RFID Automation

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Transcript of RFID Automation

  • 1.
    • ELG 4135
    • Electronics Project
    • Professor: Riadh Habash
    • TA: Mohamad Eid
    • TA: Peng He
  • 3. Manufacturer Information serial#, pressure, model Content, etc Application Software Asset Management Information Inventory #, receipt, date, current location, etc Inspection Information repair, date and location of last inspection and retest, Safety data, etc Other data can also be programmed on request Cylinder Filling Information Content, date of last fill, place of last fill, fill counter, etc Report Generation Comprehensive reporting, Current status, historical logs, etc The Problem
  • 4. Constructing The Loop Distributor Customer Supplier
  • 5. Existing Technologies
    • Component cables or Electrical wires
    • WiFi
    • Infrared Signals
    • Bluetooth
    • Home RF
    • RFID
  • 6. WiFi 802.11
    • Wi-Fi setup consists of several Access Points (APs) and several clients. Each AP broadcasts its Service Set Identifier (SSID) through packets called beacons
    • High power consumption
    • Needs encryption for security
    • Interruption can occur from 2.4 GHz mobile phones and microwave ovens
    • Adapters must be installed on each client
    • High data rate
    • Low interference
    • Products widely available in the market
    Disadvantages Advantages
  • 7. Bluetooth
    • Radio frequency standard
    • Max distance 32 feet
    • Not the cheapest
    • Low interference because of the low power consumption
    • Automatic recognition
    • Each transmission consumes 1 milliwatt of power
    Disadvantages Advantages
  • 8. Infrared Signals
    • Light waves of a lower frequency than human eyes can receive and interpret
    • "line of sight" technology
    • "one to one" technology
    • Speed of data rate transmission is lower than typical wired transmission
    • Interference between devices is uncommon
    Disadvantages Advantages
  • 9. Home RF
    • Radio frequency standard
    • Blocked by common materials: people, walls
    • Short range
    • Speed of data rate transmission is lower than typical wired transmission
    • Enhances mobility
    • No transmitter interaction/interference
    • Low Cost
    Disadvantages Advantages
  • 10. Why is RFID better than using bar codes?
    • Bar codes are line-of-sight technology, which means people usually have to orient the bar code towards a scanner for it to be read. Radio frequency identification, by contrast, doesnt require line of sight .
    • RFID tags can be read as long as they are within range of a reader.
    • Bar codes have other shortcomings as well. If a label is ripped, soiled or falls off, there is no way to scan the item.
    • Standard bar codes identify only the manufacturer and product, not the unique item. The bar code on one cylinder is the same as every other, making it impossible to identify which one might pass the inspection.
  • 11. RFID An Idea Whose Time Has Come
    • Radio Frequency Identification (RFID) is a technology with several aspects that correspond to different applications.
    • The common element of all RFID applications is the use of radio signals to sense the presence of a tagged object and, in most instances, to retrieve data stored on the object.
  • 12. What is RFID? (Continued)
    • From the sensing point of view, the many RFID applications are quite diverse, including
      • Radar
      • Access control systems and smart cards
      • Automatic toll collection
      • Asset tracking (e.g., railroad cars)
      • Animal tagging, including implants
      • Hazardous substance tracking
      • Inventory and supply chain tracking
  • 13. RFID Components
    • RFID transponder or an RFID tag :
    • There are several methods of identification, but the most common is to store a serial number that identifies a person or object, and perhaps other information, on a microchip
    • Tag is attached to an antenna The antenna enables the chip to transmit the identification information to a reader.
    • The reader converts the radio waves reflected back from the RFID tag into digital information that can then be passed on to computers that can make use of it.
    • Friendly software
  • 14. Components of an RFID system Figure (1)
  • 15. Example RFID Tags Labels with RFID tags embedded 2.5 mm coil-on-chip RFID tag for close proximity applications (Maxell)
  • 16. Gas Cylinders
  • 17. SIGAS SOLUTION Empty Full
  • 18. RFID High level System Design
  • 19. 125 KHz Low Pass Filter
  • 20. 3 rd Order Butterworth LPF
  • 21. Frequency Response of Butterworth Filter
    • All frequencies above 912 MHz are filtered out.
    • Phase shift at 912 MHz is about -100 degrees.
  • 22. Input and Output Signals of 912 MHz LPF
  • 23. Half Bridge Power Amplifier
    • Voltage Gain = 0.816
    • Current Gain = 108
    • Power Gain = 88
    • Cross over distortion
    • avoided by 2 diodes
  • 24. Frequency Response of Power Amplifier
    • Output voltage is the same for all frequencies.
    • Output current does not depend on frequency.
    • Therefore Power Gain is constant.
  • 25. Transmitted Power
    • Input voltage = 1.549 V
    • Input current = 20.418 mA
    • Input Power = 31.6 mW
    • LPF output voltage = 0.49 V
    • LPF output current = 0.074 mA
    • LPF output power = 36.3 W
    • Amplifier output voltage = 0.4 V
    • Amplifier output current = 8 mA
    • Amplifier output power = 3.2 mW
  • 26.