Nip press sensing system including a sensor strip having sensor interface electronics associated therewith and methods of operating the same

• US 7,305,894 B2
• Filed: 05/13/2005
• Issued: 12/11/2007
• Est. Priority Date: 05/14/2004
• Status: Active Grant

• Current Assignee: Stowe Woodward LLC (Andritz AG)
• Original Assignee: Stowe Woodward LLC (Andritz AG)
• Inventors: Moore, Robert Hunter, Murphy, David
• Primary Examiner(s): Lefkowitz; Edward
• Assistant Examiner(s): Kirkland, III; Freddie
• Application Number:
  US11/128,642
• Publication Number:
  US 20060020418A1
• Time in Patent Office: 942 Days
• Field of Search: 731/58, 731/59, 731/60, 738/625.5
• US Class Current: 73/862.55
• CPC Class Codes: B41F 13/24 Cylinder-tripping devices; Cylinder-impression adjustments
• CPC Class Codes: D21F 3/06 Means for regulating the pressure
• CPC Class Codes: G01L 5/0085 Force sensors adapted for insertion between cooperating machine elements, e.g. for measuring the nip force between rollers

Abstract

According to some embodiments of the present invention, a system for determining characteristics of two rolls configured in a nip press includes a strip configured to be placed in the nip press. A plurality of sensors embedded in the strip is configured to generate signals representative of the pressure and/or the nip width between the two rolls. Interface circuitry facilitates addressing of individual ones of the plurality of sensors via a data processing system.

Claims

1. A system for determining characteristics of two rolls configured in a nip press, comprising:

a strip configured to be placed in the nip press;

a plurality of sensors embedded in the strip that is configured to generate signals representative of the pressure and/or the nip width between the two rolls, the plurality of sensors being configured in a plurality of sensor banks;

interface circuitry that facilitates addressing of individual ones of the plurality of sensors via a data processing system, the interface circuitry comprising a plurality of multiplexer circuits respectively coupled to the plurality of sensor banks, each of the multiplexer circuits being responsive to a sensor address to select an output signal of one sensor contained on the respective sensor bank coupled thereto; and

a plurality of processors respectively coupled to the plurality of multiplexer circuits that is responsive to a multiplexer selection address to selectively enable one of the plurality of multiplexer circuits;

wherein the plurality of sensors embedded in the strip that are configured to generate signals provide a substantially continuous representation of the pressure and/or the nip width along a length of the two rolls.

2. The system of claim 1, wherein the interface circuitry is embedded in the strip.

3. The system of claim 1, wherein the interface circuitry is attached to the strip.

4. The system of claim 1, further comprising:

a bank selection circuit that is coupled to the plurality of multiptexer circuits and is responsive to a multiplexer selection address to selectively enable one of the plurality of multiplexer circuits.

5. The system of claim 1, further comprising:

a data processing system configured to process the signals and calculate values representative of the signals.

6. The system of claim 5, further comprising:

a display coupled to the data processing system that is configured to provide a visual representation of the values.

7. The system of claim 5, wherein the data processing system is configured to calculate measurements of nip width based on the signals.

8. The system of claim 7, wherein the data processing system is configured to calculate measurements of nip width based on the signals at predetermined times.

9. The system of claim 5, further comprising:

a wireless transmitter that is configured to communicate the signals to the data processing system.

10. The system of claim 9, wherein the plurality of sensors is configured in a plurality of sensor banks, the system further comprising:

a plurality of wireless transmitters associated with the plurality of sensor banks, respectively.

11. The system of claim 1, further comprising:

a control system that is communicatively coupled to the plurality of sensors and is configured to initiate corrective measures for the nip press responsive to the signals.

12. The system of claim 1, further comprising:

at least one temperature sensor associated with the plurality of sensors.

13. A system for determining characteristics of two rolls configured in a nip press, comprising:

a strip configured to be placed in the nip press;

a plurality of sensors embedded in the strip that is configured to generate signals representative of the pressure and/or the nip width between the two rolls, the plurality of sensors being configured in a plurality of sensor banks;

interface circuitry that facilitates addressing of individual ones of the plurality of sensors via a data processing system, the interface circuitry comprising a plurality of multiplexer circuits respectively coupled to the plurality of sensor banks, each of the multiplexer circuits being responsive to a sensor address to select an output signal of one sensor contained on the respective sensor bank coupled thereto; and

a plurality of processors respectively coupled to the plurality of multiplexer circuits that is responsive to a multiplexer selection address to enable the plurality of multiplexer circuits in parallel;

wherein the plurality of sensors embedded in the strip that are configured to generate signals provide a substantially continuous representation of the pressure and/or the nip width along a length of the two rolls.

14. The system of claim 13, wherein the interface circuitry is embedded in the strip.

15. The system of claim 13, wherein the interface circuitry is attached to the strip.

16. The system of claim 13, further comprising:

a bank selection circuit that is coupled to the plurality of multiplexer circuits and is responsive to a multiplexer selection address to selectively enable one of the plurality of multiplexer circuits.

17. The system of claim 13, further comprising:

a control system that is communicatively coupled to the plurality of sensors and is configured to initiate corrective measures for the nip press responsive to the signals.

18. A method for determining characteristics of two rolls configured in a nip press, comprising:

placing a strip in the nip press, the strip comprising a plurality of sensors embedded in the strip that is configured to generate signals representative of the pressure and/or the nip width between the two rolls and interface circuitry that facilitates addressing of individual ones of the plurality of sensors via a data processing system, the plurality of sensors being configured in a plurality of sensor banks and the interface circuitry comprising a plurality of multiplexer circuits respectively coupled to the plurality of sensor banks and a plurality of processors respectively coupled to the plurality of multiplexer circuits;

using the data processing system to determine characteristics of the two rolls based on the signals;

generating signals that provide a substantially continuous representation of the pressure and/or the nip width along a length of the two rolls;

enabling one of the plurality of multiplexer circuits using one of the plurality of processors responsive to a multiplexer selection address; and

selecting the output signal of one sensor contained on the sensor bank coupled to the enabled one of the plurality of multiplexer circuits responsive to a sensor address.

19. The method of claim 18, wherein the interface circuitry is embedded in the strip.

20. The method of claim 18, wherein the interface circuitry is attached to the strip.

21. The method of claim 18, wherein the plurality of sensors is configured in a plurality of sensor banks, and wherein the interface circuitry comprises a plurality of multiplexer circuits respectively coupled to the plurality of sensor bans and a bank selection circuit that is coupled to the plurality of multiplexer circuits, the method further comprising:

enabling one of the plurality of multiplexer circuits using the bank selection circuit responsive to a multiplexer selection address; and

selecting the output signal of one sensor contained on the sensor bank coupled to the enabled one of the plurality of multiplexer circuits responsive to a sensor address.

22. The method of claim 18, further comprising:

calculating values representative of the signals using a data processing system.

23. The method of claim 22, further comprising:

displaying a visual representation of the values.

24. The method of claim 22, further comprising:

calculating measurements of nip width based on the signals.

25. The method of claim 24, further comprising:

calculating measurements of nip width based on the signals at predetermined times.

26. The method of claim 22, further comprising:

wirelessly communicating the signals to the data processing system.

27. The method of claim 18, further comprising:

initiating corrective measures for the nip press responsive to the signals.

28. A method for determining characteristics of two rolls configured in a nip press, comprising:

placing a strip in the nip press, the strip comprising a plurality of sensors embedded in the strip that is configured to generate signals representative of the pressure and/or the nip width between the two rolls and interface circuitry that facilitates addressing of individual ones of the plurality of sensors via a data processing system, the plurality of sensors being configured in a plurality of sensor banks and the interface circuitry comprising a plurality of multiplexer circuits respectively coupled to the plurality of sensor banks and a plurality of processors respectively coupled to the plurality of multiplexer circuits;

using the data processing system to determine characteristics of the two rolls based on the signals;

generating signals that provide a substantially continuous representation of the pressure and/or the nip width along a length of the two rolls;

enabling the plurality of multiplexer circuits in parallel using the plurality of processors responsive to a multiplexer selection address; and

selecting the output signals of sensors contained on the sensor banks sensor addresses.

29. The method of claim 28, wherein the interface circuitry is embedded in the strip.

30. The method of claim 28, wherein the interface circuitry is attached to the strip.

31. The method of claim 28, wherein the plurality of sensors is configured in a plurality of sensor banks, and wherein the interface circuitry comprises a plurality of multiplexer circuits respectively coupled to the plurality of sensor bans and a bank selection circuit that is coupled to the plurality of multiplexer circuits, the method further comprising:

enabling one of the plurality of multiplexer circuits using the bank selection circuit responsive to a multiplexer selection address; and

selecting the output signal of one sensor contained on the sensor bank coupled to the enabled one of the plurality of multiplexer circuits responsive to a sensor address.

32. A strip for use in a nip press between two rolls, comprising:

a plurality of sensors embedded in the strip that is configured to generate signals representative of the pressure and/or the nip width between the two rolls, the plurality of sensors is configured in a plurality of sensor banks;

interface circuitry that facilitates addressing of individual ones of the plurality of sensors via a data processing system, the interface circuitry comprising a plurality of multiplexer circuits respectively coupled to the plurality of sensor banks, each of the multiplexer circuits being responsive to a sensor address to select an output signal of one sensor contained on the respective sensor bank coupled thereto; and

a plurality of processors respectively coupled to the plurality of multiplexer circuits that is responsive to a multiplexer selection address to selectively enable one of the plurality of multiplexer circuits;

wherein the plurality of sensors embedded in the strip that are configured to generate signals provide a substantially continuous representation of the pressure and/or the nip width along a length of the two rolls;

a plurality of processors respectively coupled to the plurality of multiplexer circuits that is responsive to a multiplexer selection address to selectively enable one of the plurality of multiplexer circuits.

33. The strip of claim 32, wherein the interface circuitry is embedded in the strip.

34. The strip of claim 32, wherein the interface circuitry is attached to the strip.

35. The strip of claim 32, further comprising:

a bank selection circuit that is coupled to the plurality of multiplexer circuits and is responsive to a multiplexer selection address to selectively enable one of the plurality of multiplexer circuits.