Device for verifying a location and functionality of a radio-frequency identification (RFID) tag on an item

• US 20090167502A1
• Filed: 12/31/2007
• Published: 07/02/2009
• Est. Priority Date: 12/31/2007
• Status: Abandoned Application

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Jesme, Ronald D., Erickson, David P., McGee, James P., Waldner, Michele A.
• Application Number:
  US12/006,284
• Publication Number:
  US 20090167502A1
• Time in Patent Office: Days
• US Class Current: 340/10.300
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
• CPC Class Codes: H04Q 2209/47 using RFID associated with sensors
• CPC Class Codes: H04Q 2209/75 by polling or interrogating the sub-stations
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Abstract

A Radio-Frequency Identification (RFID) system verifies proper placement and functionality of RFID tags with respect to particular end-use RFID systems at the time the RFID tag is applied to an item but before the item is deployed. A device for verifying a location and functionality of an RFID tag on an item includes an item holder, a power coupling mechanism attached to the item holder, and an RFID reader electrically connected to the power coupling mechanism. The power coupling mechanism creates a near field for transmission of read or write commands from the RFID reader to an RFID tag on an item placed on the item holder to verify the location and functionality of the RFID tag as applied to the item with respect to a near-field coupling mechanism of a particular end-use RFID system. The device may include additional power coupling mechanisms for testing the functionality of the tag.

Claims

1. A device for verifying a location and functionality of a radio-frequency identification (RFID) tag on an item, comprising:

an item holder;

a signal line affixed to the item holder; and

an RFID reader electrically connected to the signal line,

wherein the signal line creates a near field for transmission of read or write command signals from the RFID reader to an RFID tag applied to an item placed on the item holder, and

wherein the RFID reader verifies the location and the functionality of the RFID tag with respect to a near-field coupling mechanism of a particular end-use RFID system.

2. The device of claim 1, wherein an output power of the RFID reader is controlled to produce the read or write command signals from the signal line at a minimum field strength that has been determined to be reliably produced by the RFID reader in the end-use RFID system, and wherein the device determines whether the read or write command signals are received by the RFID tag.

3. The device of claim 2, wherein the device alerts a user when the RFID tag fails to respond to the read or write command signals having the minimum field strength.

4. The device of claim 1, wherein the signal line is of a type for use with the end-use RFID system.

5. The device of claim 1, wherein the device comprises a conversion station for converting non-RFID-tagged items to RFID-tagged items.

6. The device of claim 5, wherein the conversion station includes a barcode scanner for reading a barcode on the item, and wherein the RFID reader writes information obtained from the barcode by the barcode scanner to the RFID tag.

7. The device of claim 1, wherein the device comprises a readable volume and a non-readable volume such that when an RFID tag is within the readable volume, the RFID tag is properly located on an item, and when an RFID tag is within the non-readable volume of the holder, the RFID tag is not properly located on an item;

wherein the device signals to a user when the RFID tag is properly located on an item.

8. The device of claim 1, further comprising a sensor attached to the item holder, wherein when the sensor is activated, the signal line transmits read or write command signals.

9. The device of claim 1, wherein the item holder is designed to hold a file having an RFID tag attached to the file.

10. The device of claim 1, further comprising:

a mount extending outwardly from the item holder; and

a dipole antenna affixed to the mount;

wherein the dipole antenna creates a far field for transmission of read or write command signals from the RFID reader to an RFID tag on an item placed on the item holder, and

wherein the RFID reader verifies the location and functionality of the RFID tag with respect to a far-field coupling mechanism of a particular end-use RFID system for the RFID tagged item.

11. The device of claim 1, further comprising:

a loop antenna affixed to the item holder at a position to create a near field for transmission of read or write command signals from the RFID reader to an RFID tag on an item placed on the item holder, and

wherein the RFID reader verifies the location and functionality of the RFID tag with respect to a magnetic near-field coupling mechanism of a particular end-use RFID application.

12. A method of verifying a location and functionality of a radio-frequency identification (RFID) tag on an item, comprising:

providing a device for verifying a location and functionality of an RFID tag on an item, the device comprising an item holder, a signal line attached to the item holder, and an RFID reader electrically connected to the signal line, wherein the signal line creates a near field for transmission of read or write command signals from the RFID reader to an RFID tag applied to an item placed on the item holder, and wherein the RFID reader verifies the location and functionality of the RFID tag with respect to a near-field coupling mechanism of a particular end-use RFID system;

calibrating the device such that the device produces a near field that simulates a near field expected to produced by the near-field coupling mechanism of the end-use RFID system;

attaching an RFID tag to an item;

inserting the item into the item holder of the device;

transmitting RF signals from the RFID reader to the RFID tag with the signal line at a power level for simulating the end-use RFID system; and

verifying the functionality of the RFID tag with respect to the end-use RFID system upon determining that the RF signals were successfully received by the RFID tag.

13. The method of claim 12, further comprising providing an alert to a user when the RFID tag fails to communicate with the RFID reader.

14. The method of claim 12, wherein verifying further comprises verifying that the RFID tag is in a proper location on the item when the signals were successfully received by the RFID tag.

15. The method of claim 12, wherein calibrating the device comprises calibrating power level of reader to produce the near field at a strength at the location of the RFID tag that is substantially equal to a minimum field strength that has been determined to be reliably produced from an RFID antenna in the end-use interrogation system.

16. The method of claim 12, wherein the verifying step further comprises verifying the proper location when the RFID tag on the item is within a readable volume of the item holder, and signaling that the RFID tag is not in a proper location on the item when the RFID tag on the item is not with a readable volume of the item holder.

17. The method of claim 12, further comprising detecting presence of the item in the item holder with a sensor attached to the item holder, wherein when the sensor is activated, the signal line transmits read or write command signals.

18. The method of claim 12, wherein attaching the RFID tag to an item comprises attaching the RFID tag to a file.

19. A system for verifying a location and functionality of a radio-frequency identification (RFID) tag on an item, comprising:

an item having an RFID tag attached to the item;

a device comprising;

an item holder to hold the item;

a signal line attached to the item holder, and

an RFID reader electrically connected to the signal line, wherein the signal line creates a near field for power coupling with the RFID tag on the item when the item is placed on the item holder, and wherein the RFID reader verifies the location and functionality of the RFID tag with respect to a near-field coupling mechanism of a targeted end-use RFID system; and

a computer in operative connection to the RFID reader, wherein the device interacts with software running on the computer to characterize the performance of RFID tag with respect to the near-field coupling mechanism of the end-use RFID system and provide a user with feedback on the performance characteristics of the RFID tag.

20. The system of claim 19, further comprising:

a display; and

software executing on the computer to present a user interface by which a user calibrates the device to simulate the end-use RFID system.

21. The system of claim 19, wherein the device comprises a conversion station for converting non-RFID-tagged items to RFID-tagged items.

22. A device for verifying a location and functionality of a radio-frequency identification (RFID) tag on an item, comprising:

an item holder;

an RFID reader; and

at least two power coupling mechanisms connected to the RFID reader for power coupling with an RFID tag affixed to an item placed within the item holder, wherein the at least two power coupling mechanisms include at least;

(i) a first power coupling mechanism that produces an electric field for near-field power coupling with the RFID tag, and (ii) a second power coupling mechanism that produces an electromagnetic field for far-field coupling with the RFID tag.

23. The device of claim 22,

wherein the first power coupling mechanism is a signal line affixed to the item holder that creates a near field for transmission of read or write command signals from the RFID reader to the RFID tag, wherein the RFID reader verifies the location and functionality of the RFID tag with respect to a near-field coupling mechanism of a particular end-use RFID system;

and

wherein the second power coupling mechanism is a dipole antenna for transmission of read or write command signals from the RFID reader to the RFID tag, wherein the RFID reader verifies the location and functionality of the RFID tag as applied to the item with respect to a far-field coupling mechanism of a particular end-use RFID system.

24. The device of claim 22,

wherein the first power coupling mechanism is a loop antenna for transmission of read or write command signals from the RFID reader to an RFID tag on an item placed on the item holder, wherein the RFID reader verifies the location and functionality of the RFID tag as applied to the item with respect to a magnetic near-field coupling mechanism of a particular end-use RFID application, and

wherein the second power coupling mechanism is a dipole antenna for transmission of read or write command signals from the RFID reader to the RFID tag, wherein the RFID reader verifies the location and functionality of the RFID tag as applied to the item with respect to a far-field coupling mechanism of a particular end-use RFID system.

25. The device of claim 22,

wherein the first power coupling mechanism is a pair of plates for transmission of read or write command signals from the RFID reader to an RFID tag on an item placed on the item holder, wherein the RFID reader verifies the location and functionality of the RFID tag as applied to the item with respect to a near-field coupling mechanism of a particular end-use RFID application, and

wherein the second power coupling mechanism is a dipole antenna for transmission of read or write command signals from the RFID reader to the RFID tag, wherein the RFID reader verifies the location and functionality of the RFID tag as applied to the item with respect to a far-field coupling mechanism of a particular end-use RFID system.