Data transmission system for wireless communication

• US 20060192671A1
• Filed: 02/24/2006
• Published: 08/31/2006
• Est. Priority Date: 02/24/2005
• Status: Active Grant

• Current Assignee: VEGA Grieshaber KG (Grieshaber Verwaltungsgesellschaft mbH)
• Original Assignee: VEGA Grieshaber KG (Grieshaber Verwaltungsgesellschaft mbH)
• Inventors: Isenmann, Andreas, Faist, Fridolin, Schaetzle, Ralf
• Granted Patent: US 7,962,100 B2
• Time in Patent Office: Days
• US Class Current: 340/531
• CPC Class Codes: G05B 19/042 using digital processors G05B19/05 takes precedence
• CPC Class Codes: G05B 2219/25186 Bluetooth
• CPC Class Codes: G05B 2219/25196 Radio link, transponder
• CPC Class Codes: G05B 2219/25428 Field device
• CPC Class Codes: G08C 17/02 using a radio link
• CPC Class Codes: G08C 19/02 in which the signal transmitted is magnitude of current or voltage G08C19/36, G08C19/38 take precedence

Abstract

This invention relates to a data transmission system for wireless communication of a control device with a field unit via a radio transmission device. The communication between control device and radio transmission device takes place via a field bus protocol. Likewise, the communication of the field unit with the radio transmission device takes place via a field bus protocol. The radio transmission device is capable of transmitting the field bus protocol by a radio protocol.

Claims

1. Data transmission system for wireless communication, the data transmission system comprising:

a control device;

a field unit;

a radio transmission device;

wherein the control device is adapted to communicate with the radio transmission device via a field bus protocol;

wherein the field unit is adapted to communicate with the radio transmission device via the field bus protocol;

wherein the radio transmission device is adapted to transmit the field bus protocol by a radio protocol.

2. Data transmission system according to claim 1,

wherein the field bus protocol is a protocol, selected from the group of the field bus protocols consisting of HART®

, Profibus and Fieldbus Foundation.

3. Data transmission system according to claim 2,

wherein a timeout behavior of the HART®

protocol in the control device is adapted to a radio signal transmission.

4. Data transmission system according to claim 1,

wherein the radio protocol is a protocol, selected from the group of the radio protocols the group consisting of WLAN, Bluetooth and Zigbee.

5. Data transmission system according to claim 1,

wherein the radio transmission device is adapted to transmit an analog signal to the control device.

6. Data transmission system according to claim 5,

wherein the analog signal is a 4 . . . 20 mA signal.

7. Data transmission system according to claim 1,

wherein the radio transmission device is adapted to transmit a switch signal to the control device.

8. Data transmission system according to claim 1, the radio transmission device further comprising:

a memory device;

wherein the memory device is adapted to store information provided by the field unit; and

wherein the memory device is adapted to provide on demand the control device with the stored information.

9. Data transmission system according to claim 2,

wherein the control device is adapted as a HART®

master.

10. Data transmission system according to claim 2,

wherein the field unit is adapted as a HART®

slave.

11. Data transmission system according to claim 1,

wherein the field unit is adapted as a sensor selected from the group consisting of a filling level sensor, a pressure sensor and a limit sensor.

12. Data transmission system according to claim 1,

wherein the control device is adapted to make a new request in response to a self-request at the earliest after 75 ms.

13. Data transmission system according to claim 1,

wherein the control device is adapted to make a new request in response to an outside request within a range from 20 ms to 75 ms.

14. Control device for wireless communication with a field unit, the control device comprising:

a field bus conversion device;

a timeout adaptation device;

wherein the field bus conversion device is adapted to convert a control signal into a field bus signal;

wherein the timeout adaptation device is adapted to set a timing behavior of the field bus conversion device.

15. Control device according to claim 14,

wherein the timeout adaptation device is adapted to adapt the timing behavior of the field bus conversion device to radio signal transmission.

16. Control device according to claim 14,

wherein the field bus conversion device is adapted to provide a field bus signal according to a specification selected from the group of specifications the group consisting of HART®

, Profibus and Fieldbus Foundation.

17. Control device according to claim 16,

wherein the control device is adapted as a HART®

master.

18. Control device according to claim 14,

wherein the control device is adapted to make a new request in response to an own request at the earliest after 75 ms.

19. Control device according to claim 14,

wherein the control device is adapted to make a new request in response to an outside request within a range from 20 ms to 75 ms.

20. Transmitting-receiving device, comprising:

a transmitting device;

a receiving device;

wherein the transmitting device is adapted to convert a field bus protocol into a radio protocol, and to send it;

wherein the receiving device is adapted to convert the radio protocol into the field bus protocol, and to receive it.

21. Transmitting-receiving device according to claim 20,

wherein the field bus protocol is a protocol selected from the group of field bus protocols the group consisting of HART®

, Profibus and Fieldbus Foundation.

22. Transmitting-receiving device according to claim 20,

wherein the radio protocol is a protocol selected from the group of radio protocols the group consisting of WLAN, Bluetooth, and Zigbee.

23. Transmitting-receiving device according to claim 20,

wherein the transmitting-receiving device is adapted to transmit an analog signal.

24. Transmitting-receiving device according to claim 23, wherein the analog signal is a 4 . . . 20 mA signal.

25. Transmitting-receiving device according to claim 20,

wherein the transmitting-receiving device is adapted to transmit a switch signal.

26. Transmitting-receiving device according to claim 20, the transmitting-receiving device further comprising:

a memory device;

wherein the memory device is configured to store field bus protocol information; and

wherein the memory device is configured to provide the stored information on demand.

27. Method for wireless communication in a data transmission system, the data transmission system comprising:

a control device;

a field unit;

a radio transmission device;

wherein the method comprises;

communicating of the control device with the radio transmission device by a field bus protocol;

transmitting the field bus protocol by a radio protocol;

communicating of the radio transmission device with the field unit by the field bus protocol.

28. Method according to claim 27, further comprising:

adapting a timeout behavior of the control device to the radio signal transmission.

29. Method according to claim 27, further comprising:

waiting of the control device before dispatching a new request upon receipt of a response to a self-request for at least 75 ms.

30. Method according to claim 27, further comprising:

dispatching a new request of the control device to an outside request within a range from 20 ms to 75 ms.