Design of a Cigarette Sorting System Based on RFID Technology

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Design of a Cigarette Sorting System Based on
RFID Technology

• Zhang Lei
• Shenyang Institute of Automation, Chinese Academy
  of Sciences

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Outline

• Introduction
• System Architecture Design
• Design of Software
• Hardware Design of CAN Intelligent Node
• Conclusion

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Introduction
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Introduction
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System Architecture
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Design of Software

• Communication protocol
• Development of RFID readers driver
• The interface of upper machine software

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Communication protocol

• The specific protocol is based on CAN 2.0B
• Extended frame which is defined by 29 identifier
  bits,2 bytes more than standard frame, provides
  more flexibility, reliability as well as
  expansion.
• The protocol is designed as IDcommandsdata

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The frame format of protocol
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• DIR DIR decides a half of message priority
  during bus access, and the remaining priority is
  defined by nodes address. The lower address has
  higher priority.
• RFID Reader/ Antenna Each Sense1824 reader
  equips 4 antennas. There are about 13 readers in
  our system. So 4 bits is used to identify RFID
  readers and 2 bits is used to identify antennas.

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• Address ID18-ID0 participates in the acceptance
  filter, which identifies 50 working positions.
• DLC Data length (1-8).
• Data the contents of packages.
• Data Type The format of data type is shown in
  Table below.

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Functional definition of data type
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Development of RFID readers driver

• MCGS divides the actual equipment into 3 parts
  independent equipment, father equipment and son
  equipment.
• RFID reader, as a son equipment, communicates
  with MCGS configuration software through the
  serial communication father equipment.
• we can evoke standard serial functions provided
  by father equipment to develop the son equipment
  driver.

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RFID reader flow chat
The API functions are described as
follows ScsAntennaReceiveSelect a receiving
antenna. ScsAntennaTransmitSelect a sending
antenna. SaharaListStartStart the reading tag
process. SaharaListReportGet tags data from
readers. SaharaListEndEnd the read tag process
and turn microwave power off.
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The interface of upper machine software

• Upper machine software has been implemented by
  MCGS 5.5, Visual Basic 6.0 and SQL Server2000.
• It consists of equipment driver module, data
  access module, data analysis and processing
  module, front monitor module and database module.

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• MCGS configuration software manages hardware,
  schedule processing and also controls the data
  stream. Depending on the abundant resources of
  MCGS, some complex functions, such as statistics,
  reports and phonic warning, etc. can be easily
  achieved.
• The interface of upper machine software is shown
  in figure 4.

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Hardware design of CAN intelligent node
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Conclusion

• Present a new design strategy of cigarette
  sorting system by combining RFID technology with
  CAN bus
• MCGS makes configuration more flexible and easy
  to maintain
• LCD touch-screen simples the operation processes
  and enhances sorting efficiency and accuracy.

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Thank You!