WO2005020192A1 - Etiquette a balayage radio permettant le controle d'une chaine du froid - Google Patents

Etiquette a balayage radio permettant le controle d'une chaine du froid Download PDF

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Publication number
WO2005020192A1
WO2005020192A1 PCT/EP2004/009107 EP2004009107W WO2005020192A1 WO 2005020192 A1 WO2005020192 A1 WO 2005020192A1 EP 2004009107 W EP2004009107 W EP 2004009107W WO 2005020192 A1 WO2005020192 A1 WO 2005020192A1
Authority
WO
WIPO (PCT)
Prior art keywords
radio
label
tag
interrogable
substrate
Prior art date
Application number
PCT/EP2004/009107
Other languages
German (de)
English (en)
Inventor
Gerhard Neumann
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2005020192A1 publication Critical patent/WO2005020192A1/fr

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/0716—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising a sensor or an interface to a sensor
    • G06K19/0717—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising a sensor or an interface to a sensor the sensor being capable of sensing environmental conditions such as temperature history or pressure
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/06—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using melting, freezing, or softening

Definitions

  • Radio-interrogable label in particular for checking a continuous cold chain when transporting or storing chilled or frozen food
  • the invention relates to a radio-interrogable label for contactless interrogation with a read / write device and with at least one microcontroller, which is connected to an antenna.
  • the invention further relates to the use of such a label in the food industry and to an identification system with a read / write device and at least one radio-questionable label.
  • a temperature-dependent material and a label for application to temperature-sensitive foods is known, which is provided with such a material.
  • the material is provided with a dye and has a large number of so-called microcapsules, which burst when the label is printed. When a predeterminable temperature is exceeded, the material liquefies and dissolves to form a colored trace, which indicates that the predeterminable temperature has been exceeded.
  • Temperature-sensitive foods include cold food such as Dairy products, vegetables etc. as well as frozen foods such as frozen fish, frozen meat etc. understood.
  • the disadvantage here is that with a large number of superimposed foods, such as, for example, during the transport of the foods in a container, during storage in a food store or during the sales display, the critical storage temperature of a food is exceeded is not recognizable at a glance. In this case the are temperature sensitive To inspect food individually by hand, and to sort out foods that have a trace of color. This is cumbersome, error-prone and time-consuming.
  • the radio-questionable label has at least one microcontroller with electrical means, an antenna that is electrically connected to the microcontroller, and one or more temperature measurement lines.
  • the temperature measuring cells are electrically connected to the microcontroller and irreversibly change their electrical properties when a respective predeterminable temperature is exceeded.
  • the electrical means of the label detect the respective change in the electrical property, determine a maximum temperature value exceeded and send a corresponding data value to the read / write device.
  • the microcontroller is an advantageous possible embodiment of an electronic control unit for controlling the radio-questionable label.
  • the electrical means are e.g. a microprogram or a software routine, which e.g. be carried out by an electronic switching mechanism of the microcontroller.
  • a large number of temperature measuring cells can advantageously be used to determine the degree of temperature overshoot, and, if the temperature is critical for the respective food, is slightly exceeded, it can also be offered as a discounted product or as a product with a shortened expiry date.
  • the temperature measuring cells have a substrate with a minimum conductivity, which melts when a predetermined temperature is exceeded.
  • a change in resistance can e.g. be measured using an analog comparator circuit.
  • a change in electrical capacity can e.g. can be measured by measuring the associated time at a constant charging current of the capacitance and comparing it with a reference value.
  • the substrate for detecting the respective change in the electrical property forms at least one conductive connection between at least two conductive electrodes if the substrate has a wetting effect in the molten state.
  • the substrate connects at least two conductive electrodes to detect the respective change in the electrical property, at least one conductive connection being interrupted if the substrate does not have a wetting effect in the molten state.
  • Liquid and carrier For example, a certain roughness of the wearer, e.g. in the case of a fleece, the wetting process due to the capillary effect.
  • the respective temperature measuring cell has a changed electrical capacitance and / or a changed electrical resistance as a detectable change in the electrical properties when at least one electrical connection is formed or interrupted.
  • a change in the electrical resistance can advantageously be measured if the substrate contains a small proportion of a conductive substance, in particular a salt dissolved in water, e.g. NaCl, or has an electrolyte. If an electrical connection between two conductive electrodes is interrupted by contraction of the substrate during melting, a measuring current impressed between the two electrodes is also interrupted.
  • a hydrocarbon such as e.g. an alkane, in particular a dodecane, can be used.
  • the respective substrate of a temperature measuring cell has a different one
  • Melting temperature such as in a temperature range from -25 ° C to 10 ° C.
  • a temperature range for example, for frozen foods such as for fish or seafood, it is important to determine whether a temperature of -18 ° C has been exceeded.
  • dairy products for example, it is important to exceed a temperature of 6 ° C.
  • a temperature range in 1 ° C steps around a critical temperature "around" can be useful. For the deep-freeze mentioned above, this would be, for example, nine temperature cells with a measuring range of -22 ° C, -21 ° C, .., -15 ° C, -14 ° C.
  • alkanes with different valences and with different melting temperatures such as undecane, tridecane, tetradecane, pentadecane, etc., or mixtures of these can be used in order to be able to set a predefinable melting point as precisely as possible.
  • Another possibility is, for example, to determine the melting temperature of the substrate
  • volume ratio of a hydrocarbon and a conductive substance to set
  • the substrate has a dye. This can also be optically advantageous
  • Exceeding a predeterminable critical temperature can be determined by the colored substrate.
  • the substrate is embedded in microcapsules with a diameter in a range from 1 to 50 ⁇ m.
  • the microcapsules preferably have a shell made of gelatin or of a material with comparable physical properties.
  • the substrate can be applied to the radio-questionable label during production, even at room temperature.
  • the previously exemplary hydrocarbons of the substrate are in the liquid state, the substrate is prevented from flowing or contracting through the shell of the microcapsules.
  • the effect of the substrate to form a possible change in the electrical properties of a Temperature measuring cell can advantageously only be enabled or initiated when the radio-questionable label has been attached to or on a refrigerated or frozen food item to be monitored and the radio-questionable label itself has then cooled below the temperature to be monitored.
  • the microcapsules burst by means of mechanical pressure on, for example, a specially marked optical marking of the radio-questionable label. If the temperature to be monitored were exceeded, the substrate would now advantageously flow away or contract.
  • microcapsules with a diameter in a range from 5 to 10 ⁇ m have been found to be advantageous.
  • the circuit elements of the radio-questionable label consist mainly of organic compounds which can be printed on a plastic carrier layer of the radio-questionable label.
  • Such flexible transponders are also referred to as "smart labels” or “integrated plastic chips” (IPC).
  • the printable organic compounds are conductive, insulating or semiconducting with regard to their electrical properties.
  • the conductor tracks applied to the plastic carrier layer and / or the circuit elements made of mainly organic connections that can be printed on the plastic carrier layer have e.g. a thickness of 30 ⁇ m.
  • the energy and data transmission between the transponder and the read / write device is preferably carried out in an inductively coupled manner.
  • radio questionable labels are flexible and can be offered as "tear-off goods", rolled up on a roll.
  • the substrate is preferably embedded between two flat and electrically insulating layers and surrounded by at least two conductive electrodes.
  • the flat and electrically insulating layers and the adjacent electrically conductive electrodes thus form a closed chamber or a reservoir for the embedded substrate.
  • the substrate is thus protected from environmental influences.
  • At least one of the conductive electrodes forms a channel.
  • this channel acts like a capillary tube. The substrate flows through this tube and at the end of the
  • Channel creates a conductive connection in a contact area with another conductive electrode.
  • a previously filled or printed channel can correspondingly empty during melting and dissolve a previously existing conductive connection.
  • an electrically conductive fuse layer is installed, printed or can be inserted there in the channel.
  • This securing position seals the channel.
  • this securing position which i.Vgl. to the flat and low-resistance conductive layers of the electrodes is high-resistance, release the channel by means of a current pulse.
  • the fuse position acts like an electrical fuse, which "burns out” in the event of overcurrent and irreversibly destroys the membrane separating the channel.
  • the fuse channel is advantageously connected to at least two of the conductive electrodes.
  • a current pulse can then enter the microcontroller via further electrical means Safety channel can be fed.
  • Successful "burnout" of the fuse layer can be queried by querying one of the electrically conductive electrodes when it is connected to the fuse layer. If necessary, for example if the fuse position has not yet been destroyed, a further current pulse can be fed in controlled by the microcontroller.
  • the data and energy transmission is preferably carried out by inductively coupled means, e.g. based on the ISO / IEC 15693 or 14443 standard.
  • the electronic circuit parts of the radio-interrogable label are advantageously supplied with electrical energy for the duration of the data transmission and for the duration of the data reception via the magnetic field emitted by the read / write device.
  • a battery in the radio-interrogable label can advantageously be dispensed with.
  • At least the maximum temperature value exceeded can be determined in the temperature measuring cells and a corresponding data value can be received.
  • a command from the read / write device can be sent to the microcontroller of the radio-interrogable label to release the above-mentioned fuse position in the channel in one or more temperature measuring cells.
  • This is preferably done by feeding the electrical energy stored in the resonant circuit from the antenna coil and from the storage capacitor.
  • the entire energy content of the storage capacitor can be connected to the associated electrodes of the fuse position as a short current pulse with a relatively high current value of a few amperes via a transistor that can be controlled by the microcontroller.
  • the above Labels which can be queried by radio can be used in an identification system with a read / write device and can also be used advantageously in the food industry.
  • FIG. 1 shows an exemplary structure of a radio-interrogable label on an inductively coupled basis in a top view
  • FIG. 2 shows an exemplary measuring circuit for detecting the changed resistance of a temperature measuring cell
  • FIG. 3 shows an exemplary structure of a temperature measuring cell with a securing position according to the invention in a plan view
  • FIG. 4 the exemplary temperature measuring cell from FIG. 3 in a sectional view.
  • 1 shows a top view of an example of a structure of a radio-questionable label TAG on an inductively coupled basis, which can be queried or read out by means of a read / write device (not shown).
  • a microcontroller MC in particular an RFID chip, can be seen inside the radio-questionable tag TAG.
  • a spiral coil antenna ANT is connected to this.
  • the coil antenna ANT and MikrocontroUer MC form a so-called transponder TAG.
  • the coil antenna ANT itself consists of a conductor track applied, for example vapor-deposited, on a carrier layer.
  • the microcontroller MC is also connected to temperature measuring cells T1-TN via connecting lines +, -, ln.
  • the temperature measuring cells Zl-Zn are also surrounded by a measuring circuit MB (not shown further) in order to enable them to be read out.
  • the positive and negative supply voltage are designated with + and -.
  • FIG. 2 shows an exemplary measuring circuit for detecting the changed resistance R of a temperature measuring cell ZI.
  • the temperature measuring cell ZI was shown as a resistor.
  • the reference symbol Tl which is entered to the right and subscripted to the reference symbol R, is intended to indicate the temperature Tl at which the resistance R of the temperature measuring cell Tl changes irreversibly according to the invention.
  • a self-conducting transistor TR which acts like a load resistor, is connected in series with the temperature measuring cell ZI for measurement purposes.
  • the measuring circuit is supplied via the two supply voltages +, -, A2.
  • the voltage drop across the temperature measuring cell ZI is evaluated via connection 1, AI fed back to the microcontroller MC.
  • FIG. 3 shows an exemplary structure of a temperature measuring cell Zl-Zn with a securing position SI according to the invention in a plan view.
  • the electrical circuit elements, electrodes AI, A2, A3, LFl, LF2 TL etc. are made of an organic material and printed on an insulating carrier layer TL.
  • the electrical connections A1-A3 to the microcontroller MC are designed as electrically conductive electrodes, ie as electrically conductive surfaces LF1, LF2.
  • a substrate SUB Inside the temperature measuring cell Zl-Zn is a substrate SUB according to the
  • the substrate SUB is enclosed by two conductive electrodes A2, A3, these forming a channel KAN toward the right side of the figure.
  • the channel KAN is separated from the actual reservoir of the substrate SUB by a securing layer SI (see FIG. 4).
  • a gap LU is also shown between the two electrodes A2, A3 for electrical isolation.
  • this space is filled by the overlying and also printable electrically insulating insulation layer ISO. In this way, the entire inner space is filled and sealed with the substrate SUB.
  • a current pulse is now passed through the connections A2, A3, it flows through the fuse position SI and destroys it.
  • the substrate SUB now flows into the channel KAN.
  • the substrate SUB now electrically connects the electrodes A2, A3 to the electrode AI if it has a certain electrical conductivity.
  • the electrically established connection can now be measured using the line AI, 1 fed back to the microcontroller MC.
  • the substrate SUB consists of microcapsules, which are burst after reaching a temperature below a predeterminable temperature Tl-Tn, for example by means of a mechanical pressure. As a result, the actual temperature monitoring process is only started.
  • FIG. 4 finally shows the exemplary temperature measuring cell Zl-Zn from FIG. 3 in a sectional illustration.
  • the separating effect of the securing layer SI with respect to the substrate SUB can be clearly seen.
  • the direction of the arrow shows the direction in which the substrate SUB would spread in the channel KAN if the fuse layer SI was severed.
  • the two electrical connections A2, AI would then be electrically connected in the contact area KB.
  • Figure 4 that is
  • Substrate SUB with microcapsules not yet mechanically burst is shown.

Abstract

L'invention concerne une étiquette à balayage radio (TAG) permettant un balayage sans contact au moyen d'un appareil de lecture/écriture et d'au moins un microcontrôleur (MC), pourvu de moyens électriques et relié à une antenne (ANT). Cette étiquette à balayage radio présente un ou plusieurs capteurs de température (Z1-Zn). Ces capteurs de température sont reliés électriquement au microcontrôleur et modifient leur caractéristique électrique (R, C) de façon irréversible lorsqu'une température prescrite associée (T1-Tn) est dépassée. Les moyens électriques de l'étiquette détectent la modification respective de la caractéristique électrique, déterminent une valeur de température dépassée maximale et transmettent une valeur de données correspondante à l'appareil de lecture/écriture. Selon un mode de réalisation particulier, le capteur de température présente un substrat (SUB) à microcapsules. Le processus de mesure peut être engagé au moyen d'une impulsion de courant par l'intermédiaire d'une couche de sécurité (SI) délimitant le substrat.
PCT/EP2004/009107 2003-08-19 2004-08-13 Etiquette a balayage radio permettant le controle d'une chaine du froid WO2005020192A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2003138076 DE10338076A1 (de) 2003-08-19 2003-08-19 Funkabfragbares Etikett, insbesondere zur Kontrolle einer durchgehenden Kühlkette beim Transport oder bei der Lagerung von gekühlten bzw. tiefgekühlten Lebensmitteln
DE10338076.0 2003-08-19

Publications (1)

Publication Number Publication Date
WO2005020192A1 true WO2005020192A1 (fr) 2005-03-03

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Application Number Title Priority Date Filing Date
PCT/EP2004/009107 WO2005020192A1 (fr) 2003-08-19 2004-08-13 Etiquette a balayage radio permettant le controle d'une chaine du froid

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DE (1) DE10338076A1 (fr)
WO (1) WO2005020192A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005041495A1 (de) * 2005-09-01 2007-03-08 Eberhard-Karls-Universität Tübingen Temperatursensor
DE102006011737A1 (de) * 2006-03-14 2007-09-20 Siemens Ag Einrichtung zur Erfassung einer unzulässigen Über- oder Unterschreitung einer einem temperatursensiblen Gegenstand zugeordneten Maximal- oder Minimaltemperatur
DE102009055406B3 (de) * 2009-12-30 2011-05-05 Deutsche Post Ag Vorrichtung und Verfahren zur Aufnahme von Messdaten einer Messgröße
AT511076B1 (de) * 2011-06-10 2012-09-15 Univ Graz Tech Verfahren und vorrichtung zum erfassen der temperaturgeschichte eines verderblichen produktes
DE102012110571A1 (de) * 2012-11-05 2014-05-08 Christian Lenz Einrichtung für Produkte insbesondere für Arzneimittel und/oder Nahrungsmittel
DE102013102622B4 (de) * 2013-03-14 2021-01-28 Schreiner Group Gmbh & Co. Kg Temperatursensor, Etikett und Verfahren
DE102020118908A1 (de) 2020-07-16 2022-01-20 Testo SE & Co. KGaA Temperaturmessvorrichtung
DE102020128493A1 (de) 2020-10-29 2022-05-05 Endress+Hauser SE+Co. KG Verfahren zum Überwachen eines Überschreitens einer Grenztemperatur und Feldgerät der Automatisierungstechnik

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0250217A2 (fr) * 1986-06-18 1987-12-23 THE GENERAL ELECTRIC COMPANY, p.l.c. Dispositifs sensibles à la température
EP0276335A1 (fr) * 1987-01-24 1988-08-03 Allied Corporation Dispositif et méthode indicateur de l'environnement
US20020047781A1 (en) * 1997-06-18 2002-04-25 Michel Fallah Electronic label

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0250217A2 (fr) * 1986-06-18 1987-12-23 THE GENERAL ELECTRIC COMPANY, p.l.c. Dispositifs sensibles à la température
EP0276335A1 (fr) * 1987-01-24 1988-08-03 Allied Corporation Dispositif et méthode indicateur de l'environnement
US20020047781A1 (en) * 1997-06-18 2002-04-25 Michel Fallah Electronic label

Also Published As

Publication number Publication date
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