Vibratory pipeline diagnostic system and method

• US 8,296,083 B2
• Filed: 02/22/2007
• Issued: 10/23/2012
• Est. Priority Date: 02/22/2007
• Status: Active Grant

• Current Assignee: Micro Motion Incorporated (Emerson Electric Company)
• Original Assignee: Micro Motion Incorporated (Emerson Electric Company)
• Inventors: Martin, John D
• Primary Examiner(s): Tsai, Carol
• Application Number:
  US12/526,103
• Publication Number:
  US 20100324839A1
• Time in Patent Office: 2,070 Days
• Field of Search: 702/51, 702/54, 702/56, 736/49, 731/525.8, 73/40, 73/405.A, 73/405.R, 735/92, 340/605, 340/683, 340/606
• US Class Current: 702/56
• CPC Class Codes: G01M 3/243 for pipes
• CPC Class Codes: G01N 2291/102 one emitter, one receiver
• CPC Class Codes: G01N 2291/2634 cylindrical from outside
• CPC Class Codes: G01N 29/043 in the interior, e.g. by shear waves
• CPC Class Codes: G01N 29/4427 with stored values, e.g. threshold values

Abstract

A vibratory pipeline diagnostic system (100) is provided. The system (100) comprises at least one vibration generator (104) adapted to be affixed to a pipeline, at least one vibration sensor (107) adapted to be affixed to the pipeline, and a processing device (111) in communication with the at least one vibration generator (104) and the at least one vibration sensor (107). The processing device (111) is configured to vibrate a portion of the pipeline using the at least one vibration generator (104), receive a vibrational response to the vibration from the at least one vibration sensor (107), compare the vibrational response to one or more previous vibrational responses of the pipeline, and indicate a fault condition if the vibrational response differs from the one or more previous vibrational responses by more than a predetermined tolerance.

Claims

1. A vibratory pipeline diagnostic system (100), characterized by:

at least one vibration generator (104) adapted to be affixed to a pipeline;

at least one vibration sensor (107) adapted to be affixed to the pipeline; and

a processing device (111) in communication with the at least one vibration generator (104) and the at least one vibration sensor (107), with the processing device (111) being configured to vibrate a portion of the pipeline using the at least one vibration generator (104), receive a vibrational response to the vibration from the at least one vibration sensor (107), compare the vibrational response to one or more previous vibrational responses of the pipeline, and indicate a fault condition if the vibrational response differs from the one or more previous vibrational responses by more than a predetermined tolerance.

2. The system (100) of claim 1, wherein the fault condition is related to a change in a wall thickness of the portion of the pipeline.

3. The system (100) of claim 1, wherein the fault condition is related to a change in a wall structural integrity of the portion of the pipeline.

4. The system (100) of claim 1, wherein the processing device (111) is configured to store the vibrational response.

5. The system (100) of claim 1, wherein the processing device (111) is configured to transfer the vibrational response.

6. The system (100) of claim 1, wherein the at least one vibration generator (104) and the at least one vibration sensor (107) are adapted to be removably affixed to the pipeline.

7. The system (100) of claim 1, with the processing device (111) being further configured to determine a resonant frequency of the portion of the pipeline from the vibrational response, compare the resonant frequency to one or more previous resonant frequencies of the pipeline, and indicate the fault condition if a difference between the resonant frequency and the one or more previous resonant frequencies exceeds a predetermined frequency tolerance.

8. The system (100) of claim 1, with the system (100) being configured to repeat the vibrating, receiving, and comparing at predetermined time intervals.

9. A vibratory diagnostic method for a pipeline, the method characterized by:

vibrating a portion of the pipeline;

receiving a vibrational response to the vibration;

comparing the vibrational response to one or more previous vibrational responses of the pipeline; and

indicating a fault condition if the vibrational response differs from the one or more previous vibrational responses by more than a predetermined tolerance.

10. The method of claim 9, further comprising repeating the vibrating, receiving, and comparing at predetermined time intervals.

11. The method of claim 9, wherein the fault condition is related to a change in a wall thickness of the portion of the pipeline.

12. The method of claim 9, wherein the fault condition related to a change in a wall structural integrity of the portion of the pipeline.

13. The method of claim 9, further comprising storing the vibrational response.

14. The method of claim 9, further comprising transferring the vibrational response.

15. The method of claim 9, with the analyzing comprising:

determining a resonant frequency of the portion of the pipeline from the vibrational response;

comparing the resonant frequency to one or more previous resonant frequencies of the pipeline; and

indicating a fault condition if the resonant frequency differs from the one or more previous resonant frequencies by more than a predetermined frequency tolerance.

16. A vibratory diagnostic method for a pipeline, the method characterized by:

vibrating a portion of the pipeline;

receiving a vibrational response to the vibration;

determining a resonant frequency of the portion of the pipeline from the vibrational response;

comparing the resonant frequency to one or more previous resonant frequencies of the pipeline; and

indicating a fault condition if the resonant frequency differs from the one or more previous resonant frequencies by more than a predetermined frequency tolerance.

17. The method of claim 16, further comprising repeating the vibrating, receiving, and comparing at predetermined time intervals.

18. The method of claim 16, wherein the fault condition is related to a change in a wall thickness of the portion of the pipeline.

19. The method of claim 16, wherein the fault condition is related to a change in a wall structural integrity of the portion of the pipeline.

20. The method of claim 16, further comprising storing the resonant frequency.

21. The method of claim 16, further comprising transferring the resonant frequency.