Patent Publication Number: US-2021161351-A1

Title: Pollution source determination robot cleaner and operating method thereof

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is based on and claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2019-0159327, filed on Dec. 3, 2019, in the Korean Intellectual Property Office, the disclosure of which is incorporated by reference herein in its entirety. 
     BACKGROUND 
     1. Field 
     The disclosure relates to a robot cleaner, and for example, to a robot cleaner which sets a moving path based on the location of a pollution source mapped to an event. 
     2. Description of Related Art 
     In the past, a robot cleaner which performed cleaning based on a pollution map for a specific place was disclosed. 
     However, according to the general technological common sense in the past, it is difficult for a robot cleaner to identify the current degree of pollution of each location unless the robot cleaner directly moves to each location. 
     Accordingly, a robot cleaner sets a moving path based on a pollution map in the past for optimization of a moving path. 
     However, in this case, the degree of pollution of each location at the present point is not reflected, and thus efficient and effective cleaning is difficult. 
     SUMMARY 
     A robot cleaner according to an example embodiment of the disclosure includes: a driver comprising a drive motor configured to move the robot cleaner, a memory storing information on a pollution map including a degree of pollution for each location in a map corresponding to a place in which the robot cleaner is located and information on locations of a plurality of objects on the map, and a processor operatively connected to the motor and the memory and configured to control the robot cleaner, wherein the processor is configured to: identify a pollution source among the plurality of objects based on information on the locations of the plurality of objects and the pollution map, and control the motor to move the robot cleaner based on the location of the identified pollution source on the map. 
     A method for operating a robot cleaner according to an example embodiment of the disclosure includes: identifying a pollution source among a plurality of objects based on information on locations of the plurality of objects and a pollution map, and moving the robot cleaner based on the location of the identified pollution source, wherein the pollution map includes information on a degree of pollution for each location in a map corresponding to a place in which the robot cleaner is located, and information on the locations of the plurality of objects includes information on the locations of the plurality of objects on the map. 
     A non-transitory computer-readable recording medium according to an example embodiment of the disclosure stores at least one instruction that is executable by a processor of a robot cleaner, and when executed, causes the robot cleaner perform operations including: identifying a pollution source among a plurality of objects based on information on locations of the plurality of objects and a pollution map, and moving the robot cleaner based on the location of the identified pollution source, wherein the pollution map includes information on a degree of pollution for each location in a map corresponding to a place in which the robot cleaner is located, and information on the locations of the plurality of objects includes information on the locations of the plurality of objects on the map. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features and advantages of certain embodiments of the present disclosure will be more apparent from the following detailed description, taken in conjunction with the accompanying drawings, in which: 
         FIG. 1A  is a diagram illustrating an example in which a robot cleaner determines a pollution source corresponding to a specific event according to various embodiments; 
         FIG. 1B  is a diagram illustrating an example in which a robot cleaner determines a pollution source corresponding to a specific event according to various embodiments; 
         FIG. 2  is a block diagram illustrating an example configuration of a robot cleaner according to various embodiments; 
         FIG. 3  is a diagram illustrating an example in which a robot cleaner determines a pollution source corresponding to a specific event according to various embodiments; 
         FIG. 4A  is a diagram illustrating an example in which a robot cleaner determines a pollution source corresponding to a specific event according to various embodiments; 
         FIG. 4B  is a diagram illustrating an example in which a robot cleaner determines a pollution source corresponding to a specific event according to various embodiments; 
         FIG. 4C  is a diagram illustrating an example in which a robot cleaner determines a pollution source corresponding to a specific event according to various embodiments; 
         FIG. 4D  is a chart illustrating an example in which a robot cleaner determines a pollution source corresponding to a specific event according to various embodiments; 
         FIG. 5A  is a diagram illustrating an example in which a robot cleaner generates a map of a specific place, and generates information on the locations of a plurality of objects on the map according to various embodiments; 
         FIG. 5B  is a diagram illustrating an example in which a robot cleaner generates a map of a specific place, and generates information on the locations of a plurality of objects on the map according to various embodiments; 
         FIG. 6A  is a diagram illustrating an example operation of a robot cleaner in case the location of a pollution source is changed according to various embodiments; 
         FIG. 6B  is a diagram illustrating an example operation of a robot cleaner in case the location of a pollution source is changed according to various embodiments; 
         FIG. 6C  is a diagram illustrating an example operation of a robot cleaner in case the location of a pollution source is changed according to various embodiments; 
         FIG. 6D  is a diagram illustrating an example operation of a robot cleaner in case the location of a pollution source is changed according to various embodiments; 
         FIG. 7A  is a diagram illustrating an example in which a robot cleaner sets a moving path in case a pollution source is a movable object according to various embodiments; 
         FIG. 7B  is a diagram illustrating an example in which a robot cleaner sets a moving path in case a pollution source is a movable object according to various embodiments; 
         FIG. 7C  is a diagram illustrating an example in which a robot cleaner sets a moving path in case a pollution source is a movable object according to various embodiments; 
         FIG. 8  is a diagram illustrating an example of a robot cleaner that sets a moving path based on communication with external devices including a server device and an external terminal device according to various embodiments; 
         FIG. 9  is a block diagram illustrating an example configuration of a robot cleaner according to various embodiments; 
         FIG. 10  is a flowchart illustrating an example method for operating a robot cleaner according to various embodiments; and 
         FIG. 11  is a flowchart illustrating an example operating method according to various embodiments. 
     
    
    
     DETAILED DESCRIPTION 
     The disclosure provides a robot cleaner capable of setting an optical moving path when cleaning based on the time when various events occur. 
     The disclosure provides a robot cleaner that can determine the main pollution source mapped to each event, and can set a moving path based on the location of the determined pollution source. 
     Before describing the disclosure in detail, the format of this disclosure and the drawings will be discussed. 
     As terms used in this disclosure and the claims, general terms were selected in consideration of the functions described in the various example embodiments of the disclosure. However, the terms may vary depending on the intention of those skilled in the art who work in the pertinent field, legal or technical interpretation, emergence of new technologies, and the like. There may be some terms that are arbitrarily selected, and in such cases, the meaning of the terms should be interpreted in view of the disclosure. In case there is no specific definition of the terms, the meaning of the terms will be interpreted based on the overall content of the disclosure and common technical knowledge in the pertinent technical field. 
     Like reference numerals or symbols described in each drawing accompanying this disclosure indicate parts or components that perform substantially the same functions. For the convenience of explanation and understanding, the parts or components will be described using the same reference numerals or symbols in different embodiments. That is, even if a plurality of drawings all illustrate components having the same reference numerals, the plurality of drawings do not refer only to one embodiment. 
     In addition, in this disclosure and the claims, terms including ordinal numbers such as “the first” and “the second” may be used for distinguishing elements. These ordinal numbers are used to distinguish the same or similar elements from one another, and the meaning of terms should not be restrictively interpreted due to the use of such ordinal numbers. As an example, the order of using or the order of arranging elements combined with such ordinal numbers should not be restricted by the numbers. Depending on needs, each ordinal number may be used by being replaced with one another. 
     In this disclosure, singular expressions include plural expressions, as long as they do not conflict with the context. In addition, in the disclosure, terms such as “include” and “consist of” should be construed as designating that there are such characteristics, numbers, steps, operations, elements, components or a combination thereof described in the disclosure, but not as excluding in advance the existence or possibility of adding one or more of other characteristics, numbers, steps, operations, elements, components or a combination thereof. 
     In the embodiments of the disclosure, terms such as “module,” “unit,” “part,” etc. are terms referring to elements performing at least one function or operation, and these elements may be implemented as hardware or software, or a combination of hardware and software. In addition, a plurality of “modules,” “units,” “parts,” etc. may be integrated into at least one module or chip and implemented as at least one processor, excluding “a module,” “a unit,” “a part,” etc. that needs to be implemented as independent specific hardware. 
     In the embodiments of the disclosure, the description that a part is “connected to” another part includes not only direct connection, but also indirect connection through still another medium. The description that a part “includes” an element can be interpreted to include other elements, but not that other elements are excluded, unless there is any specific description to the contrary. 
       FIG. 1A  is a diagram illustrating an example in which a robot cleaner generates a pollution map according to various embodiments. A pollution map may include, for example, data indicating the degree of pollution for each location in a map corresponding to a place in which the robot cleaner  100  is located. 
     The robot cleaner  100  may perform cleaning (e.g., suctioning of dust/foreign substances) while traveling around each section of the place in which the robot cleaner  100  is located. 
     Referring to  FIG. 1A , while the robot cleaner  100  is located on one point  1 ′ on a map  1  corresponding to the place, the robot cleaner  100  may perform suctioning, etc. and at the same time, identify the degree of pollution of the area including the point  1 ′. 
     For example, the robot cleaner  100  may determine the degree of pollution of the area through a pollution sensor provided on the robot cleaner  100 . The pollution sensor may be provided as various sensors such as, for example, and without limitation, an optical sensor, a piezoelectric sensor, an acceleration sensor, etc. and provided on the outer surface or the inside of the robot cleaner  100 . The robot cleaner  100  may identify the amount of foreign substances to be suctioned into the robot cleaner  100 , the amount of foreign substances being suctioned into the robot cleaner  100 , or the amount of foreign substances suctioned into the robot cleaner  100  using sensing data received through the pollution sensor. The robot cleaner  100  may determine the degree of pollution of the area based on the identified amount of foreign substances. Various embodiments related to the pollution sensor will be described in greater detail below with reference to the pollution sensor  160  in  FIG. 9 . 
     Referring to  FIG. 1A , the robot cleaner  100  may identify the amount of foreign substances in the area including the point  1 ′ as ‘a lot,’ and as a result of this, the robot cleaner  100  may acquire a pollution map  2  including information that the degree of pollution of the area  2 ′ is high on the map  1 . 
     As described above, the robot cleaner  100  may acquire a pollution map  2  each time through the pollution sensor, etc. 
       FIG. 1B  is a diagram illustrating an example in which a robot cleaner determines a pollution source corresponding to a specific event according to various embodiments. 
     Referring to the event timeline  3  in  FIG. 1B , ‘breakfast’ starts at 7 a.m. The event timeline  3  may refer, for example, to information on various events that occurred for each time or information wherein information on the time when one or more events respectively occurred is stored in a temporal order, and it may be stored inside the robot cleaner  100 . 
     For convenience of understanding, on the pollution map  2  in  FIG. 1B , the locations of a plurality of objects  11 ,  12 ,  13 ,  14  located on the map are illustrated together. Information on the locations of the plurality of objects may be included in the pollution map  2  as in  FIG. 1B  or stored in the robot cleaner  100  separately from the pollution map  2 . 
     On the pollution maps  2 - 1 ,  2 - 2 ,  2 - 3  in  FIG. 1B , areas having a higher degree of pollution are displayed to be darker. 
     Referring to  FIG. 1B , compared to the pollution maps  2 - 1 ,  2 - 2  at 6 a.m. and 7 a.m., the degree of pollution of the pollution map  2 - 3  at 8 a.m. is relatively increased. For example, the degree of pollution around ‘the dining table’  14  increased greatly. 
     In this case, based on the event timeline  1  and the pollution map  2 , the robot cleaner  100  may identify that the pollution source corresponding to the ‘breakfast’ event is ‘the dining table’  14 . 
     Thereafter, every 8 a.m. when a specific time (e.g., one hour) has passed from 7 a.m. when the ‘breakfast’ event occurred, the robot cleaner  100  may set a moving path centered on the surroundings of ‘the dining table’ which is identified a pollution source mapped to the ‘breakfast’ event and perform cleaning. 
     As described above, the robot cleaner  100  according to the disclosure may determine a pollution source mapped to an event by itself and select an optimal moving path that suits the time point of occurrence of the event. As a result, the moving line of the robot cleaner  100  is optimized and/or improved, and the cleaning function may also be intensified. 
     Hereinafter, example operation of the robot cleaner  100  will be described in greater detail with reference to the drawings. 
       FIG. 2  is a block diagram illustrating an example configuration of the robot cleaner  100  according to various embodiments. 
     Referring to  FIG. 2 , the robot cleaner  100  may include a driver (e.g., a drive motor and associated elements that cause movement of the robot cleaner)  110  which may be referred to hereinafter as a drive motor for simplicity of description, a memory  120 , and a processor (e.g., including processing circuitry)  130 . 
     In the memory  120 , a pollution map  121  regarding the degree of pollution for each location in a map corresponding to a place wherein the robot cleaner  100  is located and information  122  on the locations of a plurality of objects on the map may be stored. 
     The processor  130  may include various processing circuitry and identify a pollution source among the plurality of objects based on the information  122  on the locations of the plurality of objects and the pollution map  121 . 
     The information  122  on the locations of the plurality of objects may be stored in advance, or may be the result of recognition of objects by the robot cleaner  100  reflected on the map stored in the memory  120 . For example, the processor  130  may input an image acquired through the camera on the place corresponding to the map into an artificial intelligence model for recognizing objects and identify a plurality of objects. The processor  130  may identify the locations of each of the plurality of identified objects on the place through sensing data received through a sensor for acquiring information on the surrounding environment (e.g., a LIDAR sensor, an ultrasonic sensor, a 3D sensor, etc.) and generate information on the locations. The information on the locations may be stored in forms of locations on the map stored in the memory  120  in advance. 
     The processor  130  may identify a location on a map wherein the degree of pollution increased using the pollution map  121  each time. The processor  130  may identify an object existing in the location wherein the degree of pollution increased as a pollution source based on the information  122  on the locations of the plurality of objects. 
     When a predetermined event occurs, the processor  130  may identify a pollution source corresponding to the event among the plurality of objects based on the information  122  on the locations of the plurality of objects and the pollution map  121 . 
     A predetermined event may include various events that become factors for increasing the degree of pollution of the place wherein the robot cleaner  100  is located. For example, if the place wherein the robot cleaner  100  is located is ‘a home,’ various events such as ‘breakfast/lunch/dinner,’ ‘cooking,’ ‘pet food,’ ‘indoor exercise,’ ‘ventilation,’ etc. may be included in the predetermined event. 
     The processor  130  may acquire the starting/finishing time point of a specific event through a user input and construct an event timeline. For example, the robot cleaner  100  may receive an input of information that ‘ventilation’ is performed from 10 a.m. to 11 a.m. from a user. As another example, the robot cleaner  100  may receive an input of information that ‘indoor exercise’ starts (now) from a user. A user input may be directly received at the robot cleaner  100 , but information on a user input received through an external terminal device, etc. may be received at the robot cleaner  100 . 
     The processor  130  may acquire a pollution map related to a time point when an event occurred. 
     The processor  130  may acquire a pollution map related to a time point when an event occurred among pollution maps acquired for each time through a pollution sensor, etc. provided on the robot cleaner  100  or acquire a pollution map related to a time point when an event occurred among pollution maps received from an external device. 
     For example, the processor  130  may acquire a pollution map during the time section including a time point when an event occurred. In this case, the processor  130  may acquire a pollution map until a predetermined time period passed from the time point when the event occurred or until a predetermined time period passed from a specific time point before the time point when the event occurred. 
     Based on the acquired pollution map, the processor  130  may identify a location on the map wherein the degree of pollution increased based on the occurrence of the event. Based on the information  122  on the locations of a plurality of objects, the processor  130  may identify the object existing in the location wherein the degree of pollution increased as a pollution source corresponding to the event. 
     The processor  130  may determine a pollution source corresponding to the event using an artificial intelligence model trained to identify pollution sources for at least one event based on an event timeline and a pollution map. 
     The processor  130  may control the driver  110  such that the robot cleaner  100  moves based on the location of the identified pollution source on the map. 
     For example, the processor  130  may set a moving path such that the robot cleaner  100  goes through at least some of areas belonging to a predetermined range from the location of the identified pollution source. While the robot cleaner  100  moves in the set moving path, the processor  130  may perform cleaning by controlling the suctioning part, etc. of the robot cleaner  100 . 
     Within a predetermined time period after the pollution source is identified, the processor  130  may control the driver  110  such that the robot cleaner  100  is caused to move based on the location of the identified pollution source. In addition, the processor  130  may control the robot cleaner  100  to perform cleaning through the suctioning part, etc. at the same time as moving. 
     In case the event occurs again later, the processor  130  may control the driver  110  such that the robot cleaner  100  moves based on the location of the pollution source. The processor  130  may control portions of the robot cleaner  100  such as the suctioning part and clean the moving path of the robot cleaner  100 . 
     The processor  130  may control the driver  110  such that the robot cleaner  100  moves to the moving path after the event is finished. 
     In case the finishing time point of the event on the event timeline is not clear, the processor  130  may control the driver  110  such that the robot cleaner  100  moves to the moving path at a specific time point after the time point when the event occurred. 
     The specific time point may, for example, be a time point when the degree of pollution does not increase greatly any more after the degree of pollution on the pollution map increased according to the occurrence of the event. For example, the specific time point may be a time point when the speed of increase of the degree of pollution on the pollution map was maintained as much as a threshold time in a state of being lower than a threshold value after the time point of occurrence of the event in the past. 
     For example, a case where there is a history that the degree of pollution on the pollution map continuously increased by greater than or equal to a specific value after ‘breakfast’ started at 7 a.m., and from 8 a.m., the degree of pollution on the pollution map increased by lower than the specific value is assumed. If ‘breakfast’ starts at 7 a.m. on another day afterwards, the processor  130  may control the driver  110  such that the robot cleaner  100  moves to the moving path from 8 a.m. 
     It is possible that the processor  130  controls the driver  110  such that the robot cleaner  100  moves to the moving path from a specific time point before the event is finished after it occurred. 
     The driver  110  may refer, for example, to a component or collection of components configured to move or cause movement of the robot cleaner  100 . The driver  110  may be implemented in various forms such as, for example, and without limitation, a drive motor, a wheel, a wing, a propeller, etc., and may include an actuator, etc. for implementing physical driving based on electric energy. 
     In the memory  120 , various information related to the functions of the robot cleaner  100  may be stored. The memory  120  may include, for example, and without limitation, a hard disc, an SSD, a flash memory, etc. in addition to a ROM and a RAM. 
     The processor  130  may include various processing circuitry connected with the driver  110  and the memory  120  and controlling the robot cleaner  100 . 
       FIG. 3  is a diagram illustrating an example in which a robot cleaner determines a pollution source corresponding to a specific event according to various embodiments. 
     Referring to  FIG. 3 , in the memory  120 , a first artificial intelligence model (e.g., including various executable program elements)  125  trained to determine what a pollution source corresponding to an event is may be stored. 
     The processor  130  may input information on the locations of a plurality of objects and a pollution map related to a time point when an event occurred into the first artificial intelligence model  125  and determine a pollution source corresponding to the event. 
     Referring to  FIG. 3 , the processor  130  may input information  310  regarding locations of each of the objects such as a TV  11 , a sofa  12 , a bed  13 , a dining table  14 , etc. into the first artificial intelligence model  125 . In addition, the processor  130  may input pollution maps  320  during the time section  321  from the time point t when an event occurred to a predetermined time point t+T after the event was finished into the first artificial intelligence model  125 . 
     As a result, the first artificial intelligence model  125  may output information  330  on a pollution source corresponding to the event among the plurality of objects  11 ,  12 ,  13 ,  14 . Information  330  on the pollution source may include, for example, and without limitation, the name, kind, location, etc. of the pollution source. 
     Even though only the pollution maps  320  from the time point t when an event occurred to a predetermined time point t+T after the event was finished are input into the first artificial intelligence model  125  through  FIG. 3 , the pollution maps  320  from a time point before the time point t when an event occurred to the predetermined time point t+T may be input into the first artificial intelligence model  125 . 
       FIG. 3  illustrates an example including minimal input data for determining a pollution source corresponding to a specific event was specified. However, it will be understood that the first artificial intelligence model  125  may be trained to determine a pollution source based on complex input data in a larger amount. 
     As an example, the first artificial intelligence model  125  may receive inputs of all information regarding event timelines for various events that occurred during a time period of a week or a month or longer, pollution maps during the time period, and locations of a plurality of objects, and may be trained to determine at least one pollution source corresponding to each of the plurality of events based on the information. 
     In this case, the same event (e.g., breakfast, bathing a puppy, ventilation, etc.) may occur repetitively a plurality of times during the time period, and thus the first artificial intelligence model  125  may determine a pollution source corresponding to the event based on pollution maps of various cases derived from the same event. As a result, the accuracy of determination of the pollution source based on the first artificial intelligence model  125  can be improved. 
       FIGS. 4A, 4B, 4C and 4D  are diagrams for illustrating another example in which a robot cleaner determines a pollution source corresponding to a specific event according to various embodiments. 
     The processor  130  may determine a location on the map wherein the degree of pollution increased by greater than or equal to a threshold value after a time point when an event occurred based on the pollution map. For example, referring to  FIG. 4A , the processor  130  may compare the pollution maps  410 ,  420  before and after ‘TV watching’ and identify an area  421  wherein the degree of increase of the degree of pollution is greater than or equal to a threshold value. 
     In this case, the processor  130  may input an image acquired through the camera in the determined location into the second artificial intelligence model and identify at least one object. The second artificial intelligence model is stored in the memory  120 , and it may be trained to identify at least one object included in an image when an image is input. 
     For example, referring to  FIG. 4B  and  FIG. 4C , the processor  130  may acquire an image  430  for at least one object existing in the area  421  through the camera of the robot cleaner  100 , input the acquired image  430  into the second artificial intelligence model and identify objects (the table  431 , the sofa  432 ) existing in the area  421  or around the area  421 . 
     The processor  130  may determine at least one of the identified objects as a pollution source corresponding to the event occurred. 
     The processor  130  may generate or update event-pollution source mapping information based on information on the determined pollution source. The event-pollution source mapping information includes information on pollution sources respectively mapped to one or more events, and it may be stored in the memory  120 . 
     Referring to  FIG. 4D , the processor  130  may identify both of the identified table  431  and sofa  432  as pollution sources mapped to the ‘TV watching’ event, and update the mapping information  441  based on this. As a result, ‘the table’ and ‘the sofa’ are mapped to the ‘TV watching’ event on the updated mapping information  442 . 
     In case the ‘TV watching’ event occurs again later, the processor  130  may identify that the pollution sources are ‘the table’ and ‘the sofa’ based on the mapping information  442 , and control the driver  110  such that the robot cleaner  100  moves based on the locations of the identified ‘table’ and ‘sofa’ on the map. 
     Referring to  FIG. 3  described above, in case a pollution source corresponding to a specific event is determined, mapping information can be updated based on information on the determined pollution source as in  FIG. 4D . 
     Even though information on a pollution source is described as texts such as ‘the dining table,’ ‘the window,’ ‘the flow pot,’ ‘the table,’ ‘the sofa,’ etc. in  FIG. 4D , information in different forms such as an image wherein each of the aforementioned pollution sources is photographed, etc. may be included in the mapping information. 
     Even though the robot cleaner  100  moved to a location wherein the degree of pollution increased by greater than or equal to a threshold value (e.g., the area  421 ) and identified objects existing in the location (e.g.,  431 ,  432 ) in  FIG. 4B  and  FIG. 4C , it is also possible that the robot cleaner  100  identifies objects existing in the location using information on the locations of a plurality of objects stored in the memory  120 , and identifies the identified objects directly as pollution sources. 
     The processor  130  may generate or update the map of the place wherein the robot cleaner is located. The processor  130  may store the map in the memory  120 . The map may refer, for example, to data showing the physical topography of the place wherein the robot cleaner  100  is driven. The map may be stored in the form of, for example, an image or in the form of sensing data of at least one sensor provided on the robot cleaner  100 , but is not limited thereto. 
       FIGS. 5A and 5B  are diagrams illustrating an example in which a robot cleaner generates a map of a specific space, and generates information on the locations of a plurality of objects on the map according to various embodiments. 
     Referring to  FIG. 5A , the processor  130  may acquire information on the structure of the place wherein the robot cleaner  100  is located based on sensing data received from the sensor for acquiring information on the surroundings of the robot cleaner  100  such as, for example, and without limitation, a LIDAR sensor, an ultrasonic sensor, a 3D sensor, etc. The processor  130  may generate a map  500  based on the acquired information on the structure. 
     In addition, the processor  130  may input an image acquired through the camera in the space indicated by the map  500  into the second artificial intelligence model trained to identify objects and identify the objects in the place. 
     The processor  130  may generate information  122  (refer to  FIG. 2 ) for the locations of the plurality of objects based on sensing data for the identified objects acquired from the sensor. For example, the processor  130  may compare sensing data used for generating the map and sensing data for the surroundings of the identified objects and identify the locations of the objects on the map. 
     As a result, referring to  FIG. 5B , the processor  130  may identify the locations of the identified objects (e.g., the TV  510 , the sofa  520 , the bed  530 , the dining table  540 , etc.) on the map  500 , and generate information  122  on the locations of the plurality of objects on the map based on the identified locations. 
     As described above, as a result of the processor  130  generating and updating a map, information on the locations of a plurality of objects, etc. automatically, the robot cleaner  100  can cope with changes of the surrounding environment such as a user&#39;s moving or remodeling quickly. 
       FIG. 6A, 6B, 6C  and  FIG. 6D  are diagrams illustrating an example operation of a robot cleaner in case the location of a pollution source is changed according to various embodiments. 
     Referring to  FIG. 6A , in case a ‘ventilation’ event occurs, the processor  130  of the robot cleaner  100  may identify that the pollution sources are ‘the window’  610  (refer to  FIG. 6B ) and ‘the flower pot’  620  (refer to  FIG. 6B ) through event-pollution source mapping information stored in the memory  120 . 
     In this case, the processor  130  may determine the locations of ‘the window’ and ‘the flow pot’ using the information  122  on locations, and control the driver  110  such that the robot cleaner  100  moves to the locations. 
     Referring to  FIG. 6B , as a result of the location of the flower pot  620  being changed by a user, the flower pot  620  may not exist in ‘the location of the flower pot’ indicated by the information  122  on locations. Referring to  FIG. 6C , the processor  130  may identify that the flower pot  620  does not exist in the location through the sensing data of the sensor and/or an image of the camera. 
     Referring to  FIG. 6D , the processor  130  may control the driver  110  such that the robot cleaner  100  moves to look for the flower pot  620 , and at the same time, search the flower pot  620  through the sensing data received through the sensor and the image acquired through the camera. 
     In case the flower pot  620  is identified, the processor  130  may update the information  122  on locations based on the changed location of the flower pot  620 . 
     In case the flower pot  620  is not identified even though the robot cleaner  100  searched all places on the map, the processor  130  may delete ‘the flower pot’ among the pollution sources mapped to ‘ventilation’ in the event-pollution source mapping information. 
     As described above, even if the location of a pollution source is changed or a pollution source does not exist anymore, the information  122  on locations and/or the event-pollution source mapping information may be updated automatically. Accordingly, even if the same event is repeated, a flexible moving path may be selected according to the surrounding environment. 
     In case the identified pollution source is a movable object, the processor  130  may control the driver  110  such that the robot cleaner  100  moves based on the location to which the identified pollution source moves on the map. The processor  130  may identify the moving path of the pollution source using the sensor and the camera of the robot cleaner  100  and/or identify the moving path of the pollution source based on information received from an external device. 
     As an example, in case a camera and a sensor for acquiring information on the surrounding environment are provided on the robot cleaner  100 , the processor  130  may identify the moving path of the pollution source based on output of the second artificial intelligence model for an image acquired through the camera and sensing data acquired through the sensor. 
       FIG. 7A, 7B  and  FIG. 7C  are diagrams illustrating an example in which a robot cleaner sets a moving path in case a pollution source is a movable object according to various embodiments. 
     Referring to  FIG. 7A , in case a ‘bathing of a puppy’ event occurs, the processor  130  may identify that the pollution source is ‘a puppy’ based on the event-pollution source mapping information stored in the memory  120 . 
     Referring to  FIG. 7B , the processor  130  may input a plurality of images  710 ,  720  acquired through the camera into the second artificial intelligence model and identify the puppy  701 . The processor  130  may identify the moving path  702  of the puppy  701  using the location of the puppy  701  in the plurality of images  710 ,  720  and sensing data for the puppy  701  received from the sensor. The moving path  702  may include a plurality of locations on the map. 
     Referring to  FIG. 7C , the processor  130  may control the driver  110  such that the robot cleaner  100  moves according to the identified moving path  702 . 
     The processor  130  may identify the moving path of the pollution source based on information on the location of the pollution source received from an external device through, for example, a communicator. 
     For example, if an image or sensing data for the puppy  701  is received from one or more sensors or cameras installed in the place wherein the robot cleaner  100  is located, the processor  130  may identify the location of the puppy  701  based on the received image and sensing data. 
     In this case, the processor  130  may control the driver  110  such that the robot cleaner  100  moves to the location wherein the puppy  701  is located, and after the robot cleaner  100  approached the puppy  701 , the processor  130  may operate as in the examples of  FIG. 7A, 7B  and  FIG. 7C  and set the moving path of the robot cleaner  100  according to the moving path of the puppy  701 . 
     The processor  130  may identify which event is an event that increases the degree of pollution based on an event timeline and a pollution map  121 . 
     For example, the processor  130  may identify at least one event that increases the degree of pollution of the pollution map  121  by greater than or equal to a threshold value among at least one event occurred based on information on the time when at least one event occurred (e.g., event timeline) in one time section and the pollution map  121  during the time section. 
     In this case, the processor  130  may identify a pollution source corresponding to the identified event. For example, the processor  130  may identify a pollution source mapped to the identified event among the plurality of objects based on the information  122  on the locations of the plurality of objects and the pollution map  121  related to the time point when the identified event occurred. 
     For example, in case various events such as ‘cooking,’ ‘TV watching,’ ‘sleeping,’ etc. occurred at least once respectively for a week, but the degree of pollution of the pollution map  121  increased by greater than or equal to a threshold value right after the ‘cooking’ event, the processor  130  may identify that the ‘cooking’ event is an event that increases the degree of pollution. 
     The processor  130  may identify the location on the map in which the degree of pollution increased according to the ‘cooking’ event, and identify objects existing in the location (e.g., a sink, an oven, a refrigerator, etc.) as pollution sources. When a time point when the ‘cooking’ event occurs again (or after a specific time period from the time point) comes, the processor  130  may control the driver  110  such that the robot cleaner  100  moves based on the locations of the objects identified as pollution sources. 
       FIG. 8  is a diagram illustrating an example of a robot cleaner that sets a moving path based on communication with external devices including a server device and an external terminal device according to various embodiments. 
     Referring to  FIG. 8 , the robot cleaner  100  may perform communication with external devices such as, for example, and without limitation, smartphones  200 - 1 ,  2  and a server device  300 . In this case, the electronic device  100  may perform communication with the external devices  200 - 1 ,  200 - 2 ,  300  through a repeater device  400  including, for example, a router, etc. 
     The robot cleaner  100  may identify the occurring/finishing time point of an event according to information received from the external device  200 - 1  or the external device  200 - 2 . For example, information on the occurring/finishing time point of an event that a user input into the external device  200 - 1  or the external device  200 - 2  may be received at the robot cleaner  100 . 
     The robot cleaner  100  may transmit information on the pollution map  121  acquired in real time and/or information on the location of the robot cleaner  100  on the map to the external device  200 - 1  and/or the external device  200 - 2 . The robot cleaner  100  may transmit information on the event timeline  123  to the external device  200 - 1  and/or the external device  200 - 2 . 
     In addition to the above, the robot cleaner  100  may, for example, and without limitation, transmit information on the moving paths of the robot cleaner  100  for each time in the past, information on the expected moving paths of the robot cleaner  100  for each time according to event timelines and pollution sources, information on the suctioning amount of foreign substances of the robot cleaner  100  for each time, information on the expected result of the suctioning amount of foreign substances of the robot cleaner  100  for each time, information on the used amount/remaining amount of the battery by the robot cleaner  100 , information on the expected used amount/remaining amount of the battery by the robot cleaner  100 , information on the types/locations of pollution sources corresponding to an event that is currently proceeding, etc. to the external device  200 - 1  and/or the external device  200 - 2 . 
     The external device  200 - 1  or the external device  200 - 2  may output the received various information visually/acoustically and provide the information to the user. 
     An artificial intelligence model trained to determine pollution sources may be stored in the server device  300 . 
     In this case, the robot cleaner  100  may transmit information on the event timeline and the pollution map  121  to the server device  300 . The server device  300  may transmit information on the location on the map wherein the degree of pollution increased according to occurrence of the event to the robot cleaner  100 . 
     In this case, the robot cleaner  100  may move to the location and acquire an image through the camera, and identify at least one object included in the acquired image. Then, the robot cleaner  100  may transmit information on the identified at least one object to the server device  300 . 
     The server device  300  may identify a pollution source corresponding to the event occurred among the identified at least one object, and transmit information on the identified pollution source to the robot cleaner  100 . 
     As a result, in case the event occurs again later, the robot cleaner  100  may control the driver  110  such that the robot cleaner  100  moves based on the location of the pollution source. 
       FIG. 9  is a block diagram illustrating an example configuration of a robot cleaner according to the various embodiments. 
     Referring to  FIG. 9 , the robot cleaner  100  may further include a camera  140 , a sensor  150 , a pollution sensor  160 , a communicator (e.g., including communication circuitry)  170 , etc. in addition to the driver  110 , the memory  120 , and the processor  130 . 
     In the memory  120 , an event timeline  123  and event-pollution source mapping information  124 , etc. may be additionally stored in addition to the pollution map  121  and information  122  on the locations of objects. 
     The event timeline  123  may include information on various events that occurred for each time or information wherein information on the time when one or more events respectively occur/end is stored in a temporal order. 
     In the event-pollution source mapping information  124  may include information on pollution sources mapped to each event is included, as described above. 
     In addition, in the memory  120 , one or more artificial intelligence models including, for example, executable program elements, such as a first artificial intelligence model  125  trained to determine pollution sources and a second artificial intelligence model  126  trained to identify objects, etc. may be stored. 
     For example, in a storage such as a hard disc or an SSD, etc. in the memory  120 , one or more artificial intelligence models may be stored. 
     The functions of the stored artificial intelligence models may be performed through the processor  130  and the memory  120 . 
     For this, the processor  130  may include, for example, and without limitation, one or a plurality of processors. The one or plurality of processors may include generic-purpose processors such as, for example, and without limitation, a CPU, a dedicated processor, an AP, a digital signal processor (DSP), etc., graphic-dedicated processors such as a GPU, a vision processing unit (VPU), etc., artificial intelligence-dedicated processors such as an NPU, or the like. 
     The one or plurality of processors may perform control to process input data according to predefined operation rules or artificial intelligence models stored in the memory  120 . In case the one or plurality of processors are artificial intelligence-dedicated processors, the artificial intelligence-dedicated processors may be designed in a hardware structure specialized for processing of a specific artificial intelligence model. 
     The predefined operation rules or artificial intelligence models are characterized in that they are made through learning. Being made through learning may refer, for example, to predefined operations rules or artificial intelligence models having desired characteristics being made by applying a learning algorithm to a plurality of learning data. Such learning may be performed in a device itself wherein artificial intelligence is performed according to the disclosure, or through a separate server/system. 
     As non-limiting examples of learning algorithms, there are supervised learning, unsupervised learning, semi-supervised learning, reinforcement learning, or the like, but learning algorithms are not limited to the aforementioned examples. 
     An artificial intelligence model may include a plurality of neural network layers. Each of the plurality of neural network layers may include a plurality of weight values, and may perform a neural network operation through an operation between the operation result of the previous layer and the plurality of weight values. The plurality of weight values that the plurality of neural network layers have may be optimized by a learning result of an artificial intelligence model. For example, the plurality of weight values may be updated such that a loss value or a cost value acquired from an artificial intelligence model during a learning process is reduced or minimized 
     An artificial neural network may include, for example, and without limitation, a deep neural network (DNN), and may include, for example, and without limitation, a convolutional neural network (CNN), a deep neural network (DNN), a recurrent neural network (RNN), a restricted Boltzmann Machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), deep Q-networks, etc., but the neural network according to the disclosure is not limited to the aforementioned examples excluding specified cases. 
     The processor  130  may perform various operations by selectively executing/controlling a pollution map module (e.g., including processing circuitry and/or executable program elements)  131 , an event management module (e.g., including processing circuitry and/or executable program elements)  132 , a pollution source determination module (e.g., including processing circuitry and/or executable program elements)  133 , a moving path setting module (e.g., including processing circuitry and/or executable program elements)  134 , etc. 
     Each of these modules may be stored as software on the ROM on the memory  120  or implemented as hardware including circuitry. Each of these modules may be implemented as a form wherein software and hardware are combined. 
     The pollution map module  131  may include various processing circuitry and/or executable program elements and generate/update the pollution map  121  stored in the memory  120  for each time based on the sensing data of the pollution sensor  160 . 
     The pollution map module  131  may generate/update the pollution map  121  stored in the memory  120  for each time based on information received from an external device. 
     The event management module  132  may include various processing circuitry and/or executable program elements and manage information on an event constituting the event timeline  122  stored in the memory  120  or information on the time when the event occurred/ended. 
     At least a part of the event timeline  123  may be generated/updated based on information that a user input or information received from an external device. 
     For example, in case a user input information that ‘exercise’ starts from now into the robot cleaner  100 , the event management module  132  may add information that ‘exercise’ starts at the present time to the event timeline  123 . 
     For example, in case a user input information that ‘breakfast’ starts at 8 a.m. and ends at 9 a.m. into a smartphone, etc. which is an external device, the information that the smartphone transmitted may be received at the robot cleaner  100  through the communicator  170 . In this case, the event management module  132  may add information that from 8 a.m. to 9 a.m. is the time of ‘breakfast’ to the event timeline  123 . 
     The pollution source determination module  133  may include various processing circuitry and/or executable program elements and determine a pollution source corresponding to at least one event based on the pollution map  121  and the event timeline  123 , etc. stored in the memory  120 . The processor  130  may operate as in the embodiments of  FIG. 3  and  FIG. 4A, 4B  and  FIG. 4C  described above through the pollution source determination module  133 . 
     The moving path setting module  134  may include various processing circuitry and/or executable program elements and set a moving path of the driver  110 . The moving path setting module  134  may set a moving path based on the current location of the robot cleaner  100  and the location of the pollution source corresponding to the event occurred. 
     The camera  140  may include a component for acquiring one or more images regarding the surroundings of the robot cleaner  100 . The camera  140  may include an RGB camera  121 . 
     The camera  140  may include sensors such as, for example, and without limitation, a charge-coupled device (CCD), a complementary metal-oxide semiconductor (CMOS), etc., but the disclosure is not limited thereto. In case the camera  140  includes a CCD, the CCD may be implemented as a red/green/blue (RGB) CCD, an infrared (IR) CCD, etc. 
     The processor  130  may input an image acquired through the camera  140  into the second artificial intelligence model  126  and identify at least one object. 
     The sensor  150  may include a component for acquiring information on the surroundings of the robot cleaner  100 . 
     The sensor  150  may include various sensors, such as, for example, and without limitation, a LIDAR sensor  151 , an ultrasonic sensor  152 , a 3D sensor  153 , an acceleration sensor  154 , etc. 
     The 3D sensor  153  may, for example, be implemented as a depth camera. The depth camera may be implemented as a TOF camera including a time of flight (TOF) sensor and an infrared light. The depth camera may measure depth using disparity of images acquired using a plurality of cameras, and in this case, it may include an IR stereo sensor. Alternatively, the depth camera may be implemented in a structured light method of measuring depth by photographing a light pattern projected by a projector with a camera. 
     The processor  130  may generate/update a map using various sensing data received through the sensor  110  or generate/update information on locations of one or more objects or pollution sources on a map. 
     The processor  130  may determine the locations of pollution sources and the robot cleaner  100  on the map based on the various sensing data received through the sensor  110  and set a moving path. 
     The pollution sensor  160  may include a component for measuring the degree of pollution of the location wherein the robot cleaner  100  is located or the surroundings of the robot cleaner  100 . The processor  130  may generate/update the pollution map  121  for each time using the pollution sensor  160 . 
     As an example, the pollution sensor  160  may be implemented as, for example, and without limitation, a light sensor that receives light from the outside of the robot cleaner  100 . In this case, whenever the robot cleaner  100  is located on each point on the map, the pollution map module  131  may detect the amount of foreign substances existing in the front side or the surroundings of the robot cleaner  100  based on the sensing data received through the light sensor before the foreign substances were introduced into the robot cleaner  100  and determine the degree of pollution of each point. The pollution map module  131  may generate/update the pollution map  121  through the determined degree of pollution. 
     As an example, the pollution sensor  160  may be implemented as a light sensor provided on the introduction path of foreign substances inside the robot cleaner  100 . The light sensor may include light emitting elements and light receiving elements for receiving light that were emitted from the light emitting elements and passed through the introduction path. In this case, whenever the robot cleaner  100  is located on each point on the map, the pollution map module  131  may detect the amount of foreign substances introduced through the light sensor and identify the degree of pollution of each point. The pollution map module  131  may generate/update the pollution map  121  through the identified degree of pollution. 
     As an example, the pollution sensor  160  may be implemented as a light sensor for detecting the amount of foreign substances of the place wherein foreign substances introduced into the robot cleaner  100  are accumulated. The light sensor may include light emitting elements and light receiving elements for receiving light that were emitted from the light emitting elements and passed through the place. In this case, whenever the robot cleaner  100  is located on each point on the map, the pollution map module  131  may identify the speed at which foreign substances are accumulated through the sensing data of the light sensor and identify the degree of pollution of each point. The pollution map module  131  may generate/update the pollution map  121  through the identified degree of pollution. 
     As an example, the pollution sensor  160  may, for example, and without limitation, be implemented as a piezoelectric sensor or an acceleration sensor, etc. attached to a filter wherein foreign substances introduced into the robot cleaner  100  are filtered. In this case, whenever the robot cleaner  100  is located on each point on the map, the pollution map module  131  may identify the amount of suctioned foreign substances using the sensing data of the piezoelectric sensor or the acceleration sensor. The pollution map module  131  may generate/update the pollution map  121  by determining the degree of pollution of each point through the identified amount of foreign substances. 
     With respect to the pollution sensor  160 , various conventional technologies for determining the degree of pollution may be used in addition to the aforementioned examples. 
     The communicator  170  may include various communication circuitry for the robot cleaner  100  to perform communication with at least one external device and transmit and receive signals/data. For this, the communicator  150  may include circuitry. 
     The communicator  170  may include, for example, and without limitation, a wireless communication module, a wired communication module, etc. 
     The wireless communication module may include, for example, and without limitation, at least one of a WIFI communication module, a Bluetooth module, an infrared data association (IrDA) module, a third generation (3G) mobile communication module, a fourth generation (4G) mobile communication module, a fourth generation long term evolution (LTE) communication module, or a fifth generation (5G) mobile communication module for receiving contents from an external server or an external device. 
     The wired communication module may, for example, and without limitation, be implemented as a wired port such as a thunderbolt port, a USB port, etc. 
     Although not illustrated in  FIG. 9 , in the robot cleaner  100 , various components such as a user inputter (e.g., including various input circuitry) for receiving instructions/information from a user, a display/a speaker, etc. for outputting information visually/acoustically may be additionally included. The user inputter may be implemented as a microphone, a touch screen, a button, a motion sensor, etc., but is not limited thereto. 
     A method for operating a robot cleaner according to the disclosure will be described in greater detail below with reference to  FIG. 10  to  FIG. 11 . 
       FIG. 10  is a flowchart illustrating an example method for operating a robot cleaner according to various embodiments. 
     Referring to  FIG. 10 , in an example operating method according to the disclosure, a pollution source may be identified at operation S 1010 . 
     For example, a pollution source among a plurality of objects may be identified based on information on the locations of the plurality of objects and a pollution map. 
     The pollution map may include information on the degree of pollution for each location on the map corresponding to a place wherein the robot cleaner is located. Also, the information on the locations of the plurality of objects may include information on the locations of the plurality of objects on the map. 
     In the example operating method according to the disclosure, when a predetermined event occurs, a pollution source corresponding to the event among the plurality of objects may be identified based on the information on the locations of the plurality of objects and the pollution map. A predetermined event may include an event which becomes a factor for increasing the degree of pollution of the place wherein the robot cleaner is located. 
     The pollution map used for identifying a pollution source may be a pollution map related to the time point when the event occurred. 
     As an example, in case the first artificial intelligence model trained to determine pollution sources is stored in the memory of the robot cleaner, the information on the locations of the plurality of objects and the pollution map related to the time point when the event occurred may be input into the first artificial intelligence model and a pollution source corresponding to the event may be determined. 
     As an example, based on the pollution map, a location on the map wherein the degree of pollution increased by greater than or equal to a threshold value after the time point when the event occurred may be determined. 
     In this case, based on the information on the locations of the plurality of objects, the processor  130  may identify an object existing in the determined location, and determine the identified object as a pollution source. 
     In case the second artificial intelligence model trained to identify objects is stored in the memory of the robot cleaner, an image acquired in the determined location may be input into the second artificial intelligence model and at least one object may be identified. At least one of the identified objects may be determined as a pollution source corresponding to the identified event. 
     The mapping information (e.g., event-pollution source mapping information) may be updated such that the identified (determined) pollution source is mapped to the event. 
     In this case, if the event occurs again, a pollution source corresponding (mapped) to the event may be identified based on the mapping information. 
     In the example operating method according to the disclosure, the robot cleaner may move based on the location of the identified pollution source at operation S 1020 . The robot cleaner may perform cleaning while moving based on the location of the identified pollution source within a predetermined time period after the pollution source was identified. 
     In case the event occurred again later, the robot cleaner may perform cleaning while moving based on the location of the pollution source. 
     For example, the driver  110  may be controlled such that the robot cleaner  100  moves to at least some areas within a predetermined range from the location of the identified pollution source on the map from the current location of the robot cleaner  100  on the map. 
     In case the identified pollution source is a movable object, the robot cleaner may move based on the location to which the identified pollution source moves on the map. 
     In case the second artificial intelligence model trained to identify objects is stored in the memory of the robot cleaner, a map may be generated based on sensing data acquired through the sensor. 
     In this case, objects may be identified by inputting an image acquired through the camera into the second artificial intelligence model, and information on the locations of the plurality of objects may be generated based on the sensing data for the identified objects acquired from the sensor. The information on the locations may be information on the locations on the map. 
       FIG. 11  is a flowchart illustrating an example operating method according to various embodiments. 
     Referring to  FIG. 11 , in case an event occurs at operation S 1110 , it may be identified whether there is a pollution source mapped to the event in the event-pollution source mapping information stored in the robot cleaner or a communicable external device in advance at operation S 1120 . 
     In case there is a pollution source mapped to the event in the event-pollution source mapping information at operation S 1120 —Y, it may be identified whether information on the location of the pollution source is stored in advance at operation S 1130 . 
     In case information on the location of the pollution source is stored in advance at operation S 1130 —Y, the robot cleaner may perform cleaning such as suctioning, etc. while moving based on the location of the pollution source at operation S 1140 . If it is identified that the pollution source does not currently exist in the location through the sensor and/or the camera, the changed location of the pollution source may be searched through the sensor and/or the camera. 
     In case there is no pollution source mapped to the event in the event-pollution source mapping information at operation S 1120 —N, a pollution source may be determined based on a pollution map related to the time point when the event occurred at operation S 1150 . For example, a location on the map wherein the degree of pollution increased relatively greatly as the event occurred may be identified through pollution maps for each time during the time section including the time point when the event occurred, and a pollution source existing in the location may be identified. 
     In this case, the event-pollution source mapping information may be updated based on information on the determined pollution source, and information on the location of the pollution source may be stored at operation S 1160 . 
     In case there is information on a pollution source mapped to the event in the event-pollution source mapping information at operation S 1120 —Y, but there is no information on the location of the pollution source at operation S 1130 —N, it may be identified whether the pollution source exists in a place on the map, and if the pollution source exists in a place on the map, where the location is, etc. using the sensor and the camera at operation S 1170 . 
     In case the pollution source exists in the place at operation S 1180 —Y, information on the location of the pollution source may be stored at operation S 1190 , and the robot cleaner may perform cleaning while moving based on the location of the pollution source at operation S 1140 . 
     In case the pollution source does not exist in the place at operation S 1180 —N, a new pollution source may be identified on the pollution map related to the time point when the event occurred at operation S 1150 . 
     An example embodiment as illustrated in  FIG. 11  is based on the assumption of a case wherein an event that increases the degree of pollution of a place on the map occurred. For example, in case an event occurred is not an event that increases the degree of pollution of a place on the map, the embodiment of  FIG. 11  may not be performed. 
     Information on an event increasing the degree of pollution may be information set by a user or the manufacturer in advance, but it may also be information automatically generated by the operating method according to the disclosure. 
     For example, in the example operating method according to the disclosure, at least one event that increases the degree of pollution of the pollution map by greater than or equal to a threshold value among at least one event may be identified based on information on the time when at least one event occurred during a time section and the pollution map during the time section. Information on the event that increases the degree of pollution may be generated/updated based on the information on the identified event. 
     In case an event that increases the degree of pollution is identified, a pollution source corresponding to the identified event among the plurality of objects may be identified based on information on the locations of the plurality of objects and the pollution map related to the time point when the identified event occurred. 
     The event-pollution source mapping information may be updated such that the identified pollution source is mapped to the identified event. Then, in case the event occurs again later, the pollution source mapped to the event may be identified based on the event-pollution source mapping information, and a moving path may be set based on the location of the pollution source. 
     The example operating method illustrated and described with reference to  FIG. 10  and  FIG. 11  above may be performed through the robot cleaner  100  illustrated and described with reference to  FIG. 2  and  FIG. 9 . The operating method illustrated and described with reference to  FIG. 10  and  FIG. 11  may be performed through a system including the robot cleaner  100  and one or more external devices. 
     The robot cleaner according to the disclosure has an effect that it can automatically determine a pollution source that increases the degree of pollution of the place wherein the robot cleaner is operated as each event occurs. 
     The robot cleaner according to the disclosure has an effect that it can construct mapping information on pollution sources for each event, and set an optimal moving path for each of various events based on the information. 
     In addition, the robot cleaner according to the disclosure can automatically update mapping information and information on the locations of objects even when the locations of objects in a place are changed or a place itself is changed, and set an optimal moving path. 
     The various example embodiments of the disclosure described above may be implemented in a non-transitory recording medium that is readable by a computer or a device similar thereto, using software, hardware or a combination thereof. 
     According to implementation by hardware, the embodiments described in the disclosure may be implemented using, for example, and without limitation, at least one of application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, micro-controllers, microprocessors, an electronic unit for performing various functions, or the like. 
     In some cases, the embodiments described in this disclosure may be implemented as a processor itself. According to implementation by software, the embodiments such as processes and functions described in this specification may be implemented by separate software modules. Each of the aforementioned software modules can perform one or more functions and operations described in this specification. 
     Computer instructions for executing the processing operations at the robot cleaner  100  according to the various embodiments of the disclosure described above may be stored in a non-transitory computer-readable medium. Such computer instructions stored in a non-transitory computer-readable medium may make the processing operations at the robot cleaner  100  according to the various embodiments described above performed by a specific device, when they are executed by the processor of the specific machine. 
     A non-transitory computer-readable medium may refer, for example, to a medium that stores data semi-permanently, and is readable by machines. As specific examples of a non-transitory computer-readable medium, there may be a CD, a DVD, a hard disc, a blue-ray disc, a USB, a memory card, a ROM and the like. 
     While the disclosure has been illustrated and described with reference to various example embodiments, it will be understood that the various example embodiments are intended to be illustrative, not limiting. It will be further understood by one of ordinary skill in the art that various changes in form and detail may be made without departing from the true spirit and full scope of the disclosure, including the appended claims and their equivalents.