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Auto-ID Labs & Field Intelligence Lab Sanjay Sarma
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Slide 2
Acknowledgments
Dr. Christian Floerkemeier
Dr. Stephen Ho
Dr. Ajay Deshpande
Dr. Bae-Ian Wu
Ed Schuster
Isaac Ehrenberg
Stephen Samouhos
Rahul Bhattacharyya
Sumeet Kumar
Kat Donnelly
Ivan Sergeev
Alberto Perez
Austin Oehlerking
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Slide 3
Why RFID?
The US supply chain has goods worth $4.3 trillion in inventory
The counterfeit industry worldwide is at least $100 billion
Medical errors kill 50,000-100,000 patients every year in the US
Impact:
Over 1 billion EPC tags have been read
Over 1000 companies have signed up
Over $500M has been invested by venture capitals (and lost )
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RFID Simulation Engine
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Slide 5
Simulating RFID
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Slide 6
Path loss and fading makes tags fickle
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Meta Materials
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Slide 8
Cloaking Principle
J. B. Pendry, D. Schurig,2 D. R. Smith2 Science 23 June 2006: Vol. 312. no. 5781, pp. 1780 - 1782
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Slide 9
Cloaking Relies on Meta-Materials
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Slide 10
Enhancing Tag Performance on Metal using Meta-Materials
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Slide 11
Enhancing Tag Performance on Metal using Meta-Materials
Placing an UHF tag on coke requires ideally an 8 cm spacer
8 cm
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Slide 12
Enhancing Tag Performance on Metal using Meta-Materials
Our goal is to design a meta-material to “shrink” 8 cm to 1 mm
… and then develop a low-cost meta-material fabrication technique.
Goal: Develop a low-cost, high performance RFID tag in a convenient form factor
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Slide 13
Enhancing Tag Performance on Metal using Meta-Materials
Current status: – An early prototype validates our hypothesis – Next steps will focus on
developing metamaterial structures that are thinner fabrication of the metamaterial
Work is done on collaboration with MIT RLE
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RFID antenna based sensors
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Slide 15
Beyond Identification: Low cost RFID sensors
∆
Beam in Loaded State
Load Beam in Unloaded State
Measuring displacements represents a common method to assess structural health
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Slide 16
Beyond Identification: Low cost RFID sensors
∆
Beam in Loaded State
Load Beam in Unloaded State
Conventional Approaches to measure displacement:
• Wired sensors
• Battery-powered wireless sensors
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Slide 17
Beyond Identification: Low cost RFID sensors
∆
Beam in Loaded State
Load Beam in Unloaded State
Use the tag antenna in conventional RFID tags as the displacement sensors:
• Infinite life-time
• Low cost
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Slide 18
∆
Metal Plate Load
• Load applied – metal plate is close to tag • Tag responds with a weak backscatter signal
Tag Antenna Based Sensing Principle
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Slide 19
Tag Antenna Based Sensing: Not Limited to Displacement Sensing
RFID Tag – Antenna Based Sensing
Temperature Monitoring
Touch
Light
Map any physical phenomenon RFID Tag Power Properties
Use conventional, low cost RFID tag ICs with custom tag antennas as low
cost sensors
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Warehousing
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Slide 21
Fragmented Warehousing
Location-relaxed Storage allows 100% space utilization
Strict Organization has limitations on usage
?
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Slide 22
Beyond Identification: RFID
Missing Book: "Capital" by Marx, Engels
Misplaced Book: "The General Theory of Employment,.." by
Keynes
Loc
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Slide 23
NRTLS – Non Real-Time Location Systems
Vision: Zero Configuration Location System using Mobile Robot Mounted RFID Readers
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Field Intelligence Labs
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Slide 25
Sensor Infrastructure
Sensors
Sampling Theory Sensing Devices
Communication Motion Modules
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Slide 26
Applications
Electricity Micro‐metering
Water &
Agriculture Sensing
Automobile Logging
City Negawatt Mining
Behavioral Sensing
Home Energy Auditing
Infrastructure Sensing
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Slide 27
Early results: Electricity Micrometering
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Slide 28
Early Results: Home Energy Audits
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Slide 29
Early Results: Automobile Logging
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Slide 30
Early Results: Water
4
3
2
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Thank you