DATA ACQUISITION SYSTEM FOR SYSTEM MONITORING

• US 20070043533A1
• Filed: 08/17/2005
• Published: 02/22/2007
• Est. Priority Date: 08/17/2005
• Status: Active Grant

• Current Assignee: Xtek Incorporated (XTECH Industries Incorporated)
• Original Assignee: Xtek Incorporated (XTECH Industries Incorporated)
• Inventors: Ivers, Victor, Cox, Sarah, Wiles, Jeffrey, O'Cull, Larry
• Granted Patent: US 7,328,130 B2
• Time in Patent Office: Days
• US Class Current: 702/183
• CPC Class Codes: G01M 13/025 Test-benches with rotational drive means and loading means; Load or drive simulation
• CPC Class Codes: G01M 13/028 Acoustic or vibration analysis
• CPC Class Codes: G05B 23/0221 Preprocessing measurements, e.g. data collection rate adjustment; Standardization of measurements; Time series or signal analysis, e.g. frequency analysis or wavelets; Trustworthiness of measurements; Indexes therefor; Measurements using easily measured parameters to estimate parameters difficult to measure; Virtual sensor creation; De-noising; Sensor fusion; Unconventional preprocessing inherently present in specific fault detection methods like PCA-based methods
• CPC Class Codes: G07C 3/00 Registering or indicating the condition or the working of machines or other apparatus, other than vehicles

Abstract

A method and monitoring system for tracking operational parameters of a drive train of a monitored system includes a sensor unit affixed to the drive train. The sensor unit includes a sensor for generating an analog signal in response to an operating condition of the monitored system and an integrated local processor for processing the analog signal generated by the sensor.

Claims

1. A method of tracking operational parameters of a rolling mill system including a rotatable work roll driven by a drive motor operatively coupled with the work roll via a drive arrangement including a geared coupling, the method comprising:

providing a first sensor unit on the drive motor, the first sensor unit including both a sensor for generating an analog signal in response to an operating condition of the drive motor and an integrated local processor for processing the analog signal generated by the sensor, the integrated local processor having an associated timer;

processing the analog signal generated by the sensor of the first sensor unit during operation of the drive motor using the integrated local processor of the first sensor unit to produce a first plurality of digital signal samples having at least one corresponding time stamp associated therewith;

communicating the first plurality of digital signal samples from the first sensor unit to a remote processing unit located away from the first sensor unit;

providing a second sensor unit on the geared coupling, the second sensor unit including both a sensor for generating an analog signal in response to an operating condition of the geared coupling and an integrated local processor for processing the analog signal generated by the sensor of the second sensor unit, the integrated local processor having an associated timer;

processing the analog signal generated by the sensor of the second sensor unit during operation of the geared coupling using the integrated local processor of the second sensor unit to produce a second plurality of digital signal samples having at least one corresponding time stamp associated therewith;

communicating the second plurality of digital signal samples from the second sensor unit to the remote processing unit, where the remote processing unit is located away from the second sensor unit.

2. The method of claim 1 wherein the remote processing unit synchronizes the first plurality of digital signal samples with the second plurality of digital signal samples based at least in part upon time stamp data associated with said samples.

3. The method of claim 1 wherein the second sensor unit rotates with the geared coupling and includes an RF transmitter for communicating the second plurality of digital data samples to the processing unit at least in part via RF communication signals, the remote processing unit includes an associated RF receiver.

4. The method of claim 3 wherein the RF receiver includes an associated omni-directional antenna.

5. The method of claim 1 wherein the rolling mill system is located in a factory building, the first sensor unit, second sensor unit and remote processing unit are located within the factory building, the remote processing unit assigns a date and time to the first plurality of digital signal samples and forwards them on via a global computer network to a remote data storage center that is located away from the factory building, the remote processing unit assigns a date and time to the second plurality of digital signal samples and forwards them on via the global computer network to the remote data storage center.

6. The method of claim 2 including the further step of providing remote access to operating data derived from the synchronized first plurality of digital signal records and second plurality of digital signal records via a web site.

7. The method of claim 1 wherein

the step of processing the analog signal generated by the sensor of the first sensor unit during operation of the drive motor using the integrated local processor of the first sensor unit includes sampling the analog signal at a first fixed sampling rate and collecting digital signal samples at a first reporting rate that can be varied via a first control signal received by the first sensor unit;

and

the step of processing the analog signal generated by the sensor of the second sensor unit during operation of the geared coupling using the integrated local processor of the second sensor unit includes sampling the analog signal generated by the sensor of the second sensor unit at a second fixed sampling rate and collecting digital signal samples at a second reporting rate that can be varied via a second control signal received by the second sensor unit.

8. The method of claim 7 wherein at least one of the first and second reporting rates is changed automatically based on rotational speed of an associated data acquiring location.

9. The method of claim 1 wherein the first plurality of digital signal samples are packaged together with a first corresponding reporting rate value and a first corresponding single timestamp value for a single one of the first plurality of digital signal samples, wherein the second plurality of digital signal samples are packaged together with a second corresponding reporting rate value and a second corresponding single timestamp value for a single one of the second plurality of digital signal samples.

10. The method of claim 9 including the downstream step of remotely determining a corresponding timestamp for each of the first plurality of digital signal samples based upon the first corresponding reporting rate value and the first corresponding single timestamp value, and remotely determining a corresponding timestamp for each of the second plurality of digital signal samples based upon the second corresponding reporting rate value and the second corresponding single timestamp value.

11. The method of claim 1 further including the step of comparing a data value from the analog signal generated by the sensor of the first sensor unit to a threshold data value using the integrated local processor of the first sensor unit.

12. A data acquisition system for tracking operational parameters of a rolling mill system including a rotatable work roll driven by a drive motor operatively coupled with the work roll via a drive arrangement including a geared coupling, the data acquisition system comprising:

a first sensor unit mounted locally on the drive motor, the first sensor unit including both a sensor that generates an analog signal in response to an operating condition of the drive motor and an integrated local processor that processes the analog signal generated by the sensor during operation of the first sensor unit to produce a first plurality of digital signal samples; and

a second sensor unit mounted locally on the geared coupling, the second sensor unit including both a sensor that generates an analog signal in response to an operating condition of the geared coupling and an integrated local processor that processes the analog signal generated by the sensor of the second sensor unit during operation of the second sensor unit to produce a second plurality of digital signal samples; and

a remote data storage center that receives and stores data from the first plurality of digital signal samples and the second plurality of digital signal samples.

13. The data acquisition system of claim 12 wherein the integrated local processor of the first sensor unit and the sensor of the first sensor unit are located on a first common circuit board housed by the first sensor unit.

14. The data acquisition system of claim 13 wherein the integrated local processor of the second sensor unit and the sensor of the second sensor unit are located on a second common circuit board housed by the second sensor unit.

15. The data acquisition system of claim 12 further comprising a first communicator located remotely from and in communication with the first sensor unit, the first communicator including a processor for processing the first plurality of digital signal samples.

16. The data acquisition system of claim 15 wherein the first sensor unit and the first communicator communicate wirelessly.

17. The data acquisition system of claim 16 wherein the first sensor unit rotates with the geared coupling and includes an RF transmitter that communicates the first plurality of digital signal samples to the first communicator at least in part via RF communication signals and the first communicator includes an RF receiver.

18. The data acquisition system of claim 17 wherein the RF receiver includes an associated omni-directional antenna.

19. The data acquisition system of claim 16 wherein the first sensor unit includes a local power source.

20. The data acquisition system of claim 15 further comprising a second communicator located remotely from and in communication with the second sensor unit using a wired connection, the second communicator including a processor for processing the second plurality of digital signal samples.

21. The data acquisition system of claim 20 wherein the second communicator supplies power to the second sensor unit using the wired connection.

22. The data acquisition system of claim 20 further comprising a gateway including a processor for assigning a date and time value to the first plurality of digital signal samples and for assigning a date and time value to the second plurality of digital signal samples.

23. The data acquisition system of claim 22 wherein the rolling mill system is located in a factory building, the first sensor unit, second sensor unit first communicator, second communicator and gateway are located on-site in the factory building, and the first plurality of digital signal samples and second plurality of digital signal samples are communicated from the gateway via a global computer network to the remote data storage center that is located off-site, away from the factory building.

24. A method of tracking operational parameters of a system including a member driven by a drive motor operatively coupled with the member via a drive arrangement including a geared coupling, the method comprising:

providing a first sensor unit on the drive motor, the first sensor unit including both a sensor for generating an analog signal in response to an operating condition of the drive motor and an integrated local processor for processing the analog signal generated by the sensor, the integrated local processor having an associated timer;

processing the analog signal generated by the sensor of the first sensor unit during operation of the drive motor using the integrated local processor of the first sensor unit to produce a first plurality of digital signal samples having at least one corresponding time stamp associated therewith;

communicating the first plurality of digital signal samples from the first sensor unit to a remote processing unit located away from the first sensor unit;

providing a second sensor unit on the geared coupling, the second sensor unit including both a sensor for generating an analog signal in response to an operating condition of the geared coupling and an integrated local processor for processing the analog signal generated by the sensor of the second sensor unit, the integrated local processor having an associated timer;

processing the analog signal generated by the sensor of the second sensor unit during operation of the geared coupling using the integrated local processor of the second sensor unit to produce a second plurality of digital signal samples having at least one corresponding time stamp associated therewith;

communicating the second plurality of digital signal samples from the second sensor unit to the remote processing unit, where the remote processing unit is located away from the second sensor unit.

25. The method of claim 24 wherein the remote processing unit synchronizes the first plurality of digital signal samples with the second plurality of digital signal samples based at least in part upon time stamp data associated with said samples.

26. The method of claim 24 wherein the rolling mill system is located in a factory building, the first sensor unit, second sensor unit and remote processing unit are located within the factory building, the remote processing unit assigns a date and time to the first plurality of digital signal samples and forwards them on via a global computer network to a remote data storage center that is located away from the factory building, the remote processing unit assigns a date and time to the second plurality of digital signal samples and forwards them on via the global computer network to the remote data storage center.

27. The method of claim 26 wherein the first plurality of digital signal records and the second plurality of digital signal records are synchronized at the remote data storage center or at another processing location based upon the date and time data and the timestamp data.

28. A method of tracking operational parameters of a system including a member driven by a drive motor operatively coupled with the member via a drive arrangement including a geared coupling, the method comprising:

providing a sensor unit on one of the drive motor and the geared coupling, the sensor unit including both a sensor for generating an analog signal in response to an operating condition of the drive motor and an integrated local processor for processing the analog signal generated by the sensor, the integrated local processor having an associated timer;

processing the analog signal generated by the sensor using the integrated local processor to (i) produce a first plurality of digital signal samples and (ii) package the first plurality of digital signal sample together as a packet for transmission, the packet including an associated timestamp value for a single one of the digital signal samples and an associated reporting rate value from which a relative timing of the other digital signal samples can be determined; and

storing data from the first plurality of digital signal samples in a database for enabling selective retrieval at a later time.

29. A data acquisition system for tracking operational parameters of a rolling mill system including a rotatable work roll driven by a drive motor operatively coupled with the work roll via a drive arrangement including a geared coupling, the data acquisition system comprising:

a first sensor unit mounted locally on the drive motor, the first sensor unit including both a sensor that generates an analog signal in response to an operating condition of the drive motor and an integrated local processor that processes the analog signal generated by the sensor during operation of the first sensor unit to produce a first plurality of digital signal samples; and

a second sensor unit mounted locally on the geared coupling, the second sensor unit including both a sensor that generates an analog signal in response to an operating condition of the geared coupling and an integrated local processor that processes the analog signal generated by the sensor of the second sensor unit during operation of the second sensor unit to produce a second plurality of digital signal samples; and

at least one other processing unit in operative communication with the first sensor unit and the second sensor unit, the at least one other processing unit analyzes data from the first sensor unit and second sensor unit and operates to produce alarm notifications based upon such analysis.

30. The system of claim 29 wherein the alarm notifications are sent by one or more of e-mail, pager or phone.

31. A method of tracking operational parameters of a system including a member driven by a drive motor operatively coupled with the member via a drive arrangement including a geared coupling, the method comprising:

providing a sensor unit on one of the drive motor and the geared coupling, the sensor unit including both a sensor for generating an analog signal in response to an operating condition of the drive motor and an integrated local processor for processing the analog signal generated by the sensor, the integrated local processor having an associated timer;

processing the analog signal generated by the sensor using the integrated local processor to (i) produce a first plurality of digital signal samples and (ii) package the first plurality of digital signal sample together as a packet for transmission, the packet including an associated timestamp value for a single one of the digital signal samples and an associated reporting rate value from which a relative timing of the other digital signal samples can be determined; and

providing at least one other processing unit in operative communication with the sensor unit, the at least one other processing unit analyzes data from the sensor unit and operates to produce alarm notifications based upon such analysis.

32. The system of claim 31 wherein the alarm notifications are sent by one or more of e-mail, pager or phone.