Process device diagnostics using process variable sensor signal

Details Process device diagnostics using process variable sensor signal Process device diagnostics using process variable sensor signal

1999-06-25

2003-07-29

Hoff, Marc S. (Department: 2857)

Data processing: measuring, calibrating, or testing

Calibration or correction system

Sensor or transducer

C702S045000, C073S861357

Reexamination Certificate

active

06601005

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to diagnostics of process devices (for use with industrial processes). More specifically, the invention relates to diagnostics of processes using a process variable sensor signal.
Process control devices are used in industrial process control systems to control a process. A control device is a field device which is used to control the process and includes pumps, valves, actuators, solenoids, motors, mixers, agitators, breaker, crusher, roller, mill, ball mill, kneader, blender, filter, cyclone, centrifuge, tower, dryer, conveyor, separator, elevator, hoist, heater, cooler or others. A valve controller includes a valve actuator coupled to a valve used to control flow of process fluid. A pump controller includes a motor controller or actuator coupled to a pump. Diagnostics of process control devices can be used to identify a failed control device or predict an impending failure.
Sensing vibrations is one method used to diagnose process control devices. A vibration sensor such as an accelerometer placed directly on a control device can be used to sense vibration noise signals generated by the device. Vibrations are isolated and evaluated by identifying those which exceed an amplitude threshold or which have an abnormal frequency which are indicative of an actual or impending failure. For example, sensors are placed on pump or motor housings, discharge valves, or flanges associated with the control device. Another known diagnostic method is a manual inspection in which an operator listens for abnormal sounds from the control device.
These known methods rely on sensing vibrations at the process control device. The automated diagnostic techniques require additional sensors and circuitry to be included in the control device. There is thus a need for improved diagnostic technology which does not rely on additional components in the control device or the inaccurate and time consuming manual inspection of the prior art to isolate and evaluate vibration noise signals.
SUMMARY OF THE INVENTION
Diagnostics for diagnosing process devices isolates and evaluates vibration noise signals in the process fluid using a process variable sensor signal. The signal preprocessor isolates signal components in the sensor signal related to operation of the process and provides an isolated signal output. A signal evaluator provides a condition output related to a condition of the process control device as a function of the isolated signal. The diagnostic device is in a process control system, and vibrations from the process are transferred through process fluid to a process variable sensor used by the diagnostic device. A sensor input receives the process variable sensor signal from the process variable sensor. A portion of the sensor signal is related to the vibrations in the process which are carried in the process fluid.


REFERENCES:
patent: 3096434 (1963-07-01), King
patent: 3404264 (1968-10-01), Kugler
patent: 3468164 (1969-09-01), Sutherland
patent: 3590370 (1971-06-01), Fleischer
patent: 3688190 (1972-08-01), Blum
patent: 3691842 (1972-09-01), Akeley
patent: 3701280 (1972-10-01), Stroman
patent: 3849637 (1974-11-01), Caruso et al.
patent: 3855858 (1974-12-01), Cushing
patent: 3952759 (1976-04-01), Ottenstein
patent: 3973184 (1976-08-01), Raber
patent: RE29383 (1977-09-01), Gallatin et al.
patent: 4058975 (1977-11-01), Gilbert et al.
patent: 4099413 (1978-07-01), Ohte et al.
patent: 4102199 (1978-07-01), Talpouras
patent: 4122719 (1978-10-01), Carlson et al.
patent: 4249164 (1981-02-01), Tivy
patent: 4250490 (1981-02-01), Dahlke
patent: 4279013 (1981-07-01), Cameron et al.
patent: 4337516 (1982-06-01), Murphy et al.
patent: 4399824 (1983-08-01), Davidson
patent: 4417312 (1983-11-01), Cronin et al.
patent: 4517468 (1985-05-01), Kemper et al.
patent: 4530234 (1985-07-01), Cullick et al.
patent: 4571689 (1986-02-01), Hildebrand et al.
patent: 4635214 (1987-01-01), Kasai et al.
patent: 4642782 (1987-02-01), Kemper et al.
patent: 4644479 (1987-02-01), Kemper et al.
patent: 4649515 (1987-03-01), Thompson et al.
patent: 4668473 (1987-05-01), Agarwal
patent: 4707796 (1987-11-01), Calabro et al.
patent: 4720806 (1988-01-01), Schippers et al.
patent: 4736367 (1988-04-01), Wroblewski et al.
patent: 4736763 (1988-04-01), Britton et al.
patent: 4777585 (1988-10-01), Kokawa et al.
patent: 4818994 (1989-04-01), Orth et al.
patent: 4831564 (1989-05-01), Suga
patent: 4841286 (1989-06-01), Kummer
patent: 4853693 (1989-08-01), Eaton-Williams
patent: 4873655 (1989-10-01), Kondraske
patent: 4907167 (1990-03-01), Skeirik
patent: 4924418 (1990-05-01), Backman et al.
patent: 4934196 (1990-06-01), Romano
patent: 4939753 (1990-07-01), Olson
patent: 4964125 (1990-10-01), Kim
patent: 4988990 (1991-01-01), Warrior
patent: 4992965 (1991-02-01), Holter et al.
patent: 5005142 (1991-04-01), Lipchak et al.
patent: 5043862 (1991-08-01), Takahashi et al.
patent: 5053815 (1991-10-01), Wendell
patent: 5067099 (1991-11-01), McCown et al.
patent: 5081598 (1992-01-01), Bellows et al.
patent: 5089979 (1992-02-01), McEachern et al.
patent: 5089984 (1992-02-01), Struger et al.
patent: 5098197 (1992-03-01), Shepard et al.
patent: 5099436 (1992-03-01), McCown et al.
patent: 5103409 (1992-04-01), Shimizu et al.
patent: 5111531 (1992-05-01), Grayson et al.
patent: 5121467 (1992-06-01), Skeirik
patent: 5122794 (1992-06-01), Warrior
patent: 5122976 (1992-06-01), Bellows et al.
patent: 5130936 (1992-07-01), Sheppard et al.
patent: 5134574 (1992-07-01), Beaverstock et al.
patent: 5137370 (1992-08-01), McCullock et al.
patent: 5142612 (1992-08-01), Skeirik
patent: 5143452 (1992-09-01), Maxedon et al.
patent: 5148378 (1992-09-01), Shibayama et al.
patent: 5167009 (1992-11-01), Skeirik
patent: 5175678 (1992-12-01), Frerichs et al.
patent: 5193143 (1993-03-01), Kaemmerer et al.
patent: 5197114 (1993-03-01), Skeirik
patent: 5197328 (1993-03-01), Fitzgerald
patent: 5212765 (1993-05-01), Skeirik
patent: 5214582 (1993-05-01), Gray
patent: 5224203 (1993-06-01), Skeirik
patent: 5228780 (1993-07-01), Shepard et al.
patent: 5235527 (1993-08-01), Ogawa et al.
patent: 5265031 (1993-11-01), Malczewski
patent: 5265222 (1993-11-01), Nishiya et al.
patent: 5269311 (1993-12-01), Kirchner et al.
patent: 5274572 (1993-12-01), O'Neill et al.
patent: 5282131 (1994-01-01), Rudd et al.
patent: 5282261 (1994-01-01), Skeirik
patent: 5293585 (1994-03-01), Morita
patent: 5303181 (1994-04-01), Stockton
patent: 5305230 (1994-04-01), Matsumoto et al.
patent: 5311421 (1994-05-01), Nomura et al.
patent: 5317520 (1994-05-01), Castle
patent: 5327357 (1994-07-01), Feinstein et al.
patent: 5333240 (1994-07-01), Matsumoto et al.
patent: 5347843 (1994-09-01), Orr et al.
patent: 5349541 (1994-09-01), Alexandro, Jr. et al.
patent: 5357449 (1994-10-01), Oh
patent: 5361628 (1994-11-01), Marko et al.
patent: 5365423 (1994-11-01), Chand
patent: 5365787 (1994-11-01), Hernandez et al.
patent: 5367612 (1994-11-01), Bozich et al.
patent: 5384699 (1995-01-01), Levy et al.
patent: 5386373 (1995-01-01), Keller et al.
patent: 5388465 (1995-02-01), Okaniwa et al.
patent: 5394341 (1995-02-01), Kepner
patent: 5394543 (1995-02-01), Hill et al.
patent: 5404064 (1995-04-01), Mermelstein et al.
patent: 5408406 (1995-04-01), Mathur et al.
patent: 5408586 (1995-04-01), Skeirik
patent: 5414645 (1995-05-01), Hirano
patent: 5419197 (1995-05-01), Ogi et al.
patent: 5430642 (1995-07-01), Nakajima et al.
patent: 5434774 (1995-07-01), Seberger
patent: 5436705 (1995-07-01), Raj
patent: 5440478 (1995-08-01), Fisher et al.
patent: 5442639 (1995-08-01), Crowder et al.
patent: 5467355 (1995-11-01), Umeda et al.
patent: 5469070 (1995-11-01), Koluvek
patent: 5469156 (1995-11-01), Kogura
patent: 5469735 (1995-11-01), Watanabe
patent: 5469749 (1995-11-01), Shimada et al.
patent: 5481199 (1996-01-01), Anderson et al.
patent: 5483387 (1996-01-01), Bauhahn et al.
patent: 5485753 (1996-01-01), Burns et al.
patent: 5486996 (1996-01-01), Samad et al.
patent: 5488697 (1996-01-01), Kaemmerer et al.
patent: 5489831 (1996-02-01), Harris
patent: 5495769 (1996-03-01), Borden e

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