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RFIDRADIO FREQUENCY IDENTIFICATION
What is RFID?  Radio-frequency identification (RFID) is an automatic   identification method using radio waves.RFID also b...
There’s a chip
Implanted RFID tags in Humans
Applications   Supply chain automation   Asset tracking   Medical applications   People tracking   Manufacturing   R...
The RFID System1.   Tag.2.   Reader.3.   Reader antenna.4.   Controller.5.   Host and software system.6.   Communication i...
Tag An RFID tag is a device that can store and transmit data to a reader in a contact less manner using radio waves. RFID ...
Passive Tag No on-board power source (for example, a battery) Uses the power emitted from the reader to energize itself ...
 Smaller than an active or semi-active tag. It has a variety  of read ranges starting with less than 1 inch to about 30  ...
Tag An RFID tag is a device that can store and transmit data to a   reader in a contactless manner using radio waves. RFID...
Active Tag   Has on-board power source (for example, a battery; other    sources of power, such as solar, are also possib...
 A tag always communicates first, followed by the reader. Can broadcast its data to its surroundings even in the  absenc...
Tag An RFID tag is a device that can store and transmit data to a   reader in a contactless manner using radio waves. RFID...
Semi-Active (Semi-Passive) Tags     Have an on-board power source (for example, a battery)     Uses the readers emitted ...
Another way to Classify Tags   Read-only (RO)   Write once, read many (WORM)   Read-write (RW)
The RFID System 1.   Tag. 2.   Reader. 3.   Reader antenna. 4.   Controller. 5.   Host and software system. 6.   Communica...
Reader???? An RFID reader can read from and write data to compatible RFID tags. A reader thus doubles up as a writer. Th...
A reader has the following maincomponents:TransmitterReceiverMicroprocessorMemoryController (which may reside asan ex...
Working A radio device called a tag is attached to the object that     needs to be identified. When this tagged object is ...
Backscatter modulation? A common way the communication between a tag and a  reader Reader sends a signal (energy) to a t...
Reader Tag Interaction
 A tag consist of a dipole antenna attached to an interdigital transducer  (IDT) placed on a piezoelectric substrate. A ...
Software  private void Form1_Load(object sender, EventArgs e)  { rfid1 = new RFID(); rfid1.Attach += new      AttachEventH...
Design
Software Contd.  private void antennaCheckBox_CheckedChanged(object      sender, EventArgs e)  { rfid1.Antenna = cboxAnten...
Software Contd.  void rfid_Attach(object sender, AttachEventArgs e)   { Phidgets.RFID phid = (Phidgets.RFID)sender;     lb...
Software Contd.  void rfid_Tag(object sender, TagEventArgs e)  { txtTag.Text = e.Tag;   lastRFIDTag = txtTag.Text;  rfid1....
After reading Tags.
FrequencyLF band: 125 and 135 kHz--LF generally use passivetagsHF band 3 MHz to 30 MHTypical Frequency: 13.56 MHz--HF s...
Frequency Contd.   UHF band:300 MHz to 1 GHz   Typical Frequency :915 MHz--Uses both active and    passive tags   MW ba...
Technical Issues     Tag Collision     Reader Collision     Tag Readability     Read Robustness
Ethical Issues Passive RFID tags could conceivably used for surveillance  of unsuspecting tag carriers Embedding of RFID...
Advantages Contactless. An RFID tag can be read without any physical   contact between the tag and the reader. Writable da...
Advantages Contd.     Variety of read ranges.     Wide data-capacity range.     Support for multiple tag reads.     Pe...
Disadvantages  Poor performance with RF-opaque and RF-absorbent   objects.  Impacted by environmental factors.  Limitat...
CONCLUSION  RFID, is an emerging technology which can be used for a   variety of applications.  However, the potential f...
Questions?????????
Rfidppt398 (1)
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  • TK is figured as follows: $97 for ROA, mech & accy $22 for Lyn manufac $4.76 for burden (4%) Total of $123.76
  • Transcript of "Rfidppt398 (1)"

    1. 1. RFIDRADIO FREQUENCY IDENTIFICATION
    2. 2. What is RFID? Radio-frequency identification (RFID) is an automatic identification method using radio waves.RFID also began to see use in wildlife monitoring and research.RFID tags can be used to monitor animal movement withoutadversely affecting the animal,
    3. 3. There’s a chip
    4. 4. Implanted RFID tags in Humans
    5. 5. Applications Supply chain automation Asset tracking Medical applications People tracking Manufacturing Retail Warehouses Livestock Timing
    6. 6. The RFID System1. Tag.2. Reader.3. Reader antenna.4. Controller.5. Host and software system.6. Communication infrastructure.
    7. 7. Tag An RFID tag is a device that can store and transmit data to a reader in a contact less manner using radio waves. RFID tags can be classified in three different ways. Passive
    8. 8. Passive Tag No on-board power source (for example, a battery) Uses the power emitted from the reader to energize itself and transmit its stored data to the reader Reader always communicates first, followed by the tag.
    9. 9.  Smaller than an active or semi-active tag. It has a variety of read ranges starting with less than 1 inch to about 30 feet (9 meters approximately). Cheaper compared to an active or semi-active tag.
    10. 10. Tag An RFID tag is a device that can store and transmit data to a reader in a contactless manner using radio waves. RFID tags can be classified in three different ways. Passive Active
    11. 11. Active Tag  Has on-board power source (for example, a battery; other sources of power, such as solar, are also possible)  Own on-board power supply to transmit its data to a reader.  No need for readers emitted power for data transmission.
    12. 12.  A tag always communicates first, followed by the reader. Can broadcast its data to its surroundings even in the absence of a reader
    13. 13. Tag An RFID tag is a device that can store and transmit data to a reader in a contactless manner using radio waves. RFID tags can be classified in three different ways. Passive Active Semi-Active (Semi-Passive) Tags
    14. 14. Semi-Active (Semi-Passive) Tags  Have an on-board power source (for example, a battery)  Uses the readers emitted power for transmitting its data  Also called a battery-assisted tag.  Reader always communicates first, followed by the tag.
    15. 15. Another way to Classify Tags  Read-only (RO)  Write once, read many (WORM)  Read-write (RW)
    16. 16. The RFID System 1. Tag. 2. Reader. 3. Reader antenna. 4. Controller. 5. Host and software system. 6. Communication infrastructure.
    17. 17. Reader???? An RFID reader can read from and write data to compatible RFID tags. A reader thus doubles up as a writer. The act of writing the tag data by a reader is called creating a tag.
    18. 18. A reader has the following maincomponents:TransmitterReceiverMicroprocessorMemoryController (which may reside asan external component)Communication interfacePower
    19. 19. Working A radio device called a tag is attached to the object that needs to be identified. When this tagged object is presented in front of a suitable RFID reader, the tag transmits this data to the reader (via the reader antenna). The reader then reads the data and has the capability to forward it over suitable communication channels. This application can then use this unique data to identify the object presented to the reader. It can then perform a variety of actions
    20. 20. Backscatter modulation? A common way the communication between a tag and a reader Reader sends a signal (energy) to a tag, and the tag responds by reflecting a part of this energy back to the reader. A charge device such as a capacitor contained in the tag makes this reflection possible. The capacitor gets charged as it stores the energy received from the reader. As the tag responds back, it uses this energy to send the signal back to the reader. The capacitor discharges in the process.
    21. 21. Reader Tag Interaction
    22. 22.  A tag consist of a dipole antenna attached to an interdigital transducer (IDT) placed on a piezoelectric substrate. A series of well-placed individual electrodes acting as reflectors are positioned on the substrate. The antenna applies an electrical impulse to the IDT when it receives the RF signal from a reader. Some of these waves are reflected back to the IDT by the reflectors; the rest are absorbed by the substrate. The reflected waves form a unique pattern, determined by the reflector positions, representing the tag data. These waves are converted back to the RF signal in the IDT and transmitted back to the RFID reader via the tag antenna. The reader then decodes the received signal to extract the tag data.
    23. 23. Software private void Form1_Load(object sender, EventArgs e) { rfid1 = new RFID(); rfid1.Attach += new AttachEventHandler(rfid_Attach); rfid1.Detach += new DetachEventHandler(rfid_Detach); rfid1.RFIDTag += new TagEventHandler(rfid_Tag); rfid1.RFIDTagLost += new TagEventHandler(rfid_TagLost); rfid1.open(); }
    24. 24. Design
    25. 25. Software Contd. private void antennaCheckBox_CheckedChanged(object sender, EventArgs e) { rfid1.Antenna = cboxAntenna.Checked; }
    26. 26. Software Contd. void rfid_Attach(object sender, AttachEventArgs e) { Phidgets.RFID phid = (Phidgets.RFID)sender; lblAttached.Text = " Attached: " + phid.Name; lblSerial.Text = " Serial: " + phid.SerialNumber; lblVersion.Text = " Version: " + phid.Version; } void rfid_Detach(object sender, DetachEventArgs e) { lblAttached.Text = "Not Attached"; }
    27. 27. Software Contd. void rfid_Tag(object sender, TagEventArgs e) { txtTag.Text = e.Tag; lastRFIDTag = txtTag.Text; rfid1.LED = true; // light on } void rfid_TagLost(object sender, TagEventArgs e) { txtTag.Text = ""; rfid1.LED = false; // light off lbPrevRFIDTags.Items.Insert(0, string.Format("Tag: {0} - {1}", ++TagCtr, lastRFIDTag)); }
    28. 28. After reading Tags.
    29. 29. FrequencyLF band: 125 and 135 kHz--LF generally use passivetagsHF band 3 MHz to 30 MHTypical Frequency: 13.56 MHz--HF system uses passivetags .HF systems are also widely used, especially in hospitalsThese frequency bands can be used freely worldwide.
    30. 30. Frequency Contd.  UHF band:300 MHz to 1 GHz  Typical Frequency :915 MHz--Uses both active and passive tags  MW band>1 GHz  Typical Frequency: 2.4 GHz or 5.8 GHz—Uses Semi active and passive tags.
    31. 31. Technical Issues  Tag Collision  Reader Collision  Tag Readability  Read Robustness
    32. 32. Ethical Issues Passive RFID tags could conceivably used for surveillance of unsuspecting tag carriers Embedding of RFID tags in humans: This has been proven to work, but should it be done?
    33. 33. Advantages Contactless. An RFID tag can be read without any physical contact between the tag and the reader. Writable data. The data of a read-write (RW) RFID tag can be rewritten a large number of times. Absence of line of sight. A line of sight is generally not required for an RFID reader to read an RFID tag.
    34. 34. Advantages Contd.  Variety of read ranges.  Wide data-capacity range.  Support for multiple tag reads.  Perform smart tasks.
    35. 35. Disadvantages  Poor performance with RF-opaque and RF-absorbent objects.  Impacted by environmental factors.  Limitation on actual tag reads.  Impacted by hardware interference.
    36. 36. CONCLUSION  RFID, is an emerging technology which can be used for a variety of applications.  However, the potential for abuse of this technology is vast and requires careful consideration to avoid.
    37. 37. Questions?????????
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