DATA TRANSMISSION SYSTEM

• US 20110294427A1
• Filed: 05/16/2011
• Published: 12/01/2011
• Est. Priority Date: 05/27/2010
• Status: Active Grant

• Current Assignee: Rolls-Royce PLC (Rolls-Royce Holdings Plc)
• Original Assignee: Rolls-Royce PLC (Rolls-Royce Holdings Plc)
• Inventors: GARNER, STEPHEN GRANVILLE
• Granted Patent: US 8,406,690 B2
• Time in Patent Office: Days
• US Class Current: 455/41.2
• CPC Class Codes: F01D 17/02 Arrangement of sensing elements
• CPC Class Codes: H04Q 2209/845 where the measuring is synchronized between sensing devices
• 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
• CPC Class Codes: Y02T 50/60 Efficient propulsion technologies, e.g. for aircraft

Abstract

A system is provided for transmitting data between a first component and a second component, which rotates relative to the first component. The system includes a first coupling element of limited angular extent mounted to the first component, and a second coupling element of limited angular extent mounted to the second component. The first and second coupling elements come into angular alignment once per revolution of the second component relative to the first component. The system further includes a first transceiver connected to the first coupling element, and a second transceiver connected to the second coupling element. The first and second transceivers are configured to detect the angular alignment of the first and second coupling elements. The first and second transceivers are further configured to transmit data between the first and second transceivers via the first and second coupling elements when the angular alignment is detected.

Claims

1. A system for transmitting data between a first component (30) and a second component (31) which rotates relative to the first component, the system comprising:

a first coupling element (32) of limited angular extent mounted to the first component, and a second coupling element (33) of limited angular extent mounted to the second component, the first and second coupling elements coming into angular alignment once per revolution of the second component relative to the first component, and

a first transceiver (34) connected to the first coupling element, and a second transceiver (35) connected to the second coupling element, wherein at least one of the first and second transceivers is configured to detect the angular alignment of the first and second coupling elements, and are further configured to transmit data between the first and second transceivers via the first and second coupling elements when the angular alignment is detected; and

wherein one of the transceivers is a master transceiver and the other is a slave transceiver, the master transceiver repeatedly driving its respective coupling element with a call signal, and the slave transceiver monitoring its respective coupling element for receipt of the call signal, whereby data is transmitted between the transceivers after the slave transceiver receives the call signal.

2. A system according to claim 1, wherein the first and second coupling elements are inductive elements which magnetically couple with each other when angularly aligned.

3. A system according to claim 1, wherein the first and second transceivers are electrically connected to respectively the first and second coupling elements.

4. A system according to claim 1, wherein the first and second transceivers comprise respective memory elements for temporary storage of data pending transmission of the data from one transceiver to the other via the coupling elements when the angular alignment is detected.

5. A system according to claim 1, wherein the master transceiver drives its respective coupling element after each repeat of the call signal with master data, whereby, after the slave transceiver receives the call signal, the slave transceiver receives the master data.

6. A system according to claim 1, wherein the master transceiver drives its respective coupling element after each repeat of the call signal with a timing signal indicating when the slave transceiver can transmit data to the master transceiver, whereby the slave transceiver drives its respective coupling element with slave data at the time indicated by the timing signal, and the slave data is received by the master transceiver.

7. A system according to claim 1 which further comprises:

one or more additional first coupling elements of limited angular extent mounted to the first component, and respective additional second coupling elements of limited angular extent mounted to the second component, each pair of an additional first angular element and a corresponding second additional angular element coming into angular alignment once per revolution of the second component relative to the first component,

wherein the first transceiver is also connected to the additional first coupling elements, and the second transceiver is also connected to the additional second coupling elements, wherein at least one of the first and second transceivers is configured to detect the respective angular alignments of the pairs of first and second additional coupling elements, and are further configured to transmit data between the first and second transceivers via the first and second additional coupling elements when the angular alignments are detected.

8. A system according to claim 1 which is also for transmitting data between the second component and a third component (40) which rotates relative to the second component, the system further comprising:

a third coupling element (43) of limited angular extent mounted to the third component, and a fourth coupling element (42) of limited angular extent mounted to the second component, the third and fourth angular elements coming into angular alignment once per revolution of the third component relative to the second component, and

a third transceiver (44) connected to the third coupling element, wherein the second transceiver is also connected to the fourth coupling element, and the third and second transceivers are configured to detect the angular alignment of the third and fourth coupling elements, and the third and second transceivers are further configured to transmit data between the third and second transceivers via the third and fourth coupling elements when the angular alignment of the third and fourth coupling elements is detected.

9. A rotating machine having a first component and a second component which rotates relative to the first component, the machine further comprising a system according to claim 1 for transmitting data between the first component and the second component.

10. A rotating machine having a first component, a second component which rotates relative to the first component, and a third component which rotates relative to the second component, the machine further comprising a first system according to claim 8 for transmitting data between the first component and the second component, and for transmitting data between the second component and the third component.

11. A rotating machine according to claim 9 wherein the rotating machine comprises a gas turbine engine.

12. A rotating machine according to claim 10 wherein the rotating machine comprises a gas turbine engine.