Flexible tag gas sensing system for food logistics applications
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Flexible Tag Gas Sensing System for Food Logistics Applications. University Barcelona. M. Cicioni , A. Scorzoni, P. Placidi, F. Alimenti DIEI Università degli Studi di Perugia, Via Duranti 93, 06125 Perugia, Italy S. Zampolli, G.C. Cardinali, I. Elmi

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Flexible Tag Gas Sensing System for Food Logistics Applications

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Flexible tag gas sensing system for food logistics applications

Flexible Tag Gas Sensing Systemfor Food Logistics Applications

University Barcelona

M. Cicioni, A. Scorzoni, P. Placidi, F. Alimenti

DIEI Università degli Studi di Perugia, Via Duranti 93, 06125 Perugia, Italy

S. Zampolli, G.C. Cardinali, I. Elmi

CNR – IMM Sezione di Bologna, Via P. Gobetti 101, 40129 Bologna, Italy


Scenario

Ami Network

Reader

Flexible Tag

Microlab

(with gas sensing capabilities)

AmI node

Flexible Tag

Microlab

Flexible Tag

Microlab

Scenario

  • A flexible tag gas sensing system with Radio Frequency IDentification (RFID) communication capabilities for food logistics is being proposed

  • The final device will be a flexible label hosting sensing capabilities and a RFID interface for wireless data exchange within an Ambient Intelligence (AmI) infrastructure

  • This visionary application requires the development and optimization of several Micro System Technologies


System architecture

System architecture

  • Custom RFID circuitry with discrete components (ISO-15693 Vicinity Card):

    • antenna (1)

    • analog front-end (2)

    • digital circuitry (sensor control and signal acquisition) (3)

    • commercial RH & temperature sensor and light sensor (4)

    • thin film flexible battery and switching power supply (5)

Ultra-low power (ULP) Metal OXide (MOX) sensor

4

+

3

1

2

5


Rfid capabilities

Digital blocks

Demodulator

Control Unit

Analog

Front-End

Decoding of

incoming message

Preparation of

outgoing message

Antenna

Modulator

implemented on CPLD

implemented on µC

implemented on both CPLD and µC

RFID capabilities

Reader  Tag

  • 100% Amplitude Shift Keying (ASK) pulse position coding

  • Analog front-end rectifies the incoming signal

  • CPLD hw demodulates the signal

Tag  Reader

  • Antenna loading to generate subcarriers: Frequency Shift Keying (FSK) modulation

  • CPLD and mC manage the transmission


Conclusions

Conclusions

  • Prototypes of RFID antennas on flexible substrate and active (battery powered) RFID circuits were realized and tested

  • ULP MOX sensor hotplates have been designed through FEM simulations, and physically realized

  • RFID tags featuring MOX sensors will be available by the end of 2006


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