KR101722262B1 - Control method for air conditioning apparatus - Google Patents

Abstract

A method of controlling an air conditioner according to an embodiment of the present invention includes: registering a user of an air conditioner; Confirming the presence of a user approaching the air conditioner; Identifying who is the approaching user; Selecting an operation condition suitable for the identified user; And driving the air conditioner in a predetermined operation mode.

Description

[0001] The present invention relates to a control method for an air conditioning apparatus,

The present invention relates to a control method of an air conditioner.

Generally, an air conditioner is a household appliance that supplies hot air or cold air to an indoor space by operation of a refrigerant cycle.

In recent years, a large number of portable terminals capable of accessing the Internet as well as a smart phone, downloading a document, a game program, a document file, and the like can be freely executed and a telephone conversation is possible.

In recent years, a home network system capable of controlling the operation of electric appliances including household appliances installed in a home using a portable terminal has been widely used in newly-built apartments or general households.

As described above, remote control can be performed from a remote place without directly operating various home appliances including the air conditioner, and the usability is greatly improved.

It is an object of the present invention to provide a control method of an air conditioner which can remotely control an indoor unit of an air conditioner by using a control panel installed in a smartphone or an air conditioner.

According to an aspect of the present invention, there is provided a method of controlling an air conditioner, including: registering a user of an air conditioner; Confirming the presence of a user approaching the air conditioner; Identifying who is the approaching user; Selecting an operation condition suitable for the identified user; And driving the air conditioner in a predetermined operation mode.

The control method of the air conditioner having the above-described configuration has the following effects.

First, by storing the user information and the operating condition using the indoor unit of the air conditioner, the indoor unit is automatically operated according to the set operating condition when the user approaches the place where the indoor unit is installed, have.

Second, since the user can operate the indoor unit automatically under the designated operating condition without operating the remote controller or the special input device, the user can not operate the indoor unit due to the loss of the remote controller.

Thirdly, every time the user inputs the indoor unit operation condition, the operation conditions are accumulated and the preferred operation mode or the operation condition may be automatically selected for each user, so that the most comfortable indoor environment is provided to the user who operates the indoor unit There are advantages to be able to.

1 is a system diagram schematically illustrating a network system according to an embodiment of the present invention.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a portable terminal and an indoor unit.
3 is a flowchart illustrating a basic procedure for operating an indoor unit in a network system according to an embodiment of the present invention.
4 is a flowchart showing a user registration process for driving an indoor unit according to the first embodiment of the present invention.
5 is a flowchart showing a user registration process for driving an indoor unit according to a second embodiment of the present invention.
FIG. 6 is a flowchart illustrating a user detection method according to a first embodiment of the present invention; FIG.
FIG. 7 is a flowchart illustrating a method for detecting a user according to a second embodiment of the present invention. FIG.
8 is a flowchart illustrating a method of determining a user according to an embodiment of the present invention.
9 is a flow chart illustrating a process of selecting an operation condition according to an embodiment of the present invention.
10 is a flowchart showing a preferred driving mode establishment method according to an embodiment of the present invention.

Hereinafter, a configuration of a network system including an air conditioner according to an embodiment of the present invention, and a method of operating a system, that is, a method of controlling an air conditioner will be described in detail with reference to drawings and flowcharts.

1 is a system diagram schematically illustrating a network system according to an embodiment of the present invention.

1, a network system according to an embodiment of the present invention includes an indoor unit 10 of an air conditioner that supplies cold air or warm air to a room, and a smart phone capable of wireless communication with the indoor unit 10 And a wireless router (1) and / or a wireless router (2) for enabling internet communication with the portable terminal (20) and the indoor unit (10). And may further include a computer connected to the wire / wireless router 1 by wire or wirelessly.

In detail, the portable terminal 20 and the indoor unit 10 may include a communication module for wireless communication. The communication module may include a Bluetooth module, a WiFi module, a ZigBee module, and the like. The indoor unit 10 may be equipped with a camera 12 for photographing the user's face and a voice recorder 11 for recording voice of the user. Of course, the portable terminal 20 may also include a camera and a sound recorder.

The portable terminal 20 is capable of one-to-one communication with the indoor unit 10 through the communication module for wireless communication. Accordingly, the user can input the operation condition through the control panel mounted on the indoor unit 10 or input the operation condition through the portable terminal 20. [ When the operation condition is inputted through the portable terminal 20, the inputted operation condition is transmitted to the indoor unit 10 through the communication module, and the speed or direction of the indoor fan is adjusted according to the transmitted operation condition The angle of the device 13 is set or changed.

2 is a block diagram illustrating a configuration of a portable terminal and an indoor unit capable of mutual wireless communication among network systems according to an embodiment of the present invention.

Referring to FIG. 2, the portable terminal 20 constituting the network system according to the embodiment of the present invention may be a smart phone which has been recently launched.

In detail, the portable terminal 20 includes a controller 200, a key input unit 210 for inputting specific commands and information to the controller 200, and a controller 210 for controlling the state of the portable terminal 20, A voice input unit 230 for inputting voice of the user, a voice output unit 240 for outputting the voice recorded by the user, An angular velocity sensor 260 and an acceleration sensor 270 for sensing the movement of the portable terminal 20 and a communication module 280 for wireless communication with the indoor unit 10. [ A GPS module 290 for confirming the position of the portable terminal 20, and a memory 295 for storing various information and data.

In detail, the key input unit 210 includes an input button or a touch panel included in the portable terminal 20, the photographing unit 250 includes a camera mounted on the portable terminal 20, The input unit 230 includes a sound recorder mounted on the portable terminal 20 and the sound output unit 230 includes a speaker mounted on the portable terminal 20.

The angular velocity sensor 260 includes a gyro sensor or a gravity sensor for sensing the inclination or the rotation angle of the portable terminal 20. The acceleration sensor 270 senses a speed or an acceleration of the portable terminal 20 in a specific direction.

In addition, the communication module 280 includes Bluetooth, Wi-Fi, and ZigBee as described above. The display unit 220 includes a liquid crystal panel included in the portable terminal 20.

The indoor unit 10 includes a control unit 100, a key input unit 110, an audio input unit 130 and an audio output unit 140, a photographing unit 150, a display unit 120, A communication module 180 and a memory 170. Fig. The air conditioner further includes a driving unit 160 for driving the fan 161, the compressor 162 and the wind direction adjusting unit 163 mounted on the indoor unit 10. The driving unit 160 drives the fan 161, The compressor 162 and the motor drive for controlling the amount of electric current supplied to the drive motor for driving the wind direction adjuster 163.

Since the photographing unit 150, the voice input unit 130 and the voice output unit 140, the display module 120 and the communication module 180 are the same as those provided in the portable terminal 20, Duplicate descriptions are omitted.

As shown in the figure, the portable terminal 20 and the indoor unit 10 can independently receive information from the Internet or exchange information with each other through the communication modules 280 and 180 installed in the indoor units. That is, the weather information or the product information of the indoor unit can be downloaded to the Internet through the communication module 280 of the portable terminal 20. The indoor unit 10 may also be connected to the Internet through the communication module 180 to download weather information or product information of the indoor unit to be displayed on the display unit 120. The portable terminal 20 can be connected to the Internet through an access point (Wi-Fi communication) using the wireless router (wireless router) 1 or the wireless router 2 as an intermediary, (10). This is called Infrastructure Networking.

Also, the portable terminal 20 and the indoor unit 10 can perform peer-to-peer communication by using the communication modules 180 and 280. For example, when the communication modules 180 and 1280 are WiFi modules, direct communication can be performed without passing through a wireless router by using a WiFi-Direct technology or an Ad-Hoc mode (or a network) .

In detail, Wi-Fi direct refers to a technology capable of communicating at a high speed using a communication standard such as 802.11a, b, g, or n regardless of the installation of a wireless LAN access point (AP). That is, the portable terminal 20 and the indoor unit 10 can communicate wirelessly without passing through a wireless LAN access point (wireless router or wireless router described above). This technology has recently attracted a great deal of attention as a communication technology for wirelessly connecting the indoor unit 10 and the portable terminal 20 via wireless without an internet network.

Ad hoc mode (or ad hoc network) is a network that is composed of only a mobile host without having a fixed wired network. Since there is no restriction on the movement of the host and no wired network and base station are needed, This is so. That is, even if there is no wireless LAN access point (AP), wireless communication is enabled during the terminal period. Therefore, in the ad-hoc mode, the portable terminal 20 and the indoor unit 10 can communicate wirelessly even without the wireless LAN connection device.

Bluetooth communication is a widely known short range wireless communication method in which a pairing process is performed between a Bluetooth module built in the portable terminal 20 and a Bluetooth module built in the indoor unit 10, This is possible.

Hereinafter, a method of controlling the indoor unit 10 using the portable terminal 20 will be described in detail with reference to flowcharts.

3 is a flowchart illustrating a basic procedure for operating an indoor unit in a network system according to an embodiment of the present invention.

Referring to FIG. 3, the method for controlling the indoor unit 10 of the air conditioner according to the embodiment of the present invention includes a user registration step S10 for registering a user of the indoor unit 10, A step S30 of discriminating who the user is, a step S40 of selecting a driving condition according to the discriminated user, A step S50 of transmitting the condition to the indoor unit 10 and a step S60 of starting the operation of the indoor unit 10 according to the transmitted operating condition.

In detail, when the installation of the indoor unit 10 is completed, the user performs a user registration process through the control panel of the indoor unit 10 or the portable terminal 20. That is, the process of registering as the user of the indoor unit 10 is performed. When the registered user approaches the place where the indoor unit 10 is installed, the user registration process is performed in a designated operation mode operated in the operation condition inputted in the user registration step and a designated operation mode operated in the preferred operation condition of the registered user The preferred operation mode, and the individual operation mode in which the registered user operates the operation conditions that are directly input by voice, so that the indoor unit 10 is automatically operated.

In order to perform such automatic operation, as described above, it is determined whether a user is present at a place where the indoor unit 10 is installed, and a process of determining who the user is is performed. That is, it is determined which one of the users registered in the place where the indoor unit 10 is installed is registered. Thereafter, the control unit 100 of the indoor unit 10 selects an operation condition for the discriminated user, and the operation condition that can be selected is selected from the designated operation mode, the preferred operation mode, There is an input individual operation mode, and one of these modes is selected. Then, the selected operation condition is transmitted to the indoor unit, and the indoor unit is driven according to the transferred operation condition.

Hereinafter, a user registration method, a user existence confirmation method, a user identification method, and a driving condition selection method will be described in detail with reference to flowcharts. The method in which the operating conditions are transmitted to the indoor unit 10 has been described above and will be omitted.

4 is a flowchart showing a user registration process for driving the indoor unit according to the first embodiment of the present invention.

Referring to FIG. 4, a user can register a user using a control panel provided on the front side of the indoor unit 10. The control panel means a module including a button for inputting information or a touch screen and a display unit.

In detail, the user selects a user registration menu through a control panel provided on the front side of the indoor unit 10 (S110). When the user registration menu is activated, the user identification symbol is input (S111). The user identification may be an Arabic numeric number, a user's English or Korean name or a letter, or any of a variety of other methods.

When the input of the user's identification is completed, the camera mounted on the front surface of the indoor unit 10 is turned on (S112), and at the same time, the camera is in the ready state (Standby). When the user presses a touch screen or a button to input a photographing command, the face of the user is photographed (S113). The photographed photograph is stored in the memory 170 connected to the control unit 100 of the indoor unit 10 (S114).

When the photo storage is completed, the recording device provided on the front face of the indoor unit 10 is turned on (S115), and the voice recording ready state is established. Then, the user performs voice recording (S116), and when the recording is completed, the stop button is pressed so that the recorded voice information is stored in the memory 170 (S117). Here, the user voice recording is necessary for user identification, and can be recorded by reading out the user's name or a specific word by voice. If the recorded word is recorded in the indoor unit 10 at a later time, the indoor unit 10 recognizes the word and the user identification process for operating the indoor unit is automatically performed.

On the other hand, when voice recording for user identification is completed, a designated operation condition input step S118 is performed. The designated operation condition input step is a step of inputting a specific operation condition desired by the user registering the information, and inputting the room temperature, the humidity, and the fan air volume by voice. The fan air volume can be input by phonetically setting the air volume stepwise such as strong wind, parallax, The room temperature and the humidity can be inputted by saying, for example, 20 degrees and 50%. Then, the indoor unit 10 records it, performs a voice interpretation algorithm, matches the operation condition corresponding to the interpreted voice, and converts the matched operation condition into an electric signal. Alternatively, the designated operation condition input through the key input unit 110 is also possible.

In detail, when the designated operation condition is input, the input operation condition is stored in the memory 170 (S119). The driving condition information may be stored as a voice command, or may be converted into an electric signal and stored.

5 is a flowchart showing a user registration process for driving an indoor unit according to a second embodiment of the present invention.

Referring to FIG. 5, in this embodiment, a user registration process is performed in the portable terminal 20, and information input through user registration is transmitted to the indoor unit 10 and is stored therein.

In detail, in order to register the user, the user first executes the downloaded indoor unit control application to the portable terminal 20 including the smart phone (S120). Then, the user registration menu is displayed, and the registration menu is selected through touch or button input (S121). In the same manner as described above, steps S122 to S130 for inputting designated operation conditions and storing operation conditions are performed on the screen of the portable terminal 20 from the user identification symbol inputting process.

Specifically, a user identification symbol input through a key input unit 210 including a touch screen or a button input unit, a user's face photographing through a photographing unit 250 including a camera, a voice through a voice input unit 230 including a voice recorder, And the designated operation condition input process is performed step by step through the recording, voice, or key input unit.

More detailed contents of the user identification symbol input step S122 to the driving condition storage step S130 are the same as those described in FIG. 4, except that they are performed only through the screen of the portable terminal 20, The redundant description is omitted for the contents.

Meanwhile, when the operation condition storage (S130) is completed, the stored user registration information is transmitted to the controller 100 of the indoor unit 10 (S131). The transmission method uses wireless transmission using the wireless communication module described above. The user registration information transmitted to the control unit 100 of the indoor unit 10 is stored in the memory 170 of the indoor unit 10 (S132).

When the user information registration process is completed through the steps described above, the preparation for the operation of the indoor unit 10 of the air conditioner is completed. Thereafter, when the user moves to the vicinity of the indoor unit 10, the process of recognizing the user and identifying the user is performed.

FIG. 6 is a flowchart illustrating a method of detecting a user according to the first embodiment of the present invention.

 Referring to FIG. 6, the photographing unit or camera mounted on the front surface of the indoor unit 10 is turned on (S210), and the camera continuously photographs the photographs at predetermined intervals (S211). Then, a silhouette through the image difference comparing method between the previous shot picture (frame 1) and the current shot picture (frame 2) is extracted to detect whether there is motion of the captured object (S212).

Specifically, the image difference comparison method is a method of extracting a moving image of a subject and calculating a difference between the acquired image and extracting a motion of the subject. The method calculates a difference between a previous photograph and a current photograph so as to extract a common area Pixel) is excluded. Then, the acquired image difference frame is analyzed to determine whether the subject moves or moves. Such image difference comparison method is disclosed in detail in Application No. 2004-0017714, Application No. 2005-0078822, and so on, so that a description thereof will be omitted. It is revealed that the gist of the present embodiment is to judge the movement of the subject through comparative analysis of a plurality of photographing information successively photographed by the camera and judge whether there is a user approaching the indoor unit.

On the other hand, if it is determined that there is a user movement using the image difference comparison method (S213), the process goes to a user determination step 30 for determining who the user is. The photographs taken by the camera are used once again in the user identification step. This will be described in detail below.

7 is a flowchart illustrating a method for detecting a user according to a second embodiment of the present invention.

Referring to FIG. 7, the indoor unit 10 is equipped with a sensor for detecting movement of objects on the front of the indoor unit 10, and detects the approach of the user using the sensor.

In detail, the sensing sensor includes an infrared sensor for sensing the movement of the user, and various other sensors are also applicable.

The sensing sensor maintains the on-state at all times (S220), and it is determined whether or not the user is sensed by the sensing sensor (S221). When the user's approach is sensed, the camera mounted on the front of the indoor unit (S222). Then, the body of the user, at least the face of the user, is photographed by the camera by the camera (S223).

In general, when the user approaches the indoor unit with the intention to operate the indoor unit, the eyes are directed toward the indoor unit, so it is not difficult to photograph the user's face. If the face of the user is not exposed to the camera, that is, because the user simply passes through the indoor unit, if the face is not exposed to the camera, the user identification step may not be performed. In other words, in order to prevent the indoor unit from operating when the user simply approaches the front of the indoor unit, the indoor unit may be operated only when the user's face is photographed. In order to block unnecessary power consumption, when the user is willing to drive the indoor unit, it is a prerequisite to perform the task of exposing the face in front of the camera.

Meanwhile, when the face of the user is photographed by the camera, the photographed image information is stored in the memory 170 of the indoor unit 10, and then the process proceeds to the user identification step S30.

FIG. 8 is a flowchart illustrating a method of determining a user according to an embodiment of the present invention.

Referring to FIG. 8, when the presence of the user or access of the user is confirmed, a process of confirming who the user is is performed.

First, the user shooting information obtained in the user checking step and the user shooting information acquired in the user registration step described in FIGS. 6 and 7 are uploaded (S301). In step S302, similarity is determined by comparing and analyzing the photographing information obtained in the user checking step and the user photographing information obtained in the user registration step. Through this process, the similarity between the photographs of the registered users and the photographs obtained at the user confirmation step is calculated numerically.

When the determination of the degree of similarity of the photographs is completed, it is determined whether the user inputs voice (S303). With the voice command, there may be a voice command regarding the indoor unit operation condition, and there may be a voice command for preparing the operation of the indoor unit.

On the other hand, if it is determined that there is no voice command of the user, the control unit of the indoor unit 10 determines who the user is based only on the similarity of the pictures (S308). That is, the registered user having the highest similarity among the similarity values obtained in the similarity determination process is selected, and it is determined that the selected registered user is the person who approached the indoor unit 10. Then, an operation condition selecting step suitable for the selected registered user is performed (S40).

On the other hand, if it is determined that there is a voice command input by the user, all the users' voices acquired in the user registration process are uploaded (S304). Then, the input voice is compared with the voices of the users obtained in the user registration process to determine the voice similarity (S305). Then, the image information similarity is compared with the audio information similarity (S306), and a user having high similarity is selected (S307). And a driving condition selection step S40 suitable for the selected user is performed.

In detail, the largest value among the audio information similarity values and the largest value among the photograph information similarity values are calculated, and the similarity value is compared to select a registered user having a larger similarity value. For example, it is assumed that a person who has a voice information degree of similarity is the highest of the registered users and a person who has the highest degree of similarity of the photograph information is the highest of the registered users and that the voice information degree of similarity is higher than that of the photograph information , And the control unit of the indoor unit (10) determines that the person who approaches the vicinity of the indoor unit (10) is ultimately determined.

FIG. 9 is a flowchart illustrating an operation condition selection process according to an embodiment of the present invention.

In detail, if the actual user is identified through the process of FIG. 8, a process of selecting an operating condition suitable for the identified user is performed. That is, the operation is performed according to the user-input room temperature, the room humidity and the air flow rate, or the operation mode is the designated operation mode stored in the user registration process or the user's preferred operation mode Should be selected.

When the user confirmation and determination process is completed, it is detected by the selected user whether the indoor unit operation condition is inputted by voice (S41). If it is determined that the voice command input for inputting the operation condition is not performed separately, the indoor unit is operated in the designated operation mode inputted in the user registration process (S47).

On the other hand, when a voice command input by the user is detected, the Speech Application Programming Interface (SAPI) is operated (S42) and interprets the inputted voice command (S43). Then, it is determined which voice command is interpreted (S44).

That is, it is determined whether the analysis result is the operation condition (wind direction, wind speed, temperature, humidity, etc.) of the indoor unit 10 directly input by the user or the command for executing the preferred operation mode (S44). If it is determined through the voice analysis that the user directly inputs numerical values for the room temperature, humidity, and air volume, the operating condition corresponding to the analyzed voice command is selected (S48) Humidity, etc.) (S49).

On the other hand, if it is interpreted that the preferred operation command is input by the user, the operation item having a high weight is extracted from the operation conditions inputted by the user (S45), and the indoor unit is operated in the extracted operation mode ). The method of establishing the preferred operation mode will be described in more detail below.

10 is a flowchart showing a preferred driving mode establishment method according to an embodiment of the present invention.

Referring to FIG. 10, the preferred operation mode accumulates the operation conditions input by the user and sets the operation mode having the highest frequency to the preferred operation mode.

In detail, the operating condition is input by the user (441). The operating conditions include room temperature, room humidity and air volume, and input of the operating conditions includes mechanical input through the control panel, input using the portable terminal 20 or voice input.

 The input operation conditions are cumulatively stored in the memory 170 (442). Then, the timer is activated (443) from the moment when the operation of the indoor unit 10 is started under the input operation condition. This is to measure the time taken to change the operation condition from the initial input operation condition. The content of how the user changes the operation condition after a certain time from the initial operation condition is also recognized as a decision factor of one of the preferred operation conditions .

In the process of counting the time by the timer, the controller 100 of the indoor unit 10 detects whether a command for changing the operation condition is inputted by the user (444). When no command for changing the operation condition is inputted, the operation is continued at the first input operation condition and the time is continuously counted by the timer.

On the other hand, when an operation condition change command is input, the time required to change the operation condition and the changed operation conditions are cumulatively stored. At the same time, the timer operation is interrupted and initialized (445). If the operation stop command is not inputted (446), the time counting by the timer is started again, and it is judged whether or not the operation condition change command is re-inputted. When the operation stop command is input, the operation of the indoor unit 10 is terminated.

In addition, a weight is given to an operation condition having the highest selection frequency among the cumulative operation conditions so far. When the preferred operation mode is selected by the user, the operation mode having the highest weight is selected as the preferred operation mode, and the indoor device 10 is controlled to operate in the selected operation mode.

Claims (16)

A user registration step of registering a user with photo and voice and inputting a desired operation condition by a user;
A user presence confirmation step of confirming existence or access of a user;
A user discriminating step of discriminating who the user is from the photo or voice inputted in the user registration step;
Determining whether a voice command for operating the indoor unit is input if the user is identified;
Operating the designated operation mode input in the user registration step based on the inputted picture information if it is determined that the voice command is not separately performed;
Determining whether the voice command is a command for a preferred operation if it is determined that the voice command is input;
Operating in a preferred operation mode if it is determined that a command for the preferred operation has been input; And
And interpreting the voice command and operating in an individual operation mode operated under a corresponding operation condition if it is determined that the command for the preferred operation is input,
In the preferred operation mode,
Wherein weighted values are cumulatively stored for the operation conditions input by the user and the operation times of the respective operation conditions so that the operation conditions having a high weight are selected as the preferred operation conditions. The method according to claim 1,
Wherein the user registration step comprises:
Wherein the air conditioner is operated through a control panel provided in the air conditioner or a portable terminal capable of downloading a program. 3. The method of claim 2,
Wherein the user registration step comprises:
Selecting a user registration menu,
Inputting a user identification symbol on the user registration menu;
A step of acquiring and storing a voice and a picture of the user,
A control method of an air conditioner including a step of inputting and storing a designated operation condition by a user delete 3. The method of claim 2,
User information registered through the control panel of the air conditioner is stored in the air conditioner,
Wherein the user information registered through the portable terminal is wirelessly transmitted to the controller of the air conditioner and stored in the air conditioner. 6. The method of claim 5,
Wherein the wireless communication between the portable terminal and the air conditioner is performed by one of Wi-Fi communication, Bluetooth communication, and Zigbee communication. 6. The method of claim 5,
Wherein the portable terminal and the air conditioner are connected so as to be able to communicate with each other,
Wherein the two-way communication is performed by Wi-Fi direct, ad-hoc mode, and Bluetooth pairing. The method of claim 3,
Wherein the registration of the user information through the portable terminal is started by executing an air conditioner control application installed in the portable terminal. The method according to claim 1,
Wherein the user presence confirmation step comprises:
Detecting a movement of a user by a sensor provided in the air conditioner,
And the detected user is photographed by the photographing unit provided in the air conditioner. The method according to claim 1,
Wherein the user presence confirmation step comprises:
A step of photographing a plurality of times of the air conditioner forward situation continuously by the photographing unit provided in the air conditioner,
And comparing the photographed photographs by an image difference comparison method to determine whether the user is approaching or moving. 11. The method according to claim 9 or 10,
Wherein the user identification step comprises:
And comparing the photographic information photographed in the presence confirmation step of the user with the image information of the photographed photographed in the user registration step,
And a user corresponding to a photograph having the highest degree of similarity is selected as a comparison result. 11. The method according to claim 9 or 10,
Wherein the user identification step comprises:
Comparing the photographic information photographed in the presence confirmation step of the user with image information of photographs photographed in the user registration step to calculate the similarity;
Inputting a voice command of a user;
And comparing the input voice information with voice information recorded in the user registration step to calculate the similarity,
And a user having a larger similarity value among the photo similarity and voice similarity is selected.
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