METHOD FOR DIAGNOSING AN IMPULSE LINE BLOCKAGE IN A PRESSURE TRASDUCER, AND PRESSURE TRANSDUCER

• US 20100010755A1
• Filed: 07/20/2006
• Published: 01/14/2010
• Est. Priority Date: 07/20/2006
• Status: Abandoned Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Paulitsch, Christoph
• Application Number:
  US12/309,453
• Publication Number:
  US 20100010755A1
• Time in Patent Office: Days
• US Class Current: 702/47
• CPC Class Codes: G01F 1/36 the pressure or differential pressure being created by the use of flow constriction
• CPC Class Codes: G01L 27/007 Malfunction diagnosis, i.e. diagnosing a sensor defect

Abstract

A method for the detection of diagnosis of a blockage of an impulse line in a pressure measurement transducer and a corresponding pressure measurement transducer are disclosed, in which at least one characteristic value is compared with at least one reference value for the analysis of at least one measurement signal and, depending on the result of the comparison, an action is triggered, wherein the, or every, characteristic value is produced, with the aid of at least single parameters of a model describing the transmission behavior of impulse lines with which the pressure measurement transducer is coupled to a line traversed by a fluid.

Claims

1-9. -9. (canceled)

10. A method for operating a pressure transducer which is connected to a pipe at least by a high-pressure and a low-pressure impulse line, comprising:

supplying a first measurement signal and a second measurement signal by a pressure sensor incorporated by the pressure transducer;

determining a characteristic value in relation to the first and second measurement signal by an analysis device, wherein parameters of a model describing a response of the high-pressure and the low-pressure impulse lines are determined based upon the first and second measurement signal and the characteristic value is produced based upon individual parameters;

comparing the characteristic value with a predefined reference value by the analysis device; and

initiating a predefined action depending on the result of the comparison by the analysis device.

11. The method as claimed in claim 10, wherein the pressure sensor supplies a differential pressure measurement signal as the first measurement signal and an absolute pressure measurement signal as the second measurement signal, the differential pressure measurement signal representing a difference between a pressure in the high-pressure impulse line and a pressure in the low-pressure impulse line and the absolute pressure measurement signal representing the pressure in the high- or low-pressure impulse line.

12. The method as claimed in claim 10, wherein the pressure sensor supplies a first and a second absolute pressure measurement signal as the first and second measurement signal which represent a pressure in the high-pressure impulse line and the low-pressure impulse line respectively.

13. The method as claimed in claim 12, wherein the pressure sensor supplies a differential pressure measurement signal as the first measurement signal and either the first or second absolute pressure measurement signal as the second measurement signal.

14. The method as claimed in claim 10, wherein a cutoff frequency or a damping or a gain factor is determined as the characteristic value.

15. The method as claimed in claim 11, wherein a cutoff frequency or a damping or a gain factor is determined as the characteristic value.

16. The method as claimed in claim 12, wherein a cutoff frequency or a damping or a gain factor is determined as the characteristic value.

17. The method as claimed in claim 14, wherein a plurality of characteristic values are determined, a comparison of a first characteristic value with a respective reference value enabling a conclusion to be drawn in respect of a fault in both impulse lines and a comparison of a second characteristic value with a respective reference value enabling a conclusion to be drawn in respect of a fault either in one of the two impulse lines or in both impulse lines, wherein a logical combination of both conclusions produces a conclusion concerning a fault in one of the two impulse lines.

18. A pressure transducer connected to a pipe by at least one high- and low-pressure impulse line, comprising:

a pressure sensor for delivering a first measurement signal and a second measurement signal; and

an analysis device for

determining a characteristic value relating to the first and second measurement signal, wherein parameters of a model describing a response of the high-pressure and the low-pressure impulse lines are determined by the analysis device based upon the first and second measurement signal, and wherein the characteristic value is produced based upon individual parameters,

comparing the characteristic value with a predefined reference value, and

initiating a predefined action depending on the result of the comparison.

19. The pressure transducer as claimed in claim 18, wherein the pressure sensor supplies a differential pressure measurement signal as the first measurement signal and an absolute pressure measurement signal as the second measurement signal, the differential pressure measurement signal representing a difference between a pressure in the high-pressure impulse line and a pressure in the low-pressure impulse line and the absolute pressure measurement signal representing the pressure in the high- or low-pressure impulse line.

20. The pressure transducer as claimed in claim 18, wherein the pressure sensor supplies a first and a second absolute pressure measurement signal as the first and second measurement signal which represent a pressure in the high-pressure impulse line and the low-pressure impulse line respectively.

21. The pressure transducer as claimed in claim 20, wherein the pressure sensor supplies a differential pressure measurement signal as the first measurement signal and either the first or second absolute pressure measurement signal as the second measurement signal.

22. The pressure transducer as claimed in claim 18, wherein a cutoff frequency or a damping or a gain factor is determined as the characteristic value.

23. The pressure transducer as claimed in claim 22, wherein a plurality of characteristic values are determined, a comparison of a first characteristic value with a respective reference value enabling a conclusion to be drawn in respect of a fault in both impulse lines and a comparison of a second characteristic value with a respective reference value enabling a conclusion to be drawn in respect of a fault either in one of the two impulse lines or in both impulse lines, wherein a logical combination of both conclusions produces a conclusion concerning a fault in one of the two impulse lines.

24. A computer readable medium storing a computer program with computer-executable program code instructions which, when executed on a computer system, perform a method, comprising:

supplying a first measurement signal and a second measurement signal by a pressure sensor incorporated by a pressure transducer which is connected to a pipe at least by a high-pressure and a low-pressure impulse line;

determining a characteristic value in relation to the first and second measurement signal by an analysis device, wherein parameters of a model describing a response of the high-pressure and the low-pressure impulse lines are determined based upon the first and second measurement signal and that the characteristic value is produced based upon individual parameters;

comparing the characteristic value with a predefined reference value by the analysis device; and

initiating a predefined action depending on the result of the comparison by the analysis device.

25. The computer readable medium as claimed in claim 24, wherein the pressure sensor supplies a differential pressure measurement signal as the first measurement signal and an absolute pressure measurement signal as the second measurement signal, the differential pressure measurement signal representing a difference between a pressure in the high-pressure impulse line and a pressure in the low-pressure impulse line and the absolute pressure measurement signal representing the pressure in the high- or low-pressure impulse line.

26. The computer readable medium as claimed in claim 24, wherein the pressure sensor supplies a first and a second absolute pressure measurement signal as the first and second measurement signal which represent a pressure in the high-pressure impulse line and the low-pressure impulse line respectively.

27. The computer readable medium as claimed in claim 26, wherein the pressure sensor supplies a differential pressure measurement signal as the first measurement signal and either the first or second absolute pressure measurement signal as the second measurement signal.

28. The computer readable medium as claimed in claim 24, wherein a cutoff frequency or a damping or a gain factor is determined as the characteristic value.

29. The computer readable medium as claimed in claim 28, wherein a plurality of characteristic values are determined, a comparison of a first characteristic value with a respective reference value enabling a conclusion to be drawn in respect of a fault in both impulse lines and a comparison of a second characteristic value with a respective reference value enabling a conclusion to be drawn in respect of a fault either in one of the two impulse lines or in both impulse lines, wherein a logical combination of both conclusions produces a conclusion concerning a fault in one of the two impulse lines.