RFID SYSTEM AND RFID METHOD

• US 20080094178A1
• Filed: 10/18/2007
• Published: 04/24/2008
• Est. Priority Date: 10/20/2006
• Status: Abandoned Application

• Current Assignee: Cavea Identification GmbH
• Original Assignee: Cavea Identification GmbH
• Inventors: Angerer, Franz
• Application Number:
  US11/874,746
• Publication Number:
  US 20080094178A1
• Time in Patent Office: Days
• US Class Current: 340/10.1
• 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: H01Q 1/2208 associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems methods or arrangements for sensing record carriers, e.g. for reading patterns G06K7/00; record carrier for use with machines and with at least a part designed to carry digital markings G06K19/00

Abstract

The invention concerns the field of RFID (“radio frequency identification”), a technology for the wireless identification of objects, which has been used for a considerable time for the automatic retrieval of information regarding persons, animals, commodities and goods items. In particular the invention concerns an RFID system (10b) with at least one reading unit (12b) for the identification of transponders (14b), which are located in a spatial registration field (16b) of the reading unit (12b). While maintaining low installation and operating costs for the system (10b), nevertheless to make possible particularly reliable registration and error-free identification of the transponders, shielding (20b) is provided, which bounds the registration field (16b). Particularly advantageously the invention can be integrated e.g. into materials handling technology in the field of production and/or logistics.

Claims

1. An RFID system with at least one reading unit (12) for the identification of transponders (14), which are located in a spatial registration field (16) of the reading unit,

characterised by shielding (20) that bounds the registration field (16).

2. The system according to claim 1, wherein

the shielding (20) surrounds the registration field (16) for the most part, in particular surrounds it essentially completely.

3. The system according to claim 1, wherein

the shielding (20) is designed such that it absorbs at least 50% of a radiation power output of the system.

4. The system according to claim 1, wherein

a radiation power output of the systems is dimensioned to be so large that operation of the system without the shielding (20) would be legally prohibited.

5. The system according to claim 1, wherein

the shielding (20) comprises an electrically conducting lattice or mesh structure.

6. The system according to claim 5, wherein

the lattice or mesh structure comprises metal bars and/or perforated metal plate and/or wire netting and/or wire mesh.

7. The system according to claim 5, wherein

a characteristic lattice or mesh separation distance (a) is dimensioned to be at least a factor 2 smaller than the wavelength of an electromagnetic radiation of the system.

8. The system according to claim 1, wherein

the shielding (20) comprises a plurality of shielding layers arranged one behind another.

9. The system according to claim 1, wherein

at least one part of the shielding (20) is designed as a gate (22), which in an open position permits the introduction and removal of objects (18) fitted with transponders (14), and which shields in a closed position.

10. The system according to claim 9, comprising at least two gates (22), of which one is provided for the introduction of the objects (18), and another is provided for their removal.

11. An RFID method for the identification of transponders (14), which are located in a spatial registration field (16) of a reading unit (12),

characterised in that the registration field is shielded.

12. The method according to claim 11, wherein

the registration field (16) is surrounded by shielding (20) for the most part, in particular essentially completely.

13. The method according to claim 11, wherein

an absorption of at least 50% of a radiation power output of the reading unit (12) is provided by the shielding (20).

14. The method according to claim 11, carried out with a radiation power output, which without the use of the shielding (20) would be legally prohibited.

15. The method according to claim 11, wherein

at least a part of the shielding (20) can be moved in a gate-like manner between an open position and a closed position, objects (18) fitted with transponders are introduced and/or removed in the open position, and in the closed position the identification of the transponders (14) is carried out.

16. The method according to claim 15, wherein

at least two gate-like moveable shielding parts (22) are provided, of which one is used for the introduction of the objects (18), and another is provided for their removal.