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Proceedings Paper

RFID reader with gas sensing capability for monitoring fruit along the logistic chain: array development and signal processing
Author(s): Eduard Llobet; Alexander Vergara; José Luis Ramírez; Stefano Zampolli; Thomas Becker; Luis Fonseca
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Paper Abstract

The reliable and low-cost quantitative detection of ethylene for food/fruit applications remains an unsolved problem. Existing commercial systems are able to quantify ethylene (at sub ppm levels) but either they are off-line: require periodic sample collection and use of reagents or high-cost. We will report on the development of an RFID reader with onboard micro-machined metal oxide gas sensors aimed at monitoring climacteric fruit during transport and vending. The developed platform integrates a commercial off the shelf inductive coupling RF transceiver in the 13.56MHz band, fully compliant with the ISO15693 standard, micro-hotplate gas sensors, driving and readout electronics. If the sensors are operated at a fixed temperature, the reader could work as an alarm level monitor able to assess the conservation stage of apples. On the other hand, when the sensors are operated under an optimised temperature-modulation mode, accurate calibration models for the species that are relevant to assess the conservation stage of apples (i.e., ethylene, acetaldehyde and ethanol) can be built. Finally, different feature extraction techniques such as the FFT and the Energy Vector will be used in combination with pattern recognition tools like PLS and PLS-DA to show that our system is able to identify and quantify the species that are relevant for the application considered.

Paper Details

Date Published: 17 May 2007
PDF: 10 pages
Proc. SPIE 6589, Smart Sensors, Actuators, and MEMS III, 65890Q (17 May 2007); doi: 10.1117/12.723852
Show Author Affiliations
Eduard Llobet, Univ. Rovira i Virgili (Spain)
Alexander Vergara, Univ. Rovira i Virgili (Spain)
José Luis Ramírez, Univ. Rovira i Virgili (Spain)
Stefano Zampolli, CNR-IMM (Italy)
Thomas Becker, EADS Deutschland GmbH (Germany)
Luis Fonseca, CNM-CSIC (Spain)

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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