JP7706393B2 - heating cooker - Google Patents

Description

The present invention relates to a cooking device.

Patent Document 1 discloses an example of a conventional cooking device. This cooking device includes a top plate, a marker, an image capture unit, a marker information extraction unit, and an image capture unit installation status determination unit.

The top plate has a heating section that heats food placed on top. A number of markers are provided on the top surface of the top plate. The photographing section is installed at a position away from the top plate and photographs the top plate. The marker information extraction section extracts marker information contained in the image photographed by the photographing section. The photographing section installation state determination section determines that the installation state of the photographing section is abnormal if the marker information is not contained within a specified range of the image in a specified state.

This cooking device uses the imaging unit to capture images of the top plate and monitor the cooking status of the food being cooked. This cooking device also determines whether the installation status of the imaging unit is abnormal when the imaging unit is installed or while the food is being cooked.

JP 2019-192355 A

When installing the imaging unit, it is necessary to install it so that its position relative to the tabletop and the imaging direction are correct, and to do so, it is necessary to accurately detect the position of the tabletop based on the marker information. In this regard, when detecting these from multiple marker positions in the marker information, it is advantageous for the detection accuracy to be improved if the distance between each marker is wide.

However, in the conventional cooking device described above, the three ring-shaped markers are arranged in the three heating coils that serve as the heating section, and the distance between each marker is relatively narrow. This makes it difficult to accurately detect the position of the top plate from this marker information.

In addition, in the above-mentioned conventional cooking device, three ring-shaped markers are printed on the top plate. Printing markers on the top plate may detract from the design of the top plate, and design restrictions arise regarding the shape and position of the markers.

The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a cooking device that is advantageous in increasing the detection accuracy when detecting the position of the top plate based on marker information when the imaging unit is installed, and that does not impair the design of the top plate when setting the markers, nor does it impose design restrictions on the marker shape and marker position.

The cooking device of the present invention includes a top plate having a heating portion for heating an object to be cooked placed thereon,
A plurality of markers arranged on an outer periphery of the tabletop;
An imaging unit that is installed at a position away from the tabletop and images the tabletop;
a marker information extraction unit that extracts marker information related to the marker included in the image captured by the imaging unit;
an imaging unit installation state determination unit that determines an installation state of the imaging unit based on the marker information;
The marker is characterized in that it is provided integrally with a marker display member that is removably installed on the tabletop.

In the cooking device of the present invention, the markers are arranged on the outer periphery of the top plate, so the distance between the markers is wider than when the markers are arranged in the central region of the top plate. This is advantageous in improving the detection accuracy when the imager installation state determination unit detects, for example, the position of the top plate from the marker information.

The marker is also integrally provided on a marker display member that is removably installed on the tabletop. Therefore, when the marker is not needed, it can be removed from the tabletop together with the marker display member. This means that the marker does not detract from the design of the tabletop, and there are no design restrictions imposed on the marker shape or position.

Therefore, in the cooking device of the present invention, when the position of the top plate is detected based on marker information when the imaging unit is installed, this is advantageous in improving the detection accuracy, and setting the markers does not impair the design of the top plate, and does not impose design restrictions on the marker shape or position.

It is preferable that the imaging unit installation state determination unit determines whether a predetermined number of markers are placed at their respective predetermined setting positions based on the marker information.

For example, if the number of markers in the marker information matches a predetermined number, and each marker position in the marker information matches a predetermined set position, the imaging unit installation state determination unit determines that the predetermined number of markers are placed at the predetermined set positions on the tabletop. In this case, the imaging unit installation state determination unit can determine that the installation state of the imaging unit is normal.

On the other hand, if the imaging unit installation state determination unit determines that the specified number of markers are not placed in the specified set positions, it can determine that the markers are in an abnormal installation state or that the imaging unit is in an abnormal installation state.

It is preferable that the planar shape of a marker placed on a tabletop when viewed from a direction perpendicular to the tabletop is a deformed shape that is deformed from a predetermined normal shape, and that the marker shape in the marker information contained in an image captured by an image capture unit that is correctly installed is a normal shape or an approximately normal shape.

In this case, since the marker shape in the marker information is a regular or approximately regular shape, image analysis is easier than when the marker shape is a deformed shape, which is advantageous in shortening the analysis time.

It is preferable that the upper surface of the marker display member attached to the tabletop is an inclined upper surface that is inclined relative to the tabletop, and that the marker is displayed on the inclined upper surface.

In this case, the marker can be displayed on the inclined upper surface in a regular or approximately regular shape, making it easy to display the marker.

The upper surface of the marker display member attached to the tabletop is a parallel upper surface that is parallel to the tabletop, and the marker is displayed on the parallel upper surface as a deformed shape, and it is preferable that the normal shape is a perfect circle and the deformed shape is an ellipse.

In this case, image analysis is performed to find a perfect circle or an approximately perfect circle, making the analysis easier and helping to shorten the analysis time.

In the cooking device of the present invention, when the position of the top plate is detected based on marker information when the imaging unit is installed, this is advantageous in increasing the detection accuracy, and furthermore, the design of the top plate is not marred when setting the markers, and no design restrictions arise regarding the marker shape or position.

FIG. 1 is a perspective view of a cooking device according to a first embodiment. FIG. 2 is a side view that diagrammatically illustrates a portion of the cooking device of the first embodiment. FIG. 3 is a block diagram of the cooking device according to the first embodiment. FIG. 4 is a schematic diagram of an image of the top plate of the cooking device of the first embodiment taken from directly above. FIG. 5 is a plan view illustrating the planar shape of each marker in the cooking device of the first embodiment. FIG. 6 is a schematic diagram of an image captured from behind the top plate by a camera in a normally installed state in the cooking appliance of the first embodiment. FIG. 7 is a flowchart showing a process of correcting the camera position and the like in the cooking device of the first embodiment. FIG. 8 is a screen display of the notification unit at the start of initial settings of the correction process for the camera position and the like in the cooking appliance of the first embodiment. FIG. 9 is a schematic diagram of a captured image showing an example of an abnormal marker installation state in the cooking appliance of the first embodiment. FIG. 10 is a screen display showing an example of an abnormality notification that notifies the user that the marker is abnormally installed in the cooking appliance of the first embodiment. FIG. 11 is a schematic diagram of a captured image showing an example of an abnormal camera installation state in the cooking appliance of the first embodiment. FIG. 12 is a screen display showing another example of an abnormality notification for notifying that the camera is in an abnormal installation state in the cooking appliance of the first embodiment. FIG. 13 is a side view that illustrates a part of the cooking device according to the second embodiment. FIG. 14 is a schematic diagram of an image of the marker and the marker display member on the front side of the cooking device of the second embodiment, taken from directly above the top plate. FIG. 15 is a schematic diagram of an image of the marker and the marker display member on the far side of the cooking device of the second embodiment, taken from directly above the top plate. FIG. 16 is a schematic diagram of an image of the cooking device of Example 2, in which the markers and marker display members on the front and rear sides are photographed from behind the top plate by a camera in a normally installed state.

Below, examples 1 and 2 of the present invention will be described with reference to the drawings.

Example 1
As shown in FIG. 1, the cooking device 1 of the first embodiment is a built-in gas stove that is integrally built into a cooking counter 5 along a wall 3 of a kitchen.

In this embodiment, the side of the user standing facing the cooking appliance 1 and intending to use the cooking appliance 1 is defined as the near side or front side of the cooking appliance 1, and the side of the wall 3 is defined as the far side or rear side of the cooking appliance 1. The left and right sides of the cooking appliance 1 are defined as the left side of the cooking appliance 1 when the user intending to use the cooking appliance 1 faces the cooking appliance 1.

The cooking device 1 includes a stove body 7, a top plate 9, a camera module 11, and four markers 13a to 13d.

The cooking appliance 1 is a so-called three-burner stove. The top plate 9 covers the top surface of the stove body 7. On the top plate 9, three stove burners 15a, 15b, and 15c are arranged at the vertices of an isosceles triangle. That is, stove burner 15a is arranged at the left front position of the top plate 9, stove burner 15b is arranged at the right front position of the top plate 9, and stove burner 15c is arranged at the center rear position of the top plate 9. Stove burner 15c is located at the center of the left-right width of the top plate 9. These stove burners 15a to 15c are heating units that heat the food F placed above them by burning fuel gas.

A grill 17 is provided inside the stove body 7, and an operating section 19 is provided on the front of the stove body 7 for controlling the heat of each stove burner 15a to 15c and the grill 17.

A notification unit 21 consisting of a liquid crystal display device is provided at the center of the front side of the tabletop 9. The notification unit 21 receives a signal from a first communication control unit 27 of a first control device 23 (described later) and displays information such as the result of a judgment made by a camera installation state judgment unit 33 of a second control device 31 (described later).

Four marker display members 130a, 130b, 130c, and 130d are arranged on the outer periphery of the tabletop 9. Each of the marker display members 130a to 130d is arranged at one of the four corners of the tabletop 9. That is, the marker display member 130a is arranged at the left end of the front end of the tabletop 9, the marker display member 130b is arranged at the right end of the front end of the tabletop 9, the marker display member 130c is arranged at the left end of the rear end of the tabletop 9, and the marker display member 130d is arranged at the right end of the rear end of the tabletop 9.

A frame portion 9a is erected on the upper surface of the tabletop 9, surrounding the outer edge of the tabletop 9. Each of the marker display members 130a to 130d is positioned by abutting against the inside of two intersecting sides of the frame portion 9a and placed on the tabletop 9. In other words, each of the marker display members 130a to 130d is removably installed on the tabletop 9.

Each of the marker display members 130a to 130d is made of a plate-shaped resin molded body having a rectangular outer shape and a certain thickness. That is, when each of the marker display members 130a to 130d is placed on the top plate 9, the top surface of the marker display member 130a to 130d is a parallel top surface 131a to 131d that is parallel to the top plate 9. Then, the markers 13a to 13d are printed and displayed on the parallel top surfaces 131a to 131d, respectively.

As shown in Figures 4 and 5, the elliptical shapes of the markers 13a to 13d are deformed shapes from a perfect circle as the normal shape. In other words, when the marker display members 130a to 130d installed on the tabletop 9 are viewed from directly above in a direction perpendicular to the tabletop 9, the planar shapes of the markers 13a to 13d are elliptical shapes that are deformed by a predetermined amount from a perfect circle as the normal shape. For this reason, as shown in Figure 4, which is a schematic diagram of an image taken of the tabletop 9 from directly above, the marker information contained in this image of the markers 13a to 13d is an ellipse that is a deformed shape that is deformed by a predetermined amount from a perfect circle as the normal shape.

The ellipse of markers 13a and 13b arranged at the front end of tabletop 9 and the ellipse of markers 13c and 13d arranged at the rear end of tabletop 9 have different amounts of deformation from a perfect circle. The ellipse of markers 13c and 13d has a longer major axis and a greater amount of deformation from a perfect circle than the ellipse of markers 13a and 13b. In addition, the inclination angle θ1 of the major axis of the ellipse of markers 13a and 13b relative to the long side of the front end of tabletop 9 is 45 degrees, and the inclination angle θ2 of the major axis of the ellipse of markers 13c and 13d relative to the long side of the front end of tabletop 9 is 30 degrees.

As shown in FIG. 6, which is a schematic diagram of an image captured from behind the tabletop 9 by a camera 29 (described later) in a normally installed state, each of the markers 13a to 13d, which constitutes marker information contained in an image captured by a camera 29 in a normally installed state, has a regular shape of a perfect circle or a roughly regular shape of an approximately perfect circle.

As shown in FIG. 3, a first control device 23 is provided inside the stove main body 7. The first control device 23 has a stove control unit 25 and a first communication control unit 27. The first communication control unit 27 is connected to a second communication control unit 35 of the second control device 31 (described later) via wireless communication such as Bluetooth (registered trademark), and receives a signal from the second communication control unit 35 and transmits the signal to the notification unit 21, etc. The stove control unit 25 adjusts the flame power of the stove burners 15a to 15c based on signals from the operation unit 19 and the first communication control unit 27, etc.

As shown in Figures 1 and 2, the camera module 11 is installed on the wall 3 at a position above and behind the top plate 9. The camera module 11 is located within the left-right width of the top plate 9. A range hood (not shown) is installed on the wall 3 above the camera module 11. The camera module 11 may be installed inside the range hood or on the ceiling.

The mounting position of the camera module 11 relative to the wall 3 can be finely adjusted using a mounting member (not shown). The camera module 11 also allows fine adjustment of the shooting direction of the camera 29, which will be described later.

The camera module 11 has a camera 29 and a second control device 31. The camera 29 is connected to the second control device 31. The camera 29 is located at the center of the left-right width of the tabletop 9. The camera 29 corresponds to a photographing unit, and is capable of photographing the entire tabletop 9. A digital CCD camera or the like can be used as the camera 29. The camera 29 may also be a video camera or the like capable of photographing moving images.

The second control device 31 has a camera installation state determination unit 33 and a second communication control unit 35. The camera installation state determination unit 33 further has an image processing unit 37 and a marker information extraction unit 39. The camera installation state determination unit 33 corresponds to the image capture unit installation state determination unit.

The image processing unit 37 acquires the image captured by the camera 29 and performs edge processing on the acquired image by grayscaling, edge extraction, binarization, etc.

The marker information extraction unit 39 extracts marker information contained in the image that has been edge-processed by the image processing unit 37. Specifically, the marker information extraction unit 39 performs a Hough transform on the edge-processed image to extract marker candidates, and if the marker extraction value is equal to or greater than a predetermined value Mv, it can be determined that the circle matches well and is determined to be a marker.

The camera installation state determination unit 33 determines whether a predetermined number of markers are placed at their respective predetermined positions based on the marker information obtained by the marker information extraction unit 39. As a result, the camera installation state determination unit 33 determines whether the installation state of each of the marker display members 130a to 130d is abnormal, and also determines whether the installation state of the camera 29 is abnormal.

In other words, if the number of markers in the marker information matches a predetermined number, and each marker position in the marker information matches a predetermined position, the camera installation status determination unit 33 determines that the predetermined number of markers are placed at the predetermined positions on the tabletop 9. In this case, the camera installation status determination unit 33 determines that the installation status of the markers 13a to 13d and the camera 29 is normal.

On the other hand, if the camera installation state determination unit 33 determines that the predetermined number of markers are not placed in the predetermined set positions, it determines that there is an abnormal marker installation state or an abnormal camera installation state. For example, if there are an insufficient number of markers on the tabletop 9, or if there are the predetermined number of markers on the tabletop 9 but the relative positions of the markers are not the predetermined set positional relationship, it is determined that there is an abnormal marker installation state. Also, for example, if there are the predetermined number of markers on the tabletop 9 and the relative positions of the markers are the predetermined set positional relationship but the markers are not placed in the predetermined set positions, that is, if the predetermined number of markers are in a normal positional relationship and the markers are tilted overall or shifted up, down, left, or right while maintaining the normal positional relationship, it is determined that there is an abnormal camera installation state in which the shooting direction of the camera 29 is shifted.

The second communication control unit 35 transmits a signal including the information determined by the camera installation status determination unit 33 to the first communication control unit 27 of the first control device 23.

When the cooking appliance 1 configured as described above is initially installed in a kitchen, the worker assembles the stove body 7 and the top plate 9 to the cooking counter 5, and temporarily installs the camera module 11 on the wall 3. An example of a process for correcting the camera position, etc., to properly install the camera 29 at this time will be described with reference to Figures 7 to 12. Note that the process for correcting the camera position, etc., is performed when the cooking appliance 1 is initially installed in a kitchen, and also when the camera module 11 is reinstalled on the wall 3 due to a malfunction, etc.

When the initial setting mode is started by a setting switch (not shown) provided on the stove body 7 or the camera module 11, as shown in FIG. 8, a signal from the first communication control unit 27 of the first control device 23 displays "Please place markers on the four corners of the tabletop" on the notification unit 21. The worker follows this and places the marker display members 130a to 130d on the four corners of the tabletop 9.

As shown in FIG. 7, when the initial setting mode is started, the camera 29 of the camera module 11 captures an image of the tabletop 9 (step S1). The captured image is sent from the camera 29 to the camera installation state determination unit 33 of the second control device 31. In the camera installation state determination unit 33, the image processing unit 37 performs a predetermined edge processing on the sent image, and sends the edge-processed image to the marker information extraction unit 39.

The marker information extraction unit 39 extracts marker candidates contained in the edge-processed image (step S2). That is, marker candidates are extracted from the image in descending order of marker extraction value. Then, it is determined whether the marker extraction value is equal to or greater than a predetermined value Mv. If the marker extraction value is equal to or greater than the predetermined value Mv, the marker candidate is confirmed as a marker. This marker confirmation process is repeated, and it is determined whether the number of confirmed markers matches a predetermined set number Mn (step S3).

For example, as shown in the schematic diagram of the captured image in FIG. 9, if the marker display member 130c is not installed at the left end of the rear end of the tabletop 9 and the marker 13c that should be there is not present in the captured image, the confirmed number of markers is determined to be three in step S3, and it is determined that there are not enough markers. Also, for example, if the confirmed number of markers is determined to be five in step S3, it may be determined that there is a foreign object on the tabletop 9 that may be erroneously recognized as a marker. In these cases of abnormal marker placement, information is sent as abnormality notification 1 to the notification unit 21 via the second communication control unit 35 and the first communication control unit 27 (step S4). As shown in FIG. 10, the notification unit 21 displays abnormality notification 1 saying, "The marker could not be recognized. Please place the marker again. Do not place anything other than markers on the tabletop."

If the number of confirmed markers matches the predetermined number Mn in step S3, the marker positions are analyzed (step S5) and it is determined whether the marker positions are correct (step S6). Note that the marker positions can be determined, for example, by examining the slopes of the lines connecting adjacent markers.

For example, if all four markers determined in step 3 are in the specified setting positions, it is determined that the markers are correctly installed and the camera is correctly installed. In this case, the camera installation state determination unit 33 determines that the installation state of the camera 29 is normal, and the initial setting mode ends.

On the other hand, for example, as shown in the schematic diagram of a captured image in which the tabletop 9 is tilted, as shown in FIG. 11, if there is a predetermined set number of four markers 13a to 13d, but none of the markers are positioned in the predetermined set position, it can be determined that the markers are in a normal installation state and the camera is in an abnormal installation state.

In this case, information as abnormality notification 2 is sent to the notification unit 21 via the second communication control unit 35 and the first communication control unit 27 (step S7). As shown in FIG. 12, the notification unit 21 displays "Camera tilt has been detected. Please re-install the camera" as abnormality notification 2. The camera installation state determination unit 33 then determines that the installation state of the camera 29 is abnormal, and the initial setting mode ends abnormally.

In this cooking device 1, the markers 13a-13d are arranged on the outer periphery of the top plate 9, so the distance between the markers 13a-13d is wider than when the markers 13a-13d are arranged in the central region of the top plate 9, etc. This is advantageous for improving the detection accuracy when the camera installation state determination unit 33 detects, for example, the position of the top plate 9 from the marker information.

In addition, because the markers 13a to 13d are arranged on the outer periphery of the top plate 9, there is a low possibility that foreign objects with a shape similar to the markers will be present near the markers. This is advantageous in preventing erroneous recognition of the markers.

The markers 13a to 13d are also integral with the marker display members 130a to 130d, which are removably installed on the tabletop 9. Therefore, when the markers 13a to 13d are no longer needed, they can be removed from the tabletop 9 together with the marker display members 130a to 130d. This means that the markers 13a to 13d do not detract from the design of the tabletop 9, and there are no design restrictions imposed on the marker shape or position.

Therefore, in this cooking device 1, when the position of the top plate 9 is detected based on marker information when the camera module 11 is installed, the detection accuracy can be improved, and the design of the top plate 9 is not compromised when setting the markers 13a to 13d, and no design restrictions arise regarding the marker shape or position.

In particular, in this cooking device 1, the shapes of the markers 13a to 13d are each ellipses that are deformed a predetermined amount from a perfect circle so that the marker shape in the marker information included in the image captured by the camera 29 when it is properly installed is a perfect circle as the normal shape. As a result, the shapes of the markers 13a to 13d in the marker information extracted from the captured image are perfect or nearly perfect circles, making image analysis easier and enabling the analysis time to be shortened.

Example 2
In the cooking device 1 of the second embodiment, the configurations of the markers 13a to 13d and the marker display members 130a to 130d are changed.

Figure 14 shows a schematic diagram of an image of the marker display members 130a and 130b installed on the front side of the tabletop 9 taken from directly above the tabletop 9, and Figure 15 shows a schematic diagram of an image of the marker display members 130c and 130d installed on the rear side of the tabletop 9 taken from directly above the tabletop 9. Figure 16 shows a schematic diagram of an image of the marker display members 130a to 130d taken from behind the tabletop 9 by the camera 29 in the normally installed state.

As shown in Figures 13, 14 and 16, the upper surface of the marker display member 130a installed at the left end of the front end of the tabletop 9 is an inclined upper surface 132a, and a marker 13a having a regular shape and a perfect circle is printed on this inclined upper surface 132a. The inclination direction and inclination angle of the inclined upper surface 132a of the marker display member 130a are set so that the shape of the marker 13a in the marker information contained in an image captured by a camera 29 that is correctly installed is a perfect circle or an approximately perfect circle. In other words, the camera 29 is positioned on the normal to the inclined upper surface 132a.

Similarly, the upper surface of the marker display member 130b installed at the right end of the front end of the tabletop 9 is an inclined upper surface 132b, and a marker 13b with a regular shape and a perfect circle is printed on this inclined upper surface 132b. The inclination direction and inclination angle of the inclined upper surface 132b of the marker display member 130b are set so that the shape of the marker 13b in the marker information contained in an image captured by a camera 29 that is correctly installed is a perfect circle or an approximately perfect circle. In other words, the camera 29 is positioned on the normal to the inclined upper surface 132b.

As shown in FIG. 14, when the marker display member 130a or 130b installed on the tabletop 9 is viewed from directly above, the shape of the marker 13a or 13b becomes an ellipse that is deformed from a perfect circle by a large predetermined amount. As shown in FIG. 16, each marker 13a or 13b as marker information contained in an image captured by a camera 29 that is properly installed becomes a perfect circle as a regular shape or an approximately regular circle as an approximately regular shape.

As shown in Figures 13, 15, and 16, the upper surface of the marker display member 130c installed at the left end of the rear end of the tabletop 9 is an inclined upper surface 132c, and a marker 13c having a regular shape and a perfect circle is printed on this inclined upper surface 132c. The inclination direction and inclination angle of the inclined upper surface 132c of the marker display member 130c are set so that the shape of the marker 13c in the marker information included in an image captured by a camera 29 that is correctly installed is a perfect circle or an approximately perfect circle. In other words, the camera 29 is positioned on the normal to the inclined upper surface 132c.

Similarly, the upper surface of the marker display member 130d installed at the right end of the rear end of the tabletop 9 is an inclined upper surface 132d, and a marker 13d having a regular shape and a perfect circle is printed on this inclined upper surface 132d. The inclination direction and inclination angle of the inclined upper surface 132d of the marker display member 130d are set so that the shape of the marker 13d in the marker information contained in an image captured by a camera 29 that is correctly installed is a perfect circle or an approximately perfect circle. In other words, the camera 29 is positioned on the normal to the inclined upper surface 132d.

As shown in FIG. 15, when the marker display member 130c or 130d installed on the tabletop 9 is viewed from directly above, the shape of the marker 13c or 13d becomes an ellipse that is deformed from a perfect circle by a small predetermined amount of deformation. As shown in FIG. 16, each marker 13c or 13d as marker information contained in an image captured by a camera 29 that is properly installed becomes a perfect circle as a regular shape or an approximately regular circle as an approximately regular shape.

In this cooking device 1, the markers 13a to 13d are displayed in the form of regular circles on the inclined upper surfaces 132a to 132d of the marker display members 130a to 130d, making it easy to display the markers 13a to 13d and easy to form the markers 13a to 13d.

The other configurations and effects are the same as in Example 1.

Although the present invention has been described above with reference to Examples 1 and 2, it goes without saying that the present invention is not limited to the above Examples 1 and 2, and can be modified as appropriate without departing from the spirit of the present invention.

In the first and second embodiments, the four markers 13a to 13d are arranged at the four corners of the tabletop 9, but the present invention is not limited to this. For example, the four markers 13a to 13d may be arranged in two locations that are not at both ends of one long side of the tabletop 9 and two locations that are not at both ends of the other long side, or three markers may be arranged in three locations, two locations at both ends of one long side and one location in the center of the other long side, or two markers may be arranged in two locations, one location in the center of one short side and one location in the center of the other short side.

In the first and second embodiments, the marker display members 130a to 130d are positioned by inscribing each of the marker display members 130a to 130d on the two intersecting sides of the frame portion 9a erected on the top surface of the tabletop 9, but the present invention is not limited to this. For example, each of the marker display members 130a to 130d may be positioned by providing an L-shaped vertical wall portion extending downward from the side surface of the two intersecting sides of each of the marker display members 130a to 130d and circumscribing the vertical wall portion on the two intersecting sides of the frame portion 9a. Alternatively, the frame portion 9a may be removed from the tabletop 9, the upper surface of the outer periphery of the tabletop 9 may be made flat, and each of the marker display members 130a to 130d may be positioned by circumscribing the L-shaped vertical wall portion provided on the lower surface of each of the marker display members 130a on the side surface of the two intersecting sides of the tabletop 9.

In the first and second embodiments, the markers 13a to 13d are displayed by printing on the marker display members 130a to 130d, but the present invention is not limited to this. For example, the markers 13a to 13d may be displayed three-dimensionally by providing an uneven shape on the upper surface of the marker display members 130a to 130d to make the markers 13a to 13d protrude or sink.

In the first and second embodiments, the marker display members 130a to 130d are made of a resin molded body, but the present invention is not limited to this, and label stickers or the like may be used instead of the resin molded body.

In the first and second embodiments, the markers 13a to 13d are displayed on the marker display members 130a to 130d, respectively, but the present invention is not limited to this. For example, multiple markers may be displayed by printing or the like at predetermined positions on a marker display member such as a strip.

In the first and second embodiments, a perfect circle is used as the regular shape of the markers 13a to 13d, but the present invention is not limited to this. For example, the markers 13a to 13d may be displayed so that a star or polygon is the regular shape. Furthermore, in addition to shapes, the markers may be displayed using characters, patterns, colors, etc.

In Examples 1 and 2, a liquid crystal display device is used as the notification unit 21, which is located at the center of the front side of the top plate 9. However, for example, a liquid crystal display device or the like may be installed on the front part of the stove body 7, or various information may be notified by audio output using a speaker or the like built into the cooking appliance. In addition, various information may be notified by wireless communication to a mobile terminal device such as a smartphone or tablet computer carried by the operator.

In the first and second embodiments, the present invention is applied to a gas stove in which the heating part is the stove burner 15a to 15c, but the present invention may also be applied to an electric stove such as an induction stove. In this case, multiple markers may be displayed by printing or the like at predetermined positions on a single sheet-like marker display member.

The present invention can be used, for example, in residential kitchens and kitchen equipment in facilities.

1... Cooking device 9... Top plate 11... Camera module 13a to 13d... Marker 130a to 130d... Marker display member 131a to 131d... Parallel upper surface 132a to 132d... Inclined upper surface 15a to 15c... Stove burner (heating section)
29…Camera (photography unit)
33...Camera installation state determination unit (photographing unit installation state determination unit)
39: Marker information extraction unit F: Food to be cooked

Claims (5)

A top plate having a heating section for heating food placed thereon;
A plurality of markers arranged on an outer periphery of the tabletop;
An imaging unit that is installed at a position away from the tabletop and images the tabletop;
a marker information extraction unit that extracts marker information related to the marker included in the image captured by the imaging unit;
an imaging unit installation state determination unit that determines an installation state of the imaging unit based on the marker information;
A cooking device according to claim 1, wherein the marker is integrally provided on a marker display member that is removably installed on the top plate. The cooking device according to claim 1, wherein the image capture unit installation state determination unit determines whether a predetermined number of the markers are placed at predetermined set positions based on the marker information. a deformed shape of the marker when the marker is placed on the tabletop and viewed from a direction perpendicular to the tabletop, the deformed shape being deformed from a predetermined normal shape,
3. The cooking device according to claim 1, wherein a marker shape in the marker information included in an image captured by the image capturing unit in a normal installation state is the regular shape or an approximately regular shape. The marker display member attached to the tabletop has an upper surface that is inclined with respect to the tabletop,
4. The cooking device according to claim 3, wherein the marker is represented as the regular shape on the inclined upper surface. The top surface of the marker display member attached to the top plate is a parallel top surface that is parallel to the top plate,
The marker is represented on the parallel top surface as the deformed shape;
4. The cooking device according to claim 3, wherein the regular shape is a perfect circle and the deformed shape is an ellipse.

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