Heating cooker and method for controlling heating cooker
阅读说明:本技术 加热烹调器以及加热烹调器的控制方法 (Heating cooker and method for controlling heating cooker ) 是由 谷口直哉 今井博久 松井严徹 于 2018-06-04 设计创作,主要内容包括:加热烹调器(100)具备:加热仓(201),其收纳加热对象物(203);第1照明(205a)以及第2照明(205b),它们照亮加热仓(201)内;摄影部(204),其设置于加热仓(201)中;摄影控制部(303),其使用摄影部(204)拍摄加热仓(201)内,并生成图像;以及加热控制部(301),其对加热仓(201)内进行加热。并且,摄影控制部(303)使摄影部(204)和第1照明(205a)以及第2照明(205b)中的至少任意一个照明动作,来拍摄第1图像,并且,使摄影部(204)和第1照明(205a)以及第2照明(205b)中的至少任意一个照明动作,来拍摄第2图像。此外,加热控制部(301)根据第1图像与第2图像的关系来进行加热仓(201)内的加热。(A heating cooker (100) is provided with: a heating chamber (201) for accommodating a heating object (203); a1 st illumination (205a) and a2 nd illumination (205b) that illuminate the interior of the heating chamber (201); an imaging unit (204) provided in the heating chamber (201); a photographing control unit (303) that photographs the inside of the heating chamber (201) using the photographing unit (204) and generates an image; and a heating control unit (301) that heats the interior of the heating chamber (201). The imaging control unit (303) operates the imaging unit (204) and at least one of the 1 st illumination (205a) and the 2 nd illumination (205b) to capture the 1 st image, and operates the imaging unit (204) and at least one of the 1 st illumination (205a) and the 2 nd illumination (205b) to capture the 2 nd image. The heating control unit (301) heats the inside of the heating chamber (201) according to the relationship between the 1 st image and the 2 nd image.)
1. A heating cooker is provided with:
a heating chamber for accommodating a heating object;
1 st illumination and 2 nd illumination illuminating within said heated chamber;
a photographing part provided in the heating chamber;
a photographing control unit that photographs the inside of the heating chamber using the photographing unit and generates an image; and
a heating control part for heating the heating chamber,
the imaging control unit operates the imaging unit and at least one of the 1 st illumination and the 2 nd illumination to capture a1 st image under a1 st illumination condition, and operates the imaging unit and at least one of the 1 st illumination and the 2 nd illumination to capture a2 nd image under a2 nd illumination condition different from the 1 st illumination condition,
the heating control unit performs heating in the heating chamber according to a relationship between the 1 st image and the 2 nd image.
2. The heating cooker according to claim 1,
the cooking device includes a comparison determination unit that determines whether or not the heating object is present in the heating chamber based on a relationship between shadow areas appearing in each of the 1 st image and the 2 nd image, and notifies a heating condition to the heating control unit based on a result of the determination.
3. The heating cooker according to claim 2,
the comparison determination unit determines that a non-heating object is present in the heating chamber based on a relationship between a difference comparison value between the 1 st image and an empty image captured using the 1 st illumination and a difference comparison value between the 1 st image and the 2 nd image.
4. The heating cooker according to claim 2,
the comparison determination unit estimates the volume of the heating target based on the size of the shadow region.
5. The heating cooker according to claim 2,
the comparison and determination unit estimates the height of the heating target based on the length of the shadow region.
6. The heating cooker according to claim 4,
the comparison determination unit compares the heating setting time with a predetermined determination criterion based on the estimated volume.
7. The heating cooker according to claim 1,
the heating control unit heats the inside of the heating chamber based on a relationship between a calculation result of the 1 st image and the image in the empty state captured under the 1 st illumination condition and a calculation result of the 2 nd image and the image in the empty state captured under the 2 nd illumination condition.
8. A method for controlling a heating cooker, the heating cooker comprising: a heating chamber for accommodating a heating object; 1 st illumination and 2 nd illumination illuminating within said heated chamber; a photographing control unit that photographs the inside of the heating chamber using a photographing unit and generates an image; and a heating control part for heating the heating chamber, wherein,
the imaging control unit captures a1 st image of the inside of the heating chamber under a1 st illumination condition using at least one of the 1 st illumination and the 2 nd illumination,
the imaging control unit captures a2 nd image in the heating chamber under a2 nd illumination condition different from the 1 st illumination condition using at least one of the 1 st illumination and the 2 nd illumination,
the heating control unit performs heating in the heating chamber according to a relationship between the 1 st image and the 2 nd image.
Technical Field
The present disclosure relates to a heating cooker that heats food and a method for controlling the heating cooker.
Background
An example of a heating cooker is a microwave oven. In this microwave oven, after inputting a time for heating or the like, a user presses a button for starting heating. Thereby, the cooking is performed. Particularly, in stores such as convenience stores and supermarkets, the following services are sometimes performed: the food is supplied by putting lunch boxes, side dishes, etc. in a container and heating and cooking the purchased food using a microwave oven.
However, such a microwave oven has a problem that it is difficult for a user to input heating time one by one. Therefore, when the store is crowded, the user may press the operation start button even if the object to be heated is not correctly placed in the heating compartment. In this case, the heating control is performed in a dry-fire state in the bin.
In contrast, techniques for preventing dry burning and the like have been proposed.
For example, patent document 1 describes the following technique: a camera is mounted on a cooking device, the inside of a bin is photographed by the camera before cooking, the similarity between the photographed image and a pre-registered image in the bin is calculated, and if the similarity is a predetermined similarity, the state that the inside of the bin is empty is judged.
However, in the technique described in patent document 1, in a bin whose state changes depending on the use state of dirt on the bottom surface of the bin due to soup, sauce, or the like, it is difficult to accurately determine the state in the bin only by the similarity of the difference images.
Disclosure of Invention
The present disclosure has been made to solve the above-described conventional problems, and provides a heating cooker and a control method of the heating cooker, which can detect not only an empty state in a bin but also a state in the bin accurately without being affected by the presence or absence and size of dirt on a bin surface.
A heating cooker is provided with: a heating chamber for accommodating a heating object; 1 st illumination and 2 nd illumination that illuminate the interior of the heating chamber; a photographing part disposed in the heating chamber; a photographing control unit for photographing the interior of the heating chamber by using the photographing unit and generating an image; and a heating control unit that heats the inside of the heating chamber. The imaging control unit operates the imaging unit and at least one of the 1 st illumination and the 2 nd illumination to capture the 1 st image under the 1 st illumination condition, and operates the imaging unit and at least one of the 1 st illumination and the 2 nd illumination to capture the 2 nd image under the 2 nd illumination condition different from the 1 st illumination condition. The heating control unit performs heating in the heating chamber based on the relationship between the 1 st image and the 2 nd image.
A method for controlling a heating cooker, the heating cooker comprising: a heating chamber for accommodating a heating object; 1 st illumination and 2 nd illumination that illuminate the interior of the heating chamber; a photographing control unit for photographing the interior of the heating chamber by using the photographing unit and generating an image; and a heating control unit that heats the inside of the heating chamber. The imaging control unit images a1 st image in the heating chamber under the 1 st illumination condition using at least one of the 1 st illumination and the 2 nd illumination. The imaging control unit images a2 nd image in the heating chamber under a2 nd illumination condition different from the 1 st illumination condition using at least either one of the 1 st illumination and the 2 nd illumination. The heating control unit performs heating in the heating chamber based on the relationship between the 1 st image and the 2 nd image.
According to the present disclosure, a heating cooker and a method of controlling a heating cooker are provided, which can not only detect that the inside of a bin is empty, but also accurately detect the inside of the bin without being affected by the presence or absence and size of dirt on the bin surface.
Drawings
Fig. 1 is a perspective view showing an external appearance of a heating cooker according to embodiment 1 of the present disclosure.
Fig. 2 is a diagram showing a schematic configuration of a heating cooker according to embodiment 1 of the present disclosure.
Fig. 3 is a sectional view of the heating chamber as viewed from above, showing an example of the arrangement of the lighting of the heating cooker in embodiment 1 of the present disclosure.
Fig. 4 is a diagram showing an in-bin image (in-bin-empty image) registered in a storage portion of a heating cooker in embodiment 1 of the present disclosure.
Fig. 5 is a diagram showing an example of an image in a cabinet of a heating cooker in a state where a non-heating object (dirt or the like) is present in the cabinet in embodiment 1 of the present disclosure.
Fig. 6 is a diagram showing an example of an image in a cabinet of a heating cooker in a state where a heating object (food or the like) is placed in the cabinet in embodiment 1 of the present disclosure.
Fig. 7 is a diagram showing an example of a photographed image and a difference image during processing in the case where an object is present in a chamber of a heating cooker in embodiment 1 of the present disclosure.
Fig. 8 is a diagram showing an example of a photographed image and a difference image during processing in the case where dirt exists in the cabinet of the heating cooker in embodiment 1 of the present disclosure.
Fig. 9 is a diagram showing an example of a table of judgment criteria based on image difference comparison values according to embodiment 1 of the present disclosure.
Fig. 10 is a flowchart showing an operation of detecting the state of the heating chamber of the heating cooker according to embodiment 1 of the present disclosure.
Fig. 11 is a diagram showing an example of a photographed image and a difference image during processing in the case where an object is present in the heated chamber in embodiment 2 of the present disclosure.
Fig. 12 is a flowchart showing an operation of detecting the state of the heating compartment of the heating cooker according to embodiment 2 of the present disclosure.
Detailed Description
A heating cooker according to claim 1 of the present disclosure includes: a heating chamber for accommodating a heating object; 1 st illumination and 2 nd illumination that illuminate the interior of the heating chamber; a photographing part disposed in the heating chamber; a photographing control unit for photographing the interior of the heating chamber by using the photographing unit and generating an image; and a heating control unit that heats the inside of the heating chamber. The imaging control unit operates the imaging unit and at least one of the 1 st illumination and the 2 nd illumination to capture the 1 st image under the 1 st illumination condition, operates the imaging unit and at least one of the 1 st illumination and the 2 nd illumination to capture the 2 nd image under the 2 nd illumination condition different from the 1 st illumination condition, and heats the inside of the heating chamber according to a relationship between the 1 st image and the 2 nd image.
According to this configuration, in the heating chamber in which the state in the chamber constantly changes due to aging, usage conditions, and the like, it is possible to perform imaging by the imaging unit mounted in the heating chamber in synchronization with switching of a plurality of illumination conditions by illumination control, and to analyze a difference in shading due to a change in the illumination conditions. This makes it possible to detect not only an empty state in the bin but also a state in the bin more accurately without being affected by the presence or absence and the size of dirt on the bin surface, and to appropriately perform heating control.
The 2 nd aspect may further include a comparison determination unit that determines whether or not the heating target is present in the heating chamber based on a relationship between shadow areas appearing in each of the 1 st image and the 2 nd image, and notifies the heating control unit of the heating condition based on a result of the determination, in addition to the 1 st aspect.
Thus, in the heating chamber in which the state in the chamber constantly changes due to aging, usage conditions, and the like, the empty state can be accurately detected without being affected by the presence or absence of dirt on the chamber surface and the size of the dirt.
In the 3 rd aspect, in addition to the 2 nd aspect, the comparison determination unit may determine that the non-heating target exists in the heating chamber based on a relationship between a difference comparison value between the 1 st image and the empty image captured using the 1 st illumination and a difference comparison value between the 1 st image and the 2 nd image.
This makes it possible to notify the user of the prompt to clean the interior of the heating compartment, thereby keeping the interior of the compartment clean.
In the 4 th aspect, in addition to the 2 nd aspect, the comparison determination unit may estimate the volume of the heating target based on the size of the shadow region.
Accordingly, when it is determined that the heating chamber is empty, the safety can be further improved by a method of not only prohibiting heating but also restricting heating according to the volume of the object.
In the 5 th aspect, in addition to the 2 nd aspect, the comparison determination unit may estimate the height of the heating target based on the length of the shadow region.
Thus, the safety and usability can be improved by changing the heating method or the like in accordance with the height of the object.
In the 6 th aspect, in addition to the 4 th aspect, the comparison determination unit may compare the heating setting time with a predetermined determination criterion based on the estimated volume.
This prevents the heating time from being set to the volume of the object to be heated, which causes overheating.
In the 7 th aspect, in addition to the 1 st aspect, the heating control unit may perform heating in the heating chamber based on a relationship between a calculation result of the 1 st image and the image in the empty state captured using the 1 st illumination condition and a calculation result of the 2 nd image and the image in the empty state captured using the 2 nd illumination condition.
Thus, the state in the bin can be detected more accurately without being affected by the presence or absence and size of dirt on the bin surface, and heating control can be performed appropriately.
A method of controlling a heating cooker according to
Thus, in the heating chamber in which the state in the chamber constantly changes due to aging, usage conditions, and the like, the state in the chamber can be detected more accurately without being affected by the presence or absence and the size of dirt on the chamber surface, and the heating control of the inside of the heating chamber can be appropriately performed.
Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings as appropriate. However, the detailed description may be omitted. For example, detailed descriptions of known matters and substantially the same configuration may be omitted. This is to avoid unnecessary redundancy in the following description, which will be readily understood by those skilled in the art.
In addition, the drawings and the following description are provided for those skilled in the art to fully understand the present disclosure, and it is not intended to limit the subject matter recited in the claims by the drawings and the description.
(embodiment 1)
A heating cooker according to embodiment 1 of the present disclosure will be described below with reference to the drawings.
In the embodiment, a
Fig. 1 is a view showing an external appearance of a
The
The
In the present embodiment, the side of the
An
The
The cancel
The
The
The
In the present disclosure, the microwave emitted from the magnetron is exemplified as the heating unit, but the heating unit may be heated by at least one of a heater, hot air, and steam.
A camera 204 (an example of an image capturing unit) is disposed on the ceiling side of the
Further, for each pixel, an image represented by values of 0 to 255 may be generated for each of red, blue, and green colors. Further, the values corresponding to the respective pixels may also be represented by ranges other than 0 to 255 and expression methods.
In the present embodiment, the
In the present disclosure, as described later, by designing the illumination conditions, even if the
In the present embodiment, the
The
In the present embodiment, although the configuration using the LED is disclosed as the light source of the
The
Fig. 2 is a schematic configuration diagram showing
The
In the present embodiment, the
The
The photographing
The
The
Fig. 3 is a plan view showing an example of the
Fig. 3 is a view of the
In the present embodiment, the
By illuminating the inside of the
The shaded area Sa appears on the right bottom surface of the
In this way, by arranging the
In the present embodiment, the
That is, a clearer shaded area S can be generated on the front side of the
In the present disclosure, the 1 st lighting condition in which the
Here, the preferential lighting means that, for example, under the lighting condition C1, the
In this way, each of the lighting conditions C1 and C2 may be a lighting condition in which the division of the shadow region Sa and the shadow region Sb between the two lighting conditions becomes easy.
Fig. 4 is a diagram showing an example of an image in the
In this example, an example of an image in a state where the inside of the chamber is "empty", that is, a state where the
Fig. 5 and 6 are diagrams showing an example of another image obtained by capturing an image of the inside of the
In this example, fig. 5 shows an example of an image obtained by imaging the inside of the
Fig. 7 is a diagram showing an example of a photographed image in a case where an object (heating target 203) is present in the
In fig. 7, (a) is a diagram showing a photographic image under the illumination condition C1. In fig. 7 (a), a shadow area Sa appears on the front right side of the
Fig. 7 (b) shows a photographic image under the illumination condition C2. In fig. 7 (b), a shaded area Sb appears on the front left side of the
Fig. 7 (c) shows an image obtained by binarizing the difference between the empty image stored in the
For example, a predetermined threshold value for binarization when each pixel of an image is expressed by a value in a range of 0 to 255 is 20. In this case, pixels having a difference value between the empty image and the image (a) of fig. 7 of 20 or more are expressed by a value of 1, and pixels having a difference value of less than 20 gray levels are expressed by a value of 0. In addition, the expression method of each pixel and the predetermined threshold value for binarization can be appropriately determined. In this way, by comparing the image of fig. 7 (a) with the empty image, an image excluding the influence of the
Fig. 7 (d) shows a differential binarized image between the null image and the image of fig. 7 (b). The method of difference calculation and binarization is the same as in the case of (c) of fig. 7.
Fig. 7 (e) shows a difference image between the images of fig. 7 (c) and 7 (d). That is, the absolute value of the difference is calculated and displayed for each pixel for the images of fig. 7 (c) and 7 (d).
In fig. 7 (e), only the shaded region Sa and the shaded region Sb formed by the
In the image of (a) of fig. 7 taken in the
In contrast, in the present disclosure, comparison with an empty image is performed in the generation of the images of fig. 7 (c) and 7 (d), so that the influence of the difference between the two illumination conditions on the image difference inside the
Fig. 8 shows an example of a photographed image and a difference image during processing in the case where the dirt D exists in the
In fig. 8, (a) of fig. 8 shows a photographic image under the illumination condition C1. In fig. 8, the illumination is illuminated from the left inner side, but since the dirt D is planar, the shaded area S does not appear.
Fig. 8 (b) shows a photographic image under the illumination condition C2. In fig. 8, the illumination is illuminated from the inner right side, but since the dirt D is planar, the shaded area S does not appear.
Fig. 8 (c) shows a differential binarized image between the null image and the image of fig. 8 (a). Fig. 8 (d) shows a differential binarized image between the null image and the image of fig. 8 (b).
Fig. 8 (e) shows a difference image between the images of fig. 8 (c) and fig. 8 (d). Here, since the dirt D is planar, the shaded area S is not extracted.
Fig. 9 is a diagram showing an example of a table defining criteria for the determination of the in-bin state and the determination of the possibility or impossibility of heating by the
Here, a feature quantity indicating the degree of difference between two images is defined as a difference comparison value. In the present embodiment, a difference is calculated for each pixel between two images, each difference value is compared with a predetermined threshold value for binarization, and the total number of pixels having a value of 1 in the binarized image is used as a difference comparison value.
Further, a differential binarized image between the empty image and the determination target image under the illumination condition C1 is defined as a differential image P1, and a differential comparison value is defined as a differential comparison value a 1. Also, the differential binarized image between the empty image and the determination target image under the illumination condition C2 is defined as a differential image P2, and the differential comparison value is defined as a differential comparison value a 2. Further, a differential comparison value between the differential image P1 and the differential image P2 is defined as a differential comparison value B.
The
Fig. 9 shows a reference example for determining which state of the
In the example of fig. 9, the
Further, the
In the present embodiment, the 1 st image difference threshold is set to 200, and the 2 nd image difference threshold is set to 500. However, the respective values may be appropriately selected.
In the present embodiment, in the case of performing image comparison and generating a binarized image, the luminance difference in each pixel is counted when exceeding a predetermined value, but any method may be used as long as the image difference can be extracted, and image similarity, color difference in each pixel, and the like may be used.
In the present embodiment, the differential comparison value under the illumination condition C1 is defined as the differential comparison value a1, but the differential comparison value a1 may be the differential comparison value under the illumination condition C2 or the differential comparison value under the 3 rd illumination condition different from the illumination conditions C1 and C2.
Fig. 10 is a flowchart showing an operation of detecting the state of the
The following describes the details with reference to the flowchart of fig. 10.
In step S1, the
In step S2, the photographing
In step S3, the
Fig. 7 (c) and 8 (c) are examples of the binarized image obtained by calculating the difference in step S3. The difference value calculated in step S3 corresponds to the difference comparison value a1 in fig. 9.
In step S4, the
In step S5, the
In step S6, the photographing
In step S7, the
In step S8, the
As shown in fig. 7 (e), when an object, that is, a three-dimensional object, exists in the
In step S9, the
In step S11, the user is notified of the dirt in the bin, and the process is terminated without heating.
In the present embodiment, the determination criterion and the threshold shown in fig. 9 are only an example, and the values are not limited, and may be freely set at the time of manufacture or at the time of use. The number of divisions of the table may be increased compared to fig. 9 to determine the size of the object and the dirt. The criterion for determining whether or not heating is possible in each determination result of the state in the
In addition, in the present embodiment, an example is given in which the illumination condition C1 is "left illumination only is on '", and the illumination condition C2 is "right illumination only is on'", but other combinations are possible as long as a difference can be generated in the shadow formed on the object under the illumination conditions C1 and C2. For example, the illumination condition C1 may be "off for both left and right illumination" (incident of only external light from the glass window 103) ", and the illumination condition C2 may be" on for only right illumination ". In addition, the lighting condition C1 may be "left lighting" on "and the direction of lighting may be set to the 1 st angle", and the lighting condition C2 may be "left lighting" on "and the direction of lighting may be set to the 2 nd angle".
As described above, according to the present embodiment, in the heating cooker in which the state in the
(embodiment 2)
Fig. 11 is a diagram showing an example of a photographic image in the case where an object is present in the
Fig. 12 is a flowchart showing an operation of detecting the state of the heating compartment of the heating cooker according to embodiment 2 of the present disclosure.
Hereinafter, embodiment 2 will be described with reference to the flowchart of fig. 12.
The main difference between embodiment 1 and embodiment 2 is that in embodiment 2, when it is determined in step S9 that an object is present in the
Hereinafter, differences from embodiment 1 will be mainly described, and a detailed description of the same control will be omitted.
The illumination condition C1 and the illumination condition C2 in the present embodiment are combined such that only the shadow region S is extracted when the difference between the captured images is calculated. For example, the lighting condition C1 turns both the
In step S9, if the
In step S12, the
In step S13, the
The determination criterion may be defined by a function indicating the upper limit and the lower limit of an appropriate range of the heating setting time with respect to the volume, or may be in the form of dividing the volume into several ranges and defining an appropriate heating time range corresponding thereto in a table. When the
In step S14, the heating time set is notified that the volume of the
In the present embodiment, heating is prohibited when the
As described above, according to the present embodiment, the volume of the
In addition, in the present embodiment, the volume is estimated from the shaded region S. However, the height of the
As described above, according to the heating cooker and the control method of the heating cooker of the present disclosure, the state in the bin is detected more accurately, so that heating under an appropriate heating condition can be performed, and the risk of overheating due to dry burning or the like can be prevented. In addition, even in the presence of dirt, the user can be prompted to remove the dirt easily, and the user can heat-cook food cleanly and safely.
(other embodiments)
Other embodiments of the above-described embodiments will be described.
A heating cooker such as a microwave oven can be connected to a network, and can be implemented as a heating cooking system that controls the heating cooker by using a server on the network. In such a heating and cooking system, both or either of the processes performed by the
Further, the above-described embodiments are intended to exemplify the technology in the present disclosure, and various modifications, substitutions, additions, omissions, and the like may be made within the scope of the claims and the equivalent thereof.
Industrial applicability
According to the present disclosure, not only can the empty state in the delivery bin be detected, but also the state in the delivery bin can be accurately detected without being affected by the presence or absence and size of dirt on the bin surface. Therefore, the microwave oven can be widely applied to heating cookers such as household microwave ovens, rice cookers, and IH cooking heaters, in addition to microwave ovens used in shops, and is very useful.
Description of the reference symbols
100: a microwave oven (heating cooker);
101: a housing;
102: a door;
103: a glass window;
104: a handle;
105: an operation display unit;
106: a liquid crystal display;
107: a time setting button group;
108: a heating start button;
109: a cancel button;
110: a pause button;
201: a heating chamber;
202a, 202 b: a magnetron;
203: heating an object;
204: a camera (photographing section);
205a, 205 b: illuminating;
300: a control unit;
301: a heating control unit;
302: a comparison determination unit;
303: a photographing control unit;
304: a storage unit;
a1, A2, B: a differential comparison value;
d: fouling;
la, Lb: an optical axis;
s, Sa, Sb: a shaded area.
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