WO2006108725A1 - Device for monitoring environmental conditions and use of said device - Google Patents

Device for monitoring environmental conditions and use of said device Download PDF

Info

Publication number
WO2006108725A1
WO2006108725A1 PCT/EP2006/050613 EP2006050613W WO2006108725A1 WO 2006108725 A1 WO2006108725 A1 WO 2006108725A1 EP 2006050613 W EP2006050613 W EP 2006050613W WO 2006108725 A1 WO2006108725 A1 WO 2006108725A1
Authority
WO
WIPO (PCT)
Prior art keywords
environmental conditions
resonant circuit
capacitor
change
influencing
Prior art date
Application number
PCT/EP2006/050613
Other languages
German (de)
French (fr)
Inventor
Rüdiger Bertsch
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 WO2006108725A1 publication Critical patent/WO2006108725A1/en

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
    • 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
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card

Definitions

  • the invention relates to a device for monitoring environmental conditions, which has a radio-readable sensor element and which can be fastened in a simple manner on products to be monitored.
  • Dedicated gauges that have been shipped with or incorporated into the monitored products. These include so-called active RFID tags, ie a kind of identification labels with their own power supply, which can detect the desired parameters by appropriate sensors and transmit by radio.
  • active RFID tags ie a kind of identification labels with their own power supply
  • Such a device is known, for example, from the German patent application DE 101 30 991 A1.
  • the disadvantage here is, for example, that such a device, in particular for the individual monitoring of mass products is not possible or not economically reasonable.
  • the object underlying the invention is now to provide a device for monitoring environmental conditions, in which the above-mentioned disadvantages are avoided, which is as robust and reliable and their behavior or condition is already by a temporary Exceeding certain monitoring limits changes permanently.
  • the invention consists essentially of a so-called passive RFID tag, in which for generating an operating voltage, a receiving resonant circuit for high frequency energy is present and in which by exceeding certain environmental limits, a permanent detuning or deactivation is effected, so that a high-frequency excitation out no answer signal can be sent.
  • a passive RFID tag in which for generating an operating voltage, a receiving resonant circuit for high frequency energy is present and in which by exceeding certain environmental limits, a permanent detuning or deactivation is effected, so that a high-frequency excitation out no answer signal can be sent.
  • Figure 1 is an illustration of an unsuitable resonant circuit in an RFID tag
  • FIG. 2 shows a representation of a resonant circuit permanently detuned after exceeding the limit temperature in an RFID tag.
  • Passive RFIDs do not have their own power supply and, thanks to their simple design, can be used economically even for mass products.
  • the otherwise desired robustness of passive RFID tags against environmental influences is just selectively prevented by constructive measures.
  • the receiving resonant circuit is irreversibly "detuned" by the change of an environmental condition, so that the RFID tag is no longer ready to send
  • Detuning is understood as the change of the resonant frequency f Res of the resonant circuit, which is defined by an inductance L of the coil or antenna and a capacitance C of the capacitor.
  • the change of at least one environmental condition to be detected is effected according to the invention by influencing the inductance of the coil and / or the capacitance of the capacitor.
  • An advantageous possibility for influencing the inductance in this context is a change in the relative permeability and / or the capacitor a change in the relative permittivity.
  • Figures 1 and 2 show by way of example and schematically a temperature-dependent permanent change in the resonant frequency of an RFID resonant circuit due to permanent change in the dielectric contained in the resonant circuit capacitor.
  • FIG. 1 shows the structure of an unsocial resonant circuit SK1, the resonant circuit comprising an antenna coil L and a capacitor C1 connected in parallel with a porous dielectric D, which is connected via a liquid-empty capillary to a liquid container containing a liquid F1 having a temperature below contains a certain limit temperature.
  • FIG. 2 shows the structure of a detuned oscillating circuit SK2, wherein the resonant circuit again has an antenna coil L but a capacitor C2 connected in parallel with a liquid-permeated porous dielectric DF which is connected to a liquid container via a liquid-filled capillary contains a liquid F2 having a temperature above a certain limit temperature.
  • a certain desired temperature limit is, for example, by the length of the capillary K selectable.
  • the dielectric also remains trapped by the liquid at a subsequent decrease in temperature. This has the consequence that the RFID tag can no longer be read, since an energy input by excitation of the resonant circuit at its original resonant frequency fRes is no longer possible.
  • the absence of the response when reading such an RFID tag indicates that exceeding the defined temperature, e.g. an interruption of the cold chain or an overload condition of an engine has taken place.
  • the liquid can only change the relative dielectric constant between the capacitor plates or virtually cause a short circuit of the capacitor plates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

The invention essentially relates to a passive RFID tag (sk2). Said tag is equipped with a receiver oscillating circuit (L, c2) for high-frequency energy in order to generate an operating voltage, and a permanent detuning or deactivation occurs if the thresholds of certain environmental conditions are exceeded, said detuning or deactivation preventing a response signal from being transmitted again in reply to high-frequency excitation. Said device permits the environmental conditions or operating conditions of products to be continuously monitored with the aid of an advantageous passive RFID technology. A brief disruption of a cooling chain or the temporary overheating of a component can thus be identified easily and permanently.

Description

Beschreibungdescription
Vorrichtung zur Überwachung von Umweltbedingungen und deren VerwendungDevice for monitoring environmental conditions and their use
Die Erfindung betrifft eine Vorrichtung zur Überwachung von Umweltbedingungen, die ein per Funk lesbares Sensorelement aufweist und die in einfacher Weise auf zu überwachenden Produkten befestigbar ist.The invention relates to a device for monitoring environmental conditions, which has a radio-readable sensor element and which can be fastened in a simple manner on products to be monitored.
Bislang wird die Überwachung physikalischer Umgebungsbedingungen auf mehrere Arten durchgeführt:So far, the monitoring of physical environmental conditions is carried out in several ways:
• Dedizierte Messgeräte, die gemeinsam mit den zu überwachenden Produkten transportiert oder aber in diese eingebaut wurden. Hierzu gehören auch so genannte aktive RFID-Tags, also einer Art Identifikations-Etiketten mit eigener Stromversorgung, die durch entsprechende Sensorik die gewünschten Messgrößen erfassen und per Funk übermitteln können. Eine Solche Vorrichtung ist bspw. aus der deutschen Offenlegungsschrift DE 101 30 991 Al bekannt. Nachteilig ist dabei bspw., dass eine solche Vorrichtung, insbesondere für die Einzelüberwachung von Massenprodukten nicht möglich oder nicht wirtschaftlich sinnvoll ist.• Dedicated gauges that have been shipped with or incorporated into the monitored products. These include so-called active RFID tags, ie a kind of identification labels with their own power supply, which can detect the desired parameters by appropriate sensors and transmit by radio. Such a device is known, for example, from the German patent application DE 101 30 991 A1. The disadvantage here is, for example, that such a device, in particular for the individual monitoring of mass products is not possible or not economically reasonable.
• Zur Überwachung der Temperatur gibt es chemische Messstreifen, die einen irreversiblen Farbumschlag bei bestimmten Temperaturen zeigen.• To monitor the temperature, there are chemical gauges that show an irreversible color change at certain temperatures.
Nachteilig ist hierbei, dass diese Verfahren bislang nur für Temperaturbereiche zwischen ca. 3O0C und 25O0C existieren und keine maschinenlesbaren Ergebnisse bereitstellen.The disadvantage here is that these methods so far only for temperature ranges between about 3O 0 C and 25O 0 C exist and provide no machine-readable results.
Die der Erfindung zu Grunde liegende Aufgabe besteht nun darin eine Vorrichtung zur Überwachung von Umweltbedingungen anzugeben, bei der die oben genannten Nachteile vermieden werden, die möglichst robust und zuverlässig ist und deren Verhalten oder Zustand sich bereits durch eine temporäre Überschreitung bestimmter Überwachungsgrenzen dauerhaft ändert .The object underlying the invention is now to provide a device for monitoring environmental conditions, in which the above-mentioned disadvantages are avoided, which is as robust and reliable and their behavior or condition is already by a temporary Exceeding certain monitoring limits changes permanently.
Die Erfindung besteht im Wesentlichen aus einem so genannten passiven RFID-Tag, bei dem zur Erzeugung einer Betriebsspannung ein Empfangsschwingkreis für Hochfrequenzenergie vorhanden ist und bei dem durch Überschreitung von Grenzen bestimmter Umweltbedingungen eine dauerhafte Verstimmung oder Deaktivierung bewirkt wird, so dass auf eine Hochfrequenz- anregung hin kein Antwortsignal mehr gesendet werden kann. Durch eine solche Vorrichtung können Umgebungsbedingungen oder Betriebszustände von Produkten mit Hilfe einer günstigen passiven RFID Technologie lückenlos überwacht werden. Eine kurze Unterbrechung einer Kühlkette oder eine kurzfristige Überhitzung einer technischen Komponente ist bspw. so leicht und dauerhaft nachweisbar.The invention consists essentially of a so-called passive RFID tag, in which for generating an operating voltage, a receiving resonant circuit for high frequency energy is present and in which by exceeding certain environmental limits, a permanent detuning or deactivation is effected, so that a high-frequency excitation out no answer signal can be sent. By means of such a device, environmental conditions or operating states of products can be monitored completely using a low-cost passive RFID technology. A brief interruption of a cold chain or a short-term overheating of a technical component is, for example, so easily and permanently detectable.
Die Erfindung wird nun nachfolgend anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert. Dabei zeigtThe invention will now be explained in more detail with reference to embodiments shown in the drawing. It shows
Figur 1 eine Darstellung eines unverstimmten Schwingkreises in einem RFID-Tag undFigure 1 is an illustration of an unsuitable resonant circuit in an RFID tag and
Figur 2 eine Darstellung eines nach Grenztemperaturüberschreitung dauerhaft verstimmten Schwingkreises in einem RFID-Tag.FIG. 2 shows a representation of a resonant circuit permanently detuned after exceeding the limit temperature in an RFID tag.
Passive RFIDs besitzen keine eigene Stromversorgung und sind durch ihren einfachen Aufbau auch bei Massenprodukten wirtschaftlich einsetzbar. Bei der Erfindung wird die sonst angestrebte Robustheit von passiven RFID-Tags gegenüber Umwelteinflüssen durch konstruktive Maßnahmen gerade gezielt unterbunden.Passive RFIDs do not have their own power supply and, thanks to their simple design, can be used economically even for mass products. In the invention, the otherwise desired robustness of passive RFID tags against environmental influences is just selectively prevented by constructive measures.
Bei der Erfindung wird der Empfangsschwingkreis durch die Änderung einer Umweltbedingung irreversibel „verstimmt", so dass der RFID-Tag nicht mehr sendebereit ist. Unter Verstimmung versteht man die Änderung der Resonanzfrequenz fRes des Schwingkreises, die durch eine Induktivität L der Spule bzw. Antenne sowie einer Kapazität C des Kondensators definiert wird.In the invention, the receiving resonant circuit is irreversibly "detuned" by the change of an environmental condition, so that the RFID tag is no longer ready to send Detuning is understood as the change of the resonant frequency f Res of the resonant circuit, which is defined by an inductance L of the coil or antenna and a capacitance C of the capacitor.
jRes mit C-F C j Res with CF C
IKΛJLCIKΛJLC
Die zu detektierende Änderung mindestens einer Umweltbedingung wird erfindungsgemäß durch Beeinflussung der Induktivität der Spule und/oder der Kapazität des Kondensators bewirkt.The change of at least one environmental condition to be detected is effected according to the invention by influencing the inductance of the coil and / or the capacitance of the capacitor.
Eine vorteilhafte Möglichkeit zur Beeinflussung der Induktivität ist in diesem Zusammenhang eine Änderung der relativen Permeabilität und/oder beim Kondensator eine Änderung der relativen Dielektrizitätszahl .An advantageous possibility for influencing the inductance in this context is a change in the relative permeability and / or the capacitor a change in the relative permittivity.
Die Figuren 1 und 2 zeigen beispielhaft und schematisch eine temperaturabhängig dauerhafte Änderung der Resonanzfrequenz eines RFID-Schwingkreises infolge dauerhafter Veränderung des im Schwingkreiskondensator enthaltenen Dielektrikums.Figures 1 and 2 show by way of example and schematically a temperature-dependent permanent change in the resonant frequency of an RFID resonant circuit due to permanent change in the dielectric contained in the resonant circuit capacitor.
In Figur 1 ist der Aufbau eines unverstimmten Schwingkreises SKl gezeigt, wobei der Schwingkreis eine Antennenspule L und einen dazu parallelgeschalteten Kondensator Cl mit einem porösen Dielektrikum D aufweist, das über eine flüssigkeitsleere Kapillare mit einem Flüssigkeitsbehälter verbunden ist, der eine Flüssigkeit Fl mit einer Temperatur unterhalb einer bestimmten Grenztemperatur enthält.FIG. 1 shows the structure of an unsocial resonant circuit SK1, the resonant circuit comprising an antenna coil L and a capacitor C1 connected in parallel with a porous dielectric D, which is connected via a liquid-empty capillary to a liquid container containing a liquid F1 having a temperature below contains a certain limit temperature.
In Figur 2 ist hingegen der Aufbau eines verstimmten Schwingkreises SK2 gezeigt, wobei der Schwingkreis wiederum eine Antennenspule L aber einen dazu parallelgeschalteten Kondensator C2 mit einem flüssigkeitsdurchtränkten porösen Dielektrikum DF aufweist, das über eine flüssigkeitsgefüllte Kapillare mit einem Flüssigkeitsbehälter verbunden ist, der eine Flüssigkeit F2 mit einer Temperatur über einer bestimmten Grenztemperatur enthält.In contrast, FIG. 2 shows the structure of a detuned oscillating circuit SK2, wherein the resonant circuit again has an antenna coil L but a capacitor C2 connected in parallel with a liquid-permeated porous dielectric DF which is connected to a liquid container via a liquid-filled capillary contains a liquid F2 having a temperature above a certain limit temperature.
Hier wird der physikalische Effekt der Ausdehnung von Flüssigkeiten, z.B. Ethanol, bei zunehmender Temperatur ausgenutzt, um kapazitätsbestimmende Merkmale des Kondensators zu verändern.Here, the physical effect of the expansion of liquids, e.g. Ethanol, exploited at increasing temperature to change capacitance-determining characteristics of the capacitor.
Eine bestimmte gewünschte Grenztemperatur ist bspw. durch die Länge der Kapillare K wählbar.A certain desired temperature limit is, for example, by the length of the capillary K selectable.
Das Dielektrikum bleibt auch bei einem anschließenden Rückgang der Temperatur von der Flüssigkeit durchsetzt. Dies hat zur Folge, dass der RFID-Tag nicht mehr ausgelesen werden kann, da eine Energieeinkopplung durch Anregung des Schwingkreises bei seiner ursprünglichen Resonanzfrequenz fRes nicht mehr möglich ist. Das Ausbleiben der Antwort beim Auslesen eines solchen RFID-Tags zeigt an, dass eine Überschreitung der definierten Temperatur, z.B. eine Unterbrechung der Kühlkette oder ein Überlastzustand eines Motors, stattgefunden hat.The dielectric also remains trapped by the liquid at a subsequent decrease in temperature. This has the consequence that the RFID tag can no longer be read, since an energy input by excitation of the resonant circuit at its original resonant frequency fRes is no longer possible. The absence of the response when reading such an RFID tag indicates that exceeding the defined temperature, e.g. an interruption of the cold chain or an overload condition of an engine has taken place.
Die Flüssigkeit kann dabei nur die relative Dielektrizitätskonstante zwischen den Kondensatorplatten verändern oder aber praktisch einen Kurzschluss der Kondensatorplatten bewirken.The liquid can only change the relative dielectric constant between the capacitor plates or virtually cause a short circuit of the capacitor plates.
Alternativ zur physikalischen Beeinflussung des Schwingkreises durch eine in der Kapillare angestiegene Flüssigkeit könnten auch weitere Effekte wie z.B. die Oxidation eines die Resonanzfrequenz beeinflussenden Materials mit Luftsauerstoff genutzt werden, um beispielsweise eine Unterbrechung der Aufbewahrung unter Schutzgasatmosphäre nachzuweisen . Alternatively to the physical influence of the oscillating circuit by a liquid which has risen in the capillary, further effects such as e.g. the oxidation of a resonance frequency influencing material used with atmospheric oxygen, for example, to detect an interruption of storage under a protective gas atmosphere.

Claims

Patentansprüche claims
1. Vorrichtung zur Überwachung von Umweltbedingungen in Form eines passiven RFID-Tags, bei dem ein Empfangsschwingkreis (SKl, SK 2) zur Erzeugung einer Betriebsspannung vorhanden ist, der durch Überschreitung von Grenzen bestimmter Umweltbedingungen dauerhaft verstimmbar oder deaktivierbar ist, so dass auf eine Hochfrequenzanregung hin kein Antwortsignal mehr erzeugbar ist.1. A device for monitoring environmental conditions in the form of a passive RFID tag, in which a receiving resonant circuit (SKl, SK 2) for generating an operating voltage is present, which is permanently tuned or deactivated by exceeding limits of certain environmental conditions, so that a high-frequency excitation out no answer signal is generated anymore.
2. Vorrichtung nach Anspruch 1, bei der die zu detektierende Änderung mindestens einer Umweltbedingung durch Beeinflussung der Induktivität einer Spule (L) und/oder der Kapazität eines Kondensators (Cl, C2) bewirkbar ist.2. Apparatus according to claim 1, wherein the change to be detected at least one environmental condition by influencing the inductance of a coil (L) and / or the capacitance of a capacitor (Cl, C2) is effected.
3. Vorrichtung nach Anspruch 2, bei der die Beeinflussung der Induktivität durch eine Änderung der relativen Permeabilität und/oder beim Kondensator durch eine Änderung der relativen Dielektrizitätszahl bewirkbar ist.3. A device according to claim 2, wherein the influencing of the inductance by a change in the relative permeability and / or the capacitor by a change in the relative permittivity is effected.
4. Vorrichtung nach Anspruch 3, bei der der Schwingkreis (SK2) eine Antennenspule (L) und einen Kondensator (C2) mit einem porösen Dielektrikum (DF) aufweist, das über eine Kapillare mit einem Flüssigkeitsbehälter derart verbunden ist, dass das poröse Dielektrikum bei Überschreitung einer bestimmten Grenztemperatur von der im Flüssigkeitsbehälter befindlichen Flüssigkeit infolge temperaturbedingter Ausdehnung durchtränkt wird.4. Apparatus according to claim 3, wherein the resonant circuit (SK2) comprises an antenna coil (L) and a capacitor (C2) with a porous dielectric (DF), which is connected via a capillary with a liquid container such that the porous dielectric at Exceeding a certain limit temperature is saturated by the liquid in the liquid container due to temperature-induced expansion.
5. Vorrichtung nach Anspruch 1, bei der der Empfangsschwingkreis (SKl, SK 2) zur Erzeugung einer Betriebsspannung derart verstimmbar oder deaktivierbar ist, dass ein die Resonanzfrequenz beeinflussendes Material durch Oxidation mit Luftsauerstoff veränderbar ist. 5. Apparatus according to claim 1, wherein the receiving resonant circuit (SKL, SK 2) for generating an operating voltage is tunable or deactivatable such that a resonance frequency influencing material is changed by oxidation with atmospheric oxygen.
6. Verwendung der VorichtungVorrichtung nach Anspruch 4, zum nachträglichen Nachweis einer Unterbrechung einer Kühlkette oder eines Überlastzustandes eines Motors .6. Use of the VorichtungVorrichtung according to claim 4, for the subsequent detection of an interruption of a cold chain or an overload condition of an engine.
7. Verwendung der VorichtungVorrichtung nach Anspruch 5, zum nachträglichen Nachweis einer Unterbrechung der Aufbewahrung unter Schutzgasatmosphäre. 7. Use of VorichtungVorrichtung according to claim 5, for the subsequent detection of an interruption of storage under a protective gas atmosphere.
PCT/EP2006/050613 2005-04-14 2006-02-02 Device for monitoring environmental conditions and use of said device WO2006108725A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510017299 DE102005017299A1 (en) 2005-04-14 2005-04-14 Device for monitoring environmental conditions and their use
DE102005017299.7 2005-04-14

Publications (1)

Publication Number Publication Date
WO2006108725A1 true WO2006108725A1 (en) 2006-10-19

Family

ID=36089216

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/050613 WO2006108725A1 (en) 2005-04-14 2006-02-02 Device for monitoring environmental conditions and use of said device

Country Status (2)

Country Link
DE (1) DE102005017299A1 (en)
WO (1) WO2006108725A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009000919A2 (en) * 2007-06-27 2008-12-31 Technische Universität Carolo-Wilhelmina Zu Braunschweig Device for monitoring the condition of structures
EP2028872A1 (en) * 2007-08-24 2009-02-25 Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO Method for remote measuring of a physical variable

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006040723A1 (en) * 2006-08-31 2008-04-30 Siemens Ag RFID transponder with sensor elements
DE202009018612U1 (en) * 2009-01-19 2012-08-17 Schreiner Group Gmbh & Co. Kg Transponder device for storing a date

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003044521A1 (en) * 2001-11-19 2003-05-30 Valtion Teknillinen Tutkimuskeskus Rfid spoilage sensor for packaged food and drugs
US20040061655A1 (en) * 2002-08-07 2004-04-01 Forster Ian J. Environmentally sensitive multi-frequency antenna
WO2005008578A2 (en) * 2003-07-07 2005-01-27 Avery Dennison Corporation Rfid device with changeable characteristics

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003044521A1 (en) * 2001-11-19 2003-05-30 Valtion Teknillinen Tutkimuskeskus Rfid spoilage sensor for packaged food and drugs
US20040061655A1 (en) * 2002-08-07 2004-04-01 Forster Ian J. Environmentally sensitive multi-frequency antenna
WO2005008578A2 (en) * 2003-07-07 2005-01-27 Avery Dennison Corporation Rfid device with changeable characteristics

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009000919A2 (en) * 2007-06-27 2008-12-31 Technische Universität Carolo-Wilhelmina Zu Braunschweig Device for monitoring the condition of structures
DE102007030195A1 (en) 2007-06-27 2009-01-02 Technische Universität Carolo-Wilhelmina Zu Braunschweig Device for condition monitoring of components and structures
WO2009000919A3 (en) * 2007-06-27 2009-03-05 Univ Braunschweig Tech Carolo Wilhelmina Device for monitoring the condition of structures
EP2028872A1 (en) * 2007-08-24 2009-02-25 Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO Method for remote measuring of a physical variable
WO2009028936A1 (en) * 2007-08-24 2009-03-05 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Method for remote measuring of a physical variable
US8493184B2 (en) 2007-08-24 2013-07-23 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Method for remote measuring of a physical variable

Also Published As

Publication number Publication date
DE102005017299A1 (en) 2006-10-19

Similar Documents

Publication Publication Date Title
DE102004062132A1 (en) Backscatter transponder
EP3502604B1 (en) Use of a product sensor, use of a set of product sensors, drying vessel and method for operating a product sensor
EP2597440B1 (en) Passive temperature sensor
EP2802283B1 (en) Storage and/or transport container for medical instruments and method for detecting and transferring data of medical instruments
EP3191733A1 (en) Brake shoe having a wear indicator
DE102017100266A1 (en) Temperature limit sensors
DE202016102133U1 (en) Slide bearing, plastic sliding element, system and use for wear detection
DE112009004421T5 (en) RFID scanning system without external power supply to query the structural health
WO2006108725A1 (en) Device for monitoring environmental conditions and use of said device
DE102009043267A1 (en) Screwing unit for screwing wheel of vehicle i.e. lorry, has sensor component arranged relative to nut and arranged in front side of nut, where variable characteristics depends on pre-stress force that is produced by nut
DE4006885C2 (en) Evaluation method for a sensor for measuring the temperature of a moving, preferably rotating body, in particular a rotating brake disc
DE102009005100A1 (en) Transponder device for storing data, has antenna arrangement for decoupling signal from device, where level of signal is based on condition of sensor element, and condition is varied based on physical or chemical reaction on material
WO2007071354A1 (en) Apparatus and method for checking and wirelessly transmitting the state of a signal generator
EP1969533A1 (en) Document comprising a data memory, device and method for reading an rfid tag, and computer program product
DE102006052708B3 (en) Arrangement and method for data acquisition
EP1607723B1 (en) Electronic component with a measuring sensor and a wireless interface
DE102008017622A1 (en) Antenna arrangement with at least two decoupled antenna coils; RF component for non-contact transmission of energy and data; electronic device with RF component
DE602004003633T2 (en) RFID system with sensor and method for sending additional signals
DE102005043773A1 (en) Bearings, in particular printing press bearings
DE10256099A1 (en) Transmitting and receiving device for contactless data transmission
EP3025134B1 (en) System for measuring an axial force of a threaded connection
DE102007058278A1 (en) Seat e.g. child seat, belt system for use in motor vehicle, has reader arranged on transponder, and recognizing pre-determined influence of transponder or presence and absence of transponder that is coupled to component of system
DE60125088T2 (en) Reading device with means for determining the number of electromagnetic transponders in the field of the reading device
DE102007034173A1 (en) Energy absorption of contactless data carriers
DE102006001504A1 (en) Identification data carrier, reading device, identification system and method for producing an identification data carrier

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Country of ref document: DE

NENP Non-entry into the national phase

Ref country code: RU

WWW Wipo information: withdrawn in national office

Country of ref document: RU

122 Ep: pct application non-entry in european phase

Ref document number: 06707974

Country of ref document: EP

Kind code of ref document: A1

WWW Wipo information: withdrawn in national office

Ref document number: 6707974

Country of ref document: EP