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Ischia, 21-23 giugno 2006Riunione Annuale GE 2006
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
University Barcelona
Flexible Tag Gas Sensing System
for Food Logistics Applications
Ischia, 21-23 giugno 2006Riunione Annuale GE 2006
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
Ami Network
Reader(with gas sensing
capabilities)AmI node
Flexible TagMicrolab
Flexible TagMicrolab
Flexible TagMicrolab
Ischia, 21-23 giugno 2006Riunione Annuale GE 2006
System architecture
12
3
4
5
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
Ischia, 21-23 giugno 2006Riunione Annuale GE 2006
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 C manage the transmission
implemented on CPLD
implemented on µC
implemented on both CPLD and µC
Antenna
Demodulator
Decoding of incoming message
Preparation of outgoing message
Analog
Front-End
Modulator
Control Unit
Digital blocks
Ischia, 21-23 giugno 2006Riunione Annuale GE 2006
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