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Rfid
This document provides an overview of RFID (radio frequency identification) technology. It describes how RFID works using three main components: a transceiver or reader, an RFID tag, and an antenna. The document outlines the different types of RFID tags and how data is transferred. It also gives examples of current applications for RFID such as supply chain management, access control, and toll collection. Finally, it discusses some advantages and disadvantages of the technology.
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Rfid
- 2. RFID TAG A SEMINORTOPIC ON:
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- 4. Overview What isRFID. How RFID Works. Current Applications. Future Applications. Examples.
- 5. What is RFID? The RFID stands for Radio Frequency Identification. The use of radio frequency tags to identify real objects.
- 6. Identification Assign IDsto objects. Link the ID to additional information about the object. Link the ID to complementary info. Find similar objects.
- 7. Identification Examples BarCodes License Plates Student ID Serial Numbers Car Keys Database Keys
- 8. How Does RFIDWork? There are 3 Components. Transceiver – Tag Reader Transponder – RFID tag Antenna
- 9. RFID Hardware Magnetic /Inductive Coupling Transceiver Tag Reader antenna RFID Tag IC or microprocessor antenna
- 10. RFID Hardware Propagation Coupling Transceiver TagReader antenna RFID Tag IC or microprocessor antenna
- 11. Types of Tags Passive Tags No battery Low cost Active Tags On-board transceiver Battery – must be replaced Longer range High cost
- 12. Types of Tags Read Only factory programmed usually chipless Read / Write on-board memory can save data can change ID higher cost
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- 16. Data Transfer AmplitudeModulation (AM) Frequency Shift Keying (FSK) Phase Shift Keying (PSK)
- 17. Frequency Shift Keying Fc/8/10 0’s are the carrier divided by 8 1’s are the carrier divided by 10 Count clock cycles between changes in frequency Slows the data rate Provides for a simple reader design Fair noise immunity
- 18. Phase Shift Keying One frequency Change the phase on the transition between a 0 to 1 or 1 to 0 Faster data rate than FSK Noise immunity Slightly more difficult to build a reader than FSK
- 19. Multiple Tags? Whathappens when multiple tags are in range of the transceiver? All the tags will be excited at the same time. Makes it very difficult to distinguish between the tags.
- 20. Collision Avoidance Similarto network collision avoidance Probabilistic Tags return at random times Deterministic Reader searches for specific tags
- 21. Frequency Ranges Low– 100-500 kHz short range, low data rate, cost, & power Intermediate – 10-16 MHz medium range and data rate High – 850-950 MHz & 2.4-5.8GHz large range, high cost, high data rate needs line of sight
- 22. Frequency Ranges 8total ranges around the world No standards … yet
- 23. Examples Of Current Applications Livestock Tagging Wild Animal Tracking Electronic Article Surveillance (EAS) Automated Toll Collection Vehicle Anti-Theft
- 24. More Applications Passive/ Secure Entry Airline Baggage Tracking Postal Package Tracking Time and Attendance
- 25. Security RFID usedto grant entry to secure areas Tracks time and movement of people Dynamically change access codes Provide automated entry
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- 28. Package Tracking Picture courtesyTexas Instruments
- 29. Smart Grocery Store Several carts this full in early evening could seriously slow down the checkout process.
- 30. Smart Grocery Store Add an RFID tag to all items in the grocery. As the cart leaves the store, it passes through an RFID transceiver The cart is rung up in seconds.
- 31. RFID Artist conception courtesyMotorola
- 32. Smart Fridge Recognizeswhat’s been put in it Recognizes when things are removed Creates automatic shopping lists Notifies you when things are past their expiration
- 33. RFID’s Advantages Passive wireless Store data on a tag Can be hidden Work in harsh environments
- 34. RFID’s Disadvantages Lackof standards! Short range Cost
- 35. Open Discussion Whatidentification systems exist that could be enhanced with RFID? What new identification systems are only feasible using RFID?
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