1. Enabling field intelligence with RFID tag antenna-based sensors Dr. Rahul Bhattacharyya Prof. Sanjay Sarma

2. © Auto ID Labs, MIT Slide 2 of 15 The Internet is for Things… Eventually The lab agenda

3. © Auto ID Labs, MIT Slide 3 of 15 Research themes  Interoperability  Extensibility Beyond ID: RFID tags as sensors

4. © Auto ID Labs, MIT Slide 4 of 15 Beyond the ‘ID’ in RFID Why RFID for sensing?  Proven track record of pervasive deployment  Low cost RFID tag manufacturing  Standardized reader-tag communication  Free adoption in RFID-enabled processes Question: How to add sensing functionality at low-cost?

5. © Auto ID Labs, MIT Slide 5 of 15 RFID Reader RFID Tag RFID-based sensing

6. © Auto ID Labs, MIT Slide 6 of 15 2 Examples  Field Moisture Sensor  Surface Crack Detector

7. © Auto ID Labs, MIT Slide 7 of 15 Example 1: Field moisture sensing

8. © Auto ID Labs, MIT Slide 8 of 15 Moisture sensor design Antenna IC Monopole probe Sand

9. © Auto ID Labs, MIT Slide 9 of 15 Moisture sensor results

10. © Auto ID Labs, MIT Slide 10 of 15 Example 2: Surface crack detection 1 in 4 US bridges are structurally deficient (NYT 2009)

11. © Auto ID Labs, MIT Slide 11 of 15 Crack sensor prototype Antenna Tag IC

12. © Auto ID Labs, MIT Slide 12 of 15 Crack sensor results

13. © Auto ID Labs, MIT Slide 13 of 15 Conclusion  Theme of extensibility  Scope of RFID for pervasive sensing

14. © Auto ID Labs, MIT Slide 14 of 15 Relevant Publications  A. Hasan, R. Bhattacharyya and S. Sarma, "A Monopole- Coupled RFID Sensor For Pervasive Soil Moisture Monitoring,” accepted at the IEEE International Symposium on Antennas and Propagation: Special Session on Advances in RFID Sensing, 2013.  P. Kalansuriya, R. Bhattacharyya and S. Sarma, "An antenna- based RFID expansion joint monitor,” accepted at the IEEE International Symposium on Antennas and Propagation: Special Session on Advances in RFID Sensing, 2013.  P. Kalansuriya, R. Bhattacharyya and S. Sarma, "RFID Tag Antenna-Based Sensing for Pervasive Surface Crack Detection", IEEE Sensors Journal, 2013.RFID Tag Antenna-Based Sensing for Pervasive Surface Crack Detection

15. © Auto ID Labs, MIT Slide 15 of 15