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Rfid

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  1. PRESENTED BY : MUKESH KUMAR M.TECH(2010ECB1026)
  2.  RFID is an technology that uses radio-frequency waves to transfer data between a reader and a movable item to identify.  RFID is fast, reliable, and does not require physical sight or contact between reader/scanner and the tagged item  Types  Fixed RFID  Mobile RFID
  3.  RF tags  Antennas  Interrogators or reader  Host computers  Appropriate software
  4.  RFID tags are the heart of the RFID system because they store the information that describes the object being tracked.  Integrated circuit, Data is stored in ic and transmitted to the reader  Tags are classified 1. Active 2. Passive 3. Semi passive
  5. Contain a battery that runs the microchip’s circuitry. Tag is able to send a stronger signal to the reader due to battery. Allows a read range of about one hundred feet. complex
  6. Passive tags contain no batteries.  Passive tags get power from a reader.  Readers send electromagnetic waves that produce a current in the tag’s antenna which then powers the microchip’s circuits. A passive tags read range is approximately thirty feet.
  7. Containing characteristics of both active & passive tag. As far as their writing capability is concerned, tags can be divided as follows : Read only tag Write once read many tag Read & write tag
  8. Read-only contain data such as tracking numbers. These tracking numbers are usually serialized and pre-written onto them by the tag manufacturer. Read-only tags are usually the least expensive because information can not be added onto them as they move through the supply chain.
  9. Write-once tags allow a user to write information into the tag one time during the production. The information can be something like a batch or serial number. Full read-write tags allow for new data to be written to the tag as it is needed. These tags also allow for original data to be written over.
  10. allow a user to write information into the tag many time during the production.
  11. The antenna emits radio signals to activate the tag and to read and write data into the tag. The antenna is the channel between the tag and the transceiver, thus it controls the data attainment and communication. The antennas are available in many different shapes and sizes. For example an antenna can be built into a doorframe in order to collect data from people walking through the door.
  12.  The reader releases radio waves in ranges from one inch to 100 feet or more. The range depends on its output power and the radio frequency used.  When the RFID tag passes through the electromagnetic field it will then detect the reader’s activation signal.  At this point the reader will decode the data programmed in the tag’s circuit.  Finally, the data is passed to the host computer to be processed.
  13. Retail Supply chain process Supplier Manufacturing Retailer/ Distributor/ Distribution Retailer store Consumer
  14. Automate the Supply chain process RFID TAG Reader
  15.  Non-line of sight identification of tags  Unattended operations are possible, minimizing human errors and high cost.  RFID technology is better than bar codes as it cannot be easily replicated and therefore, it increases the security of the product.  Ability to identify moving elements that have tags embedded.  Larger area of coverage, up to several feet.
  16.  Expensive compared with Bar code  Bulkier, due to embedding of electronic components in the tag. However, with advanced techniques, it is possible to reduce the size, and weight of the tags to a large extent.  It is difficult for an RFID reader to read the information in case of RFID tags installed in liquids and metal products. The problem is that the liquid and metal surfaces tend to reflect the radio waves, which makes the tags unreadable  To physical/electrical damage due to
  17. RFID Chain management is an emerging technology Efficient method If efficiently implemented, RFID has the power to make computing an unobtrusive, intuitive part of everyday life.

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