COIL ARRANGEMENT FOR GENERATING A ROTATING ELECTROMAGNETIC FIELD AND POSITIONING SYSTEM FOR DETERMINING A POSITION OF AN IDENTIFICATION TRANSMITTER

• US 20150179332A1
• Filed: 03/02/2015
• Published: 06/25/2015
• Est. Priority Date: 09/01/2012
• Status: Active Grant

• Current Assignee: Volkswagen AG
• Original Assignee: Volkswagen AG
• Inventors: ETTE, Bernd, HOLLDACK, Bernhard
• Granted Patent: US 10,115,517 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01B 7/003 for measuring position, not involving coordinate determination coordinate measuring G01B7/004
• CPC Class Codes: G01R 33/0041 using feed-back or modulation techniques
• CPC Class Codes: G01S 1/70 using electromagnetic waves other than radio waves
• CPC Class Codes: G01S 13/767 Responders; Transponders teaching or practice apparatus for gun-aiming or gun-laying using reflecting targets or active targets F41G3/26
• CPC Class Codes: G01S 5/0226 Transmitters
• CPC Class Codes: G07C 9/28 the pass enabling tracking or indicating presence
• CPC Class Codes: H01F 17/0006 Printed inductances printed coils for dynamo-electric machines H02K3/26; printed circuits H05K
• CPC Class Codes: H01F 17/02 without magnetic core
• CPC Class Codes: H01F 17/04 with magnetic core
• CPC Class Codes: H01F 27/24 Magnetic cores
• CPC Class Codes: H01F 27/2847 Sheets; Strips H01F27/2866 takes precedence
• CPC Class Codes: H01F 27/40 Structural association with built-in electric component, e.g. fuse
• CPC Class Codes: H01F 3/00 Cores, Yokes, or armatures magnetic materials H01F1/00; permanent magnets H01F7/02
• CPC Class Codes: H01F 5/00 Coils superconducting coils H01F6/06; fixed inductances of the signal type H01F17/00
• CPC Class Codes: H01F 7/20 without armatures cores H01F3/00; coils H01F5/00 ; shaping metal by applying magnetic forces B21D26/14; electromagnets specially adapted for NMR applications G01R33/381
• CPC Class Codes: H01H 50/44 Magnetic coils or windings
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 7/08 Ferrite rod or like elongated core

Abstract

A coil arrangement is provided for generating a rotating electromagnetic field, comprising at least three coils, each having at least one associated coil winding. The coil arrangement further comprises a ferromagnetic coil yoke which establishes a magnetic coupling between the at least three coils.

Claims

1. A coil arrangement for generating a rotating electromagnetic field, the coil arrangement comprising:

at least three coils, each coil having at least one associated coil winding; and

a ferromagnetic coil yoke that establishes a magnetic coupling between the at least three coils.

2. The coil arrangement in accordance with claim 1, wherein the at least three coils are arranged in a coil plane, and wherein adjacent coils are arranged within the coil plane at angles of approximately 120°

.

3. The coil arrangement in accordance with claim 1, wherein a third coil of the at least three coils forms an angle with a coil plane spanned by a first and second coil of the at least three coils.

4. The coil arrangement in accordance with claim 1, wherein the ferromagnetic coil yoke is arranged continuous within the at least three coils, and wherein the coil arrangement furthermore comprises:

at least three capacitors, each of which is connected in series to one of the at least three coils; and

a housing having external electrical contacts and mechanical retention elements.

5. The coil arrangement in accordance with claim 1, wherein the ferromagnetic coil yoke has arms extending radially from a center, and wherein each of the coil windings of the at least three coils has a plurality of windings about one of the arms.

6. The coil arrangement in accordance with claim 1, wherein each of the coil windings is configured as a planar conductor forming windings on a printed circuit board, wherein the printed circuit board has recesses for the ferromagnetic coil yoke, and wherein the ferromagnetic coil yoke is arranged above and below the printed circuit board.

7. The coil arrangement in accordance with claim 1, wherein two or more coil windings, each having a number of windings that may be actuated jointly or separately, are arranged per coil, and wherein the coil arrangement further comprises at least three additional capacitors that are each connected in parallel to one of the two or more coil windings per coil.

9. A locating system for determining a position of an identification transmitter for a motor vehicle, the locating system comprising:

at least two coil arrangements according to claim 1, wherein the at least two coil arrangements are mounted and set up location-fast at different locations of the motor vehicle, each being operated as a transmitter for a rotating electromagnetic field; and

the identification transmitter having a receiver coil, wherein the identification transmitter is operated as a receiver for the at least two rotating electromagnetic fields.

10. The locating system in accordance with claim 9, further comprising a control device that actuates the at least two coil arrangements for transmitting the specific rotating electromagnetic field in a pre-specified sequence.

11. The locating system in accordance with claim 10, wherein the control device is coupled to the at least two coil arrangements via a bus system, wherein each of the at least two coil arrangements is coupled to a power supply line, wherein each of the at least two coil arrangements is set up in order to receive a control signal of the control device via the bus system and to generate the rotating electromagnetic field as a function of the control signal, and wherein the energy for transmitting the rotating electromagnetic field is obtained via the power supply line.

12. The locating system in accordance with claim 10, wherein the control device is set up for actuating the at least two coil arrangements such that they transmit the specific rotating electromagnetic field sequentially.

13. The locating system in accordance with claim 9, wherein at least one alternating voltage source is connected to the at least two coil arrangements and to one power supply line and is configured to supply the at least two coils in each coil arrangement with an alternating voltage in order to generate the rotating electromagnetic field, wherein the alternating voltages of the at least two coils are in a pre-specified phase relationship with one another, and wherein the phase relationship of adjacent coils is pre-specified as a function of an angle that these adjacent coils form with one another within a coil plane.

14. The locating system in accordance with claim 9, wherein a first coil arrangement of the at least two coil arrangements is installed in an area of a left-hand B column of the motor vehicle, wherein a second coil arrangement of the at least two coil arrangements is installed in an area of a right-hand B column of the motor vehicle, and wherein a third coil arrangement of the at least two coil arrangements is installed in the area of a rear of the motor vehicle.

15. The locating system in accordance with claim 9, wherein the at least two coil arrangements are arranged such that planes of rotation of the at least two rotating electromagnetic fields are essentially parallel to one another, and/or wherein the at least two coil arrangements are installed in an area of 70 cm to 130 cm above the ground.

8. A locating system for determining a position of an identification transmitter for a motor vehicle, the locating system comprising:

at least two coils that are mounted location-fast at different locations of the motor vehicle and are each set up to be operated as transmitters for an electromagnetic field, each of the at least two coils being coupled to a power supply line;

an identification transmitter having a receiver coil, the identification transmitter configured to be operated as a receiver for the at least two electromagnetic fields; and

a control device configured to actuate the at least two coils via a computer unit via a bus system with a pre-specified sequence for generating the electromagnetic field.