WO2018225666A1 - Appareil de cuisson à chauffage et son procédé de commande - Google Patents

Appareil de cuisson à chauffage et son procédé de commande Download PDF

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Publication number
WO2018225666A1
WO2018225666A1 PCT/JP2018/021301 JP2018021301W WO2018225666A1 WO 2018225666 A1 WO2018225666 A1 WO 2018225666A1 JP 2018021301 W JP2018021301 W JP 2018021301W WO 2018225666 A1 WO2018225666 A1 WO 2018225666A1
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WIPO (PCT)
Prior art keywords
heating
image
illumination
heating chamber
control unit
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Application number
PCT/JP2018/021301
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English (en)
Japanese (ja)
Inventor
直哉 谷口
今井　博久
巌徹 松井
Original Assignee
パナソニックＩｐマネジメント株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to CN201880037302.2A priority Critical patent/CN110730887B/zh
Priority to JP2019523514A priority patent/JP7190632B2/ja
Publication of WO2018225666A1 publication Critical patent/WO2018225666A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/18—Arrangement of compartments additional to cooking compartments, e.g. for warming or for storing utensils or fuel containers; Arrangement of additional heating or cooking apparatus, e.g. grills
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/02—Stoves or ranges heated by electric energy using microwaves
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis

Definitions

  • the present disclosure relates to a heating cooker that heats food and a control method of the heating cooker.
  • microwave oven As an example of a cooking device.
  • the user presses a button for starting heating after inputting a heating time or the like. Thereby, heat cooking is performed.
  • stores such as convenience stores and supermarkets, there are cases in which lunch boxes and prepared dishes are sold in containers, and the purchased food is cooked and cooked using a microwave oven.
  • Patent Document 1 a camera is mounted on a heating cooker, and before cooking, the inside of the warehouse is photographed by this camera, and the similarity between the photographed image and the empty image registered in advance Describes a technique for determining that the interior is empty if a predetermined similarity is calculated.
  • the present disclosure solves the above-described conventional problems, and not only the interior of the warehouse is empty, but also the state of the interior of the warehouse is accurately detected without being affected by the presence or absence or size of the dirt on the warehouse surface.
  • a heating cooker and a heating cooker control method that can be performed.
  • the heating cooker includes a heating chamber for storing an object to be heated, a first illumination and a second illumination for illuminating the inside of the heating chamber, a photographing unit provided in the heating cabinet, and a photographing unit. And a heating control unit that heats the interior of the heating chamber.
  • the imaging control unit operates the imaging unit and at least one of the first illumination and the second illumination to capture the first image under the first illumination condition, and the imaging unit, The second image is photographed under a second illumination condition different from the first illumination condition by operating at least one of the illumination and the second illumination.
  • the heating controller performs heating in the heating chamber based on the relationship between the first image and the second image.
  • the control method of the heating cooker generates an image by photographing the inside of the heating chamber using the heating chamber for storing the object to be heated, the first illumination and the second illumination that illuminate the inside of the heating chamber, and the imaging unit. It is a control method of the heating cooker provided with an imaging
  • the imaging control unit captures a second image in the heating chamber under a second illumination condition different from the first illumination condition using at least one of the first illumination and the second illumination. .
  • the heating controller performs heating in the heating chamber based on the relationship between the first image and the second image.
  • the interior of the refrigerator is empty, but also a cooking device that can accurately detect the state of the refrigerator without being affected by the presence or absence and size of dirt on the storage surface. And a method of controlling the cooking device.
  • FIG. 1 is a perspective view illustrating an appearance of a heating cooker according to the first embodiment of the present disclosure.
  • FIG. 2 is a diagram illustrating a schematic configuration of the heating cooker according to the first embodiment of the present disclosure.
  • FIG. 3 is a cross-sectional view as viewed from above in the heating chamber, showing an example of the arrangement of the lighting of the heating cooker in the first embodiment of the present disclosure.
  • FIG. 4 is a diagram illustrating an in-compartment image (in-compartment empty image) registered in the storage unit of the cooking device according to the first embodiment of the present disclosure.
  • FIG. 1 is a perspective view illustrating an appearance of a heating cooker according to the first embodiment of the present disclosure.
  • FIG. 2 is a diagram illustrating a schematic configuration of the heating cooker according to the first embodiment of the present disclosure.
  • FIG. 3 is a cross-sectional view as viewed from above in the heating chamber, showing an example of the arrangement of the lighting of the heating cooker in the first embodiment of the present disclosure.
  • FIG. 5 is a diagram illustrating an example of an in-compartment image in a state where an unheated object (dirt or the like) is present in the interior of the heating cooker according to the first embodiment of the present disclosure.
  • FIG. 6 is a diagram illustrating an example of an in-compartment image in a state where a heating object (food or the like) is placed in the interior of the heating cooker according to the first embodiment of the present disclosure.
  • FIG. 7 is a diagram illustrating an example of a captured image in the case where an object is present in the storage of the heating cooker and a difference image in the process in the first embodiment of the present disclosure.
  • FIG. 8 is a diagram illustrating an example of a captured image and a difference image in the process in the case where dirt is present in the cooking device storage according to the first embodiment of the present disclosure.
  • FIG. 9 is a diagram illustrating an example of a determination criterion table based on image difference comparison values according to the first embodiment of the present disclosure.
  • FIG. 10 is a flowchart illustrating an operation of detecting the state of the heating chamber of the heating cooker according to the first embodiment of the present disclosure.
  • FIG. 11 is a diagram illustrating an example of a captured image and a difference image in the processing process when an object is present in the heating chamber according to the second embodiment of the present disclosure.
  • FIG. 12 is a flowchart illustrating an operation of detecting the state of the heating chamber of the heating cooker according to the second embodiment of the present disclosure.
  • the heating cooker includes a heating chamber that stores a heating target, a first illumination and a second illumination that illuminate the inside of the heating chamber, and a photographing unit provided in the heating chamber,
  • photography part is image
  • the imaging control unit operates the imaging unit and at least one of the first illumination and the second illumination to capture the first image under the first illumination condition, and the imaging unit; At least one of the first illumination and the second illumination is operated to take a second image under a second illumination condition different from the first illumination condition, and the heating control unit Based on the relationship between the image and the second image, heating in the heating chamber is performed.
  • shooting by the imaging unit mounted in the heating chamber is synchronized with switching of a plurality of lighting conditions by lighting control. And analyze the difference in shadow due to changes in lighting conditions.
  • a 2nd aspect determines whether a heating target object exists in a heating chamber based on the relationship of the shadow area which appears in each of the 1st image and the 2nd image in the 1st aspect, A comparison / determination unit that notifies the heating control unit of the heating condition according to the determination result may be provided.
  • the comparison / determination unit includes a difference comparison value between the first image and the sky image photographed using the first illumination, the first image, and the second image. Based on the relationship with the difference comparison value, it may be determined that there is an unheated object in the heating chamber.
  • the comparison determination unit may estimate the volume of the heating object based on the size of the shadow region.
  • the heating chamber when it is determined that the heating chamber is empty, not only the heating is prohibited, but also the safety can be further enhanced by a method of limiting the heating according to the volume of the object.
  • the comparison / determination unit may estimate the height of the heating object based on the length of the shadow region.
  • a comparison determination part may compare a heating setting time with a predetermined
  • the heating control unit calculates the first image and the calculation result of the sky image captured using the first illumination condition, the second image, and the second image. Heating in the heating chamber may be performed based on a relationship with a calculation result with an empty image photographed using the illumination conditions.
  • the inside of the heating chamber is photographed using a heating chamber for storing the object to be heated, the first illumination and the second illumination for illuminating the inside of the heating chamber, and the photographing unit, and an image is generated.
  • It is a control method of the heating cooker provided with a control part and the heating control part which heats the inside of a heating chamber.
  • the imaging control unit captures the first image under the first illumination condition using at least one of the first illumination and the second illumination.
  • the imaging control unit captures the second image using a second illumination condition different from the first illumination condition using at least one of the first illumination and the second illumination.
  • the heating controller performs heating in the heating chamber based on the relationship between the first image and the second image.
  • the inside of the heating chamber can be appropriately heated.
  • a microwave oven 100 will be used as an example of a heating cooker.
  • FIG. 1 is a diagram illustrating an appearance of a microwave oven 100 according to the first embodiment of the present disclosure.
  • a housing 101 and a door 102 pivotally supported by the housing 101 so as to be opened and closed.
  • a heating cabinet 201 for storing food such as lunch boxes and side dishes to be heated.
  • the door 102 has a transparent glass window 103 so that the user can see the inside of the housing 101. Further, the door 102 has a handle 104 so that the user can easily grasp the door 102.
  • the following description will be given with the side of the housing 101 having the door 102 as the front, the right side as viewed from the front side as the right side, and the left side as the left side.
  • the operation display unit 105 includes a liquid crystal display 106, a time setting button group 107, a heating start button 108, a cancel button 109, and a pause button 110.
  • the user can set the heating time by using the number buttons and the minute and second buttons.
  • the liquid crystal display 106 displays the set heating time and the like.
  • the heating start button 108 is a button for the user to start heating after confirming the heating time, wattage, and the like with the liquid crystal display 106.
  • the cancel button 109 is a button for stopping heating after the user presses the heating start button 108 to start heating.
  • the cancel button 109 may be a button for canceling the setting of the heating time displayed on the liquid crystal display 106.
  • the pause button 110 is a button for the user to temporarily stop heating during heating. After the heating is temporarily stopped, the user can press the heating start button 108 again to perform the remaining heating from the middle.
  • the microwave oven 100 includes two magnetrons 202a and 202b that output microwaves in a heating chamber 201 as heating units (heaters).
  • the magnetron 202a is disposed on the ceiling side of the heating chamber 201, and outputs a microwave into the heating chamber 201 from above.
  • the magnetron 202b is disposed on the bottom surface side of the heating chamber 201, and outputs a microwave into the heating chamber 201 from below.
  • Foods such as lunch boxes and side dishes stored in the heating chamber 201, that is, the heating object 203 (see FIG. 2) are heated by the emitted microwaves.
  • the microwave by the magnetron is exemplified as the heating unit.
  • the heating unit may be heated by at least one of a heater, hot air, and steam.
  • a camera 204 (an example of a photographing unit) is disposed on the ceiling side of the heating chamber 201.
  • the camera 204 includes, for example, an image sensor such as a CCD (Charge Coupled Device) and an optical element such as a lens, and images the inside of the heating chamber 201 to generate an image.
  • the luminance is represented by a value in the range of 0 (dark) to 255 (bright) for each pixel.
  • each pixel may be generated as an image represented by a value from 0 to 255 for each color of red, blue, and green.
  • a value corresponding to each pixel may be represented by a range other than 0 to 255 and an expression method.
  • the camera 204 is provided on the ceiling side surface of the heating chamber 201.
  • the camera 204 may be provided on another surface such as the side surface of the heating chamber 201.
  • the image recognition accuracy can be improved even if the photographing unit 204 is configured by one camera member. Therefore, cost reduction at the time of manufacture and size reduction of the housing 101 can be realized.
  • the photographing unit 204 may be composed of a plurality of camera members.
  • an illumination 205a (first illumination) and an illumination 205b (second illumination) using LEDs as light sources are arranged.
  • the illumination 205a (first illumination) and the illumination 205b (second illumination) illuminate the inside of the heating cabinet 201.
  • the illumination 205a is arranged so as to face the inside of the heating cabinet 201 from the left side surface of the heating cabinet 201
  • the illumination 205b is arranged so as to face the inside of the heating cabinet 201 from the right side surface of the heating cabinet 201.
  • the illumination 205a and the illumination 205b may be disposed on any of the four side surfaces, the ceiling, the bottom surface, and the like.
  • the illumination 205a and the illumination 205b may be configured so that the illumination conditions for illuminating the inside of the heating chamber 201 can be switched between two or more types.
  • a single light source may be physically used, the optical path may be branched into two paths by at least one of an optical fiber and a mirror, and the heating chamber 201 may be illuminated from different directions.
  • the lighting condition may be switched by using one light emitting element and at least one of lighting ON / OFF and brightness intensity control. Further, the position and angle of illumination may be changed by motor control or the like.
  • the illumination condition may be switched according to at least one of illumination color and irradiation focus.
  • a plurality of illumination conditions may be switched by using three or more light sources.
  • a configuration using LEDs as the light sources of the illumination 205a and the illumination 205b is disclosed, but other light sources such as an electric light, a fluorescent lamp, and natural light may be used as the light source.
  • the illuminations 205a and 205b may use light sources that generate infrared rays. By using infrared rays as the light source, it is possible to cope with a case where the bottom surface is a surface that absorbs visible light, for example, a black surface.
  • the control unit 300 is disposed below the operation display unit 105.
  • the controller 300 controls each component of the microwave oven 100.
  • FIG. 2 is a schematic configuration diagram of the microwave oven 100 according to the first embodiment.
  • the control unit 300 includes a heating control unit 301, a comparison determination unit 302, an imaging control unit 303, and a storage unit 304.
  • control unit 300 is configured such that the heating control unit 301, the comparison determination unit 302, the imaging control unit 303, and the storage unit 304 are integrated. However, these configurations may be realized by separate semiconductor elements or the like.
  • the control unit 300 may be configured by a microcomputer such as a CPU (Central Processing Unit).
  • the heating control unit 301 controls the magnetron 202a and the magnetron 202b.
  • the object to be heated 203 stored in the heating chamber 201 is heated by the microwaves radiated from the magnetron 202a and the magnetron 202b.
  • the shooting control unit 303 performs ON / OFF control, strength control, and shooting control of the camera 204 synchronized with the lighting control of the lighting 205a and the lighting 205b.
  • the storage unit 304 stores an image in the heating chamber 201 captured by the imaging control unit 303 using the camera 204.
  • the comparison / determination unit 302 uses the camera 204 to cause the imaging control unit 303 to image the inside of the heating cabinet 201 and to perform comparative analysis of images stored in the storage unit 304. Thereby, the comparison / determination unit 302 recognizes the state in the heating chamber 201, and performs detection of the state of an object such as food, the presence / absence of an object, and the presence / absence of dirt, and estimation of volume and height.
  • FIG. 3 is an example showing the configuration of the illumination 205a and the illumination 205b and the inside of the heating cabinet 201 in a plan view.
  • FIG. 3 is a view of the bottom surface side of the heating chamber 201 from the ceiling side.
  • the lower side in FIG. 3 is the front side having the door 102.
  • the heating object 203 is stored on the bottom surface of the heating chamber 201.
  • the illumination 205a is disposed outside the left side wall of the heating chamber 201, and its optical axis La passes through a hole provided in the side wall so that the optical axis La is substantially the center (including the center) of the heating chamber 201. Facing the direction.
  • the illumination 205b is arrange
  • a shadow region S about the heating object 203 can be generated.
  • the shadow area Sa appears on the right bottom surface of the heating object 203 by the illumination 205a illuminating the heating chamber 201 from the left side. Moreover, when the illumination 205b illuminates the heating chamber 201 from the right side, a shadow region Sb appears on the left bottom surface of the heating target 203.
  • the illumination 205a and the illumination 205b are arranged so that the angle ( ⁇ in FIG. 3) formed by the optical axis La and the optical axis Lb is increased, the shadow region Sa and the shadow region under the respective illumination conditions are arranged. Sb overlap can be reduced. Thereby, the recognition accuracy by the difference of the image mentioned later can be improved. Therefore, it is preferable that the angle formed by the optical axis La and the optical axis Lb is 90 degrees or more.
  • the illumination 205a and the illumination 205b illuminate the inside of the heating chamber 201 from the rear to the front. Thereby, it can reduce that the unnecessary shadow component by the illumination of the environment where the microwave oven 100 is installed enters from the door 102 affects the shadow area S.
  • a clearer shadow region S can be generated on the front side of the heating chamber 201 as compared with the case of generating a shadow region on the rear side.
  • the arrangement configuration of the illumination 205a and the illumination 205b is not limited to the optical axis direction.
  • the first illumination condition that mainly uses the illumination 205a is an illumination condition C1.
  • the second illumination condition that mainly uses the illumination 205b is defined as an illumination condition C2. That is, the illumination condition C1 is an illumination condition that preferentially lights the illumination 205a, and the illumination condition C2 is an illumination condition that preferentially lights the illumination 205b.
  • lighting preferentially means lighting the lighting 205a with a higher luminance than the lighting 205b and lighting the lighting 205b with a lower luminance than the lighting 205a in the lighting condition C1. May be.
  • each of the illumination condition C1 and the illumination condition C2 may be an illumination condition that makes it easy to distinguish between the shadow area Sa and the shadow area Sb between the two illumination conditions.
  • FIG. 4 is a diagram illustrating an example of an in-chamber image captured in the heating chamber 201 and registered in the storage unit 304.
  • This example shows an example of an image when the interior is “empty”, that is, the heating object 203 such as food is not accommodated in the heating chamber 201.
  • a “empty” reference image (hereinafter referred to as a “empty image”) as shown in the example of FIG. 4 may be stored in the memory of the storage unit 304.
  • the above-described sky image may be generated and stored in the storage unit 304 in a use environment after factory shipment.
  • FIG. 5 and FIG. 6 are diagrams showing an example of another image taken in the heating chamber 201.
  • FIG. 5 shows a case where non-heated objects (planar dirt, foreign matter, etc.) exist in the heating chamber 201
  • FIG. 6 shows a heating object 203 (lunch box etc.) in the heating chamber 201.
  • FIG. 7 is a diagram illustrating an example of a captured image in the case where an object (heating target 203) exists in the heating chamber 201, and a difference image in the processing process.
  • FIG. 7A is a diagram showing a photographed image under the illumination condition C1.
  • the shadow area Sa appears on the right front side of the heating object 203 because the inside of the heating chamber 201 is illuminated from the left back side by the illumination 205a.
  • FIG. 7B shows a photographed image under the illumination condition C2.
  • the shadow area Sb appears on the left front side of the heating object 203 because the inside of the heating chamber 201 is illuminated from the right back side by the illumination 205b.
  • (C) of FIG. 7 shows an image obtained by binarizing the difference between the sky image stored in the storage unit 304 and the image of (a) of FIG. That is, difference calculation is performed for each pixel for the sky image and the image of FIG. 7A, and further, for binarization, the calculated difference is compared with a predetermined threshold value, and each pixel is calculated. What is expressed by “0” or “1” is the difference binarized image shown in FIG.
  • a predetermined threshold value for binarization when each pixel of an image is expressed by a value in the range of 0 to 255 is 20.
  • pixels whose difference value between the sky image and the image of FIG. 7A is 20 gradations or more are each represented by a value of 1, and pixels whose difference value is less than 20 gradations are respectively Expressed with a value of zero.
  • the expression method of each pixel and the predetermined threshold value for binarization may be determined as appropriate. In this way, by comparing the image of FIG. 7A and the sky image, an image excluding the influence of the heating chamber 201 can be generated.
  • FIG. 7 shows a difference binarized image between the sky image and the image of (b) of FIG.
  • the difference calculation and binarization methods are the same as in the case of FIG. 7C.
  • (E) of FIG. 7 shows a difference image between the images of (c) of FIG. 7 and (d) of FIG. That is, the absolute value of the difference is calculated and displayed for each pixel in the images of FIGS. 7C and 7D.
  • the illumination 205a is respectively shown in the image of FIG. 7A photographed in the heating chamber 201 under the illumination condition C1, and the image of FIG. 7B photographed in the heating chamber 201 under the illumination condition C2, the illumination 205a is respectively shown. And differences due to illumination 205b may occur. For example, the area close to the illumination 205a in FIG. 7A, the area close to the illumination 205b in FIG. 7B are brighter, and the areas far from the illumination 205a and 205b are darker. Shading or the like may occur. If a difference is calculated between these images, an unnecessary difference other than the heating object 203 and the shadow area S appears, and the extraction of the heating object 203 and the shadow area S may be adversely affected.
  • the image in the heating chamber 201 due to the difference between the two illumination conditions is obtained by comparing with the sky image.
  • the influence of the image difference can be reduced.
  • FIG. 8 shows an example of a captured image when the dirt D exists in the heating chamber 201 and a difference image in the process.
  • FIG. 8 shows a photographed image under the illumination condition C1.
  • the illumination is illuminated from the left back side, but since the dirt D is planar, the shadow region S does not appear.
  • FIG. 8B shows a photographed image under the illumination condition C2.
  • the illumination is illuminated from the right back side, but since the dirt D is planar, the shadow region S does not appear.
  • FIG. 8 shows a binarized difference image between the sky image and the image in (a) of FIG.
  • FIG. 8D shows a difference binarized image between the sky image and the image of FIG. 8B.
  • FIG. 8 shows a difference image between the images of (c) of FIG. 8 and (d) of FIG.
  • the dirt D is planar, the shadow region S is not extracted.
  • FIG. 9 is a diagram illustrating an example of a table in which the comparison determination unit 302 defines the internal state determination and the heat availability determination criterion.
  • a feature amount representing the degree of difference between two images is defined as a difference comparison value.
  • a difference is calculated for each pixel between two images, and each difference value is compared with a predetermined threshold value for binarization. The total number of pixels that are 1 is used as a difference comparison value.
  • the difference binarized image between the sky image and the determination target image under the illumination condition C1 is defined as a difference image P1
  • the difference comparison value is defined as a difference comparison value A1.
  • a difference binarized image between the sky image and the determination target image under the illumination condition C2 is defined as a difference image P2
  • a difference comparison value is defined as a difference comparison value A2.
  • a difference comparison value between the difference image P1 and the difference image P2 is defined as a difference comparison value B.
  • the comparison / determination unit 302 compares each difference comparison value with a predetermined image difference threshold value, thereby determining the state in the heating chamber 201 and determining whether heating is possible.
  • the table in FIG. 9 is used to determine whether the inside of the heating chamber 201 is empty, an object (an object to be heated), or a dirt, based on the relationship between the difference comparison value A1 and the difference comparison value B.
  • An example of the standard is shown.
  • the comparison determination unit 302 determines whether the heating chamber 201 is empty by comparing the difference comparison value A1 with a first image difference threshold value (here, the value is 200). When the difference comparison value A1 is smaller than the first image difference threshold, the comparison determination unit 302 determines that the difference value is due to the noise component of the image and the like that the heating chamber 201 is empty. In this case, the comparison determination unit 302 determines that the heating chamber 201 cannot be heated.
  • a first image difference threshold value here, the value is 200.
  • the comparison determination unit 302 further determines whether or not an object is present in the heating chamber 201 by comparing the difference comparison value B with a second image difference threshold value (500 in this case).
  • the difference comparison value B is larger than the second image difference threshold
  • the comparison determination unit 302 determines that a component due to the shadow of the object exists, that is, the heating object 203 exists in the heating chamber 201. In this case, the comparison determination unit 302 determines that the heating chamber 201 can be heated.
  • the difference comparison value B is small, the comparison determination unit 302 determines that there is a component that is not an object to be heated, that is, there is dirt D or the like. In this case, the comparison determination unit 302 determines that the heating chamber 201 cannot be heated.
  • the control unit 300 notifies the user of the presence of an unheated object such as dirt and foreign matter.
  • the first image difference threshold is set to 200, and the second image difference threshold is set to 500.
  • each value may be selected as appropriate.
  • a method is used to count when the luminance difference in each pixel exceeds a predetermined numerical value. Any method may be used, and an image similarity, a difference depending on the color of each pixel, or the like may be used.
  • the difference comparison value in the illumination condition C1 is defined as the difference comparison value A1, but the difference comparison value A1 may be the difference comparison value in the illumination condition C2, or the illumination conditions C1, It may be a difference comparison value in a third illumination condition that is different from C2.
  • FIG. 10 is a flowchart showing the operation of detecting the state of the heating chamber 201 of the microwave oven 100 in the first embodiment.
  • step S1 the imaging control unit 303 controls the illumination 205a and the illumination 205b to switch to the illumination condition C1 (for example, only the left illumination 205a is ON), and the process proceeds to step S2.
  • step S2 the imaging control unit 303 controls the camera 204 to perform imaging within the heating chamber 201, and the captured image is stored in the storage unit 304, and the process proceeds to step S3.
  • the captured image is an image with a shadow region S on the object as shown in FIG.
  • the photographed image is an image having no shadow region S as shown in FIG. 8A when there is no object in the cabinet and there is dirt D.
  • step S3 the comparison / determination unit 302 calculates a difference between the sky image in the illumination condition C1 stored in advance in the storage unit 304 and the image captured in step S2, and advances the process to step S4.
  • step S3 (C) in FIG. 7 and (c) in FIG. 8 are examples of images binarized by calculating the difference in step S3.
  • the difference value calculated in step S3 corresponds to the difference comparison value A1 in FIG.
  • step S4 the comparison / determination unit 302 determines whether or not the inside of the heating chamber 201 is empty from the difference value calculated in step S3 according to the determination criterion in the table of FIG.
  • the comparison determination unit 302 determines that the interior is empty. Based on this determination, the process is terminated without heating.
  • the difference value is 201 or more (S4, NO)
  • it is determined that there is an object or dirt in the warehouse and the process proceeds to step S5.
  • step S5 the imaging control unit 303 controls the illumination 205a and the illumination 205b to switch to the illumination condition C2 (for example, only the right illumination 205b is ON), and the process proceeds to step S6.
  • step S6 the imaging control unit 303 controls the camera 204 to perform imaging in the heating cabinet 201, the captured image is stored in the storage unit 304, and the process proceeds to step S7.
  • the captured image is an image with a shadow on the object as shown in FIG.
  • the photographed image is an image having no shadow area S as shown in FIG. 8B when there is no object in the warehouse and there is dirt.
  • step S7 the comparison / determination unit 302 calculates a difference between the sky image stored in the storage unit 304 in advance in the illumination condition C2 and the image captured in step S6, and proceeds to step S8.
  • (D) of FIG. 7 and (d) of FIG. 8 are examples of images binarized by calculating the difference in step S7.
  • step S8 the comparison / determination unit 302 calculates a difference between the difference image calculated in step S3 and the difference image calculated in step S7, and the process proceeds to step S9.
  • (E) in FIG. 6 and (e) in FIG. 8 are examples of the difference image calculated in step S8.
  • step S9 the comparison determination unit 302 determines the state in the heating chamber 201 from the difference value calculated in step S3 and the difference value calculated in step S8 according to the determination criterion in the table of FIG. For example, when the difference comparison value A1 is 201 or more and the difference comparison value B is 501 or more, it is determined that “an object has been detected”. And a process is advanced to step S10 and heating is implemented. On the other hand, when the difference comparison value A1 is 201 or more and the difference comparison value B is 500 or less, it is determined that “internal storage (empty) is detected”, and the process proceeds to step S11.
  • step S11 the user is informed of the state of dirt in the cabinet, and the process is terminated without heating.
  • the determination criteria and threshold values shown in FIG. 9 are merely examples, and the values are not limited and may be freely set at the time of manufacture or use.
  • the number of divisions of the table may also be increased from that in FIG. 9 to determine the size of the object and dirt.
  • the criterion for determining whether or not heating is possible for each determination result of the state in the heating chamber 201 is not limited to the criterion shown in FIG. 9, and may be set freely during manufacturing or use. Good.
  • the illumination condition C1 is “left illumination only ON” and the illumination condition C2 is “right illumination only ON” is given.
  • Other combinations may be used if they can make a difference.
  • the illumination condition C1 may be “both left and right illuminations OFF (only incident external light from the glass window 103)” and the illumination condition C2 may be “right illumination only ON”.
  • the illumination condition C1 may be “left illumination ON when the illumination direction is the first angle”
  • the illumination condition C2 may be “left illumination ON and the illumination direction is the second angle”.
  • the present embodiment in a heating cooker in which the state in the heating chamber 201 is constantly changed due to secular change and usage status, the presence or absence and the size of the surface of the cooking chamber are not affected. It is possible to accurately detect that it is empty. Further, since it is not necessary to update the reference sky image when performing the difference comparison, simple operation is possible and stable in-house state determination can be realized.
  • FIG. 11 is a diagram illustrating an example of a captured image and a difference image in the processing process when an object is present in the heating chamber 201 according to the second embodiment of the present disclosure.
  • (A) to (e) in FIG. 11 are the same as those in FIGS. 7 (a) to (e) in the first embodiment.
  • FIG. 12 is a flowchart illustrating an operation of detecting the state of the heating chamber of the heating cooker according to the second embodiment of the present disclosure.
  • the main difference between the first embodiment and the second embodiment is that in the second embodiment, when it is determined in step S9 that there is an object in the heating cabinet 201, the heating object 203 is changed. The volume is estimated, and the validity of the set heating time is determined for the estimated volume.
  • the illumination condition C1 and the illumination condition C2 are combined such that only the shadow region S is extracted when the difference between the captured images is calculated.
  • the illumination condition C1 turns on both the illuminations 205a and 205b attached to the left and right side surfaces of the heating chamber 201, and the illumination condition C2 turns on only the left illumination 205a of the illumination.
  • the left and right illuminations 205a and 205b cancel the shadows formed on the objects in the heating chamber 201, so that no shadow appears in the photographed image or becomes thin as shown in FIG. .
  • the illumination condition C2 as shown in FIG. 11B, the shadow of the object appears clearly in the captured image. For this reason, by calculating the difference between the captured images of these illumination conditions C1 and C2, only the shadow region S is extracted, and the size of the shadow can be measured.
  • the illumination conditions C1 and C2 may be other combinations as long as the shadow region S can be extracted.
  • step S9 when the comparison / determination unit 302 determines that there is an object, the process proceeds to step S12.
  • step S12 the comparison determination unit 302 calculates the difference between the difference image in step S3 ((c) in FIG. 11) and the difference image in step S7 ((d) in FIG. 11).
  • a shadow region S as shown in e) is extracted.
  • the length of the shadow area S is appropriately multiplied by a correction coefficient corresponding to the position in the heating chamber 201 to obtain the height of the target object.
  • the difference area ((c) in FIG. 11) calculated in step S3 corresponds to the area of the object in plan view of the target object, and the volume is calculated by multiplying this by the height, and the process proceeds to step S13.
  • step S13 the comparison / determination unit 302 compares the volume estimated in step S12 with the heating time set by the user to determine validity. For example, if a relatively long heating time is set with respect to a criterion described later, such as 1500 W and 10 minutes, for a volume of a regular rice ball sold at a convenience store, it is reasonable. It is determined that the heating time is not set.
  • a relatively long heating time is set with respect to a criterion described later, such as 1500 W and 10 minutes, for a volume of a regular rice ball sold at a convenience store, it is reasonable. It is determined that the heating time is not set.
  • This criterion may be defined by a function that represents the upper and lower limits of the appropriate range of the heating setting time with respect to the volume, or the volume is divided into several ranges, and the corresponding appropriate heating time range. May be defined in a table.
  • step S14 it is notified that the set heating time is not appropriate for the volume of the heating object 203, and the process is terminated without heating.
  • heating is prohibited when the comparison determination unit 302 determines that the heating time is not appropriate.
  • this is merely an example, and the operation content after the validity determination is described. It is not limited to this.
  • the heating itself may be performed only by notifying that it is not appropriate, or the heating may be stopped in the upper limit heating time corresponding to the volume of the heating target 203.
  • the present embodiment it is possible to estimate the volume of the heating object 203 from the size of the shadow region S extracted by combining images taken under a plurality of illumination conditions. . Moreover, even when a heating time that causes overheating is set by mistake with respect to the volume of the heating target 203, safety can be improved by a method such as prohibiting or limiting the heating. it can.
  • the volume is estimated from the shadow region S.
  • the height of the heating object 203 may be estimated from the length of the shadow region S. Specifically, for example, for the shadow region S, the length in the axial direction of illumination from the center of the heating object 203 is calculated as the length of the shadow region S. And the height of the heating object 203 can be estimated from the length and the angle between the axial direction of the illuminations 205a and 205b and the bottom surface of the heating chamber 201. By performing the imaging control and the heating control based on the estimated height of the heating object 203, the state recognition and heating in the heating chamber 201 can be more appropriately performed.
  • the heating cooker and the heating cooker control method of the present disclosure it is possible to perform heating under appropriate heating conditions by more accurately detecting the state in the cabinet, It is possible to prevent the danger of overheating of the. Moreover, even when there is dirt, it is possible to prompt the user to easily remove the food, and the user can cook the food in a clean and safe manner.
  • a heating cooking system such as a microwave oven or the like that can be connected to a network and a server on the network to control the heating cooking device.
  • a heating and cooking system both or one of the processes performed by the comparison determination unit 302 and the storage unit 304 in the microwave oven 100 of the first embodiment is executed on the server side. Thereby, the processing load by the recognition process etc. in a heating cooker can be reduced.
  • the present disclosure it is possible to accurately detect the state of the inside of the warehouse without being affected not only by the inside of the warehouse being empty but also by the presence or absence and the size of the dirt on the warehouse surface. Accordingly, the present invention can be widely applied to a heating cooker such as a microwave oven used in a store, a household microwave oven, a rice cooker, and an IH cooking heater, and is useful.
  • a heating cooker such as a microwave oven used in a store, a household microwave oven, a rice cooker, and an IH cooking heater, and is useful.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electric Ovens (AREA)
  • Image Analysis (AREA)

Abstract

L'invention concerne un appareil de cuisson à chauffage (100) comprenant un compartiment de chauffage (201) destiné à stocker un objet (203) à chauffer, un premier dispositif d'éclairage (205a) et un second dispositif d'éclairage (205b) destinés à éclairer l'intérieur du compartiment de chauffage (201), une unité d'imagerie (204) disposée au niveau du compartiment de chauffage (201), une unité de commande d'imagerie (303) destinée à capturer une image de l'intérieur du compartiment de chauffage (201) à l'aide de l'unité d'imagerie (204), et à produire une image, et une unité de commande de chauffage (301) destinée à chauffer l'intérieur du compartiment de chauffage (201). L'unité de commande d'imagerie (303) actionne l'unité d'imagerie (204), et le premier dispositif d'éclairage (205a) et/ou le second dispositif d'éclairage (205b), afin de capturer une première image ; et actionne l'unité d'imagerie (204), et le premier dispositif d'éclairage (205a) et/ou le second dispositif d'éclairage (205b), afin de capturer une seconde image. L'unité de commande de chauffage (301) chauffe l'intérieur du compartiment de chauffage (201) en fonction de la relation entre la première image et la seconde image.
PCT/JP2018/021301 2017-06-07 2018-06-04 Appareil de cuisson à chauffage et son procédé de commande WO2018225666A1 (fr)

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CN201880037302.2A CN110730887B (zh) 2017-06-07 2018-06-04 加热烹调器以及加热烹调器的控制方法
JP2019523514A JP7190632B2 (ja) 2017-06-07 2018-06-04 加熱調理器および加熱調理器の制御方法

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2022078839A1 (fr) * 2020-10-14 2022-04-21 Miele & Cie. Kg Procédé de détermination du temps de nettoyage d'une chambre de cuisson d'un appareil de cuisson
WO2022145612A1 (fr) * 2021-01-04 2022-07-07 엘지전자 주식회사 Appareil de cuisson et procédé de commande pour celui-ci

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JPS5946425A (ja) * 1982-09-10 1984-03-15 Toshiba Corp 加熱調理装置
JPS63259327A (ja) * 1987-04-14 1988-10-26 Matsushita Electric Ind Co Ltd 高周波加熱装置
JP2906454B2 (ja) * 1989-06-29 1999-06-21 松下電器産業株式会社 物体位置検出方法
US20120170247A1 (en) * 2011-01-05 2012-07-05 General Electric Company Method of using light-emitting diode (led) lighting to illuminate the interior of microwave ovens
JP2014202414A (ja) * 2013-04-04 2014-10-27 東芝ホームテクノ株式会社 加熱調理器
JP2016080211A (ja) * 2014-10-10 2016-05-16 パナソニックＩｐマネジメント株式会社 加熱調理器
JP2016179887A (ja) * 2015-03-24 2016-10-13 株式会社日立ビルシステム エレベーターかご内監視装置
WO2017170318A1 (fr) * 2016-03-29 2017-10-05 パナソニックＩｐマネジメント株式会社 Dispositif de cuisson

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DE10345352A1 (de) * 2003-09-18 2005-04-14 E.G.O. Elektro-Gerätebau GmbH Bedienvorrichtung und Bedienverfahren für ein elektrisches Haushaltsgerät
CN202281268U (zh) * 2011-06-24 2012-06-20 吴梓锋 可视微波炉

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5946425A (ja) * 1982-09-10 1984-03-15 Toshiba Corp 加熱調理装置
JPS63259327A (ja) * 1987-04-14 1988-10-26 Matsushita Electric Ind Co Ltd 高周波加熱装置
JP2906454B2 (ja) * 1989-06-29 1999-06-21 松下電器産業株式会社 物体位置検出方法
US20120170247A1 (en) * 2011-01-05 2012-07-05 General Electric Company Method of using light-emitting diode (led) lighting to illuminate the interior of microwave ovens
JP2014202414A (ja) * 2013-04-04 2014-10-27 東芝ホームテクノ株式会社 加熱調理器
JP2016080211A (ja) * 2014-10-10 2016-05-16 パナソニックＩｐマネジメント株式会社 加熱調理器
JP2016179887A (ja) * 2015-03-24 2016-10-13 株式会社日立ビルシステム エレベーターかご内監視装置
WO2017170318A1 (fr) * 2016-03-29 2017-10-05 パナソニックＩｐマネジメント株式会社 Dispositif de cuisson

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022078839A1 (fr) * 2020-10-14 2022-04-21 Miele & Cie. Kg Procédé de détermination du temps de nettoyage d'une chambre de cuisson d'un appareil de cuisson
WO2022145612A1 (fr) * 2021-01-04 2022-07-07 엘지전자 주식회사 Appareil de cuisson et procédé de commande pour celui-ci

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CN110730887B (zh) 2021-08-10
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