Transponder reading transducer to control passages

• US 6,567,002 B2
• Filed: 06/26/2001
• Issued: 05/20/2003
• Est. Priority Date: 09/08/2000
• Status: Expired due to Term

• Current Assignee: Alessandro Manneschi, Giovanni Manneschi
• Original Assignee: Alessandro Manneschi, Giovanni Manneschi
• Inventors: Manneschi, Alessandro, Manneschi, Giovanni
• Primary Examiner(s): Lee, Benjamin C.
• Assistant Examiner(s): Nguyen, Phung
• Application Number:
  US09/888,602
• Publication Number:
  US 20020030599A1
• Time in Patent Office: 693 Days
• Field of Search: 340/572.1, 340/572.7, 340/5.2, 340/5.6, 340/5.7, 343/700.MS, 235/450, 235/449, 235/439, 342/30, 342/42
• US Class Current: 340/572.1
• CPC Class Codes: G07C 2009/00777 by induction
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks
• CPC Class Codes: G07C 9/00896 specially adapted for particular uses
• CPC Class Codes: G07C 9/00944 Details of construction or manufacture
• CPC Class Codes: H01Q 1/2216 used in interrogator/reader equipment
• CPC Class Codes: H01Q 1/362 for broadside radiating helical antennas
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Abstract

The invention consists of an elongated three-dimensional transducer (1), whose length is adequate to cover the areas in which the transponder that needs to be read can be placed, it is equipped with suitable means for it to be anchored to the floor, on the ceiling or on the wall near the passage that needs to be controlled, it includes at least two electric coils one of which is the transmitter (Tx) and the other one is the receiver (Rx), the first one is usually homopolar, while the second one is usually multipolar.

Claims

1. A card transponder reading transducer for controlling passages by reading the contents of an inductive card transponder assigned to the people or objects transiting through the passages, comprising:

an elongated three-dimensional column-shaped structure (1) with circular or elliptic cross section for supporting a plurality of electric coils;

means (2) to anchor the elongated three-dimensional column-shaped structure to the floor, on the ceiling or on the wall near the passage to be controlled; and

at least one transmitter (Tx) homopolar electric coil and at least on receiver (Rx) multipolar electric coils supported by the elongated three-dimensional column-shaped structure.

2. The card transponder reading transducer of claim 1, wherein the elongated column-shaped support structure is between 40 and 180 centimeters long.

3. The card transponder reading transducer of claim 1, wherein the elongated column-shaped supporting structure wherein said anchor means includes two end supports for securing the column-shaped supporting structure to a floor and/or to a ceiling.

4. The card transponder reading transducer of claim 1, wherein column-shaped supporting structure further includes a plurality of electric homopolar coils whose positions do not coincide.

5. The card transponder reading transducer of claim 1, wherein the column-shaped supporting structure further includes a plurality of electric multipolar receiver coils that are offset and whose positions do not coincide.

6. The card transponder reading transducer of claim 1, characterized by a column-shaped supporting structure wherein one or more distinct transmitter (Tx) homopolar electrical coils are combined with one or more distinct receiver (Rx) multipolar coils.