EP2242328A2 - Method for detecting cooking cutlery on a matrix hob - Google Patents

Method for detecting cooking cutlery on a matrix hob Download PDF

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Publication number
EP2242328A2
EP2242328A2 EP10158908A EP10158908A EP2242328A2 EP 2242328 A2 EP2242328 A2 EP 2242328A2 EP 10158908 A EP10158908 A EP 10158908A EP 10158908 A EP10158908 A EP 10158908A EP 2242328 A2 EP2242328 A2 EP 2242328A2
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EP
European Patent Office
Prior art keywords
cookware
elements
image
hob
matrix
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Granted
Application number
EP10158908A
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German (de)
French (fr)
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EP2242328A3 (en
EP2242328B1 (en
Inventor
Ignacio Garde Aranda
Javier Herrera Rodriguez
Daniel Palacios Tomas
Ramon Peinado Adiego
Carlos Sagües Blázquiz
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/03—Heating plates made out of a matrix of heating elements that can define heating areas adapted to cookware randomly placed on the heating plate
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
    • H05B2213/05—Heating plates with pan detection means

Definitions

  • the invention relates to a method for detecting cookware elements on a matrix hob according to the preamble of claim 1 and a matrix hob according to the preamble of claim 4.
  • an induction hob which comprises a detection arrangement for detecting a position and size of at least one cookware element and a control unit.
  • the control unit is configured to generate, using the inductors, an image of a bottom surface of a cookware element or a plurality of cookware elements mounted on the matrix hob.
  • the cookware element can be classified, for example, as an elongated or oval roasting pan or as a round cooking pot.
  • the control unit then summarizes a plurality of heating elements to a heating zone or a plurality of heating zones depending on a detected size and position of the cookware element.
  • the shape of the heating zone roughly corresponds to a basic form determined by the classification.
  • a hob that can detect and classify the shape of a cookware element for example, from DE 100 33 361 A1 known.
  • the control unit In the classification of cookware elements, the control unit relies on a limited repertoire of basic shapes and can therefore distinguish round cooking pots from oval fryers and rectangular pans. Difficulties arise in this approach, especially when several cookware elements are placed at a very close distance on the hob, so that the detection arrangement no longer records the cookware elements or their bottom surfaces as separate objects due to their limited spatial resolution, but as a contiguous area.
  • the obvious solution to this problem of providing a higher resolution detection device can not be realized with the inductors or heating elements of the hob and / or would normally be in which the cooking pots are placed at a significant distance from each other and a high resolution is therefore not necessary, too expensive.
  • the invention is in particular the object of providing a matrix cooktop and a method for detecting cookware elements on a matrix hob, which usually allows a separation of closely spaced cooking utensils without increased effort.
  • the invention is particularly based on a method for detecting cookware elements on a matrix hob.
  • the method includes generating a first image of a bottom surface of a cookware element or multiple cookware elements mounted on the matrix hob, and classifying a contiguous surface in the image of the bottom surface depending on the shape and / or size of the surface.
  • a pot separation algorithm be used to distinguish areas generated by a cookware element from areas created by two or more cookware elements. Since the pot separation algorithm is applied only after classification and only for certain results of the classification, the associated effort can be omitted in cases where this high cost would be inappropriate. As a result, tightly together cooking utensil elements can be safely separated without constantly having to perform a high-resolution detection and an elaborate pot separation.
  • Separate sensors or detectors can be dispensed with if the first image is generated by a detection arrangement that uses inductors of the hob as detectors.
  • the measurement data of the first image can be used by suitable image processing algorithms for a precise detection of the edges of the cookware elements.
  • an edge image of the contiguous surface is generated for separating area proportions, which are assigned to different cookware elements.
  • the first image can be generated by a dot matrix of measurement points in which each measurement point is assigned a measurement which is a parameter for a degree of coverage between the bottom surface of a cookware element and an environment of the measurement point.
  • the parameter may carry a higher information content if it is a non-binary value, in particular a percentage with one hundred or more possible values.
  • Another aspect of the invention relates to a cooktop having a plurality of heating elements, a detection arrangement for detecting a position and size of at least one cookware element and a control unit.
  • the control unit is configured to generate a first image of a bottom surface of a cookware element or multiple cookware elements positioned on the matrix hob to classify a contiguous surface in the image depending on the shape and / or size of the surface and depending on one detected size and position of the cooking utensil element to combine several heating elements to a heating zone or more heating zones.
  • control unit be adapted to apply, in at least one result of the classification, a pot separation algorithm to distinguish areas generated by a single cookware element from areas created by two or more cookware elements.
  • inventive method can be easily performed and the associated benefits can be fully utilized.
  • Separate sensors may be dispensed with if the heating elements are inductors and if the detection arrangement comprises the inductors for inductively detecting the cookware element.
  • the measured variables of the detection arrangement are each assigned to a measuring point on a hob surface, wherein the measuring points correspond to pixels of the first image.
  • a control unit 22 of the hob receives signals from a user interface 24, which also includes a display (not shown) and operates the inductors 10 depending on the settings made via the user interface 24.
  • a user may select a power level for each of the heating zones 16, 18 via the user interface 24. There are typically 16 to 18 different power level values available to the user.
  • the control unit 22 uses the inductors 10 for detecting the cooking pots 12, 14, so that the inductors 10 form a detection arrangement 26 together with the control unit 22.
  • the control unit 22 in particular can interconnect the inductors 10 with suitable capacitors to form a resonant circuit and generate an oscillating current by introducing a voltage pulse. From a decay of this current, the control unit 22 can calculate an attenuation constant. The greater the damping constant, the greater the degree of overlap between the respective inductor 10 and the cooking pot 12, 14.
  • other measuring methods may be used and / or separate sensors may be used.
  • Fig. 2 shows a cooktop with inductors 10 which are arranged in a skewed grid.
  • the grid has three translational symmetry directions, each at an angle of 60 ° to each other, so that three adjacent inductors 10 are each arranged in an equiangular triangle.
  • cooking hob shown are three cooking pots 12, 13, 14 arranged in different positions.
  • the cooking pots 12, 13, 14 have circular bottoms of identical diameter.
  • Each of the cooking pots 12, 13, 14 is associated with a group of inductors 19 which form a heating zone 16, 18, 20.
  • the control unit 22 of the hob usually assigns an inductor 10 then a particular saucepan 12, 13, 14, when the relevant inductor 10 is covered to more than half of the bottom of this cooking pot 12, 13, 14.
  • This rule occurs when, as in the in Fig. 2 illustrated situation, the cooking pots 12, 13, 14 can be clearly separated from each other in the coarse-meshed first image shown hatched. As in Fig. 2 This is evident in the case of the cooking pot 12 for seven inductors, while in the case of the cooking pots 13 and 14 six or eight inductors 10 are covered to more than 50% of the corresponding cooking pot 13, 14.
  • the heating powers of the heating zones 16, 18, 20 are determined by the control unit 22 as a product of the bottom surface of the corresponding cooking pot 12, 13, 14, a maximum surface heating power and a factor between 0 and 1, which is dependent on the power level set via the user interface ,
  • the value of this factor dependent on the power level is read by the control unit 22 from a table which is stored in a memory unit (not shown) of the control unit 22.
  • Fig. 3 schematically shows a situation in which two cooking pots 12, 14 were placed very close to each other on the hob, so that in connection with FIG. 2 rule described does not occur.
  • the inductors 10 are shown as square boxes and the more than 50% of a cooking pot 12, 14 covered inductors 10 are hatched and form in the in FIG. 3
  • the control unit In order to be able to operate the two cooking pots 12, 14 with heat outputs that can be determined independently of one another, the control unit must use the in coarse meshed first image shown in FIG FIG. 3 illustrated situation of situations in which only a single pan was placed on the hob.
  • Fig. 4 shows the situation Fig. 3 (or a similar situation), wherein each of the inductors 10 is assigned a percentage value, which forms a measured variable and which describes a degree of coverage of the respective inductor 10 through the bottom of one of the cooking pots 12, 14.
  • the quantity or the field of the percentages forms the first image of the bottoms of the cooking pots, whereby the percentage values can be interpreted as gray values and the measurement points as pixels of the image.
  • the more than 50% of a cooking pot 12, 14 covered inductors 10 are shown hatched. From the hatched area alone, it is obviously difficult to read whether the cookware element placed on the hob is a single pot (possibly a roasting pan) or two pots.
  • Fig. 4 Simple algorithms that have a centroid of in Fig. 4 determine hatched area and would calculate a radius of the heating zone depending on a total area of the hatched area, would result in an obviously inadequate result Fig. 4 is shown as a dashed circle. Even a simple summation of the degrees of coverage would not allow a distinction between the two cooking pots 12, 14. A heating zone described by the dashed circle would not sufficiently heat any of the saucepans 12, 14 and would not allow independent power control of the two cooking pots 12, 14 either.
  • the control unit 22 determines from the in Fig. 4 a contiguous surface 28 of pixels (in Fig. 4 hatched), which are covered by a bottom surface of one of the cooking pots 12, 14. Subsequently, the control unit 22 determines characteristics for characterizing the contiguous area. When forming the characteristic quantities, the individual meshes or partial surfaces can be weighted with the measured values or the degree of coverage. Alternatively, the control unit 22 may calculate a development on an orthogonal function system on the two-dimensional plane. The parameters are used by the control unit 22, oval roasters of round pots and the in Fig. 4 and 5 be distinguished situation with two closely spaced pots.
  • control unit 22 can recognize that the surface 28 is likely to represent the bottoms of two different cooking pots 12, 14. The control unit 22 then classifies the first image accordingly as two cooking pots 12, 14. To the related Area 28, all pixels are summarized which have a non-zero coverage or a coverage that exceeds a predetermined threshold, and in addition have at least one adjacent pixel that also meets this criterion.
  • the measured variables determined by the detection arrangement 26 are used as parameters of a pot separation algorithm which uses methods from digital image processing.
  • the gray value image may ultimately be mapped to a binary image in which the image values are binary variables that indicate whether or not a bottom surface of a cookware element covers the pixel. In doing so, the in FIG. 4 percentages interpreted as gray values.
  • the control unit 22 may further determine an edge image of the contiguous area 28 of pixels, wherein a per se known edge detection method may be used. As a result, in particular the situation with two cooking pots 12, 14 can be distinguished from a situation with an elongated pot.
  • the pots 12, 14 can be separated from each other and the control unit 22 can, as in Fig. 5 represented each of the cooking pots 12, 14 assign a separate heating zone 16, 18.
  • the bottom surface of the saucepans 12, 14 can also be easily determined after separating the cooking pots 12, 14, for example, as the area of the in Fig. 5 illustrated circles.
  • the heating zones 16, 18 defined in this way are then assigned by the control unit 22 in each case to different groups of inductors 10, which generate the heat output of the respective heating zone 16, 18. This assignment is shown in FIG. Inducers 10, which are overlapped by both heating zones 16, 18, remain inactive.
  • the control unit 22 determines for each of the heating zones 16, 18 a heating power in the manner described above and operates the corresponding heating zone 16, 18 associated inductors 10 so that in the sum of a certain total heating power is generated. These Total heating power is calculated by the control unit 22 for each active heating zone 16, 18 in the manner described above depending on the bottom surface of the cooking pots 12, 14 and depending on the power level set for the respective heating zone 16, 18.
  • the control unit 22 assigns the detected cooking pot 12, 14 to one of the categories “round”, “oval”, “rectangular” and determines in an optimization method the parameters of the respective geometric shape so that the covered area is best described , In the case of round pots, the control unit determines the radius and calculates the floor area from the radius.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Electric Stoves And Ranges (AREA)
  • Baking, Grill, Roasting (AREA)
  • Frying-Pans Or Fryers (AREA)
  • Cookers (AREA)

Abstract

Die Erfindung geht aus von einem Verfahren zum Detektieren von Kochgeschirrelementen (12, 14) auf einem Matrix-Kochfeld. Das Verfahren umfasst das Erzeugen einer ersten Abbildung einer Bodenfläche eines Kochgeschirrelements oder mehrerer Kochgeschirrelemente (12, 14), die auf das Matrix-Kochfeld aufgestellt sind, und das Klassifizieren einer zusammenhängenden Fläche (28) in der Abbildung der Bodenfläche abhängig von der Form und/oder Größe der Fläche (28). Um eng zusammen stehende Kochgeschirrelemente separieren zu können, ohne den zur Detektion einzelner Kochgeschirrelemente (12, 14) nötigen Aufwand maßgeblich zu erhöhen, wird vorgeschlagen, dass bei zumindest einem Ergebnis der Klassifizierung ein Topfseparationsalgorithmus angewandt wird, um Flächen, die von einem einzigen Kochgeschirrelement erzeugt sind, von solchen Flächen (28) zu unterschieden, die von zwei oder mehreren Kochgeschirrelementen (12, 14) erzeugt sind.The invention is based on a method for detecting cookware elements (12, 14) on a matrix hob. The method comprises producing a first image of a bottom surface of a cookware element or multiple cookware elements (12, 14) placed on the matrix hob, and classifying a contiguous surface (28) in the image of the bottom surface depending on the shape and / or size of the area (28). In order to be able to separate closely spaced cookware elements without significantly increasing the effort required to detect individual cookware elements (12, 14), it is proposed that at least one result of the classification use a pot separation algorithm to produce areas created by a single cookware element are to be distinguished from those surfaces (28) produced by two or more cookware elements (12, 14).

Description

Die Erfindung betrifft ein Verfahren zum Detektieren von Kochgeschirrelementen auf einem Matrix-Kochfeld nach dem Oberbegriff des Anspruchs 1 und ein Matrix-Kochfeld nach dem Oberbegriff des Anspruchs 4.The invention relates to a method for detecting cookware elements on a matrix hob according to the preamble of claim 1 and a matrix hob according to the preamble of claim 4.

Aus der WO 2005/064992 A1 ein Induktionskochfeld bekannt, das eine Detektionsanordnung zum Detektieren einer Position und Größe wenigstens eines Kochgeschirrelements und eine Steuereinheit umfasst. Die Steuereinheit ist dazu ausgelegt, unter Verwendung der Induktoren eine Abbildung einer Bodenfläche eines Kochgeschirrelements oder mehrerer Kochgeschirrelemente zu erzeugen, die auf das Matrix-Kochfeld aufgestellt sind.From the WO 2005/064992 A1 an induction hob is known, which comprises a detection arrangement for detecting a position and size of at least one cookware element and a control unit. The control unit is configured to generate, using the inductors, an image of a bottom surface of a cookware element or a plurality of cookware elements mounted on the matrix hob.

Ferner ist es aus dem Stand der Technik bekannt, eine zusammenhängende Fläche in der Abbildung der Bodenfläche abhängig von der Form und/oder Größe der Fläche zu klassifizieren. Das Kochgeschirrelement kann beispielsweise als länglicher oder ovaler Bräter oder als runder Kochtopf klassifiziert werden. Die Steuereinheit fasst dann abhängig von einer detektierten Größe und Position des Kochgeschirrelements mehrere Heizelemente zu einer Heizzone oder mehreren Heizzonen zusammen. Die Form der Heizzone entspricht grob einer durch die Klassifikation ermittelten Grundform. Ein Kochfeld, das die Form eines Kochgeschirrelements detektieren und klassifizieren kann, ist beispielsweise aus der DE 100 33 361 A1 bekannt.Furthermore, it is known from the prior art to classify a contiguous area in the image of the floor area depending on the shape and / or size of the area. The cookware element can be classified, for example, as an elongated or oval roasting pan or as a round cooking pot. The control unit then summarizes a plurality of heating elements to a heating zone or a plurality of heating zones depending on a detected size and position of the cookware element. The shape of the heating zone roughly corresponds to a basic form determined by the classification. A hob that can detect and classify the shape of a cookware element, for example, from DE 100 33 361 A1 known.

Bei der Klassifizierung der Kochgeschirrelemente greift die Steuereinheit auf ein begrenztes Repertoire von Grundformen zurück und kann demnach runde Kochtöpfe von ovalen Brätern und von rechteckigen Pfannen unterscheiden. Schwierigkeiten ergeben sich bei dieser Herangehensweise insbesondere dann, wenn mehrere Kochgeschirrelemente in einem sehr engen Abstand auf das Kochfeld aufgestellt werden, so dass die Detektionsanordnung aufgrund ihrer begrenzten räumlichen Auflösung die Kochgeschirrelemente bzw. deren Bodenflächen nicht mehr als getrennte Objekte aufzeichnet, sondern als zusammenhängende Fläche. Die nahe liegende Lösung für dieses Problem, eine hochauflösendere Detektionsvorrichtung bereitzustellen, kann nicht mit den Induktoren bzw. Heizelementen des Kochfelds realisiert werden und/oder wäre im Regelfall, in dem die Kochtöpfe in einem deutlichen Abstand voneinander aufgestellt sind und eine hohe Auflösung daher nicht nötig ist, zu aufwendig.In the classification of cookware elements, the control unit relies on a limited repertoire of basic shapes and can therefore distinguish round cooking pots from oval fryers and rectangular pans. Difficulties arise in this approach, especially when several cookware elements are placed at a very close distance on the hob, so that the detection arrangement no longer records the cookware elements or their bottom surfaces as separate objects due to their limited spatial resolution, but as a contiguous area. The obvious solution to this problem of providing a higher resolution detection device can not be realized with the inductors or heating elements of the hob and / or would normally be in which the cooking pots are placed at a significant distance from each other and a high resolution is therefore not necessary, too expensive.

Der Erfindung liegt insbesondere die Aufgabe zugrunde, ein Matrix-Kochfeld und ein Verfahren zum Detektieren von Kochgeschirrelementen auf einem Matrix-Kochfeld bereitzustellen, das ohne erhöhten Aufwand im Regelfall eine Separation von eng beieinander stehenden Kochgeschirrelementen erlaubt.The invention is in particular the object of providing a matrix cooktop and a method for detecting cookware elements on a matrix hob, which usually allows a separation of closely spaced cooking utensils without increased effort.

Die Aufgabe wird durch die Merkmale der unabhängigen Patentansprüche gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.The object is solved by the features of the independent claims. Advantageous embodiments and modifications of the invention will become apparent from the dependent claims.

Die Erfindung geht insbesondere aus von einem Verfahren zum Detektieren von Kochgeschirrelementen auf einem Matrix-Kochfeld. Das Verfahren umfasst das Erzeugen einer ersten Abbildung einer Bodenfläche eines Kochgeschirrelements oder mehrerer Kochgeschirrelemente, die auf das Matrix-Kochfeld aufgestellt sind, und das Klassifizieren einer zusammenhängenden Fläche in der Abbildung der Bodenfläche abhängig von der Form und/oder Größe der Fläche.The invention is particularly based on a method for detecting cookware elements on a matrix hob. The method includes generating a first image of a bottom surface of a cookware element or multiple cookware elements mounted on the matrix hob, and classifying a contiguous surface in the image of the bottom surface depending on the shape and / or size of the surface.

Es wird vorgeschlagen, dass bei zumindest einem Ergebnis der Klassifizierung ein Topfseparationsalgorithmus angewandt wird, um Flächen, die von einem Kochgeschirrelement erzeugt sind, von Flächen zu unterscheiden, die von zwei oder mehreren Kochgeschirrelementen erzeugt sind. Da der Topfseparationsalgorithmus erst nach der Klassifizierung und nur bei bestimmten Ergebnissen der Klassifikation angewandt wird, kann der damit verbundene Aufwand in Fällen entfallen, in denen dieser hohe Aufwand unangebracht wäre. Dadurch können eng zusammenstehende Kochgeschirrelemente sicher separiert werden, ohne dass ständig eine hochaufgelöste Detektion und eine aufwändige Topfseparation erfolgen muss.It is suggested that in at least one result of the classification, a pot separation algorithm be used to distinguish areas generated by a cookware element from areas created by two or more cookware elements. Since the pot separation algorithm is applied only after classification and only for certain results of the classification, the associated effort can be omitted in cases where this high cost would be inappropriate. As a result, tightly together cooking utensil elements can be safely separated without constantly having to perform a high-resolution detection and an elaborate pot separation.

Auf separate Sensoren oder Detektoren kann verzichtet werden, wenn die erste Abbildung von einer Detektionsanordnung erzeugt wird, die Induktoren des Kochfelds als Detektoren nutzt.Separate sensors or detectors can be dispensed with if the first image is generated by a detection arrangement that uses inductors of the hob as detectors.

In einer besonders vorteilhaften Ausgestaltung der Erfindung wird vorgeschlagen, dass zum Klassifizieren der zusammenhängenden Fläche bekannte Verfahren aus der digitalen Bildverarbeitung verwendet werden. Die Messdaten der ersten Abbildung können von geeigneten Bildverarbeitungsalgorithmen zu einer präzisen Detektion der Kanten der Kochgeschirrelemente genutzt werden.In a particularly advantageous embodiment of the invention, it is proposed that methods known from digital image processing are used to classify the contiguous area. The measurement data of the first image can be used by suitable image processing algorithms for a precise detection of the edges of the cookware elements.

In einer besonders vorteilhaften Ausgestaltung der Erfindung wird zum Trennen von Flächenanteilen, die unterschiedlichen Kochgeschirrelementen zugeordnet sind, ein Randbild der zusammenhängenden Fläche erzeugt.In a particularly advantageous embodiment of the invention, an edge image of the contiguous surface is generated for separating area proportions, which are assigned to different cookware elements.

Die erste Abbildung kann insbesondere durch ein Punktraster von Messpunkten erzeugt werden, in dem jedem Messpunkt ein Messwert zugeordnet wird, der eine Kenngröße für einen Überdeckungsgrad zwischen der Bodenfläche eines Kochgeschirrelements und einer Umgebung des Messpunkts ist. Die Kenngröße kann einen höheren Informationsgehalt tragen, wenn sie eine nicht-binärwertige Kenngröße ist, insbesondere ein Prozentwert mit hundert oder mehr möglichen Werten.In particular, the first image can be generated by a dot matrix of measurement points in which each measurement point is assigned a measurement which is a parameter for a degree of coverage between the bottom surface of a cookware element and an environment of the measurement point. The parameter may carry a higher information content if it is a non-binary value, in particular a percentage with one hundred or more possible values.

Ein weiterer Aspekt der Erfindung betrifft ein Kochfeld mit einer Vielzahl von Heizelementen, einer Detektionsanordnung zum Detektieren einer Position und Größe wenigstens eines Kochgeschirrelements und einer Steuereinheit. Die Steuereinheit ist dazu ausgelegt, eine erste Abbildung einer Bodenfläche eines Kochgeschirrelements oder mehrerer Kochgeschirrelemente zu erzeugen, die auf das Matrix-Kochfeld aufgestellt sind, eine zusammenhängende Fläche in der Abbildung abhängig von der Form und/oder Größe der Fläche zu klassifizieren und abhängig von einer detektierten Größe und Position des Kochgeschirrelements mehrere Heizelemente zu einer Heizzone oder mehreren Heizzonen zusammenzufassen.Another aspect of the invention relates to a cooktop having a plurality of heating elements, a detection arrangement for detecting a position and size of at least one cookware element and a control unit. The control unit is configured to generate a first image of a bottom surface of a cookware element or multiple cookware elements positioned on the matrix hob to classify a contiguous surface in the image depending on the shape and / or size of the surface and depending on one detected size and position of the cooking utensil element to combine several heating elements to a heating zone or more heating zones.

Es wird vorgeschlagen, dass die Steuereinheit dazu ausgelegt ist, bei zumindest einem Ergebnis der Klassifizierung ein Topfseparationsalgorithmus angewandt wird, um Flächen, die von einem einzigen Kochgeschirrelement erzeugt sind, von Flächen zu unterscheiden, die von zwei oder mehreren Kochgeschirrelementen erzeugt sind. Damit kann das erfindungsgemäße Verfahren einfach ausgeführt werden und die damit verbundenen Vorteile können voll ausgeschöpft werden.It is proposed that the control unit be adapted to apply, in at least one result of the classification, a pot separation algorithm to distinguish areas generated by a single cookware element from areas created by two or more cookware elements. Thus, the inventive method can be easily performed and the associated benefits can be fully utilized.

Auf separate Sensoren kann verzichtet werden, wenn die Heizelemente Induktoren sind und wenn die Detektionsanordnung die Induktoren umfasst, um das Kochgeschirrelement induktiv zu detektieren.Separate sensors may be dispensed with if the heating elements are inductors and if the detection arrangement comprises the inductors for inductively detecting the cookware element.

In einer Weiterbildung der Erfindung wird vorgeschlagen, dass die Messgrößen der Detektionsanordnung jeweils einem Messpunkt auf einer Kochfeldoberfläche zugeordnet sind, wobei die Messpunkte Pixeln der ersten Abbildung entsprechen.In one development of the invention, it is proposed that the measured variables of the detection arrangement are each assigned to a measuring point on a hob surface, wherein the measuring points correspond to pixels of the first image.

Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Es zeigen:

Fig. 1
ein Kochfeld mit einer Matrix von Heizelementen und mit zwei Koch- töpfen,
Fig. 2
eine Draufsicht eines Kochfelds mit drei gleich großen Kochtöpfen in unterschiedlichen Positionen, denen jeweils eine Heizzone zuge- ordnet ist,
Fig. 3
eine schematische Darstellung eines Kochfelds mit zwei eng bei- einander stehenden Kochtöpfen und einer ersten Abbildung von Bodenflächen dieser Kochtöpfe,
Fig. 4
eine schematische Darstellung der ersten Abbildung der zwei eng beieinander stehenden Kochtöpfe mit jeweils angegebenen Mess- größen, und
Fig. 5
eine schematische Darstellung zur Zuordnung von Heizelementen zu den verschiedenen Kochtöpfen in der in Fig. 4 dargestellten Si- tuation.
Fig. 1 zeigt schematisch ein Kochfeld mit einer Vielzahl von als Induktoren 10 ausgebildeten Heizelementen, die in einem Raster angeordnet sind. Auf dem Kochfeld sind zwei Kochgeschirrelemente, und zwar zwei Kochtöpfe 12, 14, angeordnet, wobei der erste Kochtopf 12 fünf Induktoren 10 größtenteils überdeckt, während der zweite Kochtopf 14 einen kleinen Topfdurchmesser hat und nur einen Induktor 10 vollständig überdeckt. Die von den jeweiligen Kochtöpfen 12, 14 zum größten Teil überdeckten Induktoren 10 bilden jeweils eine dem entsprechenden Kochtopf 12, 14 zugeordnete Heizzone 16, 18.Show it:
Fig. 1
a hob with a matrix of heating elements and with two cooking pots,
Fig. 2
a top view of a cooktop with three cooking pots of equal size in different positions, to each of which a heating zone is assigned,
Fig. 3
a schematic representation of a hob with two closely spaced cooking pots and a first image of the bottom surfaces of these cooking pots,
Fig. 4
a schematic representation of the first image of the two closely spaced cooking pots, each with specified measured variables, and
Fig. 5
a schematic representation of the assignment of heating elements to the various cooking pots in the in Fig. 4 presented situation.
Fig. 1 schematically shows a cooktop with a plurality of heating elements formed as inductors 10, which are arranged in a grid. On the hob are two cookware elements, namely two cooking pots 12, 14, arranged, wherein the first cooking pot 12 five inductors 10 largely covers, while the second cooking pot 14 has a small pot diameter and only one inductor 10 completely covered. The inductors 10 largely covered by the respective cooking pots 12, 14 each form a heating zone 16, 18 assigned to the corresponding cooking pot 12, 14.

Eine Steuereinheit 22 des Kochfelds empfängt Signale von einer Benutzerschnittstelle 24, die auch ein Display umfasst (nicht dargestellt) und betreibt die Induktoren 10 abhängig von den über die Benutzerschnittstelle 24 vorgenommenen Einstellungen. Insbesondere kann ein Benutzer über die Benutzerschnittstelle 24 für jede der Heizzonen 16, 18 eine Leistungsstufe wählen. Dabei stehen dem Benutzer typischerweise 16 bis 18 verschiedene Werte für die Leistungsstufen zur Verfügung.A control unit 22 of the hob receives signals from a user interface 24, which also includes a display (not shown) and operates the inductors 10 depending on the settings made via the user interface 24. In particular, a user may select a power level for each of the heating zones 16, 18 via the user interface 24. There are typically 16 to 18 different power level values available to the user.

Die Steuereinheit 22 nutzt die Induktoren 10 zum Detektieren der Kochtöpfe 12, 14, so dass die Induktoren 10 zusammen mit der Steuereinheit 22 eine Detektionsanordnung 26 bilden. Zum Detektieren der Kochtöpfe 12, 14 kann die Steuereinheit 22 insbesondere die Induktoren 10 mit geeigneten Kondensatoren zu einem Schwingkreis verschalten und durch das Einleiten eines Spannungspulses eine oszillierenden Strom erzeugen. Aus einem Abklingen dieses Stroms kann die Steuereinheit 22 eine Dämpfungskonstante berechnen. Je größer die Dämpfungskonstante ist, desto stärker ist ein Überdeckungsgrad zwischen dem betreffenden Induktor 10 und dem Kochtopf 12, 14. In alternativen Ausgestaltungen der Erfindung können andere Messverfahren verwendet werden und/oder separate Sensoren zum Einsatz kommen.The control unit 22 uses the inductors 10 for detecting the cooking pots 12, 14, so that the inductors 10 form a detection arrangement 26 together with the control unit 22. In order to detect the cooking pots 12, 14, the control unit 22 in particular can interconnect the inductors 10 with suitable capacitors to form a resonant circuit and generate an oscillating current by introducing a voltage pulse. From a decay of this current, the control unit 22 can calculate an attenuation constant. The greater the damping constant, the greater the degree of overlap between the respective inductor 10 and the cooking pot 12, 14. In alternative embodiments of the invention, other measuring methods may be used and / or separate sensors may be used.

Fig. 2 zeigt ein Kochfeld mit Induktoren 10, die in einem schiefwinkligen Raster angeordnet sind. Das Raster hat drei Translations-Symmetrierichtungen, die jeweils in einem Winkel von 60° zueinander verlaufen, so dass drei benachbarte Induktoren 10 jeweils in einem gleichwinkligen Dreieck angeordnet sind. In dem in Fig. 2 dargestellten Kochfeld sind drei Kochtöpfe 12, 13, 14 in unterschiedlichen Positionen angeordnet. Die Kochtöpfe 12, 13, 14 haben kreisförmige Böden mit identischem Durchmesser. Jedem der Kochtöpfe 12, 13, 14 ist eine Gruppe von Induktoren 19 zugeordnet, die eine Heizzone 16, 18, 20 bilden. Fig. 2 shows a cooktop with inductors 10 which are arranged in a skewed grid. The grid has three translational symmetry directions, each at an angle of 60 ° to each other, so that three adjacent inductors 10 are each arranged in an equiangular triangle. In the in Fig. 2 cooking hob shown are three cooking pots 12, 13, 14 arranged in different positions. The cooking pots 12, 13, 14 have circular bottoms of identical diameter. Each of the cooking pots 12, 13, 14 is associated with a group of inductors 19 which form a heating zone 16, 18, 20.

Die Steuereinheit 22 des Kochfelds ordnet im Regelfall einen Induktor 10 dann einem bestimmten Kochtopf 12, 13, 14 zu, wenn der betreffende Induktor 10 zu mehr als der Hälfte von dem Boden dieses Kochtopfes 12, 13, 14 bedeckt ist. Dieser Regelfall tritt dann ein, wenn wie in der in Fig. 2 dargestellten Situation die Kochtöpfe 12, 13, 14 auch in der schraffiert dargestellten grobmaschigen ersten Abbildung klar voneinander getrennt werden können. Wie in Fig. 2 erkennbar, ist dies im Falle des Kochtopfes 12 für sieben Induktoren zutreffend, während im Falle der Kochtöpfe 13 und 14 sechs bzw. acht Induktoren 10 zu mehr als 50 % von dem entsprechenden Kochtopf 13, 14 überdeckt werden.The control unit 22 of the hob usually assigns an inductor 10 then a particular saucepan 12, 13, 14, when the relevant inductor 10 is covered to more than half of the bottom of this cooking pot 12, 13, 14. This rule occurs when, as in the in Fig. 2 illustrated situation, the cooking pots 12, 13, 14 can be clearly separated from each other in the coarse-meshed first image shown hatched. As in Fig. 2 This is evident in the case of the cooking pot 12 for seven inductors, while in the case of the cooking pots 13 and 14 six or eight inductors 10 are covered to more than 50% of the corresponding cooking pot 13, 14.

Um auch in der Fig. 2 dargestellten Situation eine gleiche Heizleistung für alle drei Kochtöpfe 12, 13, 14 zu erreichen, bestimmt die Steuereinheit 22 durch einen geeigneten Algorithmus nicht nur die Anzahl der zu der jeweiligen Heizzone 16, 18, 20 zusammengefassten Induktoren 10, sondern auch mit einer Genauigkeit, die größer als die durch das Abzählen der Induktoren 10 erreichbare Genauigkeit ist, die Bodenfläche der Kochtöpfe 12, 13, 14.To be in the Fig. 2 shown situation to achieve an equal heating power for all three cooking pots 12, 13, 14, determines the control unit 22 by a suitable algorithm not only the number of combined to the respective heating zone 16, 18, 20 inductors 10, but also with an accuracy that greater than the achievable by the counting of the inductors 10 accuracy is the bottom surface of the cooking pots 12, 13, 14th

Die Heizleistungen der Heizzonen 16, 18, 20 werden von der Steuereinheit 22 als Produkt aus der Bodenfläche des entsprechenden Kochtopfs 12, 13, 14, einer maximalen Flächenheizleistung und einem Faktor zwischen 0 und 1 bestimmt, der abhängig von der über die Benutzerschnittstelle eingestellten Leistungsstufe ist. Der Wert dieses von der Leistungsstufe abhängigen Faktors wird von der Steuereinheit 22 aus einer Tabelle gelesen, die in einer Speichereinheit (nicht dargestellt) der Steuereinheit 22 abgelegt ist.The heating powers of the heating zones 16, 18, 20 are determined by the control unit 22 as a product of the bottom surface of the corresponding cooking pot 12, 13, 14, a maximum surface heating power and a factor between 0 and 1, which is dependent on the power level set via the user interface , The value of this factor dependent on the power level is read by the control unit 22 from a table which is stored in a memory unit (not shown) of the control unit 22.

Fig. 3 zeigt schematisch eine Situation, in welcher zwei Kochtöpfe 12, 14 sehr dicht beieinander auf das Kochfeld aufgestellt wurden, so dass der im Zusammenhang mit Figur 2 beschriebene Regelfall nicht eintritt. Die Induktoren 10 sind als quadratische Kästchen dargestellt und die zu mehr als 50 % von einem Kochtopf 12, 14 überdeckten Induktoren 10 sind schraffiert und bilden in der in Figur 3 schraffiert dargestellten, grobmaschigen ersten Abbildung eine zusammenhängende Fläche 28. Um die beiden Kochtöpfe 12, 14 mit unabhängig voneinander bestimmbaren Heizleistungen betreiben zu können, muss die Steuereinheit die in Figur 3 dargestellte Situation von Situationen unterscheiden können, in denen nur ein einziger Kochtopf auf das Kochfeld aufgestellt wurde. Fig. 3 schematically shows a situation in which two cooking pots 12, 14 were placed very close to each other on the hob, so that in connection with FIG. 2 rule described does not occur. The inductors 10 are shown as square boxes and the more than 50% of a cooking pot 12, 14 covered inductors 10 are hatched and form in the in FIG. 3 In order to be able to operate the two cooking pots 12, 14 with heat outputs that can be determined independently of one another, the control unit must use the in coarse meshed first image shown in FIG FIG. 3 illustrated situation of situations in which only a single pan was placed on the hob.

Fig. 4 zeigt die Situation aus Fig. 3 (bzw. eine ähnliche Situation), wobei jedem der Induktoren 10 ein Prozentwert zugeordnet ist, der eine Messgröße bildet und der einen Überdeckungsgrad des betreffenden Induktors 10 durch den Boden eines der Kochtöpfe 12, 14 beschreibt. Die Menge bzw. das Feld der Prozentwerte bildet die erste Abbildung der Böden der Kochtöpfe, wobei die Prozentwerte als Grauwerte und die Messpunkte als Pixel der Abbildung interpretiert werden können. Die zu mehr als 50 % von einem Kochtopf 12, 14 überdeckten Induktoren 10 sind schraffiert dargestellt. Aus der schraffierten Fläche allein ist es offensichtlich schwierig zu abzulesen, ob es sich bei dem auf das Kochfeld aufgestellten Kochgeschirrelement um einen einzigen Topf (möglicherweise einen Bräter) oder um zwei Töpfe handelt. Fig. 4 shows the situation Fig. 3 (or a similar situation), wherein each of the inductors 10 is assigned a percentage value, which forms a measured variable and which describes a degree of coverage of the respective inductor 10 through the bottom of one of the cooking pots 12, 14. The quantity or the field of the percentages forms the first image of the bottoms of the cooking pots, whereby the percentage values can be interpreted as gray values and the measurement points as pixels of the image. The more than 50% of a cooking pot 12, 14 covered inductors 10 are shown hatched. From the hatched area alone, it is obviously difficult to read whether the cookware element placed on the hob is a single pot (possibly a roasting pan) or two pots.

Einfache Algorithmen, die einen Flächenschwerpunkt der in Fig. 4 dargestellten schraffierten Fläche bestimmen und abhängig von einer Gesamtfläche der schraffierten Fläche einen Radius der Heizzone berechnen würden, kämen zu einem offensichtlich unzulänglichen Ergebnis, das in Fig. 4 als gestrichelter Kreis dargestellt ist. Auch eine einfache Summation der Überdeckungsgrade würde eine Unterscheidung der beiden Kochtöpfe 12, 14 nicht erlauben. Eine durch den gestrichelten Kreis beschriebene Heizzone würde keinen der Kochtöpfe 12, 14 ausreichend beheizen und auch eine unabhängige Leistungsregelung der beiden Kochtöpfe 12, 14 nicht ermöglichen.Simple algorithms that have a centroid of in Fig. 4 determine hatched area and would calculate a radius of the heating zone depending on a total area of the hatched area, would result in an obviously inadequate result Fig. 4 is shown as a dashed circle. Even a simple summation of the degrees of coverage would not allow a distinction between the two cooking pots 12, 14. A heating zone described by the dashed circle would not sufficiently heat any of the saucepans 12, 14 and would not allow independent power control of the two cooking pots 12, 14 either.

Zur Klassifikation der ersten Abbildung bestimmt die Steuereinheit 22 aus der in Fig. 4 dargestellten ersten Abbildung eine zusammenhängende Fläche 28 von Bildpunkten (in Fig. 4 schraffiert dargestellt), die von einer Bodenfläche von einem der Kochtöpfe 12, 14 überdeckt sind. Anschließend bestimmt die Steuereinheit 22 Kenngrößen zum Charakterisieren der zusammenhängenden Fläche. Bei der Bildung der Kenngrößen können die einzelnen Maschen bzw. Teilflächen mit den Messwerten bzw. dem Überdeckungsgrad gewichtet werden. Alternativ kann die Steuereinheit 22 eine Entwicklung nach einem orthogonalen Funktionensystem auf der zweidimensionalen Ebene berechnen. Die Kenngrößen werden von der Steuereinheit 22 dazu genutzt, ovale Bräter von runden Töpfen und von der in Fig. 4 und 5 dargestellten Situation mit zwei eng beieinander stehenden Töpfen zu unterscheiden. Insbesondere kann die Steuereinheit 22 durch eine geeignete Wahl dieser Kenngrößen erkennen, dass die Fläche 28 wahrscheinlich die Böden von zwei verschiedenen Kochtöpfen 12, 14 darstellt. Die Steuereinheit 22 klassifiziert die erste Abbildung dann entsprechend als zwei Kochtöpfe 12, 14 darstellend. Zu der zusammenhängenden Fläche 28 werden alle Pixel zusammengefasst, die einen von Null verschiedenen Überdeckungsgrad oder einen Überdeckungsgrad haben, der einen vorgegebenen Grenzwert übertrifft, und die zusätzlich wenigstens ein benachbartes Pixel haben, das dieses Kriterium ebenfalls erfüllt.For the classification of the first image, the control unit 22 determines from the in Fig. 4 a contiguous surface 28 of pixels (in Fig. 4 hatched), which are covered by a bottom surface of one of the cooking pots 12, 14. Subsequently, the control unit 22 determines characteristics for characterizing the contiguous area. When forming the characteristic quantities, the individual meshes or partial surfaces can be weighted with the measured values or the degree of coverage. Alternatively, the control unit 22 may calculate a development on an orthogonal function system on the two-dimensional plane. The parameters are used by the control unit 22, oval roasters of round pots and the in Fig. 4 and 5 be distinguished situation with two closely spaced pots. In particular, by a suitable choice of these characteristics, the control unit 22 can recognize that the surface 28 is likely to represent the bottoms of two different cooking pots 12, 14. The control unit 22 then classifies the first image accordingly as two cooking pots 12, 14. To the related Area 28, all pixels are summarized which have a non-zero coverage or a coverage that exceeds a predetermined threshold, and in addition have at least one adjacent pixel that also meets this criterion.

Wenn eine derartige Klassifikation erfolgt ist, werden die von der Detektionsanordnung 26 bestimmten Messgrößen als Parameter eines Topfseparationsalgorithmus genutzt, der Methoden aus der digitalen Bildverarbeitung verwendet.If such a classification has taken place, the measured variables determined by the detection arrangement 26 are used as parameters of a pot separation algorithm which uses methods from digital image processing.

Durch an sich bekannte Bildverarbeitungsverfahren können die Kanten der Kochtöpfe 12, 14 in dem in Figur 4 dargstellten Grauwert-Bild detektiert werden und das Grauwert-Bild kann letztlich auf ein binärwertiges Bild abgebildet werden, in welchem die Bildwerte binäre Variablen sind, die angeben, ob eine Bodenfläche eines Kochgeschirrelements den Bildpunkt überdeckt oder nicht. Dabei werden die in Figur 4 dargestellten Prozentwerte als Grauwerte interpretiert. Die Steuereinheit 22 kann ferner ein Randbild der zusammenhängenden Fläche 28 von Bildpunkten bestimmen, wobei ein an sich bekanntes Kanten-Detektionsverfahren verwendet werden kann. Dadurch kann insbesondere die Situation mit zwei Kochtöpfen 12, 14 von einer Situation mit einem länglichen Topf unterschieden werden.By known image processing methods, the edges of the cooking pots 12, 14 in the in FIG. 4 The gray value image may ultimately be mapped to a binary image in which the image values are binary variables that indicate whether or not a bottom surface of a cookware element covers the pixel. In doing so, the in FIG. 4 percentages interpreted as gray values. The control unit 22 may further determine an edge image of the contiguous area 28 of pixels, wherein a per se known edge detection method may be used. As a result, in particular the situation with two cooking pots 12, 14 can be distinguished from a situation with an elongated pot.

Durch die Anwendung eines geeigneten Separationsalgorithmus (der beispielsweise auf dem Erkennen von Symmetrien beruhen kann) können die Töpfe 12, 14 voneinander getrennt werden und die Steuereinheit 22 kann wie in Fig. 5 dargestellt jedem der Kochtöpfe 12, 14 eine eigene Heizzone 16, 18 zuordnen. Die Bodenfläche der Kochtöpfe 12, 14 kann nach dem Separieren der Kochtöpfe 12, 14 ebenfalls einfach bestimmt werden, beispielsweise als die Fläche der in Fig. 5 dargestellten Kreise.By using a suitable separation algorithm (which may for example be based on the detection of symmetries), the pots 12, 14 can be separated from each other and the control unit 22 can, as in Fig. 5 represented each of the cooking pots 12, 14 assign a separate heating zone 16, 18. The bottom surface of the saucepans 12, 14 can also be easily determined after separating the cooking pots 12, 14, for example, as the area of the in Fig. 5 illustrated circles.

Den so definierten Heizzonen 16, 18 werden dann von der Steuereinheit 22 jeweils unterschiedliche Gruppen von Induktoren 10 zugeordnet, die die Heizleistung der jeweiligen Heizzone 16, 18 erzeugen. Diese Zuordnung ist in Figur 7 dargestellt. Induktoren 10, die von beiden Heizzonen 16, 18 überlappt werden, bleiben dabei inaktiv. Die Steuereinheit 22 bestimmt für jede der Heizzonen 16, 18 eine Heizleistung in der oben beschriebenen Weise und betreibt die der entsprechenden Heizzone 16, 18 zugeordneten Induktoren 10 so, dass in der Summe eine bestimmte Gesamtheizleistung erzeugt wird. Diese Gesamtheizleistung wird von der Steuereinheit 22 für jede aktive Heizzone 16, 18 in der oben beschriebenen Weise abhängig von der Bodenfläche der Kochtöpfe 12, 14 und abhängig von der für die jeweilige Heizzone 16, 18 eingestellten Leistungsstufe berechnet.The heating zones 16, 18 defined in this way are then assigned by the control unit 22 in each case to different groups of inductors 10, which generate the heat output of the respective heating zone 16, 18. This assignment is shown in FIG. Inducers 10, which are overlapped by both heating zones 16, 18, remain inactive. The control unit 22 determines for each of the heating zones 16, 18 a heating power in the manner described above and operates the corresponding heating zone 16, 18 associated inductors 10 so that in the sum of a certain total heating power is generated. These Total heating power is calculated by the control unit 22 for each active heating zone 16, 18 in the manner described above depending on the bottom surface of the cooking pots 12, 14 and depending on the power level set for the respective heating zone 16, 18.

Zur Bestimmung der Bodenfläche ordnet die Steuereinheit 22 den detektierten Kochtopf 12, 14 einer der Kategorien "Rund", "Oval", "Rechteckig" zu und bestimmt in einem Optimierungsverfahren die Parameter der jeweiligen geometrischen Form so, dass die überdeckte Fläche am besten beschrieben wird. Im Falle runder Töpfe bestimmt die Steuereinheit den Radius und berechnet aus dem Radius die Bodenfläche.To determine the floor area, the control unit 22 assigns the detected cooking pot 12, 14 to one of the categories "round", "oval", "rectangular" and determines in an optimization method the parameters of the respective geometric shape so that the covered area is best described , In the case of round pots, the control unit determines the radius and calculates the floor area from the radius.

Bezugszeichenreference numeral

1010
Induktorinductor
1212
Kochtopfcooking pot
1313
Kochtopfcooking pot
1414
Kochtopfcooking pot
1616
Heizzoneheating zone
1818
Heizzoneheating zone
2020
Heizzoneheating zone
2222
Steuereinheitcontrol unit
2424
BenutzerschnittstelleUser interface
2626
Detektionsanordnungdetection device
2828
Flächearea

Claims (5)

Verfahren zum Detektieren von Kochgeschirrelementen (12, 14) auf einem Matrix-Kochfeld, umfassend die Schritte: - Erzeugen einer ersten Abbildung einer Bodenfläche eines Kochgeschirrelements oder mehrerer Kochgeschirrelemente (12, 14), die auf das Matrix-Kochfeld aufgestellt sind, und - Klassifizieren einer zusammenhängenden Fläche (28) in der ersten Abbildung abhängig von der Form und/oder Größe der Fläche (28), dadurch gekennzeichnet, dass bei zumindest einem Ergebnis der Klassifizierung ein Topfseparationsalgorithmus angewandt wird, um Flächen, die von einem einzigen Kochgeschirrelement erzeugt sind, von Flächen (28) zu unterschieden, die von zwei oder mehreren Kochgeschirrelementen (12, 14) erzeugt sind.A method of detecting cookware elements (12, 14) on a matrix hob, comprising the steps of: - Generating a first image of a bottom surface of a cookware or more cookware elements (12, 14), which are placed on the matrix hob, and Classifying a contiguous area (28) in the first image depending on the shape and / or size of the area (28), characterized in that in at least one result of the classification, a pot separation algorithm is used to distinguish areas created by a single cookware element from areas (28) produced by two or more cookware elements (12, 14). Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die erste Abbildung von einer Detektionsanordnung (26) erzeugt wird, die Induktoren (10) des Kochfelds als Detektoren nutzt.A method according to claim 1, characterized in that the first image is generated by a detection arrangement (26) which uses inductors (10) of the hob as detectors. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die erste Abbildung durch ein Punktraster von Messpunkten erzeugt wird, in dem jedem Messpunkt ein Messwert zugeordnet wird, der eine Kenngröße für einen Überdeckungsgrad zwischen der Bodenfläche eines Kochgeschirrelements (12, 14) und einer Umgebung des Messpunkts ist.Method according to one of the preceding claims, characterized in that the first image is generated by a dot matrix of measuring points, in which each measurement point is assigned a measured value, which is a parameter for a degree of coverage between the bottom surface of a cookware element (12, 14) and an environment of the measuring point. Matrix-Kochfeld mit einer Vielzahl von Heizelementen (10), einer Detektionsanordnung (26) zum Detektieren einer Position und Größe wenigstens eines Kochgeschirrelements (12, 13, 14) und einer Steuereinheit (22), die dazu ausgelegt ist, eine erste Abbildung einer Bodenfläche eines Kochgeschirrelements oder mehrerer Kochgeschirrelemente zu erzeugen, die auf das Matrix-Kochfeld aufgestellt sind, und eine zusammenhängende Fläche in der Abbildung abhängig von der Form und/oder Größe der Fläche zu klassifizieren und abhängig von einer detektierten Größe und Position des Kochgeschirrelements (12, 13, 14) mehrere Heizelemente (10) zu einer Heizzone (16, 18, 20) oder mehreren Heizzonen (16, 18, 20) zusammenzufassen, dadurch gekennzeichnet, dass die Steuereinheit (22) dazu ausgelegt ist, bei zumindest einem Ergebnis der Klassifizierung einen Topfseparationsalgorithmus auf die erste Abbildung anzuwenden, um Flächen, die von einem einzigen Kochgeschirrelement erzeugt sind von Flächen (28) zu unterschieden, die von zwei oder mehreren Kochgeschirrelementen (12, 13, 14) erzeugt sind.A matrix cooktop having a plurality of heating elements (10), a detection assembly (26) for detecting a position and size of at least one cookware element (12, 13, 14) and a control unit (22) adapted to provide a first image of a floor surface a cooking utensil or a plurality of cookware elements placed on the matrix hob, and to classify a contiguous area in the image depending on the shape and / or size of the area and depending on a detected one Size and position of the cookware element (12, 13, 14) a plurality of heating elements (10) to a heating zone (16, 18, 20) or more heating zones (16, 18, 20) summarize, characterized in that the control unit (22) designed to for at least one result of the classification, applying a pot separation algorithm to the first map to distinguish areas created by a single cookware element from areas (28) created by two or more cookware elements (12, 13, 14). Matrix-Kochfeld nach Anspruch 4, dadurch gekennzeichnet, dass die Heizelemente (10) Induktoren sind und dass die Detektionsanordnung (26) die Induktoren umfasst, um das Kochgeschirrelement (12, 13, 14) induktiv zu detektieren.A matrix cooktop according to claim 4, characterized in that the heating elements (10) are inductors and that the detection arrangement (26) comprises the inductors for inductively detecting the cookware element (12, 13, 14).
EP10158908A 2009-04-17 2010-04-01 Method for detecting cookware on a matrix hob Revoked EP2242328B1 (en)

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Application Number Priority Date Filing Date Title
ES200930072A ES2362839B1 (en) 2009-04-17 2009-04-17 PROCEDURE FOR DETECTING COOKING BATTERY ELEMENTS ON A MATRIX COOKING FIELD.

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EP2242328A3 EP2242328A3 (en) 2011-01-19
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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2966690A1 (en) * 2010-10-21 2012-04-27 Fagorbrandt Sas METHOD FOR DETECTING AT LEAST ONE COOKING AREA IN A COOKTOP.
WO2013136218A1 (en) * 2012-03-14 2013-09-19 BSH Bosch und Siemens Hausgeräte GmbH Hob apparatus
DE102012204546A1 (en) * 2012-03-21 2013-09-26 BSH Bosch und Siemens Hausgeräte GmbH Method for operating an induction hob and induction hob
EP2600690A3 (en) * 2011-11-29 2013-12-04 BSH Bosch und Siemens Hausgeräte GmbH Cooking hob
EP2688366A1 (en) * 2012-07-20 2014-01-22 BSH Bosch und Siemens Hausgeräte GmbH Hotplate device
WO2015015360A1 (en) * 2013-07-31 2015-02-05 BSH Bosch und Siemens Hausgeräte GmbH Cooktop device
EP2988573A1 (en) 2014-08-20 2016-02-24 Miele & Cie. KG Cooking field device, and method for operating the same
DE102014110026B4 (en) * 2014-07-17 2016-12-22 Miele & Cie. Kg Method for operating a cooking field device and cooking field device
DE102015118453A1 (en) * 2015-10-29 2017-05-04 Miele & Cie. Kg Method for operating a cooking field device
EP3432684A1 (en) * 2017-07-17 2019-01-23 E.G.O. ELEKTRO-GERÄTEBAU GmbH Method for operating a cleaning device
EP3013120B1 (en) 2014-10-23 2019-08-28 BSH Hausgeräte GmbH Hotplate device
DE102019115192A1 (en) * 2019-06-05 2020-12-10 Miele & Cie. Kg Cooking system and method of operation
EP3920662A1 (en) 2020-06-05 2021-12-08 Whirlpool Corporation System and method for identifying cookware items placed on an induction cooktop
FR3118389A1 (en) * 2020-12-22 2022-06-24 Groupe Brandt Method of operating an induction hob on which a ferromagnetic element is placed
US11617236B2 (en) * 2016-10-25 2023-03-28 Electrolux Appliances Aktiebolag Induction hob and method for controlling an induction hob
WO2023110674A1 (en) 2021-12-17 2023-06-22 BSH Hausgeräte GmbH Cooktop system, cooktop, and method for operating the cooktop system

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ES2439417B1 (en) 2012-07-20 2015-03-12 Bsh Electrodomesticos Espana Cooking Field Device
EP3028536B1 (en) 2013-07-31 2020-04-22 BSH Hausgeräte GmbH Stove top device
US12058797B2 (en) 2020-06-05 2024-08-06 Whirlpool Corporation System and method for identifying cookware items placed on an induction cooktop
US11596030B2 (en) 2020-06-05 2023-02-28 Whirlpool Corporation System and method for identifying cookware items placed on an induction cooktop

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WO2005064992A1 (en) 2003-11-27 2005-07-14 Brandt Industries Method for heating a container placed on a cooktop by heating means associated to inductors

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IT1319292B1 (en) * 2000-11-08 2003-10-10 Whirlpool Co DEVICE TO DETECT THE PLACEMENT OF COOKING TOOLS ON A COOKING HOB WITH DISCRETE AND DISTRIBUTED HEATING ELEMENTS.
DE102005001857A1 (en) * 2005-01-07 2006-07-20 E.G.O. Elektro-Gerätebau GmbH Hob with lighting and method for lighting a hob
ES2304892B1 (en) * 2007-04-09 2009-06-04 Bsh Electrodomesticos España, S.A. COOKING FIELD AND PROCEDURE FOR THE OPERATION OF A COOKING FIELD.
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WO2005064992A1 (en) 2003-11-27 2005-07-14 Brandt Industries Method for heating a container placed on a cooktop by heating means associated to inductors

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2966690A1 (en) * 2010-10-21 2012-04-27 Fagorbrandt Sas METHOD FOR DETECTING AT LEAST ONE COOKING AREA IN A COOKTOP.
EP2445310A3 (en) * 2010-10-21 2013-01-02 FagorBrandt SAS Method for detecting at least one cooking area in a cooktop
EP2600690A3 (en) * 2011-11-29 2013-12-04 BSH Bosch und Siemens Hausgeräte GmbH Cooking hob
EP2600691A3 (en) * 2011-11-29 2013-12-11 BSH Bosch und Siemens Hausgeräte GmbH Cooking hob
WO2013136218A1 (en) * 2012-03-14 2013-09-19 BSH Bosch und Siemens Hausgeräte GmbH Hob apparatus
DE102012204546A1 (en) * 2012-03-21 2013-09-26 BSH Bosch und Siemens Hausgeräte GmbH Method for operating an induction hob and induction hob
EP2688366A1 (en) * 2012-07-20 2014-01-22 BSH Bosch und Siemens Hausgeräte GmbH Hotplate device
WO2015015360A1 (en) * 2013-07-31 2015-02-05 BSH Bosch und Siemens Hausgeräte GmbH Cooktop device
US10085304B2 (en) 2013-07-31 2018-09-25 BSH Hausgeräte GmbH Cooktop device
DE102014110026B4 (en) * 2014-07-17 2016-12-22 Miele & Cie. Kg Method for operating a cooking field device and cooking field device
EP2988573A1 (en) 2014-08-20 2016-02-24 Miele & Cie. KG Cooking field device, and method for operating the same
DE102014111899A1 (en) * 2014-08-20 2016-02-25 Miele & Cie. Kg Cooking field device and method of operation
EP3013120B2 (en) † 2014-10-23 2022-08-24 BSH Hausgeräte GmbH Hotplate device
EP3013120B1 (en) 2014-10-23 2019-08-28 BSH Hausgeräte GmbH Hotplate device
DE102015118453B4 (en) * 2015-10-29 2017-11-16 Miele & Cie. Kg Method for operating a cooking field device
DE102015118453A1 (en) * 2015-10-29 2017-05-04 Miele & Cie. Kg Method for operating a cooking field device
US11617236B2 (en) * 2016-10-25 2023-03-28 Electrolux Appliances Aktiebolag Induction hob and method for controlling an induction hob
EP3432684A1 (en) * 2017-07-17 2019-01-23 E.G.O. ELEKTRO-GERÄTEBAU GmbH Method for operating a cleaning device
DE102019115192A1 (en) * 2019-06-05 2020-12-10 Miele & Cie. Kg Cooking system and method of operation
EP3920662A1 (en) 2020-06-05 2021-12-08 Whirlpool Corporation System and method for identifying cookware items placed on an induction cooktop
EP3920663A1 (en) 2020-06-05 2021-12-08 Whirlpool Corporation System and method for identifying cookware items placed on an induction cooktop
FR3118389A1 (en) * 2020-12-22 2022-06-24 Groupe Brandt Method of operating an induction hob on which a ferromagnetic element is placed
EP4021144A1 (en) * 2020-12-22 2022-06-29 Groupe Brandt Method for operating an induction hob on which a ferromagnetic element is placed
WO2023110674A1 (en) 2021-12-17 2023-06-22 BSH Hausgeräte GmbH Cooktop system, cooktop, and method for operating the cooktop system

Also Published As

Publication number Publication date
EP2242328A3 (en) 2011-01-19
EP2242328B1 (en) 2012-06-20
ES2362839B1 (en) 2012-05-22
ES2387642T3 (en) 2012-09-27
ES2362839A1 (en) 2011-07-14

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