Cooking system and method of operation

Abstract

Method for operating a cooking system (200) comprising at least one cooking hob device (1), at least one cooking utensil (100) and at least one evaluation device (50), wherein the hob device (1) comprises at least one support surface (2) for placing cooking utensils (100) and at least two generator devices (6, 7, 8), wherein at least one generator device (6, 7, 8) has at least two induction devices (3) for heating the cooking utensils (100) placed on the support surface (2) and wherein the cookware (100) is suitable and designed to be heated by means of at least one induction device (3), wherein the induction devices (3) of the hob device (1) are each assigned at least one transmitting device (4) and wherein the cookware (100) comprises at least one receiving device (101), wherein the transmitting devices (4) at least temporarily each transmit at least one electromagnetic signal (13) which is received by the receiving device (101) of the cookware (100) when the cookware (100) is heated by the corresponding induction device (3), wherein the transmitting device (4) is arranged and designed to transmit a sequence of electromagnetic signals (13), characterized by that at least one sequence of electromagnetic signals (13) as assignment signals (5) encodes a signature for a specific induction device (3), so that an assignment of the cookware (100) to at least one induction device (3) is possible and that at least one further electromagnetic signal (13) is transmitted as an information signal (14) at a predetermined time interval (15) from at least one of the assignment signals (5), wherein the interval from the assignment signal (5) encodes a specific property, and wherein the property of the corresponding induction device (3) in the information signal (14) is recognized by the evaluation device (50).

Description

[0001] The present invention relates to a cooking system and a method for operating such a cooking system. The cooking system comprises at least one cooking surface, at least one piece of cooking utensil, and at least one evaluation device, wherein the cooking surface comprises at least one support surface for placing cooking utensils and at least two induction devices for heating the cooking utensils placed on the support surface. The cooking utensil is suitable and designed to be heated by means of at least one induction device. Furthermore, at least one transmitting device is each assigned to the induction devices of the cooking surface, and the cooking utensil comprises at least one receiving device.At least one transmitting device transmits at least one electromagnetic signal, at least temporarily, which is received by the receiving device of the cookware when the cookware is heated by the corresponding induction device. Cooking systems with transmitting and receiving devices are described in WO 2015 / 028 076 A1 and DE 10 2009 029 253 A1.

[0002] The automation of cooking processes and user support are becoming increasingly important in modern household appliances. Ease of use is also becoming increasingly important.

[0003] In the area of ​​cooktops, for example, surface induction cooktops have become popular, which do not have predefined and clearly marked cooking zones on the cooktop's surface. The cooking zones, or the induction coils located beneath a pot, are then each defined as a cooking zone, with only the corresponding induction coils being activated.

[0004] It is advantageous, if not essential, for the hob to automatically detect where a pot is placed in order to activate the corresponding induction coils. Various systems have been developed for this purpose. For example, systems have also been developed in which the induction coils emit signals that are detected and further processed by the pot placed on the hob.

[0005] However, the potential for detecting the potty position and assisting a user has not yet been fully exploited and there is a need for further support and better comfort.

[0006] For example, the systems mentioned above use a specific type of cookware that can receive and process the signals emitted by the cooktop. This requires energy, which can be provided inductively during operation of the cooktop. However, before and after cooking, the power supply is provided by a rechargeable battery or battery. Special charging stations are provided for this purpose, or the battery must be replaced after a certain period of time. This represents a loss of convenience for the user.

[0007] It is therefore the object of the present invention to provide an automatic assignment of a pot or the like to one of several induction coils of a hob, which functions reliably and offers further advantages over the prior art.

[0008] This object is achieved by a method having the features of claim 1 and by a cooking system having the features of claim 15. Preferred developments of the invention are the subject of the subclaims. Further advantages and features of the invention will become apparent from the exemplary embodiments.

[0009] The method according to the invention is suitable for operating a cooking system comprising at least one hob device, at least one piece of cooking utensil, and at least one evaluation device. The hob device comprises at least one support surface for placing cooking utensils and at least one generator device with at least two induction devices for heating the cooking utensil placed on the support surface. The cooking utensil is suitable and designed to be heated by means of at least one induction device. At least one transmitting device is assigned to each of the induction devices of the hob device, and the cooking utensil comprises at least one receiving device.The transmitting devices each transmit at least one electromagnetic signal, at least temporarily, which is received by the receiving device of the cookware when the cookware is heated by the corresponding induction device. According to the invention, at least one sequence of electromagnetic signals encodes a signature for a specific induction device as assignment signals, so that the cookware can be assigned to at least one induction device. Furthermore, at least one further electromagnetic signal is transmitted as an information signal at a predetermined time interval from at least one of the assignment signals, wherein the interval from the assignment signal encodes a specific property.

[0010] The evaluation device is in particular in contact with or operatively connected to the hob device and / or the cookware, wherein the evaluation device is preferably part of the hob device or can be integrated into it. Depending on the design, the evaluation device can also be assigned to the cookware and / or preferably be provided as a separate device that is connected to the cookware and / or the hob device. For example, the function of the evaluation device can also be provided by a central control device for several household appliances, which can be separate from a household appliance or integrated into a household appliance.

[0011] To ensure that the evaluation unit, which can further process the assignment signals received from the cookware, is operatively connected to the evaluation device, the cookware preferably comprises at least one communication device by means of which information and / or the received assignment signals can be forwarded to the evaluation device. Such a communication device can, for example, be implemented via Bluetooth, WLAN, radio, or the like, or can comprise such communication means.

[0012] For the general method of assigning cookware to a hob device or a heating element or a heating zone of a hob device and the structural design of cookware and hob device, the content of patent application EP 3 614 795 A2 is incorporated into this application by reference.

[0013] The generator device comprises, in particular, the induction devices, each of which preferably comprises at least one induction coil by means of which the cookware can be excited or heated. The generator device can preferably also comprise and / or be connected to further components of the power electronics.

[0014] According to the invention, the information signal encodes at least one property. This property can in particular be at least one state of the hob device, the generator and / or the induction devices. It is therefore particularly advantageous if the operating mode of the hob device, the generator and / or the induction devices is transmitted as a property. Preferably, the type of hob device being used can also be transmitted as a property, or exclusively. In particular, it can be transmitted that a fully integrated hob with a base with specific properties or parameters is being used. The cooking process of the cookware can then preferably be adapted accordingly. A property can also be, in particular, the temperature, at least one operating parameter, a button status, the food to be prepared and / or the like.

[0015] The property is transmitted via the information signal. Certain properties and / or combinations of properties are stored in the cookware, the evaluation device, and / or the hob device, which are recognized as coded properties depending on the distance between the information signal and an assignment signal.

[0016] The at least one information signal can preferably be sent before or after the assignment signals or before or after the assignment signature.

[0017] In principle, the information signal can also be transmitted within the assignment signature. Depending on the configuration, a suitable number of electromagnetic signals can then preferably be selected to distinguish between the assignment signals and the information signal(s), for example, via defined flanking signals or electromagnetic signals. The information signal is preferably transmitted before the first or after the last assignment signal.

[0018] In all embodiments, it is preferred that at least one transmitting device is provided by at least one induction device. This minimizes the design effort, since existing components can be used as the transmitting device.

[0019] Furthermore, in all embodiments, at least one receiving device preferably comprises at least one coil. This makes it possible to easily provide a receiving device for the signals emitted by the transmitting device.

[0020] An electromagnetic signal is in particular at least one electromagnetic excitation which is emitted or transmitted by the transmitting device.

[0021] The method according to the invention offers many advantages. A significant advantage is that, in addition to coding the pot position, additional information can be transmitted from the hob to the cookware via the electromagnetic signals.

[0022] For example, depending on the design, speed-optimized data transmission can be achieved or the frequency of data transmission can be adjusted. Known cookware that can communicate with a hob device, so-called system cooking cookware, usually always sends information such as process data, TE signature ping, temperature, button status, etc. at the same interval, even if this interval could be longer for some applications. For example, in a preparation mode of the hob and / or in a residual heat mode of the system cooking cookware, longer intervals are sufficient if an "exact" temperature is set in the cookware or if, for example, milk needs to be prevented from boiling over. For example, with milk it is extremely important that a lot of process data is transmitted relatively frequently or quickly from the system cooking cookware to the process technology so that the process technology can prevent rapid boiling over.The system cookware requires its own power supply. While the process energy can usually be provided by the induction coils via induction, there are also operating modes without actively charging the system cookware. Such operating modes include preparation mode and / or residual heat utilization. Speed-optimized data transmission or adjusting the frequency of signal transmission significantly reduces the energy consumption of the electronics in the system cookware. This can significantly accelerate battery recharging, reduce the frequency, and / or significantly extend the battery life. This provides enormous convenience for the user.

[0023] In addition, depending on the design, data transmission can be optimized for the situation. One application here is conceivable, for example, if the induction devices are not installed in a classic cooktop with a glass ceramic surface, but in a so-called fully integrated cooktop. In this case, the induction devices can be installed, for example, under and / or in a ceramic plate or under or in a conventional worktop. In this case, it makes sense to send the fully integrated installation of the generator device under, for example, a ceramic plate to the cookware as an information signal or property. This information can then be recognized by the system cookware and sent to the process technology. This, in turn, limits the maximum temperature and / or the ΔT / t, and / or other parameters or values, depending on the surface, for example.

[0024] Furthermore, depending on the design, selective data transmission can occur. This is useful, for example, when the cookware or its energy storage device or battery is being charged. In this case, it is sufficient to transmit the current charge level and software version. If the software version is not up to date but the charge level is sufficient, the process control board in the cooktop device performs an update, depending on the design. Here, too, the power consumption of the cookware's electronics can be reduced.

[0025] All three of the applications described above preferably provide energy-optimized data transmission. With lower power consumption, smaller charging systems for cookware can be provided, depending on the application.

[0026] In particular, operating mode with an empty battery or energy storage device is avoided. This generally ensures that the cookware can be used at all times. This also offers a convenience advantage for the user.

[0027] In addition, the intervals between battery changes can be significantly extended or changes can even be avoided.

[0028] In addition, as already described, the transmission of certain properties, depending on the design, enables operation on alternative surfaces to glass ceramic, in particular without adapting the generator or the cookware.

[0029] Preferably, the electromagnetic signals of the individual transmitting devices are transmitted with a predetermined time offset, and / or the assignment signals and / or the information signals of the individual induction devices comprise different predetermined sequences of electromagnetic signals as a signature, so that the evaluation device can assign the electromagnetic signals detected by the receiving device to the individual induction devices and thus assign the cookware to at least one induction device and assign a property. This allows for a clear assignment even with multiple coils.

[0030] Particularly preferably, at least one interval and / or frequency of transmitting electromagnetic signals depends, at least temporarily, on at least one property detected from at least one information signal. For example, by transmitting a specific operating state of the hob device, the generator device, and / or the induction device, the frequency of signal transmission can be reduced, for example in preparation mode and / or when using residual heat. For example, when boiling milk, the food can be transmitted as a property, which preferably leads to more frequent signal transmission.

[0031] In advantageous embodiments, at least one interval and / or frequency of transmitting electromagnetic signals depends, at least temporarily, on the energy state of at least one energy storage device. This ensures a type of emergency operation, for example, if the charge level of the energy storage device, such as a battery, would no longer be sufficient for the entire cooking process during normal data transmission.

[0032] In expedient developments, at least one cooking process is adapted based on at least one property detected from at least one information signal. For example, the cooking process can be adapted depending on the worktop in fully integrated cooktops or based on other properties such as the food.

[0033] Preferably, the assignment signals of the individual induction devices comprise the same predetermined sequences of electromagnetic signals, which are differentiated by the time offset. This allows for a clear assignment of induction devices to a cookware item.

[0034] Particularly preferably, at least two generator devices are provided, and the assignment signals of the individual induction devices each comprise a predetermined sequence of at least three electromagnetic signals as a signature, wherein a first distance between the first electromagnetic signal and the second electromagnetic signal encodes the generator device, and a second distance between the second electromagnetic signal and the third electromagnetic signal encodes the induction device of the corresponding generator device, or vice versa. This allows for a clear assignment of the generator device and the induction device to a piece of cookware.

[0035] In advantageous further developments, the first distance from generator device to generator device becomes larger and the second distance from induction device to induction device of a respective generator device becomes smaller.

[0036] Preferably, the information signal is transmitted as a fourth electromagnetic signal at a third distance from the third electromagnetic signal, wherein the third distance encodes a property of the hob device, at least one generator device, and / or at least one induction device. Depending on the configuration, the information signal can also be transmitted as a first signal, wherein the distances between the assignment signals are then configured accordingly.

[0037] Particularly preferably, at least two induction devices of at least one generator device transmit an electromagnetic signal at least once simultaneously. This allows even more information to be transmitted in a preferably 4-digit binary coding, in which up to 16 possible modes are then preferably possible.

[0038] Preferably, the received electromagnetic signals are translated into a unique identification number corresponding to the coverage of certain induction devices and / or corresponding to a specific property.

[0039] In appropriate further developments, the received predetermined sequences of electromagnetic excitations of the corresponding induction devices are entered into a common temporal progression, whereby the identification number is determined on the basis of the signal pattern.

[0040] Preferably, the intensity of at least one electromagnetic signal is taken into account.

[0041] Particularly preferably, the intensity of the electromagnetic signals is taken into account in order to determine whether individual induction devices are covered by cookware.

[0042] The cooking system according to the invention comprises at least one hob device, at least one piece of cooking utensil, and at least one evaluation device. The hob device comprises at least one support surface for placing cookware and at least two induction devices for heating the cookware placed on the support surface. The cookware is suitable and designed to be heated by means of at least one induction device, wherein at least one transmitting device is each assigned to the induction devices of the hob device. The cookware comprises at least one receiving device, wherein the transmitting devices are suitable and designed to each emit at least one electromagnetic signal, at least temporarily, and wherein the receiving device is suitable and designed to receive an electromagnetic signal when the cookware is heated by the corresponding induction device.Furthermore, the evaluation device is suitable and designed to recognize a signature for a specific induction device from at least one sequence of electromagnetic signals as assignment signals, so that the cookware can be assigned to at least one induction device. Furthermore, the evaluation device is suitable and designed to recognize at least one property of the hob device, a generator device, and / or the corresponding induction device from at least one further electromagnetic signal with a predetermined time interval from at least one of the assignment signals as an information signal.

[0043] The cooking system according to the invention also offers the advantages already described above for the method according to the invention.

[0044] The cookware preferably comprises at least one energy storage device. Such an energy storage device can, for example, be a permanently installed and / or replaceable battery and / or a permanently installed and / or replaceable rechargeable battery. Other energy storage devices can also be used appropriately depending on the design. Particularly when rechargeable batteries are used, these can preferably be charged inductively by the induction devices.

[0045] Particularly preferably, the interval and / or frequency of electromagnetic signal transmission depends on a detected property and / or the energy state of the energy storage device. This is particularly useful during preparatory operation and / or when utilizing residual heat. Depending on the application, adapted signal transmission protects the energy storage device by reducing the number of signals sent and / or optimizes processes by transmitting data more frequently.

[0046] A further method according to the application is suitable for operating a cooking system comprising at least one hob device, at least one piece of cooking utensil, and at least one evaluation device. The hob device has at least one installation surface for placing cooking utensils and at least one generator device with at least two induction devices for heating the cookware placed on the installation surface. The cookware is suitable and designed to be heated by means of at least one induction device. Furthermore, at least one transmitting device is each assigned to the induction devices of the hob device, and the cookware comprises at least one receiving device. The transmitting devices each transmit at least one assignment signal, at least temporarily, which is received by the receiving device of the cookware when the cookware is heated by the corresponding induction device.According to the invention, the assignment signals of the individual transmitting devices are transmitted with a predetermined time offset, so that the evaluation device can assign the assignment signals detected by the receiving device to the individual induction devices and thus assign the cookware to at least one induction device. Additionally or alternatively, the assignment signals of the individual induction devices can comprise different predetermined sequences of electromagnetic excitations as a signature.

[0047] The evaluation device is in particular in contact with or operatively connected to the hob device and / or the cookware, wherein the evaluation device is preferably part of the hob device or can be integrated into it. Depending on the design, the evaluation device can also be assigned to the cookware and / or preferably be provided as a separate device that is connected to the cookware and / or the hob device. For example, the function of the evaluation device can also be provided by a central control device for several household appliances, which can be separate from a household appliance or integrated into a household appliance.

[0048] To ensure that the evaluation unit, which can further process the assignment signals received from the cookware, is operatively connected to the evaluation device, the cookware preferably comprises at least one communication device by means of which information and / or the received assignment signals can be forwarded to the evaluation device. Such a communication device can, for example, be implemented via Bluetooth, WLAN, radio, or the like, or can comprise such communication means.

[0049] The generator device comprises, in particular, the induction devices, each of which preferably comprises at least one induction coil by means of which the cookware can be excited or heated. The generator device can preferably also comprise and / or be connected to further components of the power electronics.

[0050] This method also offers many advantages. A significant advantage is that the method according to the invention can provide automatic detection of the position of the pot or cookware on the hob or on the surface of the hob. This makes it possible to identify which induction devices or induction coils are covered by a particular piece of cookware.

[0051] A particularly advantageous feature is that the temporally offset transmission of the assignment signal creates the possibility of assigning the assignment signals to a specific induction device. Thus, even with the same assignment signal and / or with the same signal components, a specific assignment to a specific coil can be achieved through the temporal offset.

[0052] It also makes it possible to detect that a cookware item is not only supported on or powered by a single induction coil, but also that, for example, a cookware item partially or completely covers multiple induction coils. This also makes it possible to detect the use of multiple induction devices or induction coils for a cookware item.

[0053] All these advantages also arise when the induction coils or induction devices emit predetermined signal sequences as a signature, which are unique for each induction device, so that the coverage of certain induction devices can be deduced.

[0054] Preferably, the assignment signals of the individual induction devices comprise the same predetermined sequences of electromagnetic excitations, which are differentiated by the temporal offset. A simple assignment signal can be provided via such signals, for example, ping signals. Such an electromagnetic excitation or such a ping signal can preferably be provided by at least one range of the electromagnetic excitation of an induction device, with a specific section or range or value of the half-waves used for the excitation being used as the signal.

[0055] If the assignment signals of the individual induction devices comprise different predetermined sequences of electromagnetic excitations as a signature, a clear assignment to a coil can be made, preferably based on the type of electromagnetic signal from the individual coils. The number of electromagnetic signals in the sequence, or the number of ping signals, and also the spacing between the ping signals can be used as distinguishing features for predetermined sequences of electromagnetic excitations. Even with different signal sequences for the individual induction devices, the temporal offset can ensure that the signals from the individual coils do not overlap and can be evaluated separately.

[0056] Preferably, at least two generator devices are provided, and the assignment signals of the individual induction devices each comprise a predetermined sequence of at least three electromagnetic excitations as a signature. The first distance between the first electromagnetic excitation and the second electromagnetic excitation encodes the generator device of the corresponding induction device, and a second distance between the second electromagnetic excitation and the third electromagnetic excitation encodes the corresponding induction device of the corresponding generator device, or vice versa. In this way, even in a hob device with multiple generators, a clear assignment of the individual induction devices can be achieved. The signal sequence contains the information about the corresponding generator device and the corresponding induction device.

[0057] Preferably, the first distance from generator device to generator device is increased, and the second distance from induction device to induction device of a respective generator device is decreased. Such a systematic approach to signal signatures allows for particularly advantageous, precise, and unmistakable coding of the individual induction devices, even when multiple induction devices are covered.

[0058] In advantageous embodiments, the received electromagnetic stimuli are translated into a unique identification number corresponding to the coverage of specific induction devices. By translating the ping signature into a specific identification number unique to the coverage of induction devices, information can be transmitted with a very small data volume.

[0059] When translating the ping signals or electromagnetic excitations into an identification number, the method of binary addition can be used, for example, and preferably, to convert the presence or absence of signals into a specific number. The resulting identification numbers are unique for a specific signature or signature combination. In preferred embodiments, these identification numbers can be stored in a list, for example, whereby a specific, for example, eight-digit identification number is assigned a consecutive number, for example, a two-digit number.

[0060] All data processing is preferably performed on a chip in the cookware. This chip can, for example, store a table of individual identification numbers as a concordance list for the two-digit numbers. This allows information to be transferred from the cookware to the hob with extremely low data transfer rates. This can be done, for example, via Bluetooth or another suitable data interface.

[0061] Particularly preferably, the received predetermined sequences of electromagnetic excitations from the corresponding induction devices are entered into a common temporal progression, with the identification number being determined based on the resulting signal pattern. In this case, the received signals, regardless of their affiliation to a specific induction device, are placed in an overall context with all received signals. Depending on the design, the uniqueness of the individual signatures results in a unique signature composition, which can be translated into a specific identification number for the corresponding combination of specific induction devices or even individual induction devices.

[0062] In expedient developments, the intensity of at least one assignment signal is taken into account. In this case, intensity refers in particular to the amplitude of electromagnetic radiation or the electromagnetic signal measured by the receiving device. Thus, at a predetermined maximum amplitude, complete coverage of the corresponding induction device can be assumed. At lower amplitudes, the corresponding induction devices are only partially covered, depending on the amplitude.

[0063] In expedient embodiments, the intensity of the assignment signals is then taken into account to determine whether individual induction devices are covered by a cookware item. This makes it possible to identify the relevant induction devices for a set-up cookware item based on the received assignment signals, and the intensity or amplitude of the assignment signal can be used to determine the percentage coverage of the individual induction devices or individual induction coils. Thus, the reception of a signal can be used to determine whether a coil is covered by a cookware item, and the amplitude can be used to determine the extent of the coverage.

[0064] Preferably, at least one transmitting device is provided by at least one induction device. In such a configuration, at least one induction coil of at least one induction device is used as the transmitting device. By using an induction coil or a primary coil as the transmitting device, a transmitting device is provided without significant structural complexity.

[0065] Particularly preferably, at least one receiving device comprises at least one coil. Such a coil can be arranged, in particular, in the base of the cookware. Configuring the receiving device as a coil or as a secondary coil allows for a simple technical implementation of a receiving device.

[0066] In expedient developments, at least two receiving devices are provided in the cookware. Either two separate receiving devices can be provided or just one receiving device with two receivers, wherein the signals from the two receivers can then preferably be evaluated differently or separately. By providing two separate receiving devices or at least two separately evaluable receivers, it is possible to detect the orientation of the cookware and also movements of the cookware on the support surface, wherein the translational movement of the cookware across the support surface is also possible in principle with just one receiving device.

[0067] Preferably, at least one orientation of the cookware on the installation surface is detected. This is particularly possible if at least two receiving devices are provided in the cookware.

[0068] Preferably, in particular when two or more induction devices are covered by the cookware, at least one operating parameter of at least one induction device is adjusted depending on the orientation of the cookware. In this case, for example, in the case of a roasting pan, two different cooking zones can be provided by providing two receiving devices, for example in the base of the roasting pan. For example, the two receiving devices can be used to detect which of the two coils is pointing towards the user. In a preferred embodiment of a special cookware, for example, it can be achieved that, for a certain orientation of the cookware on the hob device, a hot searing zone is provided at the front and a somewhat cooler warming zone is provided at the rear.If the pot is placed in a different orientation on the hob, even heating of the cookware can be ensured, for example. The applicant reserves the right to also claim a cookware with at least two receiving devices.

[0069] Preferably, at least one movement of the cookware on the support surface is detected. The movement of the cookware across the support surface can be detected either with a single coil or with multiple receiving devices in the cookware.

[0070] Preferably, the movement of the cookware on the support surface comprises at least one translational and / or at least one rotational movement. For example, it can be detected whether the cookware is being pulled away from its original position and / or whether the cookware is being rotated within its original position. Both actions can be used to change or adjust certain operating parameters, depending on the configuration. A rotational movement is preferably detected in a cookware that comprises two receiving devices.

[0071] Preferably, at least one operating parameter of the hob device is adjusted based on the movement. For example, pulling a piece of cookware away from the currently used induction device can automatically switch off the hob device for at least that piece of cookware. Furthermore, it is possible, for example, to change the power of the corresponding induction device by rotating the cookware on the spot. For example, depending on the design, rotating clockwise can increase the power, while rotating counterclockwise can decrease the power.

[0072] Preferably, at least one operating parameter set for a cookware item of at least one induction device is transferred to the relevant induction device(s) when the cookware is moved. Thus, by moving the pot on the support surface, the setting for a cookware item can be transferred to another induction device if the pot is moved to a different location, for example, due to lack of space or other reasons.

[0073] Preferably, the transmitting devices transmit the assignment signals during the operation of at least one induction device. In such a configuration, the electromagnetic radiation used to heat the cookware, or portions thereof, can also be used as the assignment signal.

[0074] In other expedient embodiments, or even additionally, the transmitting devices also transmit the assignment signals when the hob device or the induction devices are not in operation. Such a method operates, in particular, with relatively low electromagnetic radiation, whereby a pot position can be detected even when the hob device is switched off or none of the induction devices is in operation.

[0075] Preferably, a display device on the cookware is activated via the assignment signals and / or a change in the assignment signals. This can, for example, support the display of parameters or instructions to the user and / or the monitoring of a cooking process. The applicant reserves the right to claim such a cookware.

[0076] All features described for this method can preferably be combined individually and / or in combination with other features with the method according to the invention or preferred developments thereof.

[0077] Another hob system according to the application comprises at least one hob device, at least one piece of cooking utensil, and at least one evaluation device, wherein the hob device comprises at least one installation surface for placing cookware and at least two induction devices for heating the cookware placed on the installation surface. The cookware is suitable and designed to be heated by means of at least one induction device. At least one transmitting device is assigned to each of the induction devices of the hob device, wherein the cookware comprises at least one receiving device. The transmitting devices are suitable and designed to each transmit at least one assignment signal, at least temporarily, wherein the receiving device is suitable and designed to receive these signals when the cookware is heated by the corresponding induction device.According to the invention, the evaluation device is suitable and designed to assign the cookware to at least one induction device via the assignment signals transmitted by the transmitting device with a time offset and detected by the receiving device and / or via the detected signatures from the predetermined sequences of electromagnetic excitations of the individual assignment signals of the individual induction devices.

[0078] This cooking system also offers the advantages already described above for the method according to the invention.

[0079] Preferably, at least one transmitting device is provided by at least one induction device or at least one induction coil of the at least one induction device. Thus, at least one transmitting device is preferably provided by at least one primary coil.

[0080] Particularly preferably, at least one receiving device comprises at least one coil or at least one secondary coil.

[0081] In expedient embodiments, at least two receiving devices are provided in the cookware. Preferably, either two separate receiving devices are provided and / or one receiving device with at least two separately evaluable receivers.

[0082] In expedient embodiments, the cookware comprises at least one display device which can be activated or supplied with information in particular by means of at least one assignment signal and / or at least one change in the assignment signal.

[0083] All features described for this cooking system can preferably be combined individually and / or in combination with other features with the cooking system according to the invention or preferred developments thereof.

[0084] Further advantages and features of the present invention will become apparent from the embodiment which will be explained below with reference to the accompanying figures.

[0085] The figures show: Fig. 1 a purely schematic representation of a cooking system according to the invention in a perspective view; Fig. 2 a purely schematic representation of the provision of assignment signals by means of an induction coil of an induction device; Fig. 3 a purely schematic representation of the assignment of a cookware to certain induction devices or induction coils; Fig. 4 a purely schematic representation of the assignment of a cookware to certain induction devices or induction coils; Fig. 5 a purely schematic representation of the assignment of a cookware to certain induction devices or induction coils; Fig. 6 a purely schematic representation of the assignment of a cookware to certain induction devices or induction coils; Fig. 7 a purely schematic representation of the assignment of a cookware to certain induction devices or induction coils; Fig. 8 a purely schematic representation of the assignment of a cookware to certain induction devices or induction coils; Fig. 9 a purely schematic representation of the assignment of a cookware to certain induction devices or induction coils; Fig. 10 is a purely schematic representation of the use of a cooking utensil with two receiving devices in two different orientations on the cooking surface device; Fig. 11 is a purely schematic representation of the arrangement of a cooking utensil with two receiving devices on a cooking hob device; Fig. 12 a purely schematic representation of the assignment of a cookware to specific induction devices or induction coils according to a further embodiment; Fig. 13 a purely schematic representation of the conversion of ping signatures into identification numbers; Fig. 14 another purely schematic representation of the conversion of ping signatures into identification numbers; Fig. 15 a purely schematic representation of the assignment of a cooking utensil to specific induction devices or induction coils by means of an embodiment of the method according to the invention; Fig. 16 a purely schematic representation of the assignment of a cooking utensil to specific induction devices or induction coils by means of a further embodiment of the method according to the invention; and Fig. 17 a purely schematic representation of the assignment of a cooking utensil to certain induction devices or induction coils by means of another embodiment of the method according to the invention.

[0086] In Fig. Figure 1 shows a purely schematic perspective view of a cooking system 200 according to the invention. In the exemplary embodiment shown here, the cooking system 200 comprises a hob device 1, which is installed in the worktop 301 of a kitchen unit 300.

[0087] The hob device 100 comprises a base 2 on which cookware 100 can be placed. In the embodiment shown here, several induction devices 3 are evenly arranged below the base 2, by means of which the cookware 100 standing on the base 2 can be heated. For the sake of clarity, only two induction devices 3 are shown in Fig. 1 indicated.

[0088] Furthermore, the cooking system 200 comprises an evaluation device 50, which in the embodiment shown here is integrated into the cooking surface device 1.

[0089] In the exemplary embodiment shown here, the hob device 1 comprises a plurality of transmitting devices 4 for transmitting at least one assignment signal 5, via which, in interaction with the cookware 100 and the evaluation device 50, the position of the cookware 100 on the installation surface 2 can be automatically detected. This makes it possible to assign the induction devices 3 to a cookware 100 standing on the installation surface 2.

[0090] In the embodiment shown here, the transmitting devices 4 are integrated into the induction devices 3 or are provided by the induction coils of the induction devices 3.

[0091] The cookware 100 here has a receiving device 101, which in the illustrated embodiment is also provided by a coil 102 on or in the base 104 of the cookware 100. Depending on the design, more than one receiving device 101 and / or multiple receivers may be provided.

[0092] In the method according to the invention, the transmitting devices 4 at least temporarily transmit assignment signals 5, which are received or detected by the receiving device 101 or, depending on the design, by a plurality of receiving devices 101 of the cookware 100 when the cookware 100 is arranged on the support surface 2 in such a way that it is heated by these induction devices 3.

[0093] The received assignment signals 5 and / or a further processed signal are transmitted to the evaluation device 50 by means of a suitable communication device (not shown in detail). The communication device can be integrated into the cookware 100 or, depending on the design, can also be provided as a separate module that can access the receiving device 101 of the cookware 100 via suitable functions.

[0094] The cookware 100 can also include a display device 103, which is activated by the assignment signals 5, by changes in the assignment signals, or in another way. It is thus also possible to transmit information to the cookware via the assignment signals and display it on the display device 103.

[0095] To ensure the power supply to the components for signal processing of the cookware, a rechargeable battery 106 is provided as the energy storage device 105 in the embodiment shown here. In the embodiment shown, this battery can be charged in a charging station when not in use. During operation of the cooktop device 1, the power supply is provided primarily via the induction devices 3.

[0096] In Fig. Figure 2 shows a purely schematic representation of the functioning of the method according to the invention. Four induction devices 3 of a hob device 1 are shown, with the induction coils of the induction devices 3 functioning as transmitting devices 4.

[0097] Below the induction devices 3 are Fig. 2 shows the half-waves emitted by the induction devices 3 or the induction coils of the induction devices 3 for heating a cooking utensil 100. In addition to the induction devices, it is shown purely schematically that a range of these half-waves or a specific voltage value of the electromagnetic radiation is used as the assignment signal 5.

[0098] Below the row of half-waves, two examples of assignment signals 5 for the induction devices 3 are shown. The first rows 1-4 show that a temporally offset assignment signal 5 is transmitted by the four induction devices 3 or the four transmitting devices 4, with the pattern of the assignment signals being identical.

[0099] So-called ping signals are provided here, whereby a transmission pattern consists of three signals with a certain time interval.

[0100] The time offset in the transmission of the assignment signals 5 still allows a clear distinction to be made between the individual induction devices 3. The time offset in the embodiment shown here is approximately 10 ms. However, the time offset can also be selected differently within suitable ranges.

[0101] The lower four lines show purely schematically that the assignment signals 5, which are also now intended as ping signals, do not have the identical structure.

[0102] Thus, based on the distance between the individual signals from the individual transmitting devices, a signal structure is created that is different and unique for each induction device. Thus, a specific induction device 3 or a specific transmitting device 4 can be identified solely based on the structure of the assignment signals or ping signals.

[0103] Due to the temporal offset of the transmission of the assignment signals 5, there is no joint detection of different signals, so that the signal from different induction devices 3 or transmission devices 4 can always be clearly distinguished by the temporal component.

[0104] In the Fig. 3 and Fig. 4 shows a purely schematic representation of the allocation signals 5 received from a cooking utensil, wherein in the exemplary embodiment shown here, a cooking utensil 100 covers only the first induction coil 3. The signal received and evaluated in the evaluation device 50 corresponds to the signal structure and the time component of the first induction device 3. Thus, the position of the cooking utensil 100 on the installation surface 2 can be clearly determined.

[0105] In Fig. 4 shows that the cookware 100 is resting on the first and third induction devices 3. The corresponding signal is shown to the right, whereby an assignment to specific induction devices 3 can be clearly made via the signal structure and the temporal reception of the corresponding assignment signals 5 by the receiving device 101, so that the exact position of the cookware 100 on the installation surface 2 can be recognized by the evaluation device 50.

[0106] In the Fig. 5 and Fig. 6 shows a purely schematic way of distinguishing the allocation signals 5 of more than four induction devices 3 or the induction devices of several generators.

[0107] The induction devices 3 are divided into two groups of four, with the distinction between the first and second groups being achieved by a phase shift. In this case, the distinction between the induction devices 3 of a first generator A and those of a second generator B was achieved by a phase shift of 120°.

[0108] In Fig. 5, two induction devices 3 are covered by a cooking utensil. The assignment signals 5 received by the receiving device 101 of the cooking utensil 100 and transmitted to the evaluation device 50 are shown next to the induction devices 3.

[0109] In Fig. 6 is the same arrangement as in Fig. 5 is shown again, with the set-up cookware 100 now covering four induction devices 3. The data or signals received by the receiving device 101 of the cookware 100 and transmitted to the evaluation device 50 are shown again.

[0110] In the Fig. 7 to 9 show purely schematically that the amplitude or intensity of the received assignment signal 5 can contribute to optimizing the position detection.

[0111] In this case, Fig. 7 shows that a cookware item 100 rests predominantly on the first induction device 3. Only a much smaller part of the cookware item 100 also covers the second induction device 3.

[0112] The percentage coverage of induction devices 3 by a cookware item 100 can be clearly determined via the level, amplitude, or intensity of the received assignment signals 5. The received assignment signal 5 of the first induction device 3 is significantly higher than that of the second induction devices 3. Thus, the percentage coverage of the respective induction device can be determined from the strength, amplitude, or intensity of an assignment signal 5 received corresponding to the coverage of an induction device 3.

[0113] In Fig. 8 is the same arrangement as in Fig. 7, wherein the first two induction devices 3 are evenly covered by a cookware 100. The corresponding assignment signal 5 is shown next to it, wherein the same amplitude or signal height of the assignment signals 5 indicates approximately 50% coverage of the respective induction devices 3.

[0114] In Fig. 9, as already shown in the two previous figures, shows that the percentage coverage can be determined from the height, amplitude, or intensity of an assignment signal 5. Here, the first four induction devices 3 are covered differently by a cookware 100, with the first and second induction devices 3 being covered equally, and the third and fourth induction devices 3 being covered equally, with the first and second induction devices being covered to a greater extent than the third and fourth induction devices 3. The corresponding received assignment signals 5 are shown to the right.

[0115] In Fig. 10 shows purely schematically that a cookware item 100 can also have more than one receiving device 101. Then, in addition to the position on the installation surface 2 of a cooking hob device 1, the orientation of the cookware item 100 on the installation surface 2 can also be detected.

[0116] The arrow indicates purely schematically the orientation of the cookware 100 on the installation surface 2. The cookware 100 is shown again purely schematically in the middle in order to illustrate the two receiving devices 101 once again.

[0117] For example, depending on the design, different areas or sections of a cookware 100 can be assigned a different operating mode. For this purpose, different cooking zones are provided depending on the orientation of the cookware 100 on the installation surface 2 or depending on which receiving device 101 is facing or facing away from the user.

[0118] For example, in the illustration on the left, it is possible to provide a different searing zone at the front or facing the user, while a warming zone is provided in the rear area of ​​the cookware.

[0119] If the cookware 100 is now set up with a different orientation, in the embodiment shown here rotated by 180°, for example, uniform heating of the cookware 100 can be provided.

[0120] In Fig. 11 shows a purely schematic illustration of how, for example, certain operating parameters can be adjusted by moving the cookware 100 on the installation surface 2 of a hob device 1. This is possible with just one receiving device 101 or with multiple receiving devices 101.

[0121] If, for example, only one receiving device 101 is provided for the cookware 100, translational movements can be detected and converted, for example, into control signals. Thus, it is possible that, for example, pulling a cookware 100 away from an induction device 3 can deactivate this induction device 3.

[0122] In addition, depending on the design, it is possible to transfer the operating parameters set for an induction device 3 to this induction device 3 by pulling the cookware 100 away from another induction device 3.

[0123] In particular, if at least two receiving devices 101 are provided, rotational movements on the support surface 2 can also be detected, so that, for example, operating parameters can be changed by rotating the cookware 100. For example, turning the cookware 100 clockwise can increase the power, while turning it counterclockwise can decrease the power.

[0124] Other settings can also be conveniently adjusted via the movement and / or orientation of the cookware.

[0125] In Fig. 12 shows purely schematically that, particularly when using several generator devices 6, 7, 8, the assignment signals 5 can not only be transmitted at different times from one another, but can additionally or exclusively have a specific signal signature or ping signature.

[0126] In the embodiment shown here, a first generator 6 with four induction devices 3 or induction coils, a second generator 7 with four induction devices 3 and a third generator with four induction devices 3 are provided.

[0127] In order to enable a clear assignment of a cookware 100 to one or more induction devices 3, both time-shifted assignment signals 5 and signal signatures are used in the embodiment shown here.

[0128] It can be seen that a temporal signal curve of 23 signal blocks 12 is used here, with each signal block corresponding to 10 milliseconds. In each signal block, an assignment signal 5 can either be transmitted or received or not.

[0129] In order to distinguish between the individual induction devices 3 of the individual generators, a defined signal structure is used in the illustrated embodiment. Each induction device emits a predetermined sequence of electromagnetic excitations as a signature, with the signal sequences being emitted by the induction devices 3 to a respective generator device 6, 7, 8 at different times. The signal sequences are each started one signal block later.

[0130] In the exemplary embodiment shown here, the predetermined sequence of electromagnetic excitations as a signature comprises three excitations, with a first distance 9 between the first excitation and the second excitation defining the generator device 6, 7, 8. This first distance 9 increases from the first generator device 6 to the third generator device 8. Thus, the first distance 9 between the first excitation and the second excitation of a signal sequence can be used to determine the corresponding generator device 6, 7, 8.

[0131] A second distance 10 defines the corresponding induction device 3, which for the sake of clarity are designated A1, A2, A3, A4, B1 [...] C3 and C4 according to their association with a specific generator device 6, 7, 8.

[0132] The distance 10 from induction device A1 to A4, B1 to B4 and C1 to C4 becomes smaller and smaller.

[0133] This systematic signal sequence allows a cookware item 100 to be clearly assigned to specific induction devices.

[0134] In the Fig. 13 and Fig. Figure 14 illustrates the further processing of the detected signal sequences or signatures. In the illustrated embodiment, the detected signals are entered into the 23 signal blocks 12 provided here, regardless of their association with a specific signal sequence of a specific induction device 3.

[0135] Due to the corresponding systematic nature of the signal sequences, the offset of the signals and the distances 9, 10 between the signals, unique patterns are created here again, which correspond to the coverage of certain induction devices. Fig. 13 and Fig. 14 only multiple covers are taken into account.

[0136] The signal pattern thus entered is converted into an eight-digit number or identification number 11 through binary addition. Other methods can also be used to convert the pattern into a unique number. This identification number 11 corresponds to a specific coverage of induction devices 3 by a cookware 100.

[0137] This identification number 11 could be transmitted to the hob without too much data volume. In the exemplary embodiment shown here, however, a table is stored in a chip in the cookware 100, in which each identification number 11 is assigned a consecutive number, which is stored in the Fig. 13 and Fig. 14 is entered in the line next to the identification number 11. This allows the data volume to be further reduced during transmission from the cookware 100 to the hob 1.

[0138] In Fig. Figure 15 shows a purely schematic representation of the operation of the method according to the invention with a cooking system 200 according to the invention. A cooking hob device 1 is provided with three generator devices 6, 7, 8, each of which has four induction coils 3.

[0139] In the embodiment shown here, a cooking utensil 100 is placed on the installation surface 2 of the hob device 1 and covers the induction device A2 of the first generator device 6 and the induction device B1 of the generator device 7.

[0140] The signal coding or the different signatures of the induction devices 3 are shown below in the Fig. 15. As already explained above, there are also three electromagnetic signals 13, which encode a specific induction device 3 as assignment signals 5. Here, too, a first distance 9 is provided between the first assignment signal 5 and the second assignment signal, which encodes a specific generator device 6, 7, 8.

[0141] A second distance 10 is provided between the second assignment signal and the third assignment signal 5, which encodes a specific induction device 3. Due to the different starting point of the signals, the four induction devices 3 can be clearly distinguished or assigned to three generator devices 6, 7, 8 in the embodiment shown here.

[0142] In the exemplary embodiment shown here, the first distance 9 is the same for the induction devices 3 of a generator device 6, 7, 8 and increases progressively from generator device to generator device. The different induction devices are each coded by a decreasing distance 10. In the exemplary embodiment shown, the distances 10 for the respective induction devices 3 are the same for the three generator devices 6, 7, 8.

[0143] In contrast to the previously shown designs, in Fig. 15, a further signal block is provided, which comprises information signals 14. These information signals 14 are transmitted at a predetermined distance 15 from one of the assignment signals 5 and code for a specific property of the hob 1, at least one generator device 6, 7, 8 and / or at least one induction device.

[0144] In the embodiment shown here, the information signal is a fourth signal that indicates a property. Depending on the configuration, however, multiple information signals 14 can also be transmitted.

[0145] Here, a third distance 16 is provided between the third assignment signal 5 and the information signal 14, wherein a specific property is coded via the time interval between the last assignment signal 5 and the information signal 14.

[0146] In particular, this property can be at least one state of the hob device, at least one generator device, and / or the induction devices. It is particularly advantageous if the operating mode of the hob device, the generator, and / or the induction devices is transmitted as a property.

[0147] Preferably, the type of cooktop device being used can be transmitted additionally or exclusively as a property. In particular, it can be transmitted that a fully integrated cooktop with a base having specific properties or parameters is being used. The cooking process of the cookware can then preferably be adjusted accordingly. A property can also be, in particular, the temperature, at least one operating parameter, a button status, the food to be prepared, and / or the like.

[0148] By transferring at least one property of, for example, an induction device 1, the energy consumption of the energy storage device 105 or, in this case, a battery 106 of the cookware 100 can be significantly reduced.

[0149] In the exemplary embodiment shown here, induction devices A2 and B1 were identified via the assignment signals 5. Furthermore, the property "1" was transmitted for both induction devices A2 and B1, which is defined by the first information signal 14. The "Preparation" operating mode is stored in the evaluation device 50 for this property, so that the frequency or interval of data transmission can be reduced. This can save energy.

[0150] Depending on the design, different properties and / or combinations of properties can be stored for the information signals. This allows, in particular, speed-optimized data transmission or the frequency of data transmission to be adjusted. Depending on the design, situation-optimized and / or selective data transmission can also be achieved. Energy-optimized data transmission or signal transmission is particularly preferred.

[0151] In Fig. 16 shows a purely schematic representation of a further embodiment of the functioning of the method according to the invention with a cooking system 200 according to the invention. The situation corresponds to that for Fig. 15 described situation. The difference from the previously described embodiment is that the information signals 14 are not provided after the assignment signals 5, but before them.

[0152] In the embodiment shown here, information signals encoding a specific property are first sent. This is followed by the assignment signals, which are used to correctly assign the active induction devices 3 for a cookware item 100.

[0153] Depending on the design, the information signals 14 can also be sent between the assignment signals 5. However, in this case, an unnecessarily large number of electromagnetic signals 13 are usually required to form defined blocks, so that assignment signals 5 and information signals can be distinguished.

[0154] In Fig. 17 shows another exemplary embodiment purely schematically. Here again, the same situation applies as in the Fig. 15 and Fig. 16. In contrast to the previously shown embodiments, however, the information signals are encoded differently.

[0155] In this embodiment, it can happen that if a cooking utensil 100 covers several induction devices 3 of a generator device 6, 7, 8, a generator device 6, 7, 8 outputs two or more electromagnetic signals 13 at once.

[0156] Furthermore, the distance 15, 16 of the information signals 14 to an assignment signal 5 alone cannot be used to determine a specific induction device 3. Here, an overall signal for a property is output. List of reference symbols 1 hob device 2 installation area 3 Induction device 4 Transmitter 5 Assignment signal 6 first generator device 7 second generator device 8 third generator device 9 first distance 10 second distance 11 Identification number 12 Signal block 13 electromagnetic signal 14 Information signal 15 time interval 16 third distance 50 Evaluation device 100 cookware 101 Reception device 102 coil 103 Display device 104 Floor 105 energy storage 106 rechargeable battery 200 cooking system 300 kitchenette 301 work surface

Claims

Method for operating a cooking system (200) comprising at least one cooking surface device (1), at least one cooking utensil (100), and at least one evaluation device (50), wherein the cooking surface device (1) comprises at least one installation surface (2) for placing cooking utensils (100) and at least two generator devices (6, 7, 8), wherein at least one generator device (6, 7, 8) has at least two induction devices (3) for heating the cooking utensil (100) placed on the installation surface (2), and wherein the cooking utensil (100) is suitable and designed to be heated by means of at least one induction device (3), wherein the induction devices (3) of the cooking surface device (1) are each assigned at least one transmitting device (4), and wherein the cooking utensil (100) comprises at least one receiving device (101), wherein the transmitting devices (4) each at least temporarily transmit at least one electromagnetic signal (13) send out,which is received by the receiving device (101) of the cookware (100) when the cookware (100) is heated by the corresponding induction device (3), wherein the transmitting device (4) is set up and designed to transmit a sequence of electromagnetic signals (13), characterized in that at least one sequence of electromagnetic signals (13) encodes a signature for a specific induction device (3) as assignment signals (5), so that an assignment of the cookware (100) to at least one induction device (3) is possible, and that at least one further electromagnetic signal (13) is transmitted as an information signal (14) at a predetermined time interval (15) from at least one of the assignment signals (5), wherein the interval from the assignment signal (5) encodes a specific property,and wherein the property of the corresponding induction device (3) in the information signal (14) is recognized by the evaluation device (50)., Method according to claim 1, characterized in that the assignment signals (5) and / or the information signals (14) of the individual induction devices (3) comprise different predetermined sequences of electromagnetic signals (13) as a signature, so that the evaluation device (50) can assign the assignment signals (5) and / or information signals (14) detected by the receiving device (101) to the individual induction devices (3) and thus assign the cooking utensil (100) to at least one induction device (3) and / or recognize at least one property of the hob device (1), at least one generator device (6, 7, 8) and / or at least one induction device (3), or the assignment signals (5) and / or the information signals (14) of the individual induction devices (3) comprise different predetermined sequences of electromagnetic signals (13) as a signature,so that the evaluation device (50) can assign the assignment signals (5) and / or information signals (14) detected by the receiving device (101) to the individual induction devices (3) and thus assign the cookware (100) to at least one induction device (3) and / or recognize at least one property of the hob device (1), at least one generator device (6, 7, 8) and / or at least one induction device (3), wherein the electromagnetic signals (13) of the individual transmitting devices (4) are transmitted with a predetermined time offset. Method according to one of the preceding claims, characterized in that at least one interval and / or a frequency of transmission of electromagnetic signals (13) depends at least temporarily on at least one property recognized from at least one information signal (14). Method according to one of the preceding claims, characterized in that a cooking process is adapted on the basis of at least one property recognized from at least one information signal (14). Method according to one of the preceding claims, characterized in that the assignment signals (5) of the individual induction devices (3) comprise the same predetermined sequences of electromagnetic excitations, which are differentiated by the time offset. Method according to the preceding claim, characterized in that the first distance (9) from generator device (6, 7, 8) to generator device (6, 7, 8) becomes larger and that the second distance (10) from induction device (3) to induction device (3) of a respective generator device (6, 7, 8) becomes smaller. Method according to one of the two preceding claims, characterized in that the information signal (14) is a fourth electromagnetic signal (13) with a third distance (15, 16) to the third electromagnetic signal (13), wherein the third distance (15, 16) encodes a property of the hob device (1), at least one generator device (6, 7, 8) and / or at least one induction device (3). Method according to one of the preceding claims, characterized in that at least two induction devices (3) of at least one generator device (6, 7, 8) transmit at least one electromagnetic signal (13) at least once simultaneously. Method according to one of the preceding claims, characterized in that the received electromagnetic signals (13) are translated into a unique identification number (11) which corresponds to the coverage of certain induction devices (3) and / or a certain property. Method according to the preceding claim, characterized in that the received predetermined sequences of electromagnetic signals (13) of the corresponding induction devices (3) are entered into a common time profile and that the identification number is determined on the basis of the signal pattern. Method according to one of the preceding claims, characterized in that the intensity of at least one electromagnetic signal (13) is taken into account. Method according to one of the preceding claims, characterized in that the intensity of the electromagnetic signals (13) is taken into account in order to conclude that individual induction devices (3) are covered by a cooking utensil (100). Cooking system (200) comprising at least one cooking surface device (1), at least one cooking utensil (100), and at least one evaluation device (50), wherein the cooking surface device (1) comprises at least one support surface (2) for supporting cooking utensils (100) and at least two induction devices (3) for heating the cooking utensil (100) placed on the support surface (2), and wherein the cooking utensil (100) is suitable and designed to be heated by means of at least one induction device (3), wherein at least one transmitting device (4) is assigned to each of the induction devices (3) of the cooking surface device (1), and wherein the cooking utensil (100) comprises at least one receiving device (101), wherein the transmitting devices (4) are suitable and designed toto transmit at least one electromagnetic signal (13) at least temporarily, and wherein the receiving device (101) is suitable and designed to receive an electromagnetic signal (13) when the cooking utensil (100) is heated by the corresponding induction device (3), wherein the transmitting device (4) is set up and designed to transmit a sequence of electromagnetic signals (13), characterized in that the evaluation device (50) is suitable and designed to recognize a signature for a specific induction device (3) from at least one sequence of electromagnetic signals (13) as assignment signals (5), so that an assignment of the cooking utensil (100) to at least one induction device (3) is possible, and that the evaluation device (50) is suitable and designed toto detect at least one property of the corresponding induction device (3) from at least one further electromagnetic signal (13) with a predetermined time interval to at least one of the assignment signals (5) as an information signal (14). Cooking system according to the preceding claim, characterized in that the cooking utensil comprises at least one energy storage device (105).

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