RFID reader

• US 5,621,199 A
• Filed: 04/03/1995
• Issued: 04/15/1997
• Est. Priority Date: 04/03/1995
• Status: Expired due to Term

• Current Assignee: Datalogic IP Tech S.r.l. (Datalogic S.p.A.)
• Original Assignee: Datalogic, Inc.
• Inventors: Lampkin, Mark C., Calari, Umberto
• Primary Examiner(s): Hajec, Donald T.
• Assistant Examiner(s): Wigmore, Steven
• Application Number:
  US08/415,853
• Time in Patent Office: 743 Days
• Field of Search: 235/375, 235/380, 235/491, 200/47, 200/302.1, 343/895, 343/788, 361/679, 340/572, 174/65 R, 174/65 G, 174/65 SS
• US Class Current: 235/375
• CPC Class Codes: G01S 13/758 using a signal generator powered by the interrogation signal
• CPC Class Codes: G06K 7/10316 using at least one antenna particularly designed for interrogating the wireless record carriers antennas in general H01Q1/22
• CPC Class Codes: G06K 7/10346 the antenna being of the far field type, e.g. HF types or dipoles
• CPC Class Codes: H01Q 23/00 Antennas with active circuits or circuit elements integrated within them or attached to them
• CPC Class Codes: H01Q 3/04 for varying one co-ordinate of the orientation

Abstract

A compact rf reader apparatus integrated into a single compact package structure. In one embodiment, a rotatably adjustable head is mounted on the compact reader body portion containing read/write electronics and an interface controller. The rotatably adjustable head contains an antenna and is adapted to direct the antenna in numerous different directions without moving the compact reader body portion of the rf reader. Additionally, in one embodiment, the rf reader unit includes a switching power supply located within the reader body portion. The switching power supply is electrically coupled to the read/write electronics and the interface controller, and is synchronized with the transmitting frequency of the antenna to prevent interference.

Claims

1. A stationary rf reader unit comprising:

an rf reader including an rf antenna,

a stationary compact reader body portion, said compact reader body portion containing read/write electronics and an interface controller therein, wherein said stationary compact reader body portion is adapted to be mounted on standard identification reader wall mounts, and

a rotatably adjustable head mounted to said stationary compact reader body portion such that an rf reader unit is comprised of a single integrated structure, said rotatably adjustable head containing said rf antenna therein and adapted to direct said rf antenna towards a plurality of different directions without moving said stationary compact reader body portion, wherein said rotatably adjustable head is further adapted to being fixed in a selected position such that said rf antenna remains focused in a desired direction.

2. The stationary rf reader unit of claim 1 wherein said stationary rf reader further includes a switching power supply disposed within said compact reader body portion and electrically coupled to said read/write electronics and said interface controller.

3. The stationary rf reader unit of claim 2 wherein said switching power supply is synchronized with the transmitting frequency of said rf antenna.

4. The stationary rf reader unit of claim 1 wherein said rf antenna is further comprised of wire-wrapped ferrite.

5. The stationary rf reader unit of claim 4 wherein said wire-wrapped ferrite rf antenna is securely potted within said rotatably adjustable head assembly.

6. The stationary rf reader unit of claim 1 wherein said stationary rf reader unit is liquid-tight.

7. The stationary rf reader unit of claim 1 wherein said rf reader further includes an O-ring seal between said rotatably adjustable head and said stationary compact reader body portion such the connection between said rotatably adjustable head and said compact reader body portion is liquid-tight.

8. The stationary rf reader unit of claim 1 wherein said compact reader body portion further includes an opening for receiving an interfacing cable into said stationary compact reader body portion.

9. The stationary rf reader unit of claim 8 wherein said stationary rf reader further includes a gland nut surrounding said opening for receiving said interfacing cable such the connection between said compact reader body portion and said interfacing cable is liquid-tight.

10. The stationary rf reader unit of claim 8 wherein said compact reader body portion further contains screw terminals therein for electrically connecting said interfacing cable to said read/write electronics and said interface controller.

11. The stationary rf reader unit of claim 1 wherein said interface controller further includes a built-in menu system for selecting product features of said rf reader unit.

12. The stationary rf reader unit of claim 1 wherein said rf reader is adapted to being connected to a multi-drop bus such that a plurality of said rf reader units can be controlled using a single controlling system.

13. The stationary rf reader unit of claim 1 wherein said interface controller further includes non-volatile memory for storing configuration parameters of said rf reader unit.

14. A stationary compact rf reader unit integrated into a single package structure comprising:

an rf reader including an rf antenna,

a stationary reader body portion, said stationary reader body portion containing read/write electronics and an interface controller therein, said stationary reader body portion further including an opening for receiving an interfacing cable into said stationary reader body portion, said stationary reader body portion further containing screw terminals therein for electrically connecting said interfacing cable to said read/write electronics and said interface controller, wherein said stationary reader body portion is adapted to be mounted on standard identification reader wall mounts,

a gland nut surrounding said opening for receiving said interfacing cable such the connection between said stationary reader body portion and said interfacing cable is liquid-tight,

a rotatably adjustable head mounted to said stationary reader body portion, said rotatably adjustable head containing said rf antenna therein and adapted to direct said rf antenna towards a plurality of different directions without moving said stationary reader body portion, wherein said rotatably adjustable head is further adapted to being fixed in a selected position such that said rf antenna remains focused in a desired direction,

an O-ring seal disposed between said rotatably adjustable head and said stationary reader body portion such that the connection between said rotatably adjustable head and said stationary reader body portion is liquid-tight, and

a switching power supply electrically disposed within said stationary reader body portion and coupled to said read/write electronics and said interface controller.

15. The stationary rf reader unit of claim 14 wherein said switching power supply is synchronized with the transmitting frequency of said rf antenna.

16. The stationary rf reader unit of claim 14 wherein said rf antenna is further comprised of wire-wrapped ferrite.

17. The stationary rf reader unit of claim 16 wherein said wire-wrapped ferrite rf antenna is securely potted within said rotatably adjustable head assembly.

18. The stationary reader unit of claim 14 wherein said interface controller further includes a built-in menu system for selecting product features of said rf reader unit.

19. The stationary rf reader unit of claim 14 wherein said stationary rf reader is adapted to being connected to a multi-drop bus such that a plurality of said rf reader units can be controlled using a single controlling system.

20. The stationary rf reader unit of claim 14 wherein said interface controller further includes non-volatile memory for storing configuration parameters of said rf reader unit.