1 EPCglobal Training Suite. 2 What is RFID? Radio Frequency IDentification Contactless communication...
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Transcript of 1 EPCglobal Training Suite. 2 What is RFID? Radio Frequency IDentification Contactless communication...
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What is RFID?What is RFID?
Radio Frequency IDentification• Contactless communication between objects• Communication by reflected power• Can identify objects in communication range
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History of RFIDHistory of RFID
World War II (1939~1950)• IFF (Identity : Friend or Foe) used in U.K. Air Force
Oct. 1948• “Communication by Means of Reflected Power” proposed by Harry
Stockman (Senior of the Institute of Radio Engineers)
1960 ~ 1970• First RFID business application “Electronic Article
Surveillance (EAS)” published
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History of RFIDHistory of RFID
1990 ~ 2000• The organization EPCglobal is set up by EAN and UCC to
achieve worldwide adoption and standardization of Electronic Product Code (EPC) technology
2000 ~ present• Wal-Mart uses RFID techniques for tracking goods in supply
chain• RFID techniques are used in open system
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RFID ComponentsRFID Components
Tag• The data carrier that can attach to goods, pallets, containers or be
carried by people
• Composed by silicon chip and antenna
• Usually communicate with Reader passively
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RFID ComponentsRFID Components
Interrogator (Reader)• Send radio frequency signal to activate Tags and to
communicate with Tags
• The device for reading, writing or doing other operations with tags
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Classification of Radio FrequencyClassification of Radio Frequency
Low Frequency (LF)• 125KHz, 135KHz are used• Lower interference by metal and water• Lower reading range• Lower data transmit rate
High Frequency (HF)• 13.56MHz is used• Lower reading range• Higher data transmit rate than LF• Capable for reading multiple tags at a time
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Classification of Radio FrequencyClassification of Radio Frequency
Ultra High Frequency (UHF)• 433MHz, 860~960MHz are used• Lower antenna implement cost• High reading range• High data transmit rate• High interference by metal and water
Microwave (MV)• 2.45 GHz is used• Highest reading range• No standardized
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Classification of Radio FrequencyClassification of Radio Frequency
Lower Frequency
High Frequency Ultra High Frequency
Microwave
Frequency 10KHz ~ 1MHz 1MHz ~ 400MHz 400MHz ~ 1GHz 1GHz or above
ReadingRange 0 ~ 3 cm 1 ~ 15 cm 1 ~ 600 cm Hundred
meters
Transmit Rate Low Low High High
Metal/Water Interference No No Yes Yes
Multiple Tags Reading No Yes Yes Yes
Standardized Yes Yes Yes No
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Classification of Tag CapabilityClassification of Tag Capability
Passive Tag• Activated by Reader• Low cost and communication range
Semi-Passive Tag• Built-in battery but communicating passively• Higher communication range and data transmit rate
Active Tag• Built-in battery and communicating actively• Highest communication range and data transmit rate
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Pros and Cons of RFIDPros and Cons of RFID
Pros• Larger data storage space, and data is editable• Read multiple Tags at same time. Higher efficiency• Tag can encapsulate to protect environment impact
Cons• Higher cost • Easy influenced by water, metal, and environment conditions
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Basic ApplicationsBasic Applications
Electronic Payment System• Easy Card (悠遊卡 )• I Card (一卡通 )• Octopus (八達通 )