC Class Codes: A47L 9/2805 Parameters or conditions being sensed
• CPC Class Codes: A47L 9/2852 Elements for displacement of the vacuum cleaner or the accessories therefor, e.g. wheels, casters or nozzles
• CPC Class Codes: A47L 9/2894 Details related to signal transmission in suction cleaners

Abstract

The present invention relates to a robot cleaner system and a method of controlling a robot cleaner. When cleaning start information is received, a control unit (17) of the robot cleaner scans one cleaning area (30), thus calculating a cleaning time. The control unit performs cleaning of the cleaning area. When a signal transmitted from a transmission device (20) is received, the control unit detects which transmitter transmitted the signal. The control unit determines whether a time for which a signal transmitted from a same transmitter has been received is equal to or longer than a preset period. If the time is shorter than the preset period, the control unit continuously performs cleaning. If the time for which the transmitted signal has been received is equal to or longer than the preset period, the control unit moves the robot cleaner until a signal transmitted from another transmitter is received.

Claims

1. A method of controlling a robot cleaner, comprising:

a calculation step of, when cleaning start information is received, a control unit of the robot cleaner scanning one cleaning area including a plurality of small regions by driving a driving unit of the robot cleaner, thus calculating a cleaning time for the cleaning area;

a cleaning step of the control unit performing cleaning of the cleaning area by driving the robot cleaner;

a detection step of, when a signal transmitted from a transmission device located in the cleaning area is received during performance of cleaning, the control unit detecting which transmitter, among a plurality of transmitters mounted in the transmission device, transmitted the signal;

a determination step of the control unit determining using results of the detection whether a time for which a signal transmitted from a same transmitter that transmitted the signal has been received is equal to or longer than a preset period stored in a storage unit of the robot cleaner;

a continuous cleaning step of, if it is determined that the time for which the transmitted signal has been received is shorter than the preset period, the control unit continuously performing cleaning of a small region in which the robot cleaner is located by driving the robot cleaner; and

a movement step of, if it is determined that the time for which the transmitted signal has been received is equal to or longer than the preset period, the control unit moving the robot cleaner until a signal transmitted from another transmitter is received.

2. The method according to claim 1, wherein the preset period is determined by the control unit using a number of transmitters and the cleaning time.

3. The method according to claim 1, wherein the determination step is performed such that the control unit determines using the results of the detection whether a sum of discontinuous times for which the signal transmitted from the same transmitter has been received is equal to or longer than the preset period.

4. The method according to claim 1, wherein the transmission device is located at a center of the cleaning area.

5. The method according to claim 1, wherein the continuous cleaning step comprises a changing step of changing a movement path of the robot cleaner when the robot cleaner receives a signal other than the transmitted signal.

6. The method according to claim 1, wherein:

the robot cleaner comprises three or more receivers, and

the three or more receivers are located on a top surface of the robot cleaner and spaced apart from one another at regular intervals so that the receivers receive signals in all directions covering 360°

.

7. The method according to claim 6, wherein:

the three or more receivers comprise one or more of a forward receiver located in a main movement direction of the robot cleaner and a backward receiver located in a direction opposite the main movement direction of the robot cleaner,

the detection step comprises the step of the control unit detecting which receiver among the three or more receivers received a signal, and

the movement step comprises the step of, if one of the forward receiver and the backward receiver received a signal as a result of the detection, rotating the robot cleaner in either a right or a left direction.

8. A robot cleaner system, comprising:

a robot cleaner for cleaning a cleaning area including a plurality of small regions;

a transmission device including a plurality of transmitters,

wherein the robot cleaner comprises;

a storage unit for storing a preset period;

a driving unit for driving the robot cleaner; and

a reception unit for receiving signals transmitted from the transmitters; and

a control unit for continuously performing cleaning if a time for which each transmitted signal has been received is shorter than the preset period, whereas moving the robot cleaner until a signal transmitted from another transmitter is received if the time for which the transmitted signal has been received is equal to or longer than the preset period.

9. The robot cleaner system according to claim 8, wherein the transmission device is located at a center of the cleaning area.

10. The robot cleaner system according to claim 8, wherein if the time for which the transmitted signal has been received is shorter than the preset period, the control unit changes a movement path of the robot cleaner when a signal other than the signal transmitted to the robot cleaner is transmitted.

11. The robot cleaner system according to claim 8, wherein the control unit calculates a cleaning time by scanning the cleaning area, and can determine the preset period using a number of transmitters and the cleaning time.

12. The robot cleaner system according to claim 8, wherein:

the reception unit comprises three or more receivers, and

the three or more receivers are located on a top surface of the robot cleaner and spaced apart from one another at regular intervals so that the receivers receive signals in all directions covering 360°

.

13. The robot cleaner system according to claim 12, wherein:

the three or more receivers comprise one or more of a forward receiver located in a main movement direction of the robot cleaner and a backward receiver located in a direction opposite the main movement direction of the robot cleaner,

the control unit detects which receiver among the three or more receivers received the signal, and

the control unit rotates and moves the robot cleaner in either a right or a left direction if the time for which the transmitted signal has been received is equal to or longer than the preset period, and one of the forward receiver and the backward receiver received a signal.