DEVICE FOR THE WIRELESS TRANSMISSION OF SIGNALS BETWEEN TWO PARTS OF A PROCESSING MACHINE

• US 20090280743A1
• Filed: 03/09/2009
• Published: 11/12/2009
• Est. Priority Date: 05/10/2008
• Status: Abandoned Application

• Current Assignee: OTT-JAKOB Spanntechnik GmbH
• Original Assignee: OTT-JAKOB Spanntechnik GmbH
• Inventors: Fuhrmann, Markus, Horger, Winfried, Bonerz, Stefan, Gast, Stephan, Greif, Josef
• Application Number:
  US12/400,498
• Publication Number:
  US 20090280743A1
• Time in Patent Office: Days
• US Class Current: 455/41.200
• CPC Class Codes: B23Q 1/0027 between moving parts between which an uninterrupted energy-transfer connection is maintained
• CPC Class Codes: B23Q 17/00 Arrangements for observing, indicating or measuring on machine tools for automatic control or regulation of feed movement, cutting velocity or position of tool or work B23Q15/00
• CPC Class Codes: H01F 2038/143 for signals
• CPC Class Codes: H01F 38/18 Rotary transformers
• CPC Class Codes: H04B 7/0682 using phase diversity (e.g. phase sweeping)

Abstract

In a device for wireless transmission of signals between two parts (17, 23) of a processing machine, wherein, when the processing machine is operating, one of these parts rotates relative to the other part about an axis (18), several antennas (8A, 8B, 8C; 108A, 108B, 108C; 13A, 13B, 13C) are arranged on at least one of the two parts (17, 23) in an at least approximately regular distribution with respect to the peripheral direction of rotation. The antennas (8A, 8B, 8C; 108A, 108B, 108C; 13A, 13B, 13C) are connected in parallel to a transmit device (7) and/or receive device (12) allocated to each part (17, 23). The lengths of the individual antennas (8A, 8B, 8C) overlap in the peripheral direction of rotation, and the antennas are arranged at least partially offset radially and/or in the longitudinal direction of the rotational axis (18). Phase-shifted signals are fed to the individual antennas (108A, 108B, 108C) by the transmit device, and/or signals received by the antennas (13A, 13B, 13C) are superimposed with a phase shift by the receive device.

Claims

1. Device for wireless transmission of signals between two parts of a processing machine, wherein, when the processing machine is operating, one of these parts rotates relative to the other about an axis, and wherein several antennas are arranged on at least one of the two parts in an at least approximately regular distribution with respect to the peripheral direction of the rotation, and that the antennas are connected in parallel to a transmit device and/or receive device allocated to each part.

2. Device according to claim 1, wherein several antennas are arranged on the two parts of the processing machine at an at least approximately regular distribution with respect to the peripheral direction of rotation.

3. Device according to claim 1, wherein the individual antennas arranged on the same part of the processing machine have the same shape relative to each other and are offset in the peripheral direction by an angle that equals at least approximately 360°

divided by the number of antennas.

4. Device according to claim 1, wherein the lengths of the individual antennas overlap in the peripheral direction of rotation and the individual antennas are arranged at least partially offset with respect to each other radially and/or in the longitudinal direction of the rotational axis.

5. Device according to claim 1, wherein in-phase signals are fed from the transmit device to the individual antennas, and signals received from the individual antennas are superimposed in-phase with each other by the receive device.

6. Device according to claim 1, wherein phase-shifted signals are fed by the transmit device to the individual antennas, and/or signals received by the individual antennas are superimposed phase-shifted with each other by the receive device.

7. Device according to claim 6, wherein the phase shift is at least approximately 360°

divided by the number of antennas.

8. Device according to claim 2, wherein the individual antennas arranged on the same part of the processing machine have the same shape relative to each other and are offset in the peripheral direction by an angle that equals at least approximately 360°

divided by the number of antennas.

9. Device according to claim 2, wherein the lengths of the individual antennas overlap in the peripheral direction of rotation and the individual antennas are arranged at least partially offset with respect to each other radially and/or in the longitudinal direction of the rotational axis.

10. Device according to claim 2, wherein in-phase signals are fed from the transmit device to the individual antennas, and signals received from the individual antennas are superimposed in-phase with each other by the receive device.

11. Device according to claim 2, wherein phase-shifted signals are fed by the transmit device to the individual antennas, and/or signals received by the individual antennas are superimposed phase-shifted with each other by the receive device.

12. Device according to claim 11, wherein the phase shift is at least approximately 360°

divided by the number of antennas.

13. Device according to claim 3, wherein the lengths of the individual antennas overlap in the peripheral direction of rotation and the individual antennas are arranged at least partially offset with respect to each other radially and/or in the longitudinal direction of the rotational axis.

14. Device according to claim 3, wherein in-phase signals are fed from the transmit device to the individual antennas, and signals received from the individual antennas are superimposed in-phase with each other by the receive device.

15. Device according to claim 3, wherein phase-shifted signals are fed by the transmit device to the individual antennas, and/or signals received by the individual antennas are superimposed phase-shifted with each other by the receive device.

16. Device according to claim 15, wherein the phase shift is at least approximately 360°

divided by the number of antennas.