07 11 12

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07 11 12

  1. 1. RFID Information Grid and Wearable Computing Solution to the Problem of Wayfinding for the Blind User in a Campus Environment
  2. 2. Reference <ul><li>Scooter Willis and Sumi Helal </li></ul><ul><li>Computer & Information Science & Engineering Department </li></ul><ul><li>University of Florida, Gainesville, FL 32611, USA </li></ul>
  3. 3. Outline <ul><li>Introduction </li></ul><ul><li>Requirements and Design </li></ul><ul><li>Proximity Sensing </li></ul><ul><li>Related Work </li></ul><ul><li>Conclusion and future work </li></ul>
  4. 4. Introduction <ul><li>Blind students </li></ul><ul><li>Number of blind persons in this country: 1.1 million </li></ul><ul><li>Number of blind school age children: 57,425 </li></ul><ul><li>Estimated annual cost of blindness to the federal government: $4 billion </li></ul><ul><li>Lifetime cost of support and unpaid taxes for one blind person: $916,000 </li></ul>
  5. 5. Requirements and Design <ul><li>Passive, low-cost, High Frequency RFID tags </li></ul><ul><li>Siemens S65 cell phone under $200 inclusive of a service contract </li></ul><ul><li>Bluetooth RFID combination reader is $170 </li></ul><ul><li>The unit cost of the NAVCOM belt is under $200 </li></ul>
  6. 6. Requirements and Design <ul><li>Indoor Navigation Infrastructure </li></ul><ul><li>Outdoor Navigation Infrastructure </li></ul><ul><li>Room and Path Mapping </li></ul><ul><li>RFID Technology Options </li></ul><ul><li>Mobile Software Platform </li></ul><ul><li>RFID Reader </li></ul><ul><li>Data Encoding on RFID Tags </li></ul><ul><li>NAVCOM Belt </li></ul>
  7. 7. RFID Reader
  8. 8. Data Encoding on RFID Tags <ul><li><tag> </li></ul><ul><li><location> </li></ul><ul><li><latitude>1234.5678</latitude> </li></ul><ul><li><longitude>5678.1234</longitude> </li></ul><ul><li></location> </li></ul><ul><li><object type=&quot;chair&quot;> </li></ul><ul><li><position type=&quot;delta&quot;>10 10</position> </li></ul><ul><li></object> </li></ul><ul><li><object type=&quot;table&quot;> </li></ul><ul><li><position type=&quot;delta&quot;>10 -10</position> </li></ul><ul><li></object> </li></ul><ul><li></tag> </li></ul>
  9. 9. XML v.s CML v.s Huffman encoding efficiency
  10. 10. NAVCOM Belt
  11. 11. Proximity Sensing <ul><li>Determine user orientation so navigation to the object can occur </li></ul>
  12. 12. Proximity Sensing
  13. 13. Related Work <ul><li>RF transmitters </li></ul><ul><li>The High-Density active RFID Tag Space </li></ul><ul><li>GPS/Digital Compass </li></ul><ul><li>Outdoor IR beacons </li></ul><ul><li>The Locust IR system </li></ul><ul><li>DGPS </li></ul>
  14. 14. Conclusion and future work <ul><li>The mature technology </li></ul><ul><li>Economically feasible </li></ul><ul><li>Text-to-Speech and voice recognition </li></ul><ul><li>The core application responsible for assisting with wayfinding </li></ul><ul><li>An automated robotic platform will be designed </li></ul>
  15. 15. Thank you

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