KR101847703B1

KR101847703B1 - Automatic feed water apparatus

Info

Publication number: KR101847703B1
Application number: KR1020160027690A
Authority: KR
Inventors: 성철모; 신용민; 조일수
Original assignee: 엘지전자 주식회사
Priority date: 2016-03-08
Filing date: 2016-03-08
Publication date: 2018-04-10
Also published as: KR20170104811A

Abstract

The water automatic drainage device according to the embodiment of the present invention calculates the height of the container using the captured image while the water is taken out by the water discharge part and is filled in the container based on the information obtained through the ultrasonic sensor And the water discharge portion is blocked when the measured water level reaches the reference water level according to the height of the container.

Description

Automatic feed water apparatus

The present invention relates to a water automatic watering device.

Generally, a water supply device is a device for purifying raw water such as tap water to be suitable for drinking. Recently, an automatic water supply device having a function of controlling the water flow rate by measuring the height of a container for containing water taken out from the water supply device has been developed.

Prior art 10-2013-0102444 discloses a water purifier with an automatic extraction device.

However, the water purifier disclosed in the prior art has the following problems.

First, there is a disadvantage that it is difficult to provide water as much as the user desires because the amount of water to be dispensed from the water purifier varies depending on the thickness or type of container for storing the water.

Second, in the case of a container having a small entrance, it is difficult to predict the shape of the inside of the container by using an ultrasonic sensor having a large directivity angle, and thus it is impossible to take out the predetermined amount of water.

The present invention has been proposed to overcome the problems of the prior art presented above.

According to an aspect of the present invention, there is provided a water automatic drainage device including a main body having a water discharge portion for discharging water, An ultrasonic sensor provided in the main body corresponding to the upper part of the container for emitting ultrasonic waves toward the water filled in the container and receiving ultrasonic waves reflected from the surface of the water; And a controller for controlling the amount of water taken out by controlling the water discharge unit.

The control unit calculates the height of the container using the captured image while the water is taken out by the water discharging unit, measures the water level of the water filled in the container based on the information obtained through the ultrasonic sensor, When the water level of the water reaches the reference water level according to the height of the container, the water discharge part can be blocked.

The automatic water supply device according to the embodiment of the present invention configured as described above has the following effects.

First, there is an advantage that the user can supply as much water as desired regardless of the thickness or kind of the container.

Second, since the thickness or shape of the container can be predicted even in a container having a small inlet, there is an advantage in that the predetermined amount of water can be taken out.

Thirdly, when a predetermined amount of water is taken out from the water automatic drainage device, an alarm is generated to inform the user that the water drainage is completed, thereby improving the usability.

1 is a perspective view of an automatic water supply device according to an embodiment of the present invention;
FIG. 2 is a schematic view of a water automatic watering device for showing a method of operating a camera module according to an embodiment of the present invention; FIG.
3 is a schematic diagram of a water automatic watering device for showing an operation method of an ultrasonic sensor according to an embodiment of the present invention.
4 is a flowchart of a method of operating an automatic water supply device according to a first embodiment of the present invention.
5 is a flow chart for the detailed operation of step S3 of FIG. 4;
6 is a flowchart of a method of operating an automatic water supply device according to a second embodiment of the present invention.
7 and 8 are graphs showing the water level according to the ultrasonic value sensed by the ultrasonic sensor of the present invention.
9 is a view showing a refrigerator to which an automatic water supply device according to an embodiment of the present invention is applied.

Hereinafter, a water automatic watering device according to an embodiment of the present invention will be described in detail with reference to the drawings.

It is noted that the automatic water supply device described below can be applied to all household appliances that can take out or handle water such as a refrigerator.

1 is a perspective view of an automatic water supply device according to an embodiment of the present invention.

Referring to FIG. 1, the water automatic drainage device 1 according to the present embodiment includes a main body 10 that forms an outer appearance.

The main body 10 may include a front panel 11 forming a front surface.

The front panel 11 includes a first front panel 12 disposed on the front side of the main body 10, a second front panel 13 disposed on the lower front side of the main body 10, And a connection portion 14 connecting the front panel 12 and the second front panel 13.

The front panel 11 may have a generally stepped shape. That is, the first front panel 12 is protruded forward from the front surface of the main body 10, and the second front panel 13 is recessed from the front surface of the main body 10 .

In detail, the first front panel 12 may include a first user interface unit 121 and a second user interface unit 122.

The first user interface unit 121 may input a command related to water or may output information related to water. The second user interface unit 122 may input a command related to ice or may output information related to ice.

The connection portion 14 may be formed with an ice discharge portion 142 through which ice generated in the automatic water feeder 1 is discharged and a water discharge portion 141 through which water is discharged.

An ice channel may be formed in the ice discharge unit 142, and a water channel may be formed in the water discharge unit 141.

The second front panel 13 may form a container receiving space 131 in which a container for containing ice or water taken out from the ice discharge unit 142 or the water discharge unit 141 is accommodated. Accordingly, the user can place the container in the container accommodating space 131 to contain the ice or water falling from the ice discharger 142 or the water discharger 141.

In addition, a pedestal 15 may be formed under the second front panel 13.

The pedestal 15 may be positioned below the ice discharge port 142 and the water discharge unit 141. The pedestal 15 supports the container so that the container is stably placed in the container accommodating space 131. Therefore, the ice or water discharged from the ice discharge unit 142 or the water discharge unit 141 can be stably dropped into the container.

However, the connection unit 14 may be provided with the ultrasonic sensor 30 of FIG. 2 according to the present invention to be described later.

The ultrasonic sensor is a device capable of emitting and receiving ultrasonic waves to a container placed on the pedestal 15. In the present embodiment, the ultrasonic sensor can emit ultrasonic waves toward the water to be filled in the container, and receive ultrasonic waves reflected from the surface of the water. Therefore, by using the ultrasonic sensor, it is possible to measure the degree of water filled in the container, that is, the level of the water filled in the container. In order to accurately measure the level of the water to be filled in the container, the ultrasonic sensor can be positioned vertically above the container placed on the pedestal 15.

Also, although not shown, a camera module (20 of FIG. 2) of the present invention to be described later may be installed at any point of the second front panel 13.

The camera module is a device for capturing an image of a container placed on the pedestal 15. In this embodiment, the camera module is capable of capturing a side view of the container when the container is placed on the pedestal 15. In order to accurately capture the side image of the container, the camera module may be located at any point on the second front panel 13 so as to view the side of the container resting on the pedestal 15. An image captured by the camera module may be provided to a control unit (40 of FIG. 2) to be described later.

The controller may control the operation of the ultrasonic sensor and the camera module, and may adjust the amount of water taken out of the water discharge unit 141. Details of the ultrasonic sensor, the camera module, and the control unit will be described later.

The automatic water feeder 1 may further include a filter unit for purifying water and a water tank for storing the purified water in the filter unit. The automatic water feeder 1 may further include at least one of a compressor for compressing the refrigerant, a cold water tank for storing cold water, and a hot water tank for storing hot water.

Hereinafter, a camera module, an ultrasonic sensor, and a control unit according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a schematic view of a water automatic watering device for showing an operation method of a camera module according to an embodiment of the present invention, FIG. 3 is a schematic view of a water automatic watering device for showing an operation method of an ultrasonic sensor according to an embodiment of the present invention, Fig.

2 and 3, the automatic water dispenser 1 according to the present embodiment includes a container accommodating space 131 in which the container 50 in which the water taken out from the automatic water feeder 1 is collected, (Not shown).

In detail, the main body 10 includes a camera module 20 for capturing an image of the container 50 placed on the pedestal 15, and a camera module 20 for emitting ultrasound waves toward the water filled in the container 50, An ultrasonic sensor 30 for receiving the reflected ultrasound waves and a controller for controlling the water discharge amount of the water discharge unit 141 based on the image captured by the camera module 20 and the information obtained from the ultrasonic sensor 30 And may include a control unit 40.

In detail, the camera module 20 may be installed at any point of the second front panel 13 to capture a side image of the container 50 placed on the pedestal 15.

For example, the container 50 includes an open inlet 51, a side portion 53 defining a height h of the container 50, and a bottom portion 52 forming the bottom of the container 50 ). The camera module 20 is installed at a position where the side portion 53 of the container 50 of the second front panel 13 can be properly photographed so as to accurately acquire the side image of the container 50 .

In another embodiment, the camera module 20 may be installed at a point away from the main body 10. In this case, the camera module 20 may include a communication unit to communicate with the control unit 40, and may capture a side image of the container 50 in response to a command from the control unit 40. That is, the position of the camera module 20 is not limited.

Meanwhile, since the camera module 20 is located at a relatively short distance from the container 50, the angle of view is small, so that the side image of the container 50 may not be completely visible. In order to prevent the problem that the angle of view is small, the camera module 20 may include a wide-angle lens having a short focal length. Therefore, even if the camera module 20 is positioned close to the container 50, all the side images of the container 50 can be captured. An image captured by the camera module 20 may be provided to the controller 40.

The ultrasonic sensor 30 is a known device capable of transmitting and receiving ultrasonic waves.

In detail, the ultrasonic sensor 30 can emit a narrow-angle ultrasonic wave into the container 50 placed on the pedestal 15 and receive ultrasonic waves reflected from the inside of the container 50. The ultrasonic sensor 30 may emit ultrasonic waves to the surface of the water filled in the container 50. When the water is discharged from the surface of the water, It is possible to receive reflected ultrasonic waves.

The ultrasonic sensor 30 can measure the water level of the water filled in the container 50 by comparing the time of emitting the ultrasonic waves and the time of receiving the ultrasonic waves reflected from the surface of the water in real time. Therefore, as the amount of water in the container 50 gradually increases, the difference between the time at which ultrasonic waves are emitted and the time at which ultrasonic waves are received can be reduced.

The ultrasonic sensor 30 may be positioned above the container 50 placed on the pedestal 15 in order to accurately measure the level of the water filled in the container 50. [ For example, the ultrasonic sensor 30 may be positioned vertically above the container 50, and may be disposed adjacent to the water discharge unit 141 from which the water exits.

The ultrasonic wave information acquired by the ultrasonic sensor 30 (e.g., ultrasonic wave transmission time, ultrasonic wave reception time, etc.) may be provided to the controller 40.

The control unit 40 may control the operation of the water discharge unit 141 based on the image captured by the camera module 20 and the information obtained from the ultrasonic sensor 30. [

The control unit 40 calculates the height h of the container 50 using the image captured by the camera module 20 and controls the height of the container 50 using the information obtained from the ultrasonic sensor 30. [ It is possible to measure the water level of the water filled in the water tank 50.

Therefore, the control unit 40 can adjust the amount of water to be supplied from the water discharge unit 141 according to the height h of the container 50 and the measured water level.

A method of calculating the height h of the container 50 using the image captured by the camera module 20 and a method of calculating the height h of the container 50 using the information obtained from the ultrasonic sensor 30, The method of measuring the water level is described in detail below.

The automatic water feeder 1 may further include a sensor for detecting whether the container 50 is correctly positioned in the container accommodating space 131. [ The reason why the detection sensor is necessary is that the side image of the container 50 is not accurately captured by the camera module 20 if the container 50 is not accurately positioned in the container accommodating space 131 , The water level of the water filled in the container 50 can not be accurately measured by the ultrasonic sensor 30.

The sensing sensor may be a sensor for determining whether the container 50 is positioned at a predetermined position of the pedestal 15, and may be a proximity sensor using infrared rays or the like.

When the container 50 is not positioned at the predetermined position of the pedestal 15, the controller 40 may generate an alarm to guide the user to position the container 50 at a predetermined position.

Hereinafter, a method of operating the camera module and the ultrasonic sensor of the present invention will be described in detail.

4 is a flowchart illustrating an operation method of the automatic water supply device according to the first embodiment of the present invention.

4, the control unit 40 of the automatic water feeder 1 can control the operation of the water discharge unit 141 using the camera module 20 and the laser sensor 30 .

In detail, in step S1, the control unit 40 opens the water discharge unit 141 to control the water discharge unit 141 to discharge water.

For example, the control unit 40 determines whether the container 50 is correctly positioned in the container accommodating space 131 through the detection sensor. If it is determined that the container 50 is accurately located at a predetermined position in the container accommodating space 131, the controller 40 may open the water discharging portion 141 to allow water to be taken out.

In step S2, the control unit 40 operates the camera module 20 to capture a side image of the container 50. [ The camera module 20 captures a side image (side image) of the container 50 and provides the captured image to the control unit 40.

Thereafter, in step S3, the controller 40 calculates the height of the container 50 using the captured image provided from the camera module 20.

A method of calculating the height of the container 50 using the captured image will be described in detail with reference to FIG.

Figure 5 is a flow chart for the detailed operation of step S3 of Figure 4 of the present invention.

Referring to FIG. 5, in step S31, the controller 40 generates a differencing image using the captured image. That is, the control unit 40 may generate a difference image by comparing the captured image of the container 50 with a previously stored image that does not include the container 50. For example, the difference image may be generated by subtracting the absolute value of each pixel of the image in which the container 50 is absent from the absolute value of each pixel of the captured image of the container 50.

Thereafter, in step S32, the controller 40 performs image binarization on the difference image to set an object area of interest. The image binarization may refer to a process of assigning a region having a pixel having a threshold value or more to a white region and a region having a pixel having a threshold value or less to a black region with respect to the difference image. For example, the control unit 40 may set a white region as an object region of interest in the state where the image binarization is performed. This process can be understood as a process for extracting the appearance of the container 50 from the difference image.

Thereafter, in step S33, the controller 40 may perform a graph-cut algorithm on the region of interest to extract the boundary region of the container. The graph-cut algorithm means an iterative graph cut technique for dividing an image into objects and background regions. Since the graph cut algorithm is a known technique, a detailed description thereof will be omitted.

Thereafter, in step S34, the controller calculates the height of the container 50 using the coordinate values of the boundary area.

In detail, the control unit 40 includes a database in which three-dimensional coordinates of each point of the captured image are stored. In the database, coordinate values according to the distance between the camera module 20 and each point of the captured image may be stored.

The control unit 40 may assign three-dimensional coordinate values (x, y, z) to all the selected points along the boundary region of the container 50 of the captured image. Here, "x" may be a coordinate value for the horizontal axis, "y" may be a coordinate value for the vertical axis, and "z"

Accordingly, the controller 40 determines the height h of the container 50 through the z-axis coordinate value of the inlet 51 of the container, which means the height h of the container 50 Can be calculated. The diameter of the inlet portion 51 of the container can be calculated through the x-axis coordinate value of the inlet portion 51 of the container, which means the diameter of the inlet portion 51 of the container.

The controller 40 can estimate the diameter of the bottom 52 of the container, the thickness of the container 50, or the shape of the container 50 by the above-described method.

Referring again to FIG. 4, in step S4, the controller 40 operates the ultrasonic sensor 30 to emit ultrasonic waves toward the water filled in the container 50, and ultrasonic waves reflected from the surface of the water .

In step S5, the controller 40 measures the level of the water to be filled in the container 50 based on the information obtained through the ultrasonic sensor 30.

At this time, the control unit 40 can measure the water level of the water filled in the container 50 by comparing the time of emitting the ultrasonic waves from the ultrasonic sensor 30 and the time of receiving the ultrasonic waves in real time. That is, as the amount of water in the vessel 50 gradually increases, the difference between the time at which the ultrasonic waves are emitted and the time at which the ultrasonic waves are received can be reduced.

Thereafter, in step S6, the controller 40 determines whether the measured water level reaches a reference water level according to the height of the vessel 50. [ For example, there may be a reference water level according to the calculated height of the container, and when step S6 is performed, a reference water level according to the calculated height of the container may be set.

In step S7, if it is determined that the measured water level reaches the reference water level according to the height of the container 50, the controller 40 may block the water discharge unit 141. [ For example, if it is assumed that the reference water level is about 80% of the height of the container 50, the controller 40 determines that the water level of the measured water is about 80 , The valve of the water discharge unit 141 is opened until the reference water level reaches the reference water level, and the valve of the water discharge unit 141 is shut off when the reference water level is reached.

If the measured water level does not reach the reference water level according to the height of the container 50 in step S6, the control unit 40 returns to step S4 to determine whether the water level obtained from the ultrasonic sensor 30 The water level of the water filled in the container 50 can be continuously measured.

In the present embodiment, the image of the container is captured using the camera module and the height of the container is calculated using the captured image. However, the present invention is not limited to this, .

For example, another ultrasonic sensor (not shown) other than the ultrasonic sensor 30 for measuring the water level of the water described above may be installed. In this case, the ultrasonic sensor causes ultrasonic waves to be emitted toward the side surface (side surface portion) of the container 50 when the container 50 is placed on the pedestal 15. The height of the container 50 may be calculated using the difference between the time of emitting the ultrasonic waves reflected from the side surface of the container 50 and the time of receiving the ultrasonic waves.

That is, in another embodiment, the height of the container can be calculated using one ultrasonic sensor without using a camera module, and the water level of the water filled in the container can be measured using the other ultrasonic sensor.

Hereinafter, a method of detecting the presence of ice in a container using the ultrasonic sensor of the present invention and reducing the amount of water discharged from the water discharge portion when ice is present will be described in detail with reference to the drawings.

6 is a flowchart of a method of operating the automatic water supply device according to the second embodiment of the present invention.

Referring to FIG. 6, the control unit 40 of the automatic water feeder 1 may control the operation of the water discharge unit 141 using the laser sensor 30.

In detail, in step S11, the control unit 40 opens the water discharge unit 141 to control the water discharge unit 141 to discharge water.

The control unit 40 determines whether the container 50 is accurately positioned in the container accommodating space 131 through the detection sensor and determines whether the container 50 is positioned in the container accommodating space 131 When it is determined that the water is accurately positioned at the predetermined position, the water discharge portion 141 may be opened to allow water to be taken out.

In step S12, the control unit 40 operates the ultrasonic sensor 30 to emit ultrasonic waves toward the water filled in the container 50, and receive ultrasonic waves reflected from the surface of the water.

In step S13, the controller 40 measures the water level of the water filled in the container 50 based on the information obtained through the ultrasonic sensor 30.

The control unit 40 may measure the water level of the water filled in the container 50 by comparing the time of emitting the ultrasonic waves from the ultrasonic sensor 30 and the time of receiving the ultrasonic waves in real time. That is, as the amount of water in the vessel 50 gradually increases, the difference between the time at which the ultrasonic waves are emitted and the time at which the ultrasonic waves are received can be reduced.

At this time, the controller 40 can determine whether foreign substances (e.g., ice, etc.) are detected in the container in step S14.

In detail, the control unit 40 can determine whether the ultrasonic value is dispersed based on the information obtained from the ultrasonic sensor 30. The control unit 40 may determine whether foreign substances are present in the container according to whether the ultrasonic value is dispersed.

More specifically, the controller 40 may acquire an ultrasonic wave value indicating the water level using the ultrasonic wave emitted from the ultrasonic sensor 30 and the ultrasonic wave received time.

For example, if there is no foreign matter (e.g., ice) in the container, the ultrasonic value indicating the water level may be expressed as shown in FIG.

Referring to FIG. 7, if there is no ice in the container, the ultrasonic wave detected by the ultrasonic sensor 30 may form a graph having a relatively small amplitude.

However, when foreign substances are present in the container, the ultrasonic value may be expressed as shown in FIG.

Referring to FIG. 8, when foreign substances are present in the container, the ultrasonic value detected by the ultrasonic sensor 30 may form a graph having a relatively large amplitude. This is because the ultrasonic wave emitted from the ultrasonic sensor 30 is reflected on the surface of the ice, not on the surface of the water, when ice is present in the container.

Accordingly, the control unit 40 can determine whether foreign substances are detected in the container through the dispersion of the ultrasonic value detected by the ultrasonic sensor 30.

Referring again to FIG. 6, in step S16, when the foreign substance is detected in the container, the control unit 40 can reset the reference level according to the height of the container 50. FIG.

Here, the height of the container 50 is the height of the container 50 obtained using the camera module 20 or the separate ultrasonic sensor described above.

For example, if it is assumed that the reference water level according to the height of the conventional container 50 is about 80% of the height of the container 50, the controller 40 sets the reference water level in the container 50) of about 70% of the height of the height can be reset. That is, when the ice is detected in the container 50, the control unit 40 may lower the reference water level. This is because if the ice is present in the container 50, the ultrasonic sensor 30 can not accurately measure the water level, so that the water in the container 50 may overflow. Therefore, it is possible to reset the reference water level according to the height of the container in order to prevent the water overflow phenomenon in the container (50).

Thereafter, in step S17, the controller 40 determines whether the measured water level has reached the reset reference water level, and when it is determined that the measured water level has reached the reset reference water level, 141 can be shut off.

When the water level of the water filled in the container 50 reaches the level of the reset water, the controller 40 can generate an alarm and notify the user that the water is taken out.

On the other hand, if the foreign object is not detected in the container, the controller 40 may block the water discharging part according to the measured water level and the reference water level according to the height of the container in step S15.

The control unit 40 determines whether the measured water level reaches a reference water level according to the height of the vessel 50. When it is determined that the measured water level reaches the reference water level, Can be shut off.

Hereinafter, a refrigerator to which the automatic water supply device of the present invention is applied will be described in detail with reference to the drawings.

9 is a view showing a refrigerator to which an automatic water supply device according to an embodiment of the present invention is applied.

FIG. 9 shows that the automatic watering device of the present invention is applied to a refrigerator by way of example, but the present invention is not limited thereto and the automatic watering device of the present invention can be applied to all home appliances capable of taking out or handling water Leave.

Referring to FIG. 9, the automatic water supply device according to the embodiment of the present invention may be applied to a dispenser 200 provided in the refrigerator 100 for taking out water or ice.

In detail, the refrigerator 100 includes a cabinet 101 forming an outer shape and refrigerator doors 102 and 105 movably connected to the cabinet 101.

A storage room for storing food is formed in the cabinet 101. The storage chamber includes a refrigerating chamber and a freezing chamber located below the refrigerating chamber. In this embodiment, for example, a bottom freeze type refrigerator in which a refrigerating chamber is disposed in an upper portion of a freezing chamber will be described.

The refrigerator doors 102 and 105 include a refrigerating compartment door 102 for opening and closing the refrigerating compartment and a freezing compartment door 105 for opening and closing the freezing compartment.

The refrigerator compartment door 102 includes a first refrigerator compartment door 103 and a second refrigerator compartment door 104 disposed to the left and right and a first freezing compartment door 106 disposed vertically, And a second freezer compartment door 107 are included.

The first and second refrigerating chamber doors 103 and 104 can rotate and the first and second freezing chamber doors 106 and 107 can slide.

Meanwhile, a door of either one of the first and second refrigerating chamber doors 103 and 104 is provided with a dispenser 200 for taking out water or ice. In FIG. 9, the dispenser 200 is shown in the first refrigerator compartment door 103 as an example.

Here, the dispenser 200 is applied to the water automatic water supply system of the present invention described above. That is, the dispenser 200 forms a container receiving space in which a container for containing water taken out from the dispenser 200 is accommodated. A camera module for capturing a side image of the container is installed on a side surface of the container accommodating space, and an ultrasonic sensor for emitting ultrasonic waves is installed in the container above the container accommodating space.

Therefore, when the user places the container in the container accommodating space, the controller of the refrigerator detects the height of the container using a camera module installed in the dispenser, and detects the height of the water filled in the container using the ultrasonic sensor Can be measured. The controller may adjust the amount of water taken out of the dispenser 200 based on the height of the detected container and the measured water level.

Claims

A body having a water discharge portion for discharging water;
A camera module installed at a certain position of the main body and capturing a side image of the container placed in the water discharge part;
An ultrasonic sensor installed in the main body corresponding to the upper part of the vessel for emitting ultrasonic waves toward the water filled in the vessel and receiving ultrasonic waves reflected from the surface of the water; And
And a control unit for controlling the amount of water taken out by controlling the water discharge unit,
Wherein,
Calculating a height of the container using the captured image while water is taken out by the water discharge unit,
Measuring the level of water to be filled in the container based on the information obtained through the ultrasonic sensor,
When the measured water level reaches a reference water level according to the height of the vessel,
Wherein the ultrasonic sensor determines whether foreign matter is detected in the container through the ultrasonic sensor, and sets a reference water level according to the height of the container when the foreign matter is detected.

delete

The method according to claim 1,
Wherein,
Wherein the controller determines whether foreign substances are detected in the container according to the amplitude of the ultrasonic value acquired by the ultrasonic sensor.

The method according to claim 1,
Wherein the step of calculating the height of the container using the captured image comprises:
Generates a differencing image using the captured image,
Performs image binarization on the difference image, sets an object region of interest,
And performing a graph-cut algorithm on the region of interest to extract a boundary region of the container.

5. The method of claim 4,
Wherein,
Dimensional coordinate values for each point of the captured image are stored,
Wherein the height of the container is calculated using coordinate values of the boundary region of the container.

The method according to claim 1,
The main body further defines a container accommodating space in which the container is placed,
Wherein the ultrasonic sensor is installed on the upper side of the container placed in the container accommodating space.

The method according to claim 6,
Further comprising a sensing sensor for sensing whether said container is located in said container receiving space,
Wherein the controller generates an alarm when the container is not located in the container accommodating space.

The method according to claim 1,
Wherein the controller generates an alarm when the measured water level reaches a reference water level according to the height of the vessel.

A body having a water discharge portion for discharging water;
An ultrasonic sensor installed in the main body corresponding to the upper portion of the container placed in the water discharging portion to emit ultrasonic waves toward the water filled in the container and receiving the ultrasonic waves reflected from the surface of the water; And
And a control unit for controlling the amount of water taken out by controlling the water discharge unit,
Wherein,
Wherein the controller determines whether foreign substances are detected in the container according to the amplitude of the ultrasonic value obtained from the ultrasonic sensor.

10. The method of claim 9,
Wherein the control unit reduces the amount of water to be taken out when foreign substances are detected in the container.

10. The method of claim 9,
Wherein the ultrasonic sensor operates while water is being taken out by the water discharge portion.