EP1879428B1 - Device to determine the temperature of a medium - Google Patents

Device to determine the temperature of a medium Download PDF

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Publication number
EP1879428B1
EP1879428B1 EP06014765.9A EP06014765A EP1879428B1 EP 1879428 B1 EP1879428 B1 EP 1879428B1 EP 06014765 A EP06014765 A EP 06014765A EP 1879428 B1 EP1879428 B1 EP 1879428B1
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EP
European Patent Office
Prior art keywords
temperature
receiving
mobile unit
arrangement according
foodstuff
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP06014765.9A
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German (de)
French (fr)
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EP1879428A1 (en
Inventor
Frank Dipl.-Ing. Göltenboth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WMF Group GmbH
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WMF Group GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WMF Group GmbH filed Critical WMF Group GmbH
Priority to EP06014765.9A priority Critical patent/EP1879428B1/en
Priority to JP2009518733A priority patent/JP2009544005A/en
Priority to US12/307,163 priority patent/US8274392B2/en
Priority to PCT/EP2007/005186 priority patent/WO2008006433A1/en
Publication of EP1879428A1 publication Critical patent/EP1879428A1/en
Application granted granted Critical
Publication of EP1879428B1 publication Critical patent/EP1879428B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • H05B6/64—Heating using microwaves
    • H05B6/6447—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors
    • H05B6/645—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using temperature sensors

Definitions

  • One from the WO 2004/071131 known device which is used to control a cooking process for food, contains a temperature sensor and a wireless transmission device in the form of an RFID tag with an antenna and an RFID receiving and evaluation device.
  • the temperature sensor and the RFID tag are housed on the outside of a cooking vessel, preferably in its handle.
  • the receiving and evaluation device is located on the stove, for example.
  • the temperature measurement on the outside of a cooking vessel is not particularly accurate and reliable, however, since the temperature on the outside of the cooking vessel, especially in the case of cooking vessels with a relatively large diameter, differs noticeably from the temperature inside the food. Furthermore, this type of temperature monitoring is only possible if the cooking vessel is equipped with the transmission device and the temperature sensor. This means that the user can only use these cooking vessels.
  • a device for determining the temperature of the food is provided in the form of a roasting skewer, which is provided with a wireless transmission device which, together with the temperature sensor, is designed as a mobile unit for direct measurement in the food.
  • the receiving and evaluation device is arranged outside the food.
  • the transmission device and the sensor are supplied with energy from outside via radio waves, in particular via microwave energy.
  • the transmission frequency of the temperature sensor is changed proportionally to the temperature, ie the transmission frequency serves as an analog signal from the transmitter.
  • the not pre-published EP 1 726 882 A1 describes a cooking appliance with a temperature detection device and a temperature measuring device with a mobile unit comprising a temperature sensor and an RFID transponder, which is wirelessly coupled to a transmitter / receiver unit.
  • the temperature sensor can be inserted into solid food like a skewer.
  • An apparatus for measuring ocean currents in which temperature sensors of an arrangement between an anchor and a float are held ocean and send data via a cable to a wireless transmission device attached to a surface buoy, so that the wireless transmission device sends the data to a Can forward recipients on a ship.
  • the JP S58 173193 U discloses a device for determining the temperature of a food, the device having a mobile unit which contains a temperature sensor and a transmission device and is designed as a floating body.
  • WO 2005017476 is also state of the art.
  • roast thermometers are also known which can be inserted into the medium, for example with the aid of a skewer body, and can measure the temperature inside the medium.
  • meat thermometers have so far only been set up for reading or require, as in the EP-A-1 199 528 is described, a socket in the interior of the oven and, if necessary, wiring. But here too the area of application is limited to the oven.
  • the invention is therefore based on the object of creating a device for determining the temperature of a medium with an extended range of use.
  • the device according to the invention can be used universally and for every cooking vessel.
  • a significantly more meaningful temperature measurement is possible, since the temperature can be measured directly inside the medium.
  • the mobile unit is provided with suitable devices, which in particular hold the temperature sensor in a place where a temperature measurement is particularly useful and meaningful, which is achieved by a floating body that holds the temperature sensor in the middle of a liquid medium and prevents it, for example sinks to the very hot bottom of the vessel.
  • the mobile unit can also contain a sensor body that can be attached directly to a medium, for example designed as a skewer, which can be inserted into the medium, for example a roast.
  • a sensor body that can be attached directly to a medium, for example designed as a skewer, which can be inserted into the medium, for example a roast.
  • the transmission device contains a system for contactless data acquisition on the basis of radio frequency technology, as is the case with the commercially available RFID system.
  • RFID enables contactless data acquisition and consists of the data carrier (one chip and one antenna in each carrier - RFID tag) and a reader (consisting of an antenna and a decoder). Magnetic or electromagnetic fields are used for data transmission.
  • the RFID tag is able to send information in a low-frequency field even without its own power supply, with the energy for the low-frequency field being provided by the reader.
  • the receiving and evaluating device can be designed for a wide variety of tasks; for example an alarm can be triggered when predetermined limit values exceeded, the temperature determined can be displayed, a manual input device can be provided with which the user is able to enter limit values, for example, a timer can be provided and a control device can be provided which controls a heating source for the medium.
  • Fig. 1 shows a schematic block diagram of a device 1 according to the invention for determining the temperature of a medium.
  • the device according to the invention can be used for the most varied of purposes, but is particularly suitable for determining the temperature of foods that are heated for the purpose of preparation.
  • the device 1 contains a temperature-resistant, mobile unit 2 which, in the exemplary embodiment shown, contains a temperature sensor 3 and a transmission device 4.
  • the transmission device 4 is an RFID tag, ie a chip 4a with antenna 4b, as in FIG Fig. 3 shown in more detail.
  • the chip 4a contains the conventional components customary for these chips, an integrated temperature sensor 3 and possibly also a pressure sensor (not shown), which can be used to determine, for example, whether the mobile unit 2 is in the medium.
  • the device according to the invention also contains a receiving and evaluation device 6, which can be arranged separately from the mobile unit 2 and is in wireless connection with the mobile unit 2.
  • the receiving and evaluation device 6 contains the components usually required for the RFID tag (RFID transponder), for example an antenna 7 and an RFID reader 8 (RFID reader), with which the RFID tag is supplied with energy, for example, and the temperature detected by temperature sensor 3 can be read.
  • a control device 9 is also provided for processing the signals received.
  • the control device 9 is connected to a manual input device 10, for example a keyboard, by means of which the user can specify operating parameters.
  • a timer (not shown) and a display device 11, for example a display, are provided in order to display relevant or selected parameters, such as the identification of the mobile unit 2, a target temperature, a current temperature, the time that has elapsed or the time that is still available, manual inputs, etc.
  • An alarm device 12 is also provided by which an alarm can be triggered in the event of predetermined operating conditions, for example when a predetermined temperature has been exceeded, a predetermined time has elapsed or a predetermined temperature has been exceeded for a predetermined time or the like.
  • the alarm can be visual and / or acoustic.
  • the control device 9 also contains a timer.
  • the mobile unit 2 is placed in the medium, for example in a cooking item in a cooking vessel, and the receiving and evaluation device 6 is arranged at a suitable location outside the medium, for example on a stove.
  • the receiving and evaluation device can generate a low-frequency field cyclically or only on request, which causes the transmission device 4 to send its identity and the temperature determined by the sensor 3 and possibly information about the pressure determined by the pressure sensor.
  • These signals are processed by the control device 9 in the desired manner. For example, it is possible to only display the temperature and, if necessary, to trigger an alarm if a temperature entered manually via the input device 10 is exceeded, either immediately or only after a predetermined period of time.
  • the mobile unit 2 and the receiving and Auwert worn 6, with or without alarm device 12, can, however, as Fig. 2 shows, can be combined with a control unit 13 to form a device 1 'which is able to actively influence the temperature profile by controlling a heating source 14 for heating the medium.
  • the control unit 13 is connected to the controller 9, the desired temperature profile being entered via the input device 10 if it has not been previously stored in the controller.
  • the mobile unit 2 is intended to be arranged and used directly on or in the medium and can be designed in the most varied of ways in order to ensure that it optimally detects the temperature of the medium.
  • the mobile unit 2 can for example be provided with a sensor body which contains the temperature sensor 3 and is attached to a solid medium, for example by suitable fastening means such as clips or the like
  • Fig. 4 shows, be designed as a so-called meat thermometer 14, ie for insertion into a solid medium.
  • the meat thermometer 14 contains a skewer body 15 in which the temperature sensor 3 is accommodated and a head 16 which contains the antenna 4b and the chip 4a of the transmission device 4.
  • the head 16 is preferably designed so that the transmission device 4 is protected against excessive heating.
  • the mobile unit 2 is designed for flowable or liquid media in the form of a float 17 which contains a float 17a made of a floatable material, for example a temperature-resistant foam material, in which the antenna 4b and the chip 4a are embedded in a temperature-protected manner.
  • the temperature sensor 3 is preferably exposed on a surface of the floating body 17 so that an unhindered temperature measurement is possible.
  • the mobile unit 2 can also be designed as a combination of the meat thermometer and float, so that it can be used universally both in liquid media, ie in Media in which the floating body can swim, as well as in solid media, ie in media in which an inserted spear body 15 or a clip or the like holds, can be used.
  • the invention is also suitable for all other uses, for example in laboratory or process technology and for temperature monitoring of any kind, i.e. can be used for both heating and cooling.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Description

Eine aus der WO 2004/071131 bekannte Vorrichtung, die zum Steuern eines Garprozesses für Lebensmitteln dient, enthält einen Temperatursensor und eine drahtlose Übertragungseinrichtung in Form eines RFID-tag mit Antenne und einer RFID-Empfangs- und Auswerteinrichtung. Der Temperatursensor und der RFID-tag sind an der Außenseite eines Kochgefäßes, bevorzugt in dessen Handgriff, untergebracht. Die Empfangs- und Auswerteinrichtung befindet sich beispielsweise am Herd. Die Temperaturmessung an der Außenseite eines Kochgefäßes istjedoch nicht besonders genau und zuverlässig, da sich die Temperatur an der Außenseite des Kochgefäßes, insbesondere bei Kochgefäßen mit relativ großem Durchmesser, doch merklich von der Temperatur im Inneren des Kochgutes unterscheidet. Weiterhin ist diese Art der Temperaturüberwachung nur dann möglich, wenn das Kochgefäß mit der Übertragungseinrichtung und dem Temperatursensor ausgerüstet ist. Dies bedeutet, dass der Benutzer nur noch diese Kochgefäße verwenden kann.One from the WO 2004/071131 known device, which is used to control a cooking process for food, contains a temperature sensor and a wireless transmission device in the form of an RFID tag with an antenna and an RFID receiving and evaluation device. The temperature sensor and the RFID tag are housed on the outside of a cooking vessel, preferably in its handle. The receiving and evaluation device is located on the stove, for example. The temperature measurement on the outside of a cooking vessel is not particularly accurate and reliable, however, since the temperature on the outside of the cooking vessel, especially in the case of cooking vessels with a relatively large diameter, differs noticeably from the temperature inside the food. Furthermore, this type of temperature monitoring is only possible if the cooking vessel is equipped with the transmission device and the temperature sensor. This means that the user can only use these cooking vessels.

Eine weitere Vorrichtung ist aus der US 4,230,731 A bekannt. Die bekannte Vorrichtung bezieht sich auf ein Verfahren und eine Vorrichtung zum Steuern eines Mikrowellenherds. Es ist eine Vorrichtung zum Bestimmen der Temperatur des Lebensmittels in Form eines Bratenspießes vorgesehen, die mit einer drahtlosen Übertragungseinrichtung versehen ist, die zusammen mit dem Temperatursensor als mobile Einheit zur direkten Messung im Lebensmittel ausgebildet ist. Die Empfangs- und Auswerteinrichtung ist außerhalb des Lebensmittels angeordnet. Die Energieversorgung der Übertragungseinrichtung und des Sensors erfolgt von außerhalb über Radiowellen, insbesondere über Mikrowellenenergie. Beim Bestimmen der Temperatur wird die Sendefrequenz des Temperatursensors proportional zur Temperatur verändert, d.h. die Sendefrequenz dient als Analogsignal des Senders. Mit dieser Technologie würde es schwierig bis unmöglich, mehrere Sensoren gleichzeitig parallel zu betreiben bzw. auszulesen.Another device is from the U.S. 4,230,731 A known. The known device relates to a method and an apparatus for controlling a microwave oven. A device for determining the temperature of the food is provided in the form of a roasting skewer, which is provided with a wireless transmission device which, together with the temperature sensor, is designed as a mobile unit for direct measurement in the food. The receiving and evaluation device is arranged outside the food. The transmission device and the sensor are supplied with energy from outside via radio waves, in particular via microwave energy. When determining the temperature, the transmission frequency of the temperature sensor is changed proportionally to the temperature, ie the transmission frequency serves as an analog signal from the transmitter. With this technology it would be difficult or even impossible to operate or read several sensors in parallel at the same time.

Die nicht vorveröffentlichte EP 1 726 882 A1 beschreibt ein Gargerät mit Temperaturerfassungsvorrichtung und einer Temperaturmesseinrichtung mit einer mobilen Einheit aus einem Temperatursensor und einem RFID-Transponder, die mit einer Sende-Empfangs-Einheit drahtlos gekoppelt ist. Der Temperatursensor kann in der Art eines Bratenspießes in festes Gargut eingeführt werden.The not pre-published EP 1 726 882 A1 describes a cooking appliance with a temperature detection device and a temperature measuring device with a mobile unit comprising a temperature sensor and an RFID transponder, which is wirelessly coupled to a transmitter / receiver unit. The temperature sensor can be inserted into solid food like a skewer.

Aus der US 4 5557 608 A ist eine Vorrichtung zum Messen von Strömungen im Ozean offenbart, bei der Temperatursensoren einer Anordnung zwischen einem Anker und einem Schwimmkörper Ozean gehalten werden und Daten über ein Kabel an eine Drahtlosübertragungseinrichtung, die an einer Oberflächenboje befestigt ist, senden, sodass die Drahtlosübertragungseinrichtung die Daten an einen Empfänger auf einem Schiff weiterleiten kann.From the U.S. 4,557,608 A An apparatus for measuring ocean currents is disclosed, in which temperature sensors of an arrangement between an anchor and a float are held ocean and send data via a cable to a wireless transmission device attached to a surface buoy, so that the wireless transmission device sends the data to a Can forward recipients on a ship.

Die JP S58 173193 U offenbart eine Vorrichtung zum Bestimmen der Temperatur eines Lebensmittels, wobei die Vorrichtung eine mobile Einheit aufweist, die einen Temperatursensor und eine Übertragungseinrichtung enthält und als Schwimmkörper ausgebildet ist. WO 2005017476 ist auch Stand der Technik.The JP S58 173193 U discloses a device for determining the temperature of a food, the device having a mobile unit which contains a temperature sensor and a transmission device and is designed as a floating body. WO 2005017476 is also state of the art.

Es sind weiterhin sogenannte Bratenthermometer bekannt, die in das Medium einsteckbar sind, beispielsweise mit Hilfe eines Spießkörpers, und die Temperatur im Inneren des Mediums messen können. Diese Bratenthermometer sind jedoch bislang nur zum Ablesen eingerichtet oder erfordern, wie es in der EP-A-1 199 528 beschrieben ist, eine Steckdose im Inneren des Garraums und gegebenenfalls eine Verkabelung. Aber auch hier ist somit der Einsatzbereich auf das Backrohr beschränkt.So-called roast thermometers are also known which can be inserted into the medium, for example with the aid of a skewer body, and can measure the temperature inside the medium. However, these meat thermometers have so far only been set up for reading or require, as in the EP-A-1 199 528 is described, a socket in the interior of the oven and, if necessary, wiring. But here too the area of application is limited to the oven.

Der Erfindung liegt somit die Aufgabe zugrunde, eine Vorrichtung zum Bestimmen der Temperatur eines Mediums mit einem erweiterten Einsatzbereich zu schaffen.The invention is therefore based on the object of creating a device for determining the temperature of a medium with an extended range of use.

Die Aufgabe wird durch die im Anspruch 1 angegebenen Merkmale gelöst.The object is achieved by the features specified in claim 1.

Durch die Ausbildung einer mobilen Einheit, die zumindest den Temperatursensor und eine Übertragungseinrichtung enthält, kann die erfindungsgemäße Vorrichtung universell und für jedes Kochgefäß eingesetzt werden. Darüber hinaus ist eine wesentlich aussagekräftigere Temperaturmessung möglich, da die Temperatur direkt im Inneren des Mediums gemessen werden kann.By designing a mobile unit which contains at least the temperature sensor and a transmission device, the device according to the invention can be used universally and for every cooking vessel. In addition, a significantly more meaningful temperature measurement is possible, since the temperature can be measured directly inside the medium.

Vorteilhafte Weiterbildungen der Erfindung sind den Unteransprüchen zu entnehmen.Advantageous further developments of the invention can be found in the subclaims.

Die mobile Einheit ist mit geeigneten Vorrichtungen versehen, die insbesondere den Temperatursensor an einer Stelle halten, wo eine Temperaturmessung besonders sinnvoll und aussagekräftig ist, was durch einen Schwimmkörper erreicht wird, der den Temperatursensor in der Mitte eines flüssigen Mediums hält und beispielsweise verhindert, dass dieser auf den sehr heißen Gefäßboden absinkt.The mobile unit is provided with suitable devices, which in particular hold the temperature sensor in a place where a temperature measurement is particularly useful and meaningful, which is achieved by a floating body that holds the temperature sensor in the middle of a liquid medium and prevents it, for example sinks to the very hot bottom of the vessel.

Die mobile Einheit kann weiterhin einen Sensorkörper enthalten, der direkt an einem Medium anbringbar ist, beispielsweise als Spieß ausgebildet ist, der in das Medium, beispielsweise einen Braten, eingesteckt werden kann.The mobile unit can also contain a sensor body that can be attached directly to a medium, for example designed as a skewer, which can be inserted into the medium, for example a roast.

Erfindungsgemäß enthält die Übertragungseinrichtung ein System für eine berührungslose Datenerfassung auf der Basis der Radiofrequenztechnik, wie es beim handelsüblichen RFID-System der Fall ist. RFID ermöglicht die berührungslose Datenerfassung und besteht aus dem Datenträger (jeweils ein Chip und eine Antenne in einem Träger - RFID-tag) und einem Lesegerät (bestehend aus einer Antenne und einem Decoder). Zur Datenübertragung werden magnetische oder elektromagnetische Felder eingesetzt. Der RFID-tag ist in der Lage, auch ohne eigene Stromversorgung in einem niederfrequenten Feld Informationen auszusenden, wobei die Energie für das niederfrequente Feld vom Lesegerät bereitgestellt wird.According to the invention, the transmission device contains a system for contactless data acquisition on the basis of radio frequency technology, as is the case with the commercially available RFID system. RFID enables contactless data acquisition and consists of the data carrier (one chip and one antenna in each carrier - RFID tag) and a reader (consisting of an antenna and a decoder). Magnetic or electromagnetic fields are used for data transmission. The RFID tag is able to send information in a low-frequency field even without its own power supply, with the energy for the low-frequency field being provided by the reader.

Die Empfangs- und Auswerteinrichtung kann für die unterschiedlichsten Aufgaben ausgebildet sein; beispielsweise kann ein Alarm ausgelöst werden, wenn vorbestimmteGrenzwerte überschrittenwerden, es kanndieAnzeigederfestgestellten Temperaturerfolgen, es kann eine manuelle Eingabeeinrichtung vorgesehen sein, mitderder Benutzer in der Lage ist, beispielsweise Grenzwerte einzugeben, es kann ein Zeitgebervorgesehen sein, und es kann eine Steuereinrichtung vorgesehen sein, die eine Heizquelle für das Medium steuert.The receiving and evaluating device can be designed for a wide variety of tasks; for example an alarm can be triggered when predetermined limit values exceeded, the temperature determined can be displayed, a manual input device can be provided with which the user is able to enter limit values, for example, a timer can be provided and a control device can be provided which controls a heating source for the medium.

Ausführungsbeispiele der Erfindung werden nachfolgend anhand der Zeichnungen näher erläutert. Es zeigen:

Fig. 1
eine schematische Darstellung eines ersten Ausführungsbeispiels einer erfindungsgemäßen Vorrichtung,
Fig. 2
eine schematische Darstellung eines zweiten Ausführungsbeispiels einer erfindungsgemäßen Vorrichtung,
Fig. 3
ein Blockschaltbild eines RFID-tag,
Fig. 4
ein erstes Ausführungsbeispiel einer mobilen Einheit, und
Fig. 5
ein zweites Ausführungsbeispiel einer mobilen Einheit.
Exemplary embodiments of the invention are explained in more detail below with reference to the drawings. Show it:
Fig. 1
a schematic representation of a first embodiment of a device according to the invention,
Fig. 2
a schematic representation of a second embodiment of a device according to the invention,
Fig. 3
a block diagram of an RFID tag,
Fig. 4
a first embodiment of a mobile unit, and
Fig. 5
a second embodiment of a mobile unit.

Fig. 1 zeigt in schematischer Blockdarstellung eine erfindungsgemäße Vorrichtung 1 zum Bestimmen der Temperatur eines Mediums. Die erfindungsgemäße Vorrichtung kann für die unterschiedlichsten Verwendungszwecke eingesetzt werden, eignet sich jedoch insbesondere zum Bestimmen der Temperatur von Lebensmitteln, die zum Zwecke der Zubereitung erhitzt werden. Die Vorrichtung 1 enthält eine temperaturbeständig ausgestaltete, mobile Einheit 2, die im dargestellten Ausführungsbeispiel einen Temperaturfühler 3 und eine Übertragungseinrichtung 4 enthält. Die Übertragungseinrichtung 4 ist ein RFID-tag, d.h. ein Chip 4a mit Antenne 4b, wie in Fig. 3 näher dargestellt. Im dargestellten Ausführungsbeispiel enthält der Chip 4a neben den herkömmlichen und für diese Chips üblichen Bestandteilen, einen integrierten Temperatursensor 3 und ggf. zusätzlich einen Drucksensor (nicht dargestellt), durch den beispielsweise festgestellt werden kann, ob sich die mobile Einheit 2 im Medium befindet. Fig. 1 shows a schematic block diagram of a device 1 according to the invention for determining the temperature of a medium. The device according to the invention can be used for the most varied of purposes, but is particularly suitable for determining the temperature of foods that are heated for the purpose of preparation. The device 1 contains a temperature-resistant, mobile unit 2 which, in the exemplary embodiment shown, contains a temperature sensor 3 and a transmission device 4. The transmission device 4 is an RFID tag, ie a chip 4a with antenna 4b, as in FIG Fig. 3 shown in more detail. In the exemplary embodiment shown, the chip 4a contains the conventional components customary for these chips, an integrated temperature sensor 3 and possibly also a pressure sensor (not shown), which can be used to determine, for example, whether the mobile unit 2 is in the medium.

Die erfindungsgemäße Vorrichtung enthält weiterhin eine Empfangs- und Auswerteinrichtung 6, die von der mobilen Einheit 2 getrennt angeordnet werden kann und drahtlos mit der mobilen Einheit 2 in Verbindung steht. Die Empfangs- und Auswerteinrichtung 6 enthält die üblicherweise für den RFID-tag (RFID Transponder) benötigten Bauteile, beispielsweise eine Antenne 7 und ein RFID-Lesegerät 8 (RFID Reader), mit dem beispielsweise der RFID-tag mit Energie versorgt, identifiziert und die vom Temperatursensor 3 festgestellte Temperatur gelesen werden kann. Es ist weiterhin eine Steuereinrichtung 9 zum Verarbeiten der erhaltenen Signale vorgesehen. Die Steuereinrichtung 9 ist mit einer manuellen Eingabeeinrichtung 10, beispielsweise einer Tastatur, verbunden, durch die der Benutzer Betriebsparameter vorgeben kann. Weiterhin ist ein nicht gezeichneter Zeitgeber und eine Anzeigeeinrichtung 11, beispielsweise ein Display, vorgesehen, um relevante oder ausgewählte Parameter anzuzeigen, wie beispielsweise die Identifikation der mobilen Einheit 2, eine Solltemperatur, eine aktuelle Temperatur, die abgelaufene oder die noch zur Verfügung stehende Zeit, die manuellen Eingaben usw. Es ist weiterhin eine Alarmeinrichtung 12 vorgesehen, durch die ein Alarm bei vorbestimmten Betriebszuständen, beispielsweise der Überschreitung einer vorbestimmten Temperatur, dem Ablauf einer vorbestimmten Zeit oder dem Überschreiten einer vorbestimmten Temperatur für eine vorbestimmte Zeit oder dgl. ausgelöst werden kann. Der Alarm kann visuell und/oder akustisch erfolgen. Die Steuereinrichtung 9 enthält weiterhin einen Zeitgeber.The device according to the invention also contains a receiving and evaluation device 6, which can be arranged separately from the mobile unit 2 and is in wireless connection with the mobile unit 2. The receiving and evaluation device 6 contains the components usually required for the RFID tag (RFID transponder), for example an antenna 7 and an RFID reader 8 (RFID reader), with which the RFID tag is supplied with energy, for example, and the temperature detected by temperature sensor 3 can be read. A control device 9 is also provided for processing the signals received. The control device 9 is connected to a manual input device 10, for example a keyboard, by means of which the user can specify operating parameters. Furthermore, a timer (not shown) and a display device 11, for example a display, are provided in order to display relevant or selected parameters, such as the identification of the mobile unit 2, a target temperature, a current temperature, the time that has elapsed or the time that is still available, manual inputs, etc. An alarm device 12 is also provided by which an alarm can be triggered in the event of predetermined operating conditions, for example when a predetermined temperature has been exceeded, a predetermined time has elapsed or a predetermined temperature has been exceeded for a predetermined time or the like. The alarm can be visual and / or acoustic. The control device 9 also contains a timer.

Im Betrieb wird die mobile Einheit 2 in das Medium, z.B. in ein Kochgut in einem Kochgefäß, eingebracht und die Empfangs- und Auswerteinrichtung 6 an geeigneter Stelle außerhalb des Mediums, also z.B. an einem Herd, angeordnet. Durch die Empfangs- und Auswerteinrichtung kann zyklisch oder nur auf Anforderung ein niederfrequentes Feld erzeugt werden, das die Übertragungseinrichtung 4 veranlasst, seine Identität sowie die vom Sensor 3 festgestellte Temperatur und gegebenenfalls Informationen über den vom Drucksensor festgestellten Druck zu senden. Diese Signale werden durch die Steuereinrichtung 9 in der gewünschten Weise verarbeitet. So ist es beispielsweise möglich, nur die Temperatur anzuzeigen und gegebenenfalls einen Alarm auszulösen, wenn eine manuell über die Eingabeeinrichtung 10 eingegebene Temperatur überschritten wird, und zwar wahlweise entweder sofort oder erst nach Ablauf einer vorbestimmten Zeitdauer.During operation, the mobile unit 2 is placed in the medium, for example in a cooking item in a cooking vessel, and the receiving and evaluation device 6 is arranged at a suitable location outside the medium, for example on a stove. The receiving and evaluation device can generate a low-frequency field cyclically or only on request, which causes the transmission device 4 to send its identity and the temperature determined by the sensor 3 and possibly information about the pressure determined by the pressure sensor. These signals are processed by the control device 9 in the desired manner. For example, it is possible to only display the temperature and, if necessary, to trigger an alarm if a temperature entered manually via the input device 10 is exceeded, either immediately or only after a predetermined period of time.

Die mobile Einheit 2 und die Empfangs- und Auwerteinrichtung 6, mit oder ohne Alarmeinrichtung 12, kann jedoch auch, wie Fig. 2 zeigt, mit einer Steuereinheit 13 zu einer Vorrichtung 1' kombiniert werden, die in der Lage ist, aktiv auf den Temperaturverlauf einzuwirken, indem sie eine Heizquelle 14 zum Aufheizen des Mediums steuert. Zu diesem Zweck ist die Steuereinheit 13 mit der Steuerung 9 verbunden, wobei über die Eingabeeinrichtung 10 der gewünschte Temperaturverlauf eingegeben wird, wenn er nicht vorab in der Steuerung abgespeichert wurde.The mobile unit 2 and the receiving and Auwerteinrichtung 6, with or without alarm device 12, can, however, as Fig. 2 shows, can be combined with a control unit 13 to form a device 1 'which is able to actively influence the temperature profile by controlling a heating source 14 for heating the medium. For this purpose, the control unit 13 is connected to the controller 9, the desired temperature profile being entered via the input device 10 if it has not been previously stored in the controller.

Die mobile Einheit 2 ist zur Anordnung und zu Gebrauch direkt am oder im Medium gedacht und kann auf die unterschiedlichste Art und Weise ausgebildet sein, um sicherzustellen, dass sie die Temperatur des Mediums optimal erfasst. Die mobile Einheit 2 kann zu diesem Zweck z.B. mit einem Sensorkörper versehen sein, der den Temperatursensor 3 enthält und an einem festen Medium angebracht wird, beispielsweise durch geeignete Befestigungsmittel wie Klammern oder dgl.. Die mobile Einheit 2 kann weiterhin, wie Fig. 4 zeigt, als sogenanntes Bratenthermometer 14, d.h. zum Einstecken in ein festes Medium, ausgebildet sein. Das Bratenthermometer 14 enthält zu diesem Zweck einen Spießkörper 15, in dem der Temperatursensor 3 untergebracht ist und einen Kopf 16, der die Antenne 4b und den Chip 4a der Übertragungseinrichtung 4 enthält. Der Kopf 16 ist bevorzugt so ausgebildet, dass die Übertragungseinrichtung 4 gegen eine übermäßige Erwärmung geschützt ist.The mobile unit 2 is intended to be arranged and used directly on or in the medium and can be designed in the most varied of ways in order to ensure that it optimally detects the temperature of the medium. For this purpose, the mobile unit 2 can for example be provided with a sensor body which contains the temperature sensor 3 and is attached to a solid medium, for example by suitable fastening means such as clips or the like Fig. 4 shows, be designed as a so-called meat thermometer 14, ie for insertion into a solid medium. For this purpose, the meat thermometer 14 contains a skewer body 15 in which the temperature sensor 3 is accommodated and a head 16 which contains the antenna 4b and the chip 4a of the transmission device 4. The head 16 is preferably designed so that the transmission device 4 is protected against excessive heating.

Die erfindungsgemäße mobile Einheit 2 ist für fließfähige bzw. flüssige Medien in Form eines Schwimmers 17 ausgebildet, der einen Schwimmkörper 17a aus einem schwimmfähigen Material, beispielsweise einem temperaturbeständigen Schaummaterial, enthält, in dem temperaturgeschützt die Antenne 4b und der Chip 4a eingebettet sind. Der Temperatursensor 3 liegt bevorzugt an einer Oberfläche des Schwimmkörpers 17 frei, damit eine ungehinderte Temperaturmessung möglich ist.The mobile unit 2 according to the invention is designed for flowable or liquid media in the form of a float 17 which contains a float 17a made of a floatable material, for example a temperature-resistant foam material, in which the antenna 4b and the chip 4a are embedded in a temperature-protected manner. The temperature sensor 3 is preferably exposed on a surface of the floating body 17 so that an unhindered temperature measurement is possible.

Die mobile Einheit 2 kann weiterhin auch als Kombination des Bratenthermometers und Schwimmers ausgebildet sein, so dass sie universell sowohl in flüssigen Medien, d.h. in Medien, in denen der Schwimmkörper schwimmen kann, als auch in festen Medien, d.h. in Medien, in denen ein eingesteckter Spießkörper 15 oder eine Klammer oder dgl. hält, verwendet werden kann.The mobile unit 2 can also be designed as a combination of the meat thermometer and float, so that it can be used universally both in liquid media, ie in Media in which the floating body can swim, as well as in solid media, ie in media in which an inserted spear body 15 or a clip or the like holds, can be used.

Die Erfindung ist außer bei Kochgeräten auch für alle anderen Einsatzzwecke, beispielsweise in der Labor- oder Prozesstechnik und für Temperaturüberwachungen jeglicher Art, d.h. sowohl für ein Erhitzen als auch für ein Abkühlen einsetzbar.In addition to cooking appliances, the invention is also suitable for all other uses, for example in laboratory or process technology and for temperature monitoring of any kind, i.e. can be used for both heating and cooling.

Claims (8)

  1. An arrangement (1, 1') for determining the temperature of a foodstuff,
    having a wireless transmission device (4) with a temperature sensor (3) and
    having a receiving and evaluating device (6) provided exterior to the transmission device (4),
    wherein the transmission device (4) with the temperature sensor (3) is in the form of a mobile unit (2) for direct temperature measurement in or on the foodstuff and
    the receiving and evaluating device (6) is configured to be arranged exterior to the foodstuff,
    wherein the mobile unit (2) comprises a floating body (17a),
    characterised in that the transmission device (4) comprises an RFID tag and the receiving and evaluating device (6) comprises an RFID reading and evaluating device (8) with integrated current supply.
  2. An arrangement according to claim 1, characterised in that in addition to the floating body (17a), the mobile unit (2) comprises a sensor body (15) attachable to a solid foodstuff.
  3. An arrangement according to claim 2, characterised in that the sensor body (15) is in the form of a skewer insertable into the foodstuff.
  4. An arrangement according to any one of claims 1 to 3, characterised in that the receiving and evaluating device (6) comprises an alarm device (12).
  5. An arrangement according to any one of claims 1 to 4, characterised in that the receiving and evaluating device (6) comprises a display device (11).
  6. An arrangement according to any one of claims 1 to 5, characterised in that the receiving and evaluating device (6) comprises a manual input device (10).
  7. An arrangement according to any one of claims 1 to 6, characterised in that the receiving and evaluating device (6) comprises a timer.
  8. An arrangement according to any one of claims 1 to 7, characterised in that the receiving and evaluating device (6) comprises a control unit (13) to control a heat source (14) for the foodstuff.
EP06014765.9A 2006-07-14 2006-07-14 Device to determine the temperature of a medium Not-in-force EP1879428B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP06014765.9A EP1879428B1 (en) 2006-07-14 2006-07-14 Device to determine the temperature of a medium
JP2009518733A JP2009544005A (en) 2006-07-14 2007-06-12 Medium temperature measuring device
US12/307,163 US8274392B2 (en) 2006-07-14 2007-06-12 Apparatus for determining the temperature of a medium
PCT/EP2007/005186 WO2008006433A1 (en) 2006-07-14 2007-06-12 Apparatus for determining the temperature of a medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06014765.9A EP1879428B1 (en) 2006-07-14 2006-07-14 Device to determine the temperature of a medium

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EP1879428B1 true EP1879428B1 (en) 2020-11-18

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US8274392B2 (en) 2012-09-25
EP1879428A1 (en) 2008-01-16
US20090315727A1 (en) 2009-12-24
JP2009544005A (en) 2009-12-10

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