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Computerized evaluation of process control device signature graphs

A characteristic curve and process control technology, applied in general control systems, control/regulation systems, test/monitoring control systems, etc., can solve problems such as excessive time spent

Active Publication Date: 2009-07-15
FISHER CONTROLS INT LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, because a process control system may include many control valves or other similar control devices, even though it is possible to collect measured characteristic curve data at a central point for analysis, it is possible for an operator to individually test each control valve or control in a plant. The characteristic curve diagram of the equipment may also take too much time

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  • Computerized evaluation of process control device signature graphs
  • Computerized evaluation of process control device signature graphs
  • Computerized evaluation of process control device signature graphs

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Embodiment Construction

[0017] While the following text presents a detailed description of various embodiments, it should be understood that the legal scope of that description is defined by the words of the claims at the end of this patent. The detailed description will be analyzed as an example only and does not describe every possible embodiment since describing every possible embodiment would be impractical, if not impossible. Many alternative embodiments could be implemented, using either current technology or technology developed after the filing date of this patent, which would still fall within the scope of the claims.

[0018] Control devices for a process control system may include process control devices such as control valves, dampers, or other variable opening devices to regulate or control the flow of liquids in the process control system. It will be understood by those skilled in the art that although the exemplary embodiments described herein are based on pneumatically controlled valv...

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Abstract

The claimed method and system may measure or receive signature data from a process control device, such as a valve, and analyze the data against user configurable boundaries and settings to determine if there is a problem with the operation of the control device. One or more signature graphs that were measured from a prior period may be displayed to a user to assist the user in configuring the characteristic boundaries and settings. The claimed method and system may evaluate a current signature graph against a user configured boundary to determine, among other characteristics, whether a maximum or minimum friction or torque threshold has been crossed, whether the integrity of an actuator or valve shaft has been compromised, and whether valve stick-slip occurrences are within a tolerance level.

Description

technical field [0001] This invention relates to process control diagnostics, and more particularly to computerized diagnostic testing of process control equipment. Background technique [0002] Existing process control systems may perform periodic diagnostics on process control equipment such as valves or process control components to determine the operability and performance of such equipment. Determining the operability of process control equipment may allow for better scheduling of maintenance of the process control equipment, thereby reducing failure occurrences and downtime. This can lead to increased efficiency, safety, and revenue. Process control systems may use various sensors and other measurement devices to observe characteristics of process control equipment. For example, some existing control systems may use digital valve controllers to measure and collect data from various sensors on the control valve. [0003] One diagnostic employed with control valves is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02
CPCG05B23/0232G05B23/0221
Inventor 迈克尔·约翰·特韦斯马赫什·加德
Owner FISHER CONTROLS INT LLC