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Published byHarry Lockey Modified over 9 years ago
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RFID Group Progress Leader: Muhammad Salman Younas Team: Jawad Khalil Sheikh Saad Al-Shaalan Muhammad Al-Khamees
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Identification technology that uses RF Tags come in all sizes and shapes Two main types of tags – Active: own power source(60-300 feet)($10-$80) – Passive: powered by reader(2inches-30feet)($0.20-$3) RFID tags are small radio transmitters and receivers Mainly three frequency types – LF: 125-134.2 kHz – HF: 13.56 MHz – UHF: 868-928 MHz What is RFID?
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Low Frequency – good penetration of materials (including water) – less susceptible to effect of metal – longer read range than HF – maximum read range: 12 inches High Frequency – supports anti-collision read – tags lighter and cheaper than LF tags – more memory capacity than LF tags – maximum read range: 4 feet Ultra-High Frequency – behave more like light waves than radio waves – perform poorly with water and metal – read range: 10+ feet RFID Tag Frequencies
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Read/Write range Materials present in surroundings Tag memory needed Cost Tag form (size, shape, etc..) Host application and Communication Protocol Power Consumption Antenna size Interference Factors Affecting Reader Choice
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Skyetek M1 Reader (Storage Room) Intensecomp Reader(Products Gate) Readers Used
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Achieved reader connectivity Performed Single Read Performed Anti-collision read Found maximum tag read ranges Testing in presence of water and metal Ran sample codes – Skyetek M1 reader: C, Java, C++, VB – Intensecomp reader: VB.NET, Java, VB, C Tasks Completed
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Maximum tag ranges Skyetek M1 Reader Tag Ranges 4-5 cm5-7 cm10-12 cm
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Larger the tag, greater the range – more signal reflection More the tags, less the range – less power supplied per tag Presence of water and metal – water and metals absorb HF waves – reduces range greatly Skyetek M1 Reader Tags
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Hardware – Reader connectivity problem power supply was not connected properly – No tags read problem internal antenna was not connected – Read range problem built own antenna Software – Java programs not running had to add Java commAPI classes Skyetek M1 Reader Problems
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Building the antenna Single Loop Antenna Copper Tape External Antenna Skyetek M1 Reader (Hardware)
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Adjust C3 and C4 values to obtain maximum range Skyetek M1 Reader (Hardware)
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Antenna built and test read was successful Skyetek M1 Reader (Hardware)
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Reading range from antenna very poor – use copper tape for antenna material without antenna with antenna Skyetek M1 Reader (Hardware)
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Java Application Skyetek M1 Reader (Software) SkyeTekCommSkyeTekMessagingSkyeTekListenerCRC16SkyeTekApplication SkyeTekCommImpl SkyeTekSerialComm SkyeTekReader SkyeTekTag Debug Format messagingreaderutilitydemo skyetek comm Numbers SkyeTekException
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Java Application Skyetek M1 Reader (Software)
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Java Application Skyetek M1 Reader (Software)
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Detecting tags depends greatly on their position Skyetek M1 Reader (Software)
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Antenna Multiplexer SkyePlus MXH Antenna Multiplexer Use multiple reader connections – a COM port needed for each M1 reader Skyetek M1 Multiple Readers
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Main application is in C# (.NET framework) RFID application – Skyetek M1 reader: Java – Intensecomp reader: VB.NET Intensecomp application can be easily integrated Skyetek M1 reader – main application running – needs to read tags – will call Java program to run Skyetek M1 Integration
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Product Gate if (new item at product gate) { if (product type of item not in DB) ask user to add product type; add item to DB; cancel item from expected order list; if (expected order list == 0) order received successfully; } Skyetek M1 Integration
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Storage Room while (true) { read all tags in room; if (count not equal to previous count) { if (tagID not in delivery list) theft detected; } Skyetek M1 Integration
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Hardware: Antenna built but range problem Software: Java application complete Next task: Integration into main system Expected completion date: Dec 18, 2006 Conclusion
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Q u e s t i o n S ? ?
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