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Intelligent plaster for accurate body temperature monitoring and investigations regarding EMI using near-field magnetic scan

Intelligentes Pflaster für die genaue Überwachung der Körpertemperatur und Untersuchungen bezüglich elektromagnetischer Störungen unter Verwendung eines Nahfeld-Magnet-Scanners

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Abstract

A wireless self-sufficient human body temperature monitoring system was designed using a 130 nm CMOS standard process. This miniaturized sensor grain enables significant cost advantages and impresses with its high level of integration. The RFID communication protocol ensures compatibility with state-of-the-art smart phones and tablets, thus facilitating point-of-care as well as end-user utilization. The biocompatible plaster enables cyclic measurements and also storage of the obtained data. In the range of 35 °C to 42 °C a \(\pm3\sigma\) accuracy of ±0.4 °C can be achieved. The system is powered by a lithium based micro battery, which can be recharged wirelessly by any state-of-the-art near field communication device. Measurement data and monitoring history can be displayed via an Android™ software application on a commercial NFC compatible smartphone. The configuration and calibration data as well as the measurement results are stored in the integrated EEPROM. The main advantage of this system appliance is, that it can be easily used within the scope of medical attendance as well as home health care. For the save usage in hospitals additional investigations regarding Electromagnetic Interference using Near-Field Magnetic Scan were performed.

Zusammenfassung

Ein drahtloses Temperaturüberwachungssystem wurde in einem 130 nm Standard-CMOS-Prozess realisiert. Dieser miniaturisierte Sensorchip punktet durch erhebliche Kostenvorteile und beeindruckt durch seinen hohen Integrationsgrad. Das verwendete RFID-Kommunikationsprotokoll garantiert die Kompatibilität mit modernsten Smartphones und Tablets, was die Vor-Ort-Diagnose als auch die Verwendung durch den Privatanwender erleichtert. Das biokompatible Pflaster ermöglicht zyklische Messungen sowie die Speicherung der gewonnenen Daten. Im Bereich von 35 °C bis 42 °C kann eine ±3-Sigma-Genauigkeit von ±0.4 °C erreicht werden. Das System wird durch einen Mikro-Lithium-Akku versorgt, welcher kabellos durch jedes kommerziell erhältliche Nahfeldkommunikationsgerät aufgeladen werden kann. Die Messdaten und der Temperaturverlauf können mit einer Android™-Software-Applikation abgerufen und dargestellt werden. Die Konfigurations- und Kalibrierdaten werden im integrierten EEPROM gespeichert. Der Vorteil dieser Applikation ist die einfache Handhabung im Rahmen der ärztlichen Betreuung als auch in der häuslichen Krankenpflege. Zusätzlich wurden – für die bedenkenlose Verwendung in Krankenhäusern – Untersuchungen bezüglich elektromagnetischer Störausstrahlungen durchgeführt.

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Acknowledgements

The authors would like to thank Dr. Kurt Lamedschwandner and Ing. Hans Preineder from Seibersdorf Labor GmbH for their valuable inputs regarding the near and far field considerations.

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Authors and Affiliations

  1. Development Center Graz, Infineon Technologies Austria AG, Babenberger Straße 10, 8020, Graz, Austria

    Carolin Kollegger & Gerald Holweg

  2. Institute of Electronics, Graz University of Technology, Inffeldgasse 12, 8010, Graz, Austria

    Christoph Steffan & Bernd Deutschmann

  3. Institute of Microwave and Photonic Engineering, Graz University of Technology, Inffeldgasse 12, 8010, Graz, Austria

    Philipp Greiner

  4. Danube Integrated Circuit Engineering, Infineon Technologies Austria AG, Freistädter Straße 400, 4040, Linz, Austria

    Martin Wiessflecker

Authors
  1. Carolin Kollegger
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  2. Christoph Steffan
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  3. Philipp Greiner
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  4. Martin Wiessflecker
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  5. Gerald Holweg
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  6. Bernd Deutschmann
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Correspondence to Carolin Kollegger.

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Kollegger, C., Steffan, C., Greiner, P. et al. Intelligent plaster for accurate body temperature monitoring and investigations regarding EMI using near-field magnetic scan. Elektrotech. Inftech. 133, 25–31 (2016). https://doi.org/10.1007/s00502-015-0381-7

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