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Proceedings Paper

Ultra-low-power electronics and devices for a multisensing RFID tag
Author(s): Stefano Zampolli; Ivan Elmi; Gian Carlo Cardinali; Andrea Scorzoni; Michele Cicioni; Santiago Marco; Francisco Palacio; Jose M. Gómez-Cama; Ilker Sayhan; Thomas Becker
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Paper Abstract

A multisensing flexible Tag microlab (FTM) with RFID communication capabilities and integrated physical and chemical sensors for logistic datalogging applications is being developed. For this very specific scenario, several constraints must be considered: power consumption must be limited for long-term operation, reliable ISO compliant RFID communication must be implemented, and special encapsulation issues must be faced for reliable sensor integration. In this work, the developments on application specific electronic interfaces and on ultra-low-power MOX gas sensors in the framework of the GoodFood FP6 Integrated Project will be reported. The electronics for sensor control and readout as well as for RFID communication are based on an ultra-low-power MSP430 microcontroller from Texas Instruments together with a custom RFID front-end based on analog circuitry and a CPLD digital device, and are designed to guarantee a passive ISO15693 compliant RFID communication in a range up to 6 cm. A thin film battery for sensor operation is included, allowing data acquisition and storage when no reader field is present. This design allows the user to access both the traceability and sensor information even when the on-board battery is exhausted. The physical sensors for light, temperature and humidity are commercially available devices, while for chemical gas sensing innovative MOX sensors are developed, based on ultra-low-power micromachined hotplate arrays specifically designed for flexible Tag integration purposes. A single MOX sensor requires only 8.9 mW for continuous operation, while temperature modulation and discontinuous sensor operation modes are implemented to further reduce the overall power consumption. The development of the custom control and RFID electronics, together with innovative ultra-low-power MOX sensor arrays with flexible circuit encapsulation techniques will be reported in this work.

Paper Details

Date Published: 15 May 2007
PDF: 8 pages
Proc. SPIE 6589, Smart Sensors, Actuators, and MEMS III, 65890P (15 May 2007); doi: 10.1117/12.723940
Show Author Affiliations
Stefano Zampolli, CNR-IMM Bologna (Italy)
Ivan Elmi, CNR-IMM Bologna (Italy)
Gian Carlo Cardinali, CNR-IMM Bologna (Italy)
Andrea Scorzoni, Univ. degli Studi di Perugia (Italy)
Michele Cicioni, Univ. degli Studi di Perugia (Italy)
Santiago Marco, Univ. de Barcelona (Spain)
Francisco Palacio, Univ. de Barcelona (Spain)
Jose M. Gómez-Cama, Univ. de Barcelona (Spain)
Ilker Sayhan, EADS Corp. Research Ctr. (Germany)
Thomas Becker, EADS Corp. Research Ctr. (Germany)

Published in SPIE Proceedings Vol. 6589:
Smart Sensors, Actuators, and MEMS III
Thomas Becker; Carles Cané; N. Scott Barker, Editor(s)

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