System for inspection and separation of defective RFID tags in batch conversion of RFID tag to RFID label

• US 20080189059A1
• Filed: 02/06/2007
• Published: 08/07/2008
• Est. Priority Date: 02/06/2007
• Status: Abandoned Application

• Current Assignee: Alex Poh Teck Choong, Yew Sang Chin
• Original Assignee: Alex Poh Teck Choong, Yew Sang Chin
• Inventors: Choong, Alex Poh Teck, Chin, Yew Sang
• Application Number:
  US11/702,880
• Publication Number:
  US 20080189059A1
• Time in Patent Office: Days
• US Class Current: 702/57
• CPC Class Codes: G05B 19/41875 characterised by quality surveillance of production
• CPC Class Codes: G05B 2219/32177 Computer assisted quality surveyance, caq
• CPC Class Codes: G05B 2219/32212 If parameter out of tolerance reject product
• CPC Class Codes: G05B 2219/32218 Sort workpieces as function of quality data
• CPC Class Codes: Y02P 90/02 Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Abstract

A RFID detection and separation device for a RFID Conversion system incorporating a microcontroller, a liner unwinding station, a RFID reel unwinding station, a RFID feeding station, a liner feeding station. The microcontroller controls the movement of an inlay reel of RFID tags from the RFID reel unwinding station into the RFID feeding station, said microcontroller also controlling the movement of a reel of liner mounted on a Liner Unwinding station, through a liner feeding station, for the separation of the RFID tags from the inlay reel for embedding onto the liner to produce RFID labels.

In its separation mode, a RFID tag is inspected and if found good, the RFID tag is separated by the RFID detection and separation device and dispensed onto a liner to form a RFID label. Upon detection of a defective RFID tag, the RFID detection and separation device goes into a non-separation mode, whereby the defective RFID tag goes past the RFID detection and separation device without separation from the inlay reel. As a result only good RFID labels are produced.

Claims

1. A RFID detection and separation device for a RFID Conversion system, said RFID Conversion system having a microcontroller, a liner unwinding station, a RFID reel unwinding station, a RFID feeding station, a liner feeding station, said microcontroller controlling the movement of an inlay reel of RFID tags from said RFID reel unwinding station into said RFID feeding station, said microcontroller also controlling the movement of a reel of liner mounted on said Liner Unwinding station, through said liner feeding station, for the separation of the RFID tags from said inlay reel for embedding onto the liner to produce RFID labels,

wherein in a separation mode, the RFID tag is inspected and if found good, the RFID tag is separated by the RFID detection and separation device and dispensed onto said liner to form said RFID label, and upon detection of a defective RFID tag, the RFID detection and separation device goes into a non separation mode, whereby the defective RFID tag passes the RFID detection and separation device without separation from said inlay reel.

2. A RFID detection and separation device for a RFID Conversion system, as claimed in claim 1, further comprising:

a RFID inspection unit; and

a RFID separator;

wherein said RFID tag is accurately positioned for inspection by said RFID inspection unit, and if said RFID tag is found defective, said RFID separator is retracted, allowing said defective RFID tag to remain on said inlay reel to return to said RFID Conversion System and if found good, said RFID separator is not retracted, thereby allowing said RFID tag to be embedded onto said liner, to form the RFID label.

12. The device of claim 2, wherein said RFID inspection unit comprises a RFID reader to read the RFID tag.

13. The device of claim 12 wherein said RFID reader is mounted with an electronic shield to direct electronic signals of the RFID reader onto the RFID tag immediately below said RFID inspection unit so as to only read said RFID tag immediately below said RFID inspection unit.

14. The device of claim 12 wherein said RFID reader is mounted with a RFID signal deflector to direct the electronic signals of the RFID reader onto the RFID tag immediately below said RFID inspection unit so as to only read said RFID tag immediately below said RFID inspection unit.

15. The device of claim 12 wherein said RFID reader is mounted with a RFID signal guide to guide the electronic signals of the RFID reader onto the RFID tag immediately below the RFID inspection unit so as to only read said RFID tag immediately below said RFID inspection unit.

16. The device of claim 2, wherein said RFID separator 9 is positioned above said liner and in a separation mode is in an extended state so that as said RFID inlay reel with the RFID tags on it goes over said RFID separator, said RFID separator separates the RFID tags from said RFID inlay reel allowing the RFID tags to be dispensed onto said liner, thereby embedding the RFID tag onto said liner, to form RFID labels.

17. The device of claim 2, wherein said RFID separator is positioned above said liner and upon detection of a defective RFID tag, said RFID detection and separation device goes into a non-separation mode whereby said microcontroller sends a signal to said RFID separator, causing it to retract and as said RFID separator is no longer in an extended state, said RFID inlay reel with the defective RFID tag on it round goes over said retracted RFID separator, said inlay reel forming a free loop, so that the defective RFID tag would not be dispensed onto said liner, and instead is returned to a winding station.

18. The device of claim 2, wherein said RFID separator has an edge, and wherein upon detection by said RFID inspection unit of a defective RFID tag, the RFID detection and separation device goes into a non-separation mode, whereby the position of the defective RFID tag is recorded by said microcontroller, which continues to move said inlay reel with the defective RFID tag along until it reaches said edge of said RFID separator, said microcontroller sends a signal to inlay reel brakes so that it closes on said inlay reel and at the same time, the RFID separator retracts, and said RFID inlay forms a free loop around the retracted RFID separator, so that the RFID tag on said inlay reel is not dispensed onto said liner and instead returns to a winding station.

19. The device of claim 2, wherein said RFID separator is positioned above said liner so that after the defective RFID tag has been detected by said RFID inspection unit, and after the defective RFID tag has gone past the retracted RFID separator, the RFID detection and separation device goes back to its separation mode whereby said microcontroller sends a signal to inlay reel brakes to release said RFID inlay, and said RFID separator moves back to its normal extended position, and the RFID tags are moved forward through the RFID detection and separation device to continue the RFID conversion process.

20. The device of claim 16, wherein said RFID separator comprises a retractable knife edge.

21. The device of claims 16, wherein said RFID separator comprises a retractable blade.

29. The device of claim 17, wherein said RFID separator comprises a retractable knife edge.

30. The device of claim 18, wherein said RFID separator comprises a retractable knife edge.

31. The device of claim 19, wherein said RFID separator comprises a retractable knife edge.

32. The device of claim 17, wherein said RFID separator comprises a retractable blade.

33. The device of claim 18, wherein said RFID separator comprises a retractable blade.

34. The device of claim 19, wherein said RFID separator comprises a retractable blade.

3. A system comprising a RFID detection and separation device to detect and separate a defective RFID tag for a RFID Conversion system, the system having:

a RFID inspection unit;

a RFID separator; and

a RFID positioning unit;

wherein said RFID Positioning unit positions the RFID tag accurately with respect to the REID inspection unit and RFID separator in the detection and separation of a RFID tag for embedding onto a liner to produce a RFID label and in the detection and non-separation of a defective RFID tag from an RFID inlay reel if a defective RFID tag is found.

4. A system to detect and separate a defective RFID tag for a RFID Conversion system, as claimed in claim 3, the system further comprising:

a RFID Tensioning unit;

wherein said RFID Tensioning unit maintains a constant tension in said RFID inlay reel, to prevent reel breakage at high operation speed.

5. The system of claim 4, wherein said RFID tensioning Unit comprises a plurality of dancers and a pair of inlay reel brakes.

6. The system of claim 4, wherein said RFID Tensioning Unit comprises a servomotor with torque control.

7. The system of claim 4, wherein said RFID Tensioning Unit comprises a motor and clutch.

8. A system to detect and separate a defective RFID tag for a RFID Conversion system, as claimed in claim 5, wherein after a defective RFID tag is detected by said RFID inspection unit, and moves on over the RFID separator, said inlay reel brakes closes on said inlay reel to stop said inlay reel from moving and at the same time said RFID separator is retracted, so that the RFID tag does not separate from said inlay reel to be embedded onto said liner to return to a winding station and thereafter said pair of inlay reel brakes opens, said inlay reel moves forward with another RFID tag to be inspected.

9. The system of claim 3, wherein said RFID Positioning unit comprises a vision system which checks the position of the RFID tag to ensure it is accurately positioned with respect to said RFID separator so that the RFID tag can be read accurately by said RFID inspection unit after each dispensing cycle.

10. The system of claim 3, wherein said RFID Positioning unit comprises a vision system which checks and adjusts the position of the RFID tag on said inlay reel so that only the RFID tag directly below said RFID inspection unit is inspected.

11. The system of claim 3, wherein said RFID Positioning unit comprising an imaging system which takes an image of the RFID tag, checks and adjusts the position of the RFID tag on said inlay reel so that only the RFID tag directly below said RFID inspection unit is inspected.

22. The system of claim 5, wherein said pair of inlay reel brakes is in an opened position, when the RFID detection and separation device is in a separation mode, such that the RFID tags on said inlay reel are moved through said RFID inspection unit, and when a good RFID tag is detected by said RFID inspection unit, said inlay reel brakes remain open so that said inlay reel with the good RFID tag moves past the RFID separator, to be dispensed onto said liner, to produce RFID labels.

23. The system of claim 5, wherein said pair of inlay reel brakes is in an opened position, when the RFID tags on said inlay reel are moved through said RFID inspection unit, and when a defective RFID tag is detected by said RFID inspection unit, the RFID detection and separation device goes into a non-separation mode, whereby said microcontroller closes said pair of inlay reel brakes together to stop movement of said inlay reel and at the same time, said microcontroller retracts the RFID separator, causing said RFID inlay to form a free loop around the retracted RFID separator, so that the RFID tag on said inlay reel is not dispensed onto said liner and instead returns to a winding station.

24. The system of claim 5, wherein said pair of inlay reel brakes, after the defective RFID tag has gone past the retracted RFID separator, to a winding station, the RFID detection and separation device goes back to its separation mode, whereby said microcontroller sends a signal to said inlay reel brakes to open, said RFID inlay is then released, causing the next RFID tag on said inlay reel to move through said RFID inspection unit, and the RFID separator moves back to its normal extended position, so that the RFID conversion process continues.

25. The system of claim 5, wherein said pair of inlay reel brakes of said RFID Tensioning Unit comprises a pair of clamping cylinders.

26. The system of claim 5, wherein said pair of inlay reel brakes of said RFID Tensioning Unit comprises a pair of clamping discs.

27. A method to detect and separate defective RFID tags comprising the steps of:

providing a RFID detection and separation device for a RFID Conversion system, said RFID Conversion system having a microcontroller, a liner unwinding station, a RFID reel unwinding station, a RFID feeding station, a liner feeding station, an RFID tensioning unit having a pair of inlay reel brakes, an RFID separator, and a RFID positioning unit, said microcontroller controlling the movement of an inlay reel of RFID tags from the RFID reel unwinding station into the RFID feeding station, said microcontroller also controlling the movement of a reel of liner mounted on said Liner Unwinding station, through said liner feeding station, for the separation of the RFID tags from said inlay reel for embedding onto the liner to produce RFID labels,

Inspecting a RFID tag as it goes under said RFID Positioning Unit;

sending an electronic signal from a RFID reader to read the RFID tag;

identifying a defective RFID tag and sending a signal to said microcontroller, which continues to move said RFID inlay reel containing said defective RFID tag;

until it reaches said RFID separator,

sending a signal to said pair of inlay reel brakes of said RFID Tensioning unit to stop movement of said RFID inlay reel, when the defective RFID tag goes over said RFID separator 9,

retracting said RFID separator so it is no longer in an extended state,

allowing said RFID inlay reel with the defective RFID tag 7 on it to go over the retracted RFID separator, said RFID inlay reel forming a free loop, so that the defective RFID tag would not be dispensed onto said liner, and instead returns to a winding station;

sending a signal to said pair of inlay reel brakes of said RFID Tensioning unit to release said RFID inlay reel,

extending said RFID separator so that it moves back to its normal extended position,

so that the next RFID tag is moved forward to the inspection unit to be inspected,

and thereby continuing the RFID Batch conversion process until said microcontroller detects either the end of said RFID inlay reel or said liner is reached and after which the RFID Batch Conversion process is stopped.

28. The method to detect and separate defective RFID tags as claimed in claim 27, whereby the steps of Inspecting a RFID tag as it goes under said RFID Positioning unit, detecting a defective RFID tag, moving the RFID tag past said RFID separator which is then retracted, applying said inlay reel brakes of said RFID Tensioning Unit on said inlay reel to stop momentarily the movement of said inlay reel so that said inlay reel forms a free loop around said RFID separator, releasing said inlay reel brakes to move the next RFID tag to be inspected, all these steps being controlled by said microcontroller.